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Zhang C, Zhang R, Zhang R, Zhang Q, Zhang Zhangjunlong Pku Edu Cn JL, Ding Z. Spectroscopy and absolute quantum efficiency of near-infrared electrochemiluminescence for a macrocyclic palladium complex. J Inorg Biochem 2024; 254:112514. [PMID: 38422586 DOI: 10.1016/j.jinorgbio.2024.112514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 02/03/2024] [Accepted: 02/23/2024] [Indexed: 03/02/2024]
Abstract
Electrochemiluminescence (ECL) is widely applied as a reliable tool in clinical diagnosis, including immunoassays, cancer biomarker detection, etc. Metal complexes with emission in the near-infrared (NIR) range possess distinct features such as high transmission and minimal tissue auto-absorption, making them versatile for applications in biosensing and other fields. Through ECL spectral studies of an O-linked nonaromatic benzitripyrrin (C^N^N^N) macrocyclic palladium complex (Pd1) with multiple pyrrole structures, we observed emission peaks from the Qx(0,0) and its vibronic Qx(0,1) bands during both photoluminescence (PL) and ECL. Notably, the emission from the Qx(0,1) band was significantly enhanced in the ECL spectrum, demonstrating higher selectivity for near-infrared light at 743 nm. In the ECL annihilation pathway, the appearance of ECL signals showed a strong correlation with the redox processes of the tri-pyrrin structure, revealing a cyclic tri-pyrrin ligand-centered nature with contributions from the metal center. Upon the introduction of tripropylamine (TPrA) and benzoyl peroxide (BPO) coreactants, the ECL signals exhibited enhancements ranging from several hundred to tens of times. Various reaction routes within different coreactant systems are extensively discussed. Additionally, the absolute quantum efficiencies of the Pd1/TPrA coreactant system were determined, showing efficiencies of 0.0032% ± 0.0005% and 0.000074% ± 0.000016% during pulsing and CV scan processes, respectively. This work addresses gaps in the study of palladacycle complexes in ECL and provides insights into the design of NIR luminescent structures that contribute to the fast screening and deep tissue penetration bioimaging techniques.
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Affiliation(s)
- Congyang Zhang
- Department of Chemistry, Western University, London, ON N6A 5B7, Canada; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Ruizhong Zhang
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, China
| | - Ruijing Zhang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China; Spin-X Institute, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Qiao Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Jun-Long Zhang Zhangjunlong Pku Edu Cn
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Zhifeng Ding
- Department of Chemistry, Western University, London, ON N6A 5B7, Canada.
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Ling B, Chen L, Zhang J, Cao X, Ye W, Ouyang Y, Chi F, Ding Z. [Dosimetric analysis of different optimization algorithms for three-dimensional brachytherapy for gynecologic tumors]. Nan Fang Yi Ke Da Xue Xue Bao 2024; 44:773-779. [PMID: 38708512 DOI: 10.12122/j.issn.1673-4254.2024.04.20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/07/2024]
Abstract
OBJECTIVE To investigate the dosimetric difference between manual and inverse optimization in 3-dimensional (3D) brachytherapy for gynecologic tumors. METHODS This retrospective study was conducted among a total of 110 patients with gynecologic tumors undergoing intracavitary combined with interstitial brachytherapy or interstitial brachytherapy. Based on the original images, the brachytherapy plans were optimized for each patient using Gro, IPSA1, IPSA2 (with increased volumetric dose limits on the basis of IPSA1) and HIPO algorithms. The dose-volume histogram (DVH) parameters of the clinical target volume (CTV) including V200, V150, V100, D90, D98 and CI, and the dosimetric parameters D2cc, D1cc, and D0.1cc for the bladder, rectum, and sigmoid colon were compared among the 4 plans. RESULTS Among the 4 plans, Gro optimization took the longest time, followed by HIPO, IPSA2 and IPSA1 optimization. The mean D90, D98, and V100 of HIPO plans were significantly higher than those of Gro and IPSA plans, and D90 and V100 of IPSA1, IPSA2 and HIPO plans were higher than those of Gro plans (P < 0.05), but the CI of the 4 plans were similar (P > 0.05). For the organs at risk (OARs), the HIPO plan had the lowest D2cc of the bladder and rectum; the bladder absorbed dose of Gro plans were significantly greater than those of IPSA1 and HIPO (P < 0.05). The D2cc and D1cc of the rectum in IPSA1, IPSA2 and HIPO plans were better than Gro (P < 0.05). The D2cc and D1cc of the sigmoid colon did not differ significantly among the 4 plans. CONCLUSION Among the 4 algorithms, the HIPO algorithm can better improve dose coverage of the target and lower the radiation dose of the OARs, and is thus recommended for the initial plan optimization. Clinically, the combination of manual optimization can achieve more individualized dose distribution of the plan.
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Affiliation(s)
- B Ling
- Department of Radiation Medicine, School of Public Health, Southern Medical University, Guangzhou 510515, China
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
| | - L Chen
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
| | - J Zhang
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
| | - X Cao
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
| | - W Ye
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
| | - Y Ouyang
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
| | - F Chi
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
| | - Z Ding
- Department of Radiation Medicine, School of Public Health, Southern Medical University, Guangzhou 510515, China
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Hu P, Zhang C, Chu M, Wang X, Wang L, Li Y, Yan T, Zhang L, Ding Z, Cao M, Xu P, Li Y, Cui Y, Zhang Q, Chen J, Chi L. Stable Interfacial Ruthenium Species for Highly Efficient Polyolefin Upcycling. J Am Chem Soc 2024; 146:7076-7087. [PMID: 38428949 DOI: 10.1021/jacs.4c00757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2024]
Abstract
The present polyolefin hydrogenolysis recycling cases acknowledge that zerovalent Ru exhibits high catalytic activity. A pivotal rationale behind this assertion lies in the propensity of the majority of Ru species to undergo reduction to zerovalent Ru within the hydrogenolysis milieu. Nonetheless, the suitability of zerovalent Ru as an optimal structural configuration for accommodating multiple elementary reactions remains ambiguous. Here, we have constructed stable Ru0-Ruδ+ complex species, even under reaction conditions, through surface ligand engineering of commercially available Ru/C catalysts. Our findings unequivocally demonstrate that surface-ligated Ru species can be stabilized in the form of a Ruδ+ state, which, in turn, engenders a perturbation of the σ bond electron distribution within the polyolefin carbon chain, ultimately boosting the rate-determining step of C-C scission. The optimized catalysts reach a solid conversion rate of 609 g·gRu-1·h-1 for polyethylene. This achievement represents a 4.18-fold enhancement relative to the pristine Ru/C catalyst while concurrently preserving a remarkable 94% selectivity toward valued liquid alkanes. Of utmost significance, this surface ligand engineering can be extended to the gentle mixing of catalysts in ligand solution at room temperature, thus rendering it amenable for swift integration into industrial processes involving polyolefin degradation.
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Affiliation(s)
- Ping Hu
- Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, P. R. China
| | - Congyang Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China
- Department of Chemistry, University of Western Ontario, London N6A 5B7, Canada
| | - Mingyu Chu
- Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, P. R. China
| | - Xianpeng Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China
- Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Macau 999078, P. R. China
| | - Lu Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, P. R. China
| | - Youyong Li
- Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, P. R. China
- Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Macau 999078, P. R. China
| | - Tianran Yan
- Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, P. R. China
| | - Liang Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, P. R. China
| | - Zhifeng Ding
- Department of Chemistry, University of Western Ontario, London N6A 5B7, Canada
| | - Muhan Cao
- Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, P. R. China
| | - Panpan Xu
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China
| | - Yifan Li
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China
| | - Yi Cui
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China
| | - Qiao Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China
| | - Jinxing Chen
- Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, P. R. China
| | - Lifeng Chi
- Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, P. R. China
- Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Macau 999078, P. R. China
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Wu Q, Wang X, Hao S, Wu Y, Zhang W, Chen L, Yan C, Lu Y, Chen Y, Ding Z. Synergetic effects and inhibition mechanisms of the polysaccharide-selenium nanoparticle complex in human hepatocarcinoma cell proliferation. J Sci Food Agric 2024. [PMID: 38284440 DOI: 10.1002/jsfa.13335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 11/01/2023] [Accepted: 01/26/2024] [Indexed: 01/30/2024]
Abstract
BACKGROUND Active components from natural fungal products have shown promising potential as anti-tumor therapeutic agents. In the search for anti-tumor agents, research to overcome the drawbacks of high molecular weight and low bioavailability of pure polysaccharides, polysaccharide-conjugated selenium nanoparticles (SeNPs) has attracted much attention. RESULTS A novel polysaccharide-selenium nanoparticle complex was produced, in which SeNPs were decorated with polysaccharide obtained from fermented mycelia broth of Lactarius deliciosus (FLDP). Transmission electron microscope, dynamic light scattering, and X-ray photoelectron spectroscopy were utilized to characterize the FLDP-SeNPs; and human hepatocarcinoma cell line (HepG2) was used to assess growth inhibition efficacy. The FLDP-SeNPs that were prepared had a spherical shape with the smallest mean diameter of 32 nm. The FLDP-SeNPs showed satisfactory dispersibility and stability after combination, demonstrating that a reliable consolidated structure had formed. The results revealed that FLDP-SeNPs had notable growth inhibition effects on HepG2 cells. They reduced the membrane potential of mitochondria significantly, increased the generation of reactive oxygen species, enhanced levels of both Caspase-3 and Caspase-9, and led to the nucleus in a wrinkled form. CONCLUSION The FLDP-SeNPs could exert a synergetic toxicity reduction and inhibition enhancement effect on HepG2 cells by inducing early apoptosis, through mitochondria-mediated cytochrome C-Caspases and reactive oxygen species-induced DNA damage pathways. These results indicate that FLDP-SeNP treatment of HepG2 cells induced early apoptosis with synergetic efficacy, showing that FLDP-SeNPs can be useful as natural anti-tumor agents. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Qingxi Wu
- School of Life Sciences, Anhui University, Hefei, PR China
- Key Laboratory of Eco-engineering and Biotechnology of Anhui Province and Anhui Key Laboratory of Modern Biomanufacturing, Hefei, PR China
| | - Xiaohui Wang
- School of Life Sciences, Anhui University, Hefei, PR China
| | - Siwei Hao
- School of Life Sciences, Anhui University, Hefei, PR China
| | - Yingchao Wu
- School of Life Sciences, Anhui University, Hefei, PR China
| | - Wenna Zhang
- School of Life Sciences, Anhui University, Hefei, PR China
- Key Laboratory of Eco-engineering and Biotechnology of Anhui Province and Anhui Key Laboratory of Modern Biomanufacturing, Hefei, PR China
| | - Lei Chen
- School of Life Sciences, Anhui University, Hefei, PR China
- Key Laboratory of Eco-engineering and Biotechnology of Anhui Province and Anhui Key Laboratory of Modern Biomanufacturing, Hefei, PR China
| | - Chao Yan
- School of Life Sciences, Anhui University, Hefei, PR China
- Key Laboratory of Eco-engineering and Biotechnology of Anhui Province and Anhui Key Laboratory of Modern Biomanufacturing, Hefei, PR China
| | - Yongming Lu
- School of Life Sciences, Anhui University, Hefei, PR China
- Key Laboratory of Eco-engineering and Biotechnology of Anhui Province and Anhui Key Laboratory of Modern Biomanufacturing, Hefei, PR China
| | - Yan Chen
- School of Life Sciences, Anhui University, Hefei, PR China
- Key Laboratory of Eco-engineering and Biotechnology of Anhui Province and Anhui Key Laboratory of Modern Biomanufacturing, Hefei, PR China
| | - Zhifeng Ding
- Department of Chemistry, The University of Western Ontario, London, Canada
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Qin X, Jahanghiri S, Zhan Z, Chu K, Khangura J, Ding Z. Quantification strategy of absolute chemiluminescence efficiency for systems of luminol with hydrogen peroxide. Anal Chim Acta 2024; 1285:342023. [PMID: 38057060 DOI: 10.1016/j.aca.2023.342023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/03/2023] [Accepted: 11/09/2023] [Indexed: 12/08/2023]
Abstract
An important feature to be determined in mechanistic studies on chemiluminescence (CL) is its quantum efficiency, which can give significant chemical reaction information on the influence of the reactant structures and reaction conditions. However, most of the previous quantitative measurements of luminescence and quantum efficiencies are complex and incomplete. To overcome the inconvenience and underestimated quantum efficiency in each measurement, we report a simple and highly effective strategy to determine the absolute CL quantum efficiencies for three systems of luminol with hydrogen peroxide by means of a spectrometer along with an integrating sphere. The integrating sphere facilitated collection of all the emitted light and then transferred it to the spectrometer via an optical fiber proportionally. The CL quantum efficiency was determined by taking the ratio of total photons generated in the reaction system to the number of the limiting reactant molecules consumed. Absolute CL efficiencies of three luminol-H2O2 reaction systems with varied reactant concentrations or coreactants were found to be 37 %, 7.0 % and 6.6 % in a time course, which are much higher than those previously reported values of 1.0-1.3 %. Due to our complete photon collection design, a higher absolute CL efficiency can be realized. Furthermore, spooling CL spectra also provided a powerful visualization tool to observe the real-time CL evolution and devolution, allowing the study on kinetics of CL reaction systems. The above investigations are anticipated to promote further development of CL methodologies and their applications.
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Affiliation(s)
- Xiaoli Qin
- Department of Chemistry, Western University, London, ON, N6A 5B7, Canada; College of Chemistry and Material Science, Hunan Agricultural University, Changsha, 410128, China
| | - Sara Jahanghiri
- Department of Chemistry, Western University, London, ON, N6A 5B7, Canada
| | - Ziying Zhan
- Department of Chemistry, Western University, London, ON, N6A 5B7, Canada
| | - Kenneth Chu
- Department of Chemistry, Western University, London, ON, N6A 5B7, Canada
| | - Jugraj Khangura
- Department of Chemistry, Western University, London, ON, N6A 5B7, Canada
| | - Zhifeng Ding
- Department of Chemistry, Western University, London, ON, N6A 5B7, Canada.
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Niu J, Miao B, Guo J, Ding Z, He Y, Chi Z, Wang F, Ma X. Leveraging Deep Neural Networks for Estimating Vickers Hardness from Nanoindentation Hardness. Materials (Basel) 2023; 17:148. [PMID: 38204003 PMCID: PMC10780037 DOI: 10.3390/ma17010148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 12/22/2023] [Accepted: 12/26/2023] [Indexed: 01/12/2024]
Abstract
This research presents a comprehensive analysis of deep neural network models (DNNs) for the precise prediction of Vickers hardness (HV) in nitrided and carburized M50NiL steel samples, with hardness values spanning from 400 to 1000 HV. By conducting rigorous experimentation and obtaining corresponding nanoindentation data, we evaluated the performance of four distinct neural network architectures: Multilayer Perceptron (MLP), Convolutional Neural Network (CNN), Long Short-Term Memory network (LSTM), and Transformer. Our findings reveal that MLP and LSTM models excel in predictive accuracy and efficiency, with MLP showing exceptional iteration efficiency and predictive precision. The study validates models for broad application in various steel types and confirms nanoindentation as an effective direct measure for HV hardness in thin films and gradient-variable regions. This work contributes a validated and versatile approach to the hardness assessment of thin-film materials and those with intricate microstructures, enhancing material characterization and potential application in advanced material engineering.
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Affiliation(s)
- Junbo Niu
- School of Material Science & Engineering, Harbin Institute of Technology, Harbin 150001, China; (B.M.); (J.G.); (Z.D.); (Y.H.); (Z.C.); (F.W.)
| | - Bin Miao
- School of Material Science & Engineering, Harbin Institute of Technology, Harbin 150001, China; (B.M.); (J.G.); (Z.D.); (Y.H.); (Z.C.); (F.W.)
| | - Jiaxu Guo
- School of Material Science & Engineering, Harbin Institute of Technology, Harbin 150001, China; (B.M.); (J.G.); (Z.D.); (Y.H.); (Z.C.); (F.W.)
| | - Zhifeng Ding
- School of Material Science & Engineering, Harbin Institute of Technology, Harbin 150001, China; (B.M.); (J.G.); (Z.D.); (Y.H.); (Z.C.); (F.W.)
| | - Yin He
- School of Material Science & Engineering, Harbin Institute of Technology, Harbin 150001, China; (B.M.); (J.G.); (Z.D.); (Y.H.); (Z.C.); (F.W.)
| | - Zhiyu Chi
- School of Material Science & Engineering, Harbin Institute of Technology, Harbin 150001, China; (B.M.); (J.G.); (Z.D.); (Y.H.); (Z.C.); (F.W.)
| | - Feilong Wang
- School of Material Science & Engineering, Harbin Institute of Technology, Harbin 150001, China; (B.M.); (J.G.); (Z.D.); (Y.H.); (Z.C.); (F.W.)
| | - Xinxin Ma
- School of Material Science & Engineering, Harbin Institute of Technology, Harbin 150001, China; (B.M.); (J.G.); (Z.D.); (Y.H.); (Z.C.); (F.W.)
- State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
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Wang D, Wang J, Wu Y, Liu C, Huang Y, Chen Y, Ding Z, Guan Y, Wu Q. Amelioration of Acute Alcoholic Liver Injury via Attenuating Oxidative Damage and Modulating Inflammation by Means of Ursodeoxycholic Acid-Zein Nanoparticles. J Agric Food Chem 2023; 71:17080-17096. [PMID: 38104279 DOI: 10.1021/acs.jafc.3c04786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Ursodeoxycholic acid (UDCA) has been broadly adopted for the clinical treatment of hepatic and biliary diseases; however, its poor water-solubility becomes an obstacle in wide applications. To overcome these challenges, herein, a two-tier UDCA-embedded system of zein nanoparticles (NPs) along with a polyelectrolyte complex was designed under facile conditions. Both the UDCA-zein NPs and their inclusion microcapsules showed a spherical shape with a uniform size. A typical wall plus capsule/core structure was formed in which UDCA-zein NPs distributed evenly in the interior. The UDCA inclusion microcapsules had an encapsulation rate of 67% and were released in a non-Fickian or anomalous transport manner. The bioavailability and efficacy of UDCA-zein NPs were assessed in vivo through the alcoholic liver disease (ALD) mouse model via intragastric administration. UDCA-zein NPs ameliorated the symptoms of ALD mice remarkably, which were mainly exerted through attenuation of antioxidant stress levels. Meanwhile, it notably upregulated the intestinal tight junction protein expression and improved and maintained the integrity of the mucosal barrier effectively. Collectively, with the improvement of bioavailability, the UDCA-zein NPs prominently alleviated the oxidative damage induced by alcohol, modulating the inflammation so as to restore ALD. It is anticipated that UDCA-zein NPs have great therapeutic potential as sustained-nanovesicles in ALD treatment.
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Affiliation(s)
- Dong Wang
- School of Life Sciences, Key Laboratory of Eco-engineering and Biotechnology of Anhui Province and Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei 230601, Anhui, PR China
| | - Jing Wang
- School of Life Sciences, Key Laboratory of Eco-engineering and Biotechnology of Anhui Province and Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei 230601, Anhui, PR China
| | - Yingchao Wu
- School of Life Sciences, Key Laboratory of Eco-engineering and Biotechnology of Anhui Province and Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei 230601, Anhui, PR China
| | - Caixia Liu
- School of Life Sciences, Key Laboratory of Eco-engineering and Biotechnology of Anhui Province and Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei 230601, Anhui, PR China
| | - Yuzhe Huang
- School of Life Sciences, Key Laboratory of Eco-engineering and Biotechnology of Anhui Province and Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei 230601, Anhui, PR China
| | - Yan Chen
- School of Life Sciences, Key Laboratory of Eco-engineering and Biotechnology of Anhui Province and Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei 230601, Anhui, PR China
| | - Zhifeng Ding
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Yixin Guan
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China
| | - Qingxi Wu
- School of Life Sciences, Key Laboratory of Eco-engineering and Biotechnology of Anhui Province and Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei 230601, Anhui, PR China
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Liu Y, Zhang C, Feng J, Wang X, Ding Z, He L, Zhang Q, Chen J, Yin Y. Integrated Photochromic-Photothermal Processes for Catalytic Plastic Upcycling. Angew Chem Int Ed Engl 2023; 62:e202308930. [PMID: 37527972 DOI: 10.1002/anie.202308930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 07/28/2023] [Accepted: 08/01/2023] [Indexed: 08/03/2023]
Abstract
Incorporating high-energy ultraviolet (UV) photons into photothermal catalytic processes may enable photothermal-photochemical synergistic catalysis, which represents a transformative technology for waste plastic recycling. The major challenge is avoiding side reactions and by-products caused by these energetic photons. Here, we break through the limitation of the existing photothermal conversion mechanism and propose a photochromic-photothermal catalytic system based on polyol-ligated TiO2 nanocrystals. Upon UV or sunlight irradiation, the chemically bonded polyols can rapidly capture holes generated by TiO2 , enabling photogenerated electrons to reduce Ti4+ to Ti3+ and produce oxygen vacancies. The resulting abundant defect energy levels boost sunlight-to-heat conversion efficiency, and simultaneously the oxygen vacancies facilitate polyester glycolysis by activating the nucleophilic addition-elimination process. As a result, compared to commercial TiO2 (P25), we achieve 6-fold and 12.2-fold performance enhancements under thermal and photothermal conditions, respectively, while maintaining high selectivity to high-valued monomers. This paradigm-shift strategy directs energetic UV photons for activating catalysts and avoids their interaction with reactants, opening the possibility of substantially elevating the efficiency of more solar-driven catalysis.
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Affiliation(s)
- Yu Liu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, P. R. China
| | - Congyang Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, P. R. China
- Department of Chemistry, University of Western Ontario, London, Ontario, N6A 5B7, Canada
| | - Ji Feng
- Department of Chemistry, University of California, Riverside, CA, 92521, USA
| | - Xuchun Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, P. R. China
- Department of Chemistry, University of Western Ontario, London, Ontario, N6A 5B7, Canada
| | - Zhifeng Ding
- Department of Chemistry, University of Western Ontario, London, Ontario, N6A 5B7, Canada
| | - Le He
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, P. R. China
| | - Qiao Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, P. R. China
| | - Jinxing Chen
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, P. R. China
| | - Yadong Yin
- Department of Chemistry, University of California, Riverside, CA, 92521, USA
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9
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Chu K, Ding Z, Zysman-Colman E. Materials for Electrochemiluminescence: TADF, Hydrogen-Bonding, and Aggregation- and Crystallization-Induced Emission Luminophores. Chemistry 2023; 29:e202301504. [PMID: 37344360 DOI: 10.1002/chem.202301504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 06/20/2023] [Accepted: 06/21/2023] [Indexed: 06/23/2023]
Abstract
Electrochemiluminescence (ECL) is a rapidly growing discipline with many analytical applications from immunoassays to single-molecule detection. At the forefront of ECL research is materials chemistry, which looks at engineering new materials and compounds exhibiting enhanced ECL efficiencies compared to conventional fluorescent materials. In this review, we summarize recent molecular design strategies that lead to high efficiency ECL. In particular, we feature recent advances in the use of thermally activated delayed fluorescence (TADF) emitters to produce enhanced electrochemiluminescence. We also document how hydrogen bonding, aggregation, and crystallization can each be recruited in the design of materials showing enhanced electrochemiluminescence.
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Affiliation(s)
- Kenneth Chu
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
| | - Zhifeng Ding
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
| | - Eli Zysman-Colman
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, Fife, KY16 9ST, UK
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10
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Zhang C, Wang X, Ding Z, Zhou H, Liu P, Xue X, Cao W, Zhu Y, Chen J, Shen W, Yang S, Wang F. [Electroencephalographic microstates in vestibular schwannoma patients with tinnitus]. Nan Fang Yi Ke Da Xue Xue Bao 2023; 43:793-799. [PMID: 37313821 DOI: 10.12122/j.issn.1673-4254.2023.05.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE To explore the biomarkers of tinnitus in vestibular schwannoma patients using electroencephalographic (EEG) microstate technology. METHODS The EEG and clinical data of 41 patients with vestibular schwannoma were collected. All the patients were evaluated by SAS, SDS, THI and VAS scales. The EEG acquisition time was 10-15 min, and the EEG data were preprocessed and analyzed using MATLAB and EEGLAB software package. RESULTS Of the 41 patients with vestibular schwannoma, 29 patients had tinnitus and 12 did not have tinnitus, and their clinical parameters were comparable. The average global explanation variances of the non-tinnitus and tinnitus groups were 78.8% and 80.1%, respectively. The results of EEG microstate analysis showed that compared with those without tinnitus, the patients with tinnitus had an increased frequency (P=0.033) and contribution (P=0.028) of microstate C. Correlation analysis showed that THI scale scores of the patients were negatively correlated with the duration of microstate A (R=-0.435, P=0.018) and positively with the frequencies of microstate B (R=0.456, P=0.013) and microstate C (R=0.412, P=0.026). Syntax analysis showed that the probability of transition from microstate C to microstate B increased significantly in vestibular schwannoma patients with tinnitus (P=0.031). CONCLUSION EEG microstate features differ significantly between vestibular schwannoma patients with and without tinnitus. This abnormality in patients with tinnitus may reflect the potential abnormality in the allocation of neural resources and the transition of brain functional activity.
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Affiliation(s)
- C Zhang
- The First Medical Center, Chinese PLA General Hospital, Beijing 100853, China
- The Sixth Medical Center, Chinese PLA General Hospital, Beijing 100048, China
- Medical School of Chinese PLA, Beijing 100853, China
| | - X Wang
- Medical School of Chinese PLA, Beijing 100853, China
| | - Z Ding
- The Sixth Medical Center, Chinese PLA General Hospital, Beijing 100048, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing 100048, China
| | - H Zhou
- The Sixth Medical Center, Chinese PLA General Hospital, Beijing 100048, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing 100048, China
| | - P Liu
- The Sixth Medical Center, Chinese PLA General Hospital, Beijing 100048, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing 100048, China
| | - X Xue
- The Sixth Medical Center, Chinese PLA General Hospital, Beijing 100048, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing 100048, China
| | - W Cao
- The First Medical Center, Chinese PLA General Hospital, Beijing 100853, China
- The Sixth Medical Center, Chinese PLA General Hospital, Beijing 100048, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing 100048, China
| | - Y Zhu
- The First Medical Center, Chinese PLA General Hospital, Beijing 100853, China
- The Sixth Medical Center, Chinese PLA General Hospital, Beijing 100048, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing 100048, China
| | - J Chen
- The First Medical Center, Chinese PLA General Hospital, Beijing 100853, China
- The Sixth Medical Center, Chinese PLA General Hospital, Beijing 100048, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing 100048, China
| | - W Shen
- The First Medical Center, Chinese PLA General Hospital, Beijing 100853, China
- The Sixth Medical Center, Chinese PLA General Hospital, Beijing 100048, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing 100048, China
| | - S Yang
- The First Medical Center, Chinese PLA General Hospital, Beijing 100853, China
- The Sixth Medical Center, Chinese PLA General Hospital, Beijing 100048, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing 100048, China
| | - F Wang
- The First Medical Center, Chinese PLA General Hospital, Beijing 100853, China
- The Sixth Medical Center, Chinese PLA General Hospital, Beijing 100048, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing 100048, China
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11
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Zhao X, Zhu R, Anikovskiy M, Wu Q, Ding Z. Profiling H 2O 2 from single COS-7 cells by means of scanning electrochemical microscopy. Biosens Bioelectron 2023; 227:115123. [PMID: 36812793 DOI: 10.1016/j.bios.2023.115123] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/22/2023] [Accepted: 02/02/2023] [Indexed: 02/09/2023]
Abstract
We report quantitative determination of extracellular H2O2 released from single COS-7 cells with high spatial resolution, using scanning electrochemical microscopy (SECM). Our strategy of depth scan imaging in vertical x-z plane was conveniently utilized to a single cell for obtaining probe approach curves (PACs) to any positions on the membrane of a live cell by simply drawing a vertical line on one depth SECM image. This SECM mode provides an efficient way to record a batch of PACs, and visualize cell topography simultaneously. The H2O2 concentration at the membrane surface in the center of an intact COS-7 cell was deconvoluted from apparent O2, and determined to be 0.020 mM by overlapping the experimental PAC with the simulated one having a known H2O2 release value. The H2O2 profile determined in this way gives insight into physiological activity of single live cells. In addition, intracellular H2O2 profile was demonstrated using confocal microscopy by labelling the cells with a luminomphore, 2',7'-dichlorodihydrofluorescein diacetate. The two methodologies have illustrated complementary experimental results of H2O2 detection, indicating that H2O2 generation is centered at endoplasmic reticula.
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Affiliation(s)
- Xiaocui Zhao
- Department of Chemistry, The University of Western Ontario, Chemistry Building, 1151 Richmond Street, London, Ontario, N6A 5B7, Canada
| | - Renkang Zhu
- Department of Chemistry, The University of Western Ontario, Chemistry Building, 1151 Richmond Street, London, Ontario, N6A 5B7, Canada
| | - Max Anikovskiy
- Department of Chemistry, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Qingxi Wu
- School of Life Sciences, Anhui University, Hefei, 230601, Anhui, China
| | - Zhifeng Ding
- Department of Chemistry, The University of Western Ontario, Chemistry Building, 1151 Richmond Street, London, Ontario, N6A 5B7, Canada.
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12
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Qin X, Yang L, Zhan Z, Cieplechowicz E, Chu K, Zhang C, Jahanghiri S, Welch GC, Ding Z. A graphene-like N-annulated perylene diimide dimer compound for highly efficient electrochemiluminescence. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2023]
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13
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Qin X, Zhan Z, Zhang R, Chu K, Whitworth Z, Ding Z. Nitrogen- and sulfur-doped graphene quantum dots for chemiluminescence. Nanoscale 2023; 15:3864-3871. [PMID: 36723371 DOI: 10.1039/d2nr07213k] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Graphene quantum dots (GQDs), as one of the most promising luminescent nanomaterials, have been receiving increasing attention in various applications. However, it is still a challenge to improve their chemiluminescence (CL) quantum efficiency. Herein, the CL emissions of nitrogen- and sulfur-doped GQDs (NS-GQDs), nitrogen-doped GQDs (N-GQDs) and undoped GQDs synthesized through one-pot high-temperature pyrolysis are investigated in their chemical reactions with bis(2-carbopentyloxy-3,5,6-trichlorophenyl) oxalate (CPPO) and hydrogen peroxide (H2O2). A bright blue emission, and yellowish green and yellowish white light from NS-GQDs, N-GQDs and GQDs can be observed, respectively, in the mixture solutions with CPPO and H2O2. For the first time, spooling CL spectroscopy was used to investigate the CL reaction mechanisms, illuminant decays and the absolute CL efficiencies of these three GQD systems. Compared with the same system of undoped GQDs, it has been found that the NS-GQDs not only present slower illuminant decay, but also display an absolute CL quantum efficiency of 0.01%, 5-fold enhancement, due to the increase in N and S doping for a well-defined band gap energy. Moreover, three peak wavelengths attributed to intrinsic emission at 425 nm, aggregation-induced emission (AIE) at 575 nm and S-doped emissive surface states at 820 nm are observed for the first time in the NS-GQD system. The CL spectrum of N-GQDs displays two emission peaks at 395 and 575 nm attributed to intrinsic emission and AIE, whereas the CL spectrum of undoped GQDs demonstrates 500 nm and 600 nm peak wavelengths attributed to core emission and AIE. Absolute CL quantum efficiencies from these emissions at these various peaks can be determined quantitatively. This study provides guidance on tuning the surface states of GQD for more conducive injection of electrons and holes, facilitating the production of CL emission, which is beneficial for promoting the development of optical, bioassay and energy conversion applications.
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Affiliation(s)
- Xiaoli Qin
- Department of Chemistry, Western University, London, Ontario N6A 5B7, Canada.
- College of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Ziying Zhan
- Department of Chemistry, Western University, London, Ontario N6A 5B7, Canada.
| | - Ruizhong Zhang
- Department of Chemistry, Western University, London, Ontario N6A 5B7, Canada.
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, China
| | - Kenneth Chu
- Department of Chemistry, Western University, London, Ontario N6A 5B7, Canada.
| | - Zackry Whitworth
- Department of Chemistry, Western University, London, Ontario N6A 5B7, Canada.
| | - Zhifeng Ding
- Department of Chemistry, Western University, London, Ontario N6A 5B7, Canada.
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14
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Chu K, Adsetts JR, Whitworth Z, Kumar S, Zysman-Colman E, Ding Z. Elucidation of an Aggregate Excited State in the Electrochemiluminescence and Chemiluminescence of a Thermally Activated Delayed Fluorescence (TADF) Emitter. Langmuir 2023; 39:2829-2837. [PMID: 36763045 PMCID: PMC9948541 DOI: 10.1021/acs.langmuir.2c03391] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 01/27/2023] [Indexed: 06/01/2023]
Abstract
The electrochemistry, electrochemiluminescence (ECL), and chemiluminescence (CL) properties of a thermally activated delayed fluorescence (TADF) emitter 4,4'-(1,2-dihydroacenaphthylene-5,6-diyl)bis(N,N-diphenylaniline) (TPA-ace-TRZ) and three of its analogues were investigated. TPA-ace-TRZ exhibits both (a) delayed onset of ECL and (b) long-persistent luminescence, which we have attributed to the formation of an aggregate excited state in excimer or exciplex form. The evidence of this aggregate excited state was consistent across ECL annihilation and coreactant pathways as well as in CL. The absolute ECL efficiency of TPA-ace-TRZ using benzoyl peroxide (BPO) as a coreactant was found to be 0.028%, which was 9-fold stronger than the [Ru(bpy)3]2+/BPO reference coereactant system. Furthermore, the absolute CL quantum efficiency of TPA-ace-TRZ was determined to be 0.92%. The performance and flexibility of the TADF emitter TPA-ace-TRZ under these various emissive pathways are highly desirable toward applications in sensing, imaging, and light-emitting devices.
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Affiliation(s)
- Kenneth Chu
- Department
of Chemistry, Western University, London, ON N6A 5B7, Canada
| | | | - Zackry Whitworth
- Department
of Chemistry, Western University, London, ON N6A 5B7, Canada
| | - Shiv Kumar
- Organic
Semiconductor Centre, EaStCHEM School of Chemistry, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K.
| | - Eli Zysman-Colman
- Organic
Semiconductor Centre, EaStCHEM School of Chemistry, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K.
| | - Zhifeng Ding
- Department
of Chemistry, Western University, London, ON N6A 5B7, Canada
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15
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Li YY, Qu XL, Ma R, Hu J, Hei Y, Xu WQ, Wu W, Ding Z, Yang XJ. [Treatment of orbital vascular malformations with intralesional bleomycin injection and N-butyl-2-cyanoacrylate glue embolization]. Zhonghua Yan Ke Za Zhi 2023; 59:37-43. [PMID: 36631056 DOI: 10.3760/cma.j.cn112142-20220424-00207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Objective: To evaluate the clinical efficacy of bleomycin lavage combined with N-butyl-2-cyanoacrylate glue embolization and resection in the treatment of orbital vascular malformations. Methods: It was a retrospective case series study. Patients with orbital vascular malformations diagnosed at the Ophthalmology Division of Chinese PLA General Hospital from January 2018 to October 2021 were included and divided into exophthalmos group and non-exophthalmos group based on whether the patients had postural exophthalmos. Intralesional bleomycin injection and N-butyl-2-cyanoacrylate glue embolization were performed. The preoperative and postoperative visual acuity, the dosages of bleomycin and isobutyl cyanoacrylate glue, pathological results, imaging findings and remission rate were recorded and analyzed. The Chi-square test, Wilcoxon signed rank analysis and Mann-Whitney U test were used for statistical analysis. Results: A total of 58 patients (58 eyes)were included, and there were 22 males (37.9%) and 36 females (62.1%). Nineteen (32.8%) patients had postural exophthalmos, and 39 (67.2%) patients did not suffer postural exophthalmos. The patient's age of the two groups was 39.0 (28.0, 54.5) years vs. 14.0 (5.7, 26.5) years, with a statistically significant difference (Z=-3.96, P<0.001). There was no significant difference in gender, eye laterality, follow-up time and the disease course between the two groups (all P>0.05). During the operation, the dosage of bleomycin was 15 000 (13 500, 15 000) U in the exophthalmos group, and 15 000 (9 000, 16 500) U in the non-exophthalmos group (Z=-0.70, P=0.944). The dosages of N-butyl-2-cyanoacrylate glue were 2.8 (1.0, 3.0) ml and 1.7 (1.0, 2.2) ml, respectively, in the two groups, with no significant difference (Z=-1.11, P=0.268). There was no visual impairment in both groups, while the visual acuity in 5 patients without postural exophthalmos was improved postoperatively. The imaging examination results showed no difference in the malformed vascular area before and after the treatment in the exophthalmos group [384.0 (329.0, 458.0) mm2 vs. 330.5 (271.6, 356.7) mm2; Z=-1.26, P=0.208], but a significantly decreased area after the treatment in the non-exophthalmos group [960.8 (822.1, 1058.3) mm2 vs. 311.6 (164.6, 361.6) mm2; Z=-2.67, P=0.008]. All patients had no obvious local or systemic adverse reactions during the follow-up. The pathology reports showed vascular malformations in all 15 specimens obtained from the exophthalmos group, as well as vascular malformations in 41.0% (16/39) of specimens and venous lymphatic malformations in 59.0% (23/39) of specimens from the non-exophthalmos group. Thirty-nine patients had complete remission (67.2%), 19 patients had partial remission (32.8%), and the effective treatment rate was 100%. Conclusion: Bleomycin lavage combined with N-butyl-2-cyanoacrylate glue embolization can achieve good therapeutic effects on orbital vascular malformations.
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Affiliation(s)
- Y Y Li
- The Ophthalmology Division of Chinese PLA General Hospital, Beijing 100039, China
| | - X L Qu
- Department of Ophthalmology, First Affiliated Hospital of Shandong First Medical University, Jinan 250014, China
| | - R Ma
- The Ophthalmology Division of Chinese PLA General Hospital, Beijing 100039, China
| | - J Hu
- The Ophthalmology Division of Chinese PLA General Hospital, Beijing 100039, China
| | - Y Hei
- The Ophthalmology Division of Chinese PLA General Hospital, Beijing 100039, China
| | - W Q Xu
- The Ophthalmology Division of Chinese PLA General Hospital, Beijing 100039, China
| | - W Wu
- The Ophthalmology Division of Chinese PLA General Hospital, Beijing 100039, China
| | - Z Ding
- The Ophthalmology Division of Chinese PLA General Hospital, Beijing 100039, China
| | - X J Yang
- The Ophthalmology Division of Chinese PLA General Hospital, Beijing 100039, China
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16
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Chen T, Liu J, Ding Z. Integrated Analysis of Transcriptome in Interleukin-10 Treated Peripheral Blood Cell Reveal Conservative Differential Expressed Genes. Indian J Pharm Sci 2023. [DOI: 10.36468/pharmaceutical-sciences.1088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023] Open
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17
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Fridriksson B, Berndtson M, Hamnered H, Faeder E, Ding Z, Hedner J, Grote L. Beneficial effects of telemedicine-based follow up in sleep apnea - a randomized controlled multi-center trial. Sleep Med 2022. [DOI: 10.1016/j.sleep.2022.05.197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Wei X, Chu K, Adsetts JR, Li H, Kang X, Ding Z, Zhu M. Nanocluster Transformation Induced by SbF 6- Anions toward Boosting Photochemical Activities. J Am Chem Soc 2022; 144:20421-20433. [PMID: 36260434 DOI: 10.1021/jacs.2c08632] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The interactions between SbF6- and metal nanoclusters are of significance for customizing clusters from both structure and property aspects; however, the whole-segment monitoring of this customization remains challenging. In this work, by controlling the amount of introduced SbF6- anions, the step-by-step nanocluster evolutions from [Pt1Ag28(S-Adm)18(PPh3)4]Cl2 (Pt1Ag28-Cl) to [Pt1Ag28(S-Adm)18(PPh3)4](SbF6)2 (Pt1Ag28-SbF6) and then to [Pt1Ag30Cl1(S-Adm)18(PPh3)3](SbF6)3 (Pt1Ag30-SbF6) have been mapped out with X-ray crystallography, with which atomic-level SbF6- counterion effects in reconstructing and rearranging nanoclusters are determined. The structure-dependent optical properties, including optical absorption, photoluminescence, and electrochemiluminescence (ECL), of these nanoclusters are then explored. Notably, the Pt1Ag30-SbF6 nanocluster was ultrabright with a high phosphorescence quantum yield of 85% in N2-purged solutions, while Pt1Ag28 nanoclusters were fluorescent with weaker emission intensities. Furthermore, Pt1Ag30-SbF6 displayed superior ECL efficiency over Pt1Ag28-SbF6, which was rationalized by its increased effectively exposed reactive facets. Both Pt1Ag30-SbF6 and Pt1Ag28-SbF6 demonstrated unprecedented high absolute ECL quantum efficiencies at sub-micromolar concentrations. This work is of great significance for revealing the SbF6- counterion effects on the control of both structures and luminescent properties.
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Affiliation(s)
- Xiao Wei
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Institutes of Physical Science and Information Technology and Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui230601, China
| | - Kenneth Chu
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, LondonOntarioN6A 5B7, Canada
| | - Jonathan Ralph Adsetts
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, LondonOntarioN6A 5B7, Canada
| | - Hao Li
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Institutes of Physical Science and Information Technology and Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui230601, China
| | - Xi Kang
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Institutes of Physical Science and Information Technology and Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui230601, China
| | - Zhifeng Ding
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, LondonOntarioN6A 5B7, Canada
| | - Manzhou Zhu
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Institutes of Physical Science and Information Technology and Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui230601, China
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Zheng H, Wang QQ, Xiong LL, Yu Y, Fei J, Ding Z. [Comparison of time series and case-crossover analyses in environmental epidemiology]. Zhonghua Yu Fang Yi Xue Za Zhi 2022; 56:1446-1451. [PMID: 36274612 DOI: 10.3760/cma.j.cn112150-20220415-00375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Time-series and case-crossover are two main study designs in environmental epidemiology. However, due to the differences in design principles and model construction between the two analyses, the results of the two analyses may not be consistent. Herein, we examined the short-term effect of cold spells on cardiovascular mortality in Nanjing using both time series and case-crossover analyses, aiming to provide a basis for the selection of appropriate research design in environmental epidemiology.
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Affiliation(s)
- H Zheng
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - Q Q Wang
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - L L Xiong
- Nanjing Municipal Center for Disease Control and Prevention, Nanjing 210003, China
| | - Y Yu
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - J Fei
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - Z Ding
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
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20
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He S, Wang X, Xiang G, Lac K, Wang C, Wang S, Ding Z. Enhanced Electrochemiluminescence of A Macrocyclic Tetradentate Chelate Pt(II) Molecule through Its Collisional Interactions with the Electrode. Chem Asian J 2022. [DOI: 10.1002/asia.202200882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shuijian He
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials College of Materials Science and Engineering Nanjing Forestry University Nanjing 210037 China
- Department of Chemistry The University of Western Ontario London ON N6 A 5B7 Canada
| | - Xiang Wang
- Department of Chemistry Queen's University Kingston ON K7 L 3 N6 Canada
| | - Guiming Xiang
- Department of Chemistry The University of Western Ontario London ON N6 A 5B7 Canada
| | - Kevin Lac
- Department of Chemistry The University of Western Ontario London ON N6 A 5B7 Canada
| | - Changshui Wang
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials College of Materials Science and Engineering Nanjing Forestry University Nanjing 210037 China
| | - Suning Wang
- Department of Chemistry Queen's University Kingston ON K7 L 3 N6 Canada
| | - Zhifeng Ding
- Department of Chemistry Queen's University Kingston ON K7 L 3 N6 Canada
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21
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He S, Wang X, Xiang G, Lac K, Wang C, Ding Z. Enhanced Electrochemiluminescence of A Macrocyclic Tetradentate Chelate Pt(II) Molecule via Its Collisional Interactions with the Electrode. Chem Asian J 2022; 17:e202200727. [PMID: 35997551 DOI: 10.1002/asia.202200727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/22/2022] [Indexed: 11/11/2022]
Abstract
A macrocyclic tetradentate chelate Pt(II) molecule (Pt1) served as an excellent luminophore in electrochemiluminescence (ECL) processes. The blue ECL of Pt1/S2O82- coreactant system in N,N'-dimethylformamide was found to be 46 times higher than that of the Ru(bpy)2+/S2O82- system or 30 times higher than that of the 9,10-diphenylanthracene/S2O82- system. The unprecedented high ECL quantum efficiencies were caused by the cyclic generation of monomer excited states through collisional interactions of Pt1 molecules with the electrode at an elevated frequency. The ECL is tunable from bright blue to pure white by simply changing the solvent from N,N'-dimethylformamide to dichloromethane. The white ECL of Pt(II) molecule was reported for the first time and the mechanism was proposed to be the simultaneous emissions from the monomer excited state (blue) and excimer (red).
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Affiliation(s)
- Shuijian He
- Nanjing Forestry University, College of Materials Science and Engineering, CHINA
| | | | | | - Kevin Lac
- Western University, Chemistry, CANADA
| | - Changshui Wang
- Nanjing Forestry University, College of Materials Science and Engineering, CHINA
| | - Zhifeng Ding
- University of Western Ontario, Chemistry, 1151 Richmond St, N6A5B7, London, CANADA
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22
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Turnbull MJ, Yiu YM, Goldman M, Sham TK, Ding Z. Favorable Bonding and Band Structures of Cu 2ZnSnS 4 and CdS Films and Their Photovoltaic Interfaces. ACS Appl Mater Interfaces 2022; 14:32683-32695. [PMID: 35817012 DOI: 10.1021/acsami.2c06892] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Thin-film photovoltaic cells using Cu2ZnSnS4 (CZTS, p-type) have many advantages, such as high photoconversion, low cost, and great tunability with earth-abundant, nontoxic elements, all of which are necessary to be long-term contributors to next-generation solar energy harvesting. Accurate measurements of bonding and band structures of both the thin-film materials and their interfaces are paramount to designing the solar devices layer-by-layer. Here, finely tuned 1 μm thick CZTS films, 50 nm thick CdS layers (n-type), and their 1 μm/2 nm p-n junction were fabricated inexpensively using our previously studied methods and investigated extensively for maximizing the key interface in the CZTS solar devices. Synthesized bulk CZTS and CdS were analyzed for structural deviations and crystal defects using synchrotron-based (SR) X-ray absorption fine structure (XAFS) along with simulated XAFS patterns. The structural properties of the two materials were designed to favor photovoltaic activity. Interface valence band structures of the CZTS/CdS p-n junction were measured through SR X-ray photoelectron spectroscopy (SR-XPS) and compared with the ones simulated using density functional theory. A full band diagram was constructed from XPS of the bulk films and SR-XPS of the interface, providing guidelines in optimizing charge-carrier extraction from the CZTS absorber to CdS buffer layer. It turns out that a small spike-like interface in the conduction band overlap was formed, maintaining a strong internal bias, while favoring a small energy barrier to prevent large-scale recombination from occurring. A large open-circuit voltage was obtained in the preliminary solar cell devices built on the small spike-like interface.
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Affiliation(s)
- Matthew J Turnbull
- Department of Chemistry and Soochow University-Western University Centre for Synchrotron Radiation Research, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - Yun Mui Yiu
- Department of Chemistry and Soochow University-Western University Centre for Synchrotron Radiation Research, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - Maxwell Goldman
- Department of Chemistry and Soochow University-Western University Centre for Synchrotron Radiation Research, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - Tsun-Kong Sham
- Department of Chemistry and Soochow University-Western University Centre for Synchrotron Radiation Research, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - Zhifeng Ding
- Department of Chemistry and Soochow University-Western University Centre for Synchrotron Radiation Research, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
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23
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Gunawardene PN, Martin J, Wong JM, Ding Z, Corrigan JF, Workentin MS. Controlling the Structure, Properties and Surface Reactivity of Clickable Azide‐Functionalized Au
25
(SR)
18
Nanocluster Platforms Through Regioisomeric Ligand Modifications. Angew Chem Int Ed Engl 2022; 61:e202205194. [DOI: 10.1002/anie.202205194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Praveen N. Gunawardene
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research Western University London Ontario N6A 5B7 Canada
| | - Julia Martin
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research Western University London Ontario N6A 5B7 Canada
| | - Jonathan M. Wong
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research Western University London Ontario N6A 5B7 Canada
| | - Zhifeng Ding
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research Western University London Ontario N6A 5B7 Canada
| | - John F. Corrigan
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research Western University London Ontario N6A 5B7 Canada
| | - Mark S. Workentin
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research Western University London Ontario N6A 5B7 Canada
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24
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Qin X, Yang L, Wang X, Patel D, Chu K, Kelland L, Adsetts J, Zhang C, Workentin MS, Pagenkopf B, Ding Z. Correlating Structures to Electrochemiluminescence Efficiencies of Silole Compounds in Coreactant Systems. ChemElectroChem 2022. [DOI: 10.1002/celc.202200605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | | | - Xin Wang
- Western University Chemistry CANADA
| | | | | | | | - Jonathan Adsetts
- Western University Chemistry 1151 Richmond StreetChemistry N6A5B7 London CANADA
| | | | | | | | - Zhifeng Ding
- University of Western Ontario Chemistry 1151 Richmond St N6A5B7 London CANADA
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25
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Soussain C, Grommes C, Ward R, Peterson C, Cravets M, Mathias A, Sosa J, Kirby B, Ding Z, Yusuf I, Rose M, Steinberg M, Tun H. PB2096: A PHASE 1B/2 STUDY OF GB5121, A NOVEL, HIGHLY SELECTIVE, POTENT, AND CNS-PENETRANT BTK INHIBITOR FOR RELAPSED/REFRACTORY PRIMARY/SECONDARY CNS LYMPHOMA AND PRIMARY VITREORETINAL LYMPHOMA. Hemasphere 2022. [PMCID: PMC9428960 DOI: 10.1097/01.hs9.0000851216.47783.78] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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26
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Gunawardene PN, Martin J, Wong JM, Ding Z, Corrigan JF, Workentin MS. Controlling the Structure, Properties and Surface Reactivity of Clickable Azide‐Functionalized Au
25
(SR)
18
Nanocluster Platforms Through Regioisomeric Ligand Modifications. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Praveen N. Gunawardene
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research Western University London Ontario N6A 5B7 Canada
| | - Julia Martin
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research Western University London Ontario N6A 5B7 Canada
| | - Jonathan M. Wong
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research Western University London Ontario N6A 5B7 Canada
| | - Zhifeng Ding
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research Western University London Ontario N6A 5B7 Canada
| | - John F. Corrigan
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research Western University London Ontario N6A 5B7 Canada
| | - Mark S. Workentin
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research Western University London Ontario N6A 5B7 Canada
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27
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Yang L, Adsetts JR, Zhang R, Balónová B, Piqueras MT, Chu K, Zhang C, Zysman-Colman E, Blight BA, Ding Z. Determining absolute electrochemiluminescence efficiencies of two iridium complexes. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2021.115891] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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28
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Adsetts JR, Whitworth Z, Chu K, Yang L, Zhang C, Ding Z. Closely Following Equivalent Circuit Changes during Operation of Graphene Dot Light‐Emitting Electrochemical Cells**. ChemElectroChem 2022. [DOI: 10.1002/celc.202101512] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | | | | | | | - Zhifeng Ding
- University of Western Ontario Chemistry 1151 Richmond St N6A5B7 London CANADA
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29
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Hesari M, Ding Z. Identifying Highly Photoelectrochemical Active Sites of Two Au 21 Nanocluster Isomers toward Bright Near-Infrared Electrochemiluminescence. J Am Chem Soc 2021; 143:19474-19485. [PMID: 34775763 DOI: 10.1021/jacs.1c08877] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Thus far, no correlation between nanocluster structures and their electrochemiluminescence (ECL) has been identified. Herein, we report how face-centered-cubic and hexagonal close-packed structures of two Au21(SR)15 nanocluster isomers determine their chemical reactivity. The relationships were explored by means of ECL and photoluminescence spectroscopy. Both isomers reveal unprecedented ECL efficiencies in the near-infrared region, which are >10- and 270-fold higher than that of standard Ru(bpy)32+, respectively. Photoelectrochemical reactivity as well as ECL mechanisms were elucidated based on electrochemistry, spooling photoluminescence, and ECL spectroscopy, unfolding the three emission enhancement origins: (i) effectively exposed reactive facets available to undergo electron transfer reactions; (ii) individual excited-state regeneration loops; (iii) cascade generations of various exited states. Indeed, these discoveries will have immediate impacts on various applications including but not limited to single molecular detection as well as photochemistry and electrocatalysis toward clean photon-electron conversion processes such as light-harvesting and light-emitting technologies.
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Affiliation(s)
- Mahdi Hesari
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Zhifeng Ding
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
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30
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Hesari M, Ma H, Ding Z. Monitoring single Au 38 nanocluster reactions via electrochemiluminescence. Chem Sci 2021; 12:14540-14545. [PMID: 34881005 PMCID: PMC8580063 DOI: 10.1039/d1sc04018a] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 10/07/2021] [Indexed: 11/21/2022] Open
Abstract
Herein, we report for the first time single Au38 nanocluster reaction events of highly efficient electrochemiluminescence (ECL) with tri-n-propylamine radicals as a reductive co-reactant at the surface of an ultramicroelectrode (UME). The statistical analyses of individual reactions confirm stochastic single ones influenced by the applied potential.
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Affiliation(s)
- Mahdi Hesari
- Department of Chemistry, The University of Western Ontario London Ontario N6A 5B7 Canada
| | - Hui Ma
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Zhifeng Ding
- Department of Chemistry, The University of Western Ontario London Ontario N6A 5B7 Canada
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31
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Hesari M, Ding Z. Cover Feature: Efficient Near‐Infrared Electrochemiluminescence from Au
18
Nanoclusters (Chem. Eur. J. 60/2021). Chemistry 2021. [DOI: 10.1002/chem.202103606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Mahdi Hesari
- Department of Chemistry The University of Western Ontario 1151 Richmond St. London ON N6A 5B7 Canada
| | - Zhifeng Ding
- Department of Chemistry The University of Western Ontario 1151 Richmond St. London ON N6A 5B7 Canada
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32
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Abstract
Bright, near-infrared electrochemiluminescence (NIR-ECL) of Au18 nanoclusters is reported herein. Spooling ECL and photoluminescence spectroscopy were used to track and link NIR emissions at 832 and 848 nm to three emissive species, Au18 0 *, Au18 1+ * and Au18 2+ *, with a considerably high ECL efficiency of 5.5 relative to that of the gold standard Ru(bpy)3 2+ /TPrA (with 5-6 % reported ECL efficiency). The unprecedentedly high efficiency is due to the overlapped oxidation potentials of Au18 0 and tri-n-propylamine as co-reactant, the exposed facets of Au18 0 gold core, and electrocatalytic loops. These discoveries will add a new member to the efficient NIR-ECL gold nanoclusters family and bring more potential applications.
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Affiliation(s)
- Mahdi Hesari
- Department of Chemistry, The University of Western Ontario, 1151 Richmond St., London, ON N6A 5B7, Canada
| | - Zhifeng Ding
- Department of Chemistry, The University of Western Ontario, 1151 Richmond St., London, ON N6A 5B7, Canada
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33
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34
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Yang L, De-Jager CR, Adsetts JR, Chu K, Liu K, Zhang C, Ding Z. Analyzing Near-Infrared Electrochemiluminescence of Graphene Quantum Dots in Aqueous Media. Anal Chem 2021; 93:12409-12416. [PMID: 34464100 DOI: 10.1021/acs.analchem.1c02441] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Mechanisms of emissions, especially electrochemiluminescence (ECL), for graphene quantum dots (GQDs) are poorly understood, which makes near-infrared (NIR)-emitting GQDs difficult to create. To explore this poorly understood NIR ECL, two GQDs, nitrogen-doped GQDs (GQD-1) and nitrogen- and sulfur-doped ones (GQD-2), were prepared by a simple one-step solvothermal reaction with similar core structures but different surface states. The GQDs were analyzed by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy. Photoluminescence results, with a comparable quantum efficiency of 13% to strong luminophores in aqueous media, suggested a mechanism that the emission mainly depends on the core structure while slightly adjusted by the heteroatom doping. ECL of GQD-2 dispersed in aqueous media with K2S2O8 as the coreactant was measured by means of ECL-voltage curves and ECL spectroscopy, demonstrating strong NIR emissions between 680 and 870 nm, with a high ECL efficiency of 13% relative to that of the Ru(bpy)32+/K2S2O8 system. Interestingly, ECL is generated by surface excited states emitting light at a much longer wavelength in the NIR region. The easily prepared GQD-2 has several advantages such as low cost and quite strong NIR-ECL in aqueous media, with which wide applications in biodetection are anticipated.
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Affiliation(s)
- Liuqing Yang
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Cindy Rae De-Jager
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Jonathan Ralph Adsetts
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Kenneth Chu
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Kehan Liu
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Congyang Zhang
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Zhifeng Ding
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, Ontario N6A 5B7, Canada
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35
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Singh J, Hatcher S, Ku AA, Ding Z, Feng FY, Sharma RA, Pfister SX. Model Selection for the Preclinical Development of New Drug-Radiotherapy Combinations. Clin Oncol (R Coll Radiol) 2021; 33:694-704. [PMID: 34474951 DOI: 10.1016/j.clon.2021.08.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 07/13/2021] [Accepted: 08/11/2021] [Indexed: 12/12/2022]
Abstract
Radiotherapy plays an essential role in the treatment of more than half of all patients with cancer. In recent decades, advances in devices that deliver radiation and the development of treatment planning software have helped radiotherapy attain precise tumour targeting with minimal toxicity to surrounding tissues. Simultaneously, as more targeted drug therapies are being brought into the market, there has been significant interest in improving cure rates for cancer by adding drugs to radiotherapy to widen the therapeutic window, the difference between normal tissue toxicity and treatment efficacy. The development of new combination therapies will require judicious adaptation of preclinical models that are routinely used for traditional drug discovery. Here we highlight the strengths and weaknesses of each of these preclinical models and discuss how they can be used optimally to identify new and clinically beneficial drug-radiotherapy combinations.
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Affiliation(s)
- J Singh
- Global Translational Science, Varian, a Siemens Healthineers company, Palo Alto, California, USA
| | - S Hatcher
- Global Translational Science, Varian, a Siemens Healthineers company, Palo Alto, California, USA
| | - A A Ku
- Global Translational Science, Varian, a Siemens Healthineers company, Palo Alto, California, USA
| | - Z Ding
- Global Translational Science, Varian, a Siemens Healthineers company, Palo Alto, California, USA
| | - F Y Feng
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, California, USA; Division of Hematology and Oncology, Department of Medicine, University of California, San Francisco, California, USA; Department of Radiation Oncology, University of California, San Francisco, California, USA; Department of Urology, University of California, San Francisco, California, USA
| | - R A Sharma
- Global Translational Science, Varian, a Siemens Healthineers company, Palo Alto, California, USA; UCL Cancer Institute, University College London, London, UK
| | - S X Pfister
- Global Translational Science, Varian, a Siemens Healthineers company, Palo Alto, California, USA.
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36
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Chen M, Lu SM, Peng YY, Ding Z, Long YT. Tracking the Electrocatalytic Activity of a Single Palladium Nanoparticle for the Hydrogen Evolution Reaction. Chemistry 2021; 27:11799-11803. [PMID: 34101910 DOI: 10.1002/chem.202101263] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Indexed: 01/07/2023]
Abstract
The nanoparticle-based electrocatalysts' performance is directly related to their working conditions. In general, a number of nanoparticles are uncontrollably fixed on a millimetre-sized electrode for electrochemical measurements. However, it is hard to reveal the maximum electrocatalytic activity owing to the aggregation and detachment of nanoparticles on the electrode surface. To solve this problem, here, we take the hydrogen evolution reaction (HER) catalyzed by palladium nanoparticles (Pd NPs) as a model system to track the electrocatalytic activity of single Pd NPs by stochastic collision electrochemistry and ensemble electrochemistry, respectively. Compared with the nanoparticle fixed working condition, Pd NPs in the nanoparticle diffused working condition results in a 2-5 orders magnitude enhancement of electrocatalytic activity for HER at various bias potential. Stochastic collision electrochemistry with high temporal resolution gives further insights into the accurate study of NPs' electrocatalytic performance, enabling to dramatically enhance electrocatalytic efficiency.
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Affiliation(s)
- Mengjie Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
| | - Si-Min Lu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
| | - Yue-Yi Peng
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
| | - Zhifeng Ding
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, ON N6A 5B7, Canada
| | - Yi-Tao Long
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
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37
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Adsetts JR, Chu K, Hesari M, Ma J, Ding Z. Absolute Electrochemiluminescence Efficiency Quantification Strategy Exemplified with Ru(bpy) 32+ in the Annihilation Pathway. Anal Chem 2021; 93:11626-11633. [PMID: 34387457 DOI: 10.1021/acs.analchem.1c02403] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
This work presents a thorough guide to procedures for absolute electrochemiluminescence (ECL) quantum efficiency (ΦECL) measurements, which if employed effectively should raise the research impact of ECL studies for any luminophore. Absolute measurements are not currently employed in ECL research. Instead, ECL efficiencies have been determined relative to Ru(bpy)32+ under similar conditions, regardless of whether the conditions are favorable for Ru(bpy)32+ emissions or not. In fact, the most cited Ru(bpy)32+ ΦECL is from the pioneering work by the Bard research group in 1973 by means of a rotating ring-disk electrode revolving at 52 rotations per second measured with a silicon photodiode. Our presented technique uses a common disk electrode, spectrometer, and photomultiplier tube to measure the ΦECL. The more common light detection hardware and electrodes combined with an in-depth calculation walkthrough will provide ECL researchers the necessary tools to implement ΦECL measurement procedures in their own laboratories. Following a facile instrument setup and calculation, a systematic study of Ru(bpy)32+ ΦECL finds comparable results to those performed by Bard and co-workers.
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Affiliation(s)
- Jonathan R Adsetts
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - Kenneth Chu
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - Mahdi Hesari
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - Jing Ma
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - Zhifeng Ding
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
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38
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Chen Y, Lin J, Zhang R, He S, Ding Z, Ding L. Electrochemiluminescence of water-dispersed nitrogen and sulfur doped carbon dots synthesized from amino acids. Analyst 2021; 146:5287-5293. [PMID: 34338251 DOI: 10.1039/d1an00991e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A facile one-pot hydrothermal approach for synthesizing water-dispersed nitrogen and sulfur doped carbon dots (NS-CDs) with high luminescence quantum yield was explored, using cysteine and tryptophan as precursors. The NS-CDs were characterized by means of FT-IR spectroscopy, XRD, TEM, etc. It was found that the absolute photoluminescence quantum yield (QY) of the NS-CDs determined with an integrating sphere can reach up to 73%, with an average decay time of 17.06 ns. Electrochemiluminescence (ECL) behaviors and mechanisms of the NS-CDs/K2S2O8 coreactant system were investigated. When the working electrode was modified with the prepared NS-CDs, the ECL efficiency of the NS-CDs with K2S2O8 was 24%, relative to Ru(bpy)3Cl2/K2S2O8. This work shows great potential for the NS-CDs to be used in bioanalytical applications.
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Affiliation(s)
- Yanhua Chen
- College of Chemistry, Jilin University, Changchun 130012, PR China.
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39
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Liang J, Hu H, Ding Z, Lie G, Zhou Z, Singh PB, Zhang Z, Ji S. Climate-driven elevational variation in range sizes of vascular plants in the central Himalayas: A supporting case for Rapoport's rule. Ecol Evol 2021; 11:9385-9395. [PMID: 34306629 PMCID: PMC8293715 DOI: 10.1002/ece3.7744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 04/23/2021] [Accepted: 05/11/2021] [Indexed: 11/12/2022] Open
Abstract
A fundamental yet controversial topic in biogeography is how and why species range sizes vary along spatial gradients. To advance our understanding of these questions and to provide insights into biological conservation, we assessed elevational variations in the range sizes of vascular plants with different life forms and biogeographical affinities and explored the main drivers underlying these variations in the longest valley in China's Himalayas, the Gyirong Valley. Elevational range sizes of vascular plants were documented in 96 sampling plots along an elevational gradient ranging from 1,800 to 5,400 m above sea level. We assessed the elevational variations in range size by averaging the range sizes of all recorded species within each sampling plot. We then related the range size to climate, disturbance, and the mid-domain effect and explored the relative importance of these factors in explaining the range size variations using the Random Forest model. A total of 545 vascular plants were recorded in the sampling plots along the elevational gradient. Of these, 158, 387, 337, and 112 were woody, herbaceous, temperate, and tropical species, respectively. The range size of each group of vascular plants exhibited uniform increasing trends along the elevational gradient, which was consistent with the prediction of Rapoport's rule. Climate was the main driver of the increasing trends of vascular plant range sizes in the Gyirong Valley. The climate variability hypothesis and mean climate condition hypothesis could both explain the elevation-range size relationships. Our results reinforce the previous notion that Rapoport's rule applies to regions where the influence of climate is the most pronounced, and call for close attention to the impact of climate change to prevent species range contraction and even extinction due to global warming.
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Affiliation(s)
- Jianchao Liang
- Laboratory of Systematic Evolution and Biogeography of Woody PlantsSchool of Ecology and Nature ConservationBeijing Forestry UniversityBeijingChina
- Guangdong Key Laboratory of Animal Conservation and Resource UtilizationGuangdong Public Laboratory of Wild Animal Conservation and UtilizationInstitute of ZoologyGuangdong Academy of SciencesGuangzhouChina
| | - Huijian Hu
- Guangdong Key Laboratory of Animal Conservation and Resource UtilizationGuangdong Public Laboratory of Wild Animal Conservation and UtilizationInstitute of ZoologyGuangdong Academy of SciencesGuangzhouChina
| | - Zhifeng Ding
- Guangdong Key Laboratory of Animal Conservation and Resource UtilizationGuangdong Public Laboratory of Wild Animal Conservation and UtilizationInstitute of ZoologyGuangdong Academy of SciencesGuangzhouChina
| | - Ganwen Lie
- Guangdong Eco‐Engineering PolytechnicGuangzhouChina
| | - Zhixin Zhou
- Guangdong Key Laboratory of Animal Conservation and Resource UtilizationGuangdong Public Laboratory of Wild Animal Conservation and UtilizationInstitute of ZoologyGuangdong Academy of SciencesGuangzhouChina
| | - Paras Bikram Singh
- Guangdong Key Laboratory of Animal Conservation and Resource UtilizationGuangdong Public Laboratory of Wild Animal Conservation and UtilizationInstitute of ZoologyGuangdong Academy of SciencesGuangzhouChina
- Biodiversity Conservation Society NepalLalitpurNepal
| | - Zhixiang Zhang
- Laboratory of Systematic Evolution and Biogeography of Woody PlantsSchool of Ecology and Nature ConservationBeijing Forestry UniversityBeijingChina
- Museum of Beijing Forestry UniversityBeijingChina
| | - Shengnan Ji
- State Environmental Protection Key Laboratory of Regional Ecological Processes and Functions AssessmentChinese Research Academy of Environmental SciencesBeijingChina
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Xu CY, Ye HW, Chen B, Wu YF, Cao Z, Ding Z, Yao YP, Gao Y, Li J, Zhu JJ, He S. Analysis of risk factors and prognosis of post-stroke pulmonary infection in integrated ICU. Eur Rev Med Pharmacol Sci 2021; 25:856-865. [PMID: 33577040 DOI: 10.26355/eurrev_202101_24654] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE The incidence of SAP (stroke-associated pneumonia) is high in integrated ICU (Intensive Care Unit), and it might result in sepsis, which exacerbates the clinical outcome and increases mortality. It is necessary to investigate the epidemiological features of post-stroke infection and sepsis, identify the risk factors and analyze the prognosis. PATIENTS AND METHODS We retrospectively analyzed the data of 329 patients with cerebral infarction or cerebral hemorrhage, from seven tertiary university hospitals in Suzhou, Jiangsu Province, between January 1, 2016, and December 31, 2016. Basic demographic and clinical data including common health evaluation, stroke severity, microbiological parameters, surgical interventions and treatments were recorded for the analysis. SAP was diagnosed according to the criteria and recommendation from American Heart Association (AHA). RESULTS 188 (66.4%) patients suffered pneumonia, 124 patients were diagnosed as SAP. Compared with SAP, patients with non-SAP pulmonary infection had prolonged mechanical ventilation time, prolonged central venous catheter indwelling time, and higher incidence of sepsis (17.7% vs. 48.4%). 53 patients (18.7%) developed sepsis during hospitalization, whose mortality rate during hospitalization and the occurrence of neurologic dysfunction at 3 months were significantly increased (p<0.05). 130 positive results of sputum cultures were found. The detected pathogens were mainly gram-negative bacteria. The pathogenic detection rate of non-SAP patients with pulmonary infection was higher (78.1%). The in-hospital mortality was 16.3% and the related risk factors were higher NIHSS score at admission, lower GCS score at admission, pulmonary infection (especially non-SAP pulmonary infection) and sepsis during hospitalization. CONCLUSIONS The incidence of pulmonary infection after stroke in the integrated ICU is high, and it is easy to be complicated with sepsis, prolonging the mechanical ventilation time, central venous catheter indwelling time and hospitalization time, and the prognosis of long-term neurological function is relatively poor. The definition of stroke-associated pneumonia has implications for the classification of clinical infections, the prediction of possible pathogenic pathogens, and the guidance of anti-infective treatment.
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Affiliation(s)
- C-Y Xu
- Department of Emergency Medicine, Changshu Hospital Affiliated to Soochow University, the First People's Hospital of Changshu, Changshu, Jiangsu Province, China.
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Ding Z, Liu SJ, Liu XW, Ma Q, Qiao Z. MiR-16 inhibits proliferation of cervical cancer cells by regulating KRAS. Eur Rev Med Pharmacol Sci 2021; 24:10419-10425. [PMID: 33155198 DOI: 10.26355/eurrev_202010_23393] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE The aim of this study was to explore the effects of micro ribonucleic acid (miR)-16 on the proliferation and apoptosis of cervical cancer (CC) cells and its related regulatory mechanism. MATERIALS AND METHODS The downstream regulatory targets of miR-16 were analyzed based on the miRNA online database. HCC94 cells were selected as experimental objects. Subsequently, the cells were transfected with miR-16 mimic (miR-16 mimic group), miR-16 small interfering RNA (siRNA) (miR-16 siRNA group) and only Lipofectamine 2000 transfection reagent [blank control group and miR-16 normal control (NC) group]. The expression level of miR-16 in HCC94 cells was measured via quantitative reverse transcription-polymerase chain reaction (qRT-PCR). Cell counting kit-8 (CCK-8) assay, 5-Ethynyl-2'-deoxyuridine (EdU) staining assay and flow cytometry were then conducted to detect the effects of miR-16 on the viability, proliferation and apoptosis of HCC94 cells, respectively. Additionally, the effect of miR-16 on the protein expression level of Kirsten rat sarcoma viral oncogene homolog (KRAS) in HCC94 cells was determined via Western blotting. RESULTS MiRNA online database analysis showed that KRAS was the downstream target of miR-16. Compared with miR-16 NC group, the viability and proliferation ability of HCC94 cells increased significantly in miR-16 siRNA group but decreased significantly in miR-16 mimic group (p<0.05). However, the apoptosis rate evidently declined in miR-16 siRNA group while increased remarkably in miR-16 mimic group (p<0.05). In addition, the protein expression level of KRAS in HCC94 cells was significantly higher in miR-16 siRNA group but significantly lower in miR-16 mimic group when compared with miR-16 NC group (p<0.05). CONCLUSIONS MiR-16 is lowly expressed in HCC94 cells. Moreover, highly expressed miR-16 represses the viability and proliferation of HCC94 cells and promotes their apoptosis by targeted regulation on KRAS.
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Affiliation(s)
- Z Ding
- Department of Oncology, Affiliated Hospital of Jining Medical University, Jining, Jining, China.
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Pan T, Ding Z, Yan J, Zhao P. Comment on: Randomized clinical trial on closure versus non-closure of mesenteric defects during laparoscopic gastric bypass surgery. Br J Surg 2021; 108:e276. [PMID: 34009310 DOI: 10.1093/bjs/znab144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 04/06/2021] [Indexed: 11/13/2022]
Affiliation(s)
- T Pan
- Department of Gastrointestinal Surgery, Sichuan Cancer Hospital & Research Institute, School of Medicine, University of Electronic Science and Technology of China (UESTC), Chengdu, China
| | - Z Ding
- Department of Gastrointestinal Surgery, Sichuan Cancer Hospital & Research Institute, School of Medicine, University of Electronic Science and Technology of China (UESTC), Chengdu, China
| | - J Yan
- Department of Gastrointestinal Surgery, Sichuan Cancer Hospital & Research Institute, School of Medicine, University of Electronic Science and Technology of China (UESTC), Chengdu, China
| | - P Zhao
- Department of Gastrointestinal Surgery, Sichuan Cancer Hospital & Research Institute, School of Medicine, University of Electronic Science and Technology of China (UESTC), Chengdu, China
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Hesari M, Ding Z. Spooling electrochemiluminescence spectroscopy: development, applications and beyond. Nat Protoc 2021; 16:2109-2130. [PMID: 33731962 DOI: 10.1038/s41596-020-00486-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 12/15/2020] [Indexed: 12/22/2022]
Abstract
One of the most widely used techniques to generate light through an efficient electron transfer is called electrochemiluminescence, or electrogenerated chemiluminescence (ECL). ECL mechanisms can be explored via 'spooling spectroscopy' in which individual ECL spectra showing emitted light are collected continuously during a potentiodynamic course. The obtained spectra are spooled together and plotted along the applied potential axis; because the potential sweep occurs at a defined rate, this axis is directly proportional to time. Any changes in the emission spectra can be correlated to the corresponding potentials and/or times, leading to a deeper understanding of the mechanism for light generation-information that can be used for efficiently maximizing ECL intensities. The formation of intermediates and excited states can also be tracked, which is crucial to interrogating and drawing electron transfer pathways (i.e., understanding the chemical reaction mechanism). Spooling spectroscopy is not limited to ECL; we also include instructions for the use of related methodologies, such as spooling photoluminescence spectroscopy during an electrolysis procedure, which can be easily set up. The total time required to complete the protocol is ~49 h, from making electrodes and an ECL cell, fabricating light-tight housing, to setting up instruments. Preparing the lab for an individual experiment (making an electrolyte solution of a targeted luminophore, cooling down the CCD camera, calibrating the spectrometer and surveying electrochemistry) takes ~1 h 15 min, and performing the spooling ECL spectroscopy experiment itself requires ~10 min.
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Affiliation(s)
- Mahdi Hesari
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada.
| | - Zhifeng Ding
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada.
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Ding Z, Sherlock M, Zachos M. A184 INCIDENCE OF VENOUS THROMBOTIC EVENTS AND RISK FACTORS IN CHILDREN HOSPITALIZED WITH INFLAMMATORY BOWEL DISEASE: A RETROSPECTIVE, CASE-CONTROL STUDY. J Can Assoc Gastroenterol 2021. [DOI: 10.1093/jcag/gwab002.182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Limited research has been published to describe the incidence of venous thromboembolism (VTE) and relevant risk factors in Canadian children with inflammatory bowel disease (IBD).
Aims
The present study aimed to investigate the incidence of VTE amongst hospitalized pediatric IBD patients over a 10-year period and identify risk factors for the development of VTE.
Methods
A retrospective, matched case-control study was performed at McMaster Children’s Hospital. Hospitalized pediatric patients with IBD (<18 years old) from September 2009 to August 2020 were selected. Inpatient data was extracted from the medical record database, including baseline demographic data, thromboembolic events and potential risk factors for VTE.
Results
There were 890 hospitalizations of IBD patients during the study period. 15 (1.69%) were diagnosed with a VTE, including 4 males and 11 females (mean age 13.4±2.9 years old). 12 ulcerative colitis (UC) (80%) and 3 Crohn’s disease (CD) (20%) hospitalizations were comprised in the VTE group. There was a significant difference in VTE rate between females (2.7%) and males (0.8%) (P = 0.03). The VTE rate in the UC group (4.2%) was significantly higher than in the CD group (0.6%) (P = 0.001). The incidence of VTE amongst hospitalized IBD patients did not vary over the 10-year period (P = 0.496). Length of stay in hospital, albumin level and central venous catheter were shown to be significantly different, although they were not identified as independent risk factors (P >0 .05). Of the 15 hospitalizations with VTE, 6/15 (40%) were superficial VTEs in the extremities and 9/15 (60%) had a deep vein thrombosis (DVT) including 6 in the extremities and 3 in the abdomen. VTEs were associated with a peripheral line in 7 patients and with a PICC line in 4 hospitalizations. 2 of 9 (22%) with extremity DVT developed symptomatic pulmonary embolism. An inherited thrombotic condition was identified in 2 of 15 with VTEs. 12/15 (80%) with VTEs were symptomatic and all VTE related symptoms happened in patients with extremity thrombosis and pulmonary embolism. 7 of 15 (47%) VTEs were treated with anticoagulation therapy for 1–6 months. VTE related symptoms and repeat imaging tests significantly improved, and no patient developed a bleeding complication as a result of treatment.
Conclusions
The VTE rate in pediatric IBD patients was relatively low at McMaster Children’s hospital. Children with VTE were disproportionately females with ulcerative colitis compared with children with no VTE. Central venous line insertion may be correlated with the risk for VTE in children with IBD. Most VTEs and related symptoms happened in patients with extremity thrombosis and secondary pulmonary embolus. Anticoagulation therapy in children with IBD with active disease appears to be safe.
Funding Agencies
Kids Dig Health Funding from McMaster Children’s Hospital, McMaster University
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Affiliation(s)
- Z Ding
- Division of Gastroenterology, Hepatology & Nutrition, McMaster Children’s Hospital, Hamilton, ON, Canada
| | - M Sherlock
- Division of Gastroenterology, Hepatology & Nutrition, McMaster Children’s Hospital, Hamilton, ON, Canada
| | - M Zachos
- Division of Gastroenterology, Hepatology & Nutrition, McMaster Children’s Hospital, Hamilton, ON, Canada
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Guo F, Liu Y, Ding Z, Zhang C, Liu Z, Fan J. Supplemental iodine-containing prenatal multivitamins use and the potential effects on pregnancy outcomes in a mildly iodine-deficient region. J Endocrinol Invest 2021; 44:443-452. [PMID: 32514901 DOI: 10.1007/s40618-020-01321-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 06/01/2020] [Indexed: 10/24/2022]
Abstract
PURPOSE The use and contribution of prenatal multivitamins (PMV) as iodine source for pregnant women in China, especially in mildly iodine-deficient region, have not been well studied. This study aimed to explore the association between PMV intake during pregnancy and thyroid function in mothers and newborns. METHODS We performed a study involving women with a history of taking PMV during pregnancy between January 2013 and October 2015, in Shanghai, a mildly iodine-deficient region. Maternal thyroid function in early and late pregnancy, and neonatal TSH on postnatal d 3 were obtained from medical records. We compared the outcomes in pregnant women who took exclusively iodine-containing PMV (I + PMV) with those who took exclusively non-contained PMV (I- PMV). Propensity score matching (PSM) was used to identify women with similar baseline characteristics. RESULTS After PSM, 1280 women in I + PMV and 2560 in I- PMV had similar propensity scores and were included in the analyses. Introduction of I + PMV to women was associated with slightly higher maternal thyroid hormone production (higher maternal FT4, p = 0.01, non-significantly lower TSH, p = 0.79) and lower neonatal TSH levels (p < 0.0001). The frequency of adverse pregnancy outcomes or thyroid dysfunctions did not differ between groups in late pregnancy. Mothers received I + PMV (0.2 SD) had a stronger association of maternal TSH with neonatal TSH than those who received I- PMV (0.1 SD). These effects were only shown in TPOAb-negative mothers, not in TPOAb-positive mothers. CONCLUSION TPOAb-positive women display an impaired iodine transport in thyroid and placenta, and this may explain the lack of changes in maternal and neonatal thyroid parameters with I + PMV supplementation in these women. This phenomenon might suggest that these women require different iodine doses or treatment approach in comparison with TPOAb-negative women.
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Affiliation(s)
- F Guo
- Obstetrical Department, School of Medicine, The International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University, 910 Hengshan Rd, Shanghai, China
- Shanghai Key Laboratory of Embryo Original Diseases, Shanghai, China
| | - Y Liu
- Obstetrical Department, School of Medicine, The International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University, 910 Hengshan Rd, Shanghai, China
- Shanghai Key Laboratory of Embryo Original Diseases, Shanghai, China
| | - Z Ding
- Obstetrical Department, School of Medicine, The International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University, 910 Hengshan Rd, Shanghai, China
- Shanghai Key Laboratory of Embryo Original Diseases, Shanghai, China
| | - C Zhang
- Obstetrical Department, School of Medicine, The International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University, 910 Hengshan Rd, Shanghai, China
- Shanghai Key Laboratory of Embryo Original Diseases, Shanghai, China
- Shanghai Municipal Key Clinical Specialty, Shanghai, China
| | - Z Liu
- Obstetrical Department, School of Medicine, The International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University, 910 Hengshan Rd, Shanghai, China
- Shanghai Key Laboratory of Embryo Original Diseases, Shanghai, China
- Shanghai Municipal Key Clinical Specialty, Shanghai, China
| | - J Fan
- Obstetrical Department, School of Medicine, The International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University, 910 Hengshan Rd, Shanghai, China.
- Shanghai Key Laboratory of Embryo Original Diseases, Shanghai, China.
- Shanghai Municipal Key Clinical Specialty, Shanghai, China.
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Zhou L, Wei H, Ge Y, Ding Z, Shi H. [Consistency of effective orifice area of prosthetic mitral valve estimated using 2-dimensional and 3-dimensional transesophageal echocardiography]. Nan Fang Yi Ke Da Xue Xue Bao 2021; 41:238-242. [PMID: 33624597 DOI: 10.12122/j.issn.1673-4254.2021.02.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To analyze the consistency of effective orifice area (EOA) of prosthetic mitral valve estimated using 2- dimensional (2D) and 3-dimensional (3D) transesophageal echocardiography (TEE). OBJECTIVE This study was conducted among 34 patients undergoing mitral valve replacement surgery in Nanjing First Hospital between March and June in 2019. The diameter of the left ventricular outflow tract (LVOT) measured by 2D-TEE was used to calculate the cross sectional area of LVOT (CSALVOT). In 3D-TEE method, LVOT area was measured directly by planimetry on an enface view. The EOAs of the prosthetic mitral valve were calculated for both methods using the continuity equation. Bland-Altman plot consistency test was used to analyze the consistency between the two sets of EOA results, and linear regression analysis was used to analyze their correlation. OBJECTIVE The EOA of the prosthetic mitral valve differed significantly between 2D method and 3D method (2.22±0.71 cm2 vs 2.35±0.70 cm2, P < 0.001) with a mean difference of -0.14±0.20 cm2 and 95% coherence boundaries of (-0.53, 0.25 cm2). The regression equation for EOA-3D and EOA-2D is y=0.27 + 0.94x, showing a good correlation between the two methods. OBJECTIVE EOA estimation of the prosthetic mitral valve using 2D and 3D TEE has a good consistency, and the results estimated by the 2D method are slightly lower by about 6% than those by the 3D method.
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Affiliation(s)
- L Zhou
- Department of Anesthesiology, Changzhou Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, Changzhou 213003, China
| | - H Wei
- Department of Anesthesiology, Nanjing First Hospital Affiliated to Nanjing Medical University, Nanjing 210006, China
| | - Y Ge
- Department of Anesthesiology, Nanjing First Hospital Affiliated to Nanjing Medical University, Nanjing 210006, China
| | - Z Ding
- Department of Anesthesiology, First Affiliated Hospital to Nanjing Medical University, Nanjing 210029, China
| | - H Shi
- Department of Anesthesiology, Nanjing First Hospital Affiliated to Nanjing Medical University, Nanjing 210006, China
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Adsetts JR, Ding Z. Film Electrochemiluminescence Controlled by Interfacial Reactions Along with Aggregation‐, Matrix‐Coordination‐, and Crystallization‐Induced Emissions. Chempluschem 2021; 86:155-165. [DOI: 10.1002/cplu.202000745] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/28/2020] [Indexed: 12/20/2022]
Affiliation(s)
- Jonathan R. Adsetts
- Department of Chemistry The University of Western Ontario 1161 Richmond Street London ON N6 A 5B7 Canada
| | - Zhifeng Ding
- Department of Chemistry The University of Western Ontario 1161 Richmond Street London ON N6 A 5B7 Canada
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Liang J, Ding Z, Lie G, Zhou Z, Singh PB, Zhang Z, Hu H. Species richness patterns of vascular plants and their drivers along an elevational gradient in the central Himalayas. Glob Ecol Conserv 2020. [DOI: 10.1016/j.gecco.2020.e01279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Adsetts JR, Hoesterey S, Gao C, Love DA, Ding Z. Electrochemiluminescence and Photoluminescence of Carbon Quantum Dots Controlled by Aggregation-Induced Emission, Aggregation-Caused Quenching, and Interfacial Reactions. Langmuir 2020; 36:14432-14442. [PMID: 33207119 DOI: 10.1021/acs.langmuir.0c02886] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Carbon quantum dots (CQDs) show promise in optoelectronics as a light emitter due to simple synthesis, biocompatibility and strong tunable light emissions. However, CQDs commonly suffer from aggregation caused quenching (ACQ), inhibiting the full potential of these light emitters. Studies into different ideal light emitters have shown enhancements when converting common ACQ effects to aggregation induced emission (AIE) effects. We report CQD synthesis using citric acid and high/low thiourea concentrations, or sample 2/1. These two CQDs exhibited AIE and ACQ PL effects, respectively. CQD characterizations and photoluminescence interrogations of CQD films and solutions revealed that these unique emission mechanisms likely arose from different S incorporations into the CQDs. Furthermore, it was discovered that sample 2 emitted electrochemiluminescence (ECL) more intensely than sample 1 in a homogenous solution with S2O82- as a coreactant, due to aggregation and interactions of CQD species in solution. Very interestingly, sample 1's CQD film|S2O82- system achieved an ECL efficiency of 26% and emitted roughly 26 times more efficiently than sample 2 in the same conditions. Predominant interfacial reactions and surface state emission produced intense white light with a correlated color temperature of 2000 K. Spooling ECL spectroscopy was utilized to investigate emission mechanisms. Sample 2's CQD film|TPrA system had four times higher ECL intensity than that of sample 1, most likely due to π-cation interactions leading to a strong CQD•+ stability, thereby, enhancing ECL. It is anticipated that ECL enhancement of CQD films or solutions by means of AIE will lead to wide CQD optoelectronic applications.
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Affiliation(s)
- Jonathan Ralph Adsetts
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - Salena Hoesterey
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - Chenjun Gao
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - David A Love
- Rosstech Signal Inc., 71 15th Line South, Orillia, Ontario L3 V 6H1, Canada
| | - Zhifeng Ding
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
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Yang L, Hendsbee AD, Xue Q, He S, De-Jager CR, Xie G, Welch GC, Ding Z. Atomic Precision Graphene Model Compound for Bright Electrochemiluminescence and Organic Light-Emitting Diodes. ACS Appl Mater Interfaces 2020; 12:51736-51743. [PMID: 33155464 DOI: 10.1021/acsami.0c16238] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
An N-annulated perylene diimide dimer, tPDI2N-hex, a graphene model compound with atomic precision, was investigated for luminescence applications. Electrochemiluminescence (ECL) of tPDI2N-hex was studied with tri-n-propylamine (TPrA) as a reducing coreactant. ECL-voltage curves along with spooling ECL spectra provided details of light generation mechanisms. The relative ECL quantum efficiency of the Ru(bpy)3(PF6)2/TPrA system was calculated to be 64%, which is superior to that of many other organic molecules because of the desired excited state in the absence of surface states. An organic light-emitting diode (OLED) fabricated with tPDI2N-hex displayed bright orange-red emission with a low color temperature, which is very desirable. It is plausible that the sterically constrained and thus orthogonal aromatic moieties in the tPDI2N-hex structure, with atomic precision graphene layer characteristics, lead to the excellent luminescence performances. The ECL and OLED studies of tPDI2N-hex showcase great application potentials of tPDI2N-hex in both solution-based ECL probes and solid-state light devices.
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Affiliation(s)
- Liuqing Yang
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - Arthur D Hendsbee
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada
| | - Qin Xue
- Sauvage Center for Molecular Sciences, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan 430072, China
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Shuijian He
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - Cindy R De-Jager
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - Guohua Xie
- Sauvage Center for Molecular Sciences, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan 430072, China
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Gregory C Welch
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada
| | - Zhifeng Ding
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
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