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Shi J, Wang S, Yao J, Cui M, Hu B, Wang J, Li F, Wang S, Tong R, Li M, Song C, Wan R, Jiao J, Zheng X. Ultrasound treatment alleviates external pericarp browning and improves fruit quality of pomegranate during storage. J Sci Food Agric 2024; 104:391-399. [PMID: 37598393 DOI: 10.1002/jsfa.12930] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 08/12/2023] [Accepted: 08/21/2023] [Indexed: 08/22/2023]
Abstract
BACKGROUND Ultrasound treatment has a beneficial role in horticultural production from harvest to consumption. The quality traits and microbiological load in pomegranate fruit were explored during 30 days' storage at 20 °C after 10 min and 30 min ultrasound treatments. RESULTS Ultrasound treatment significantly reduced the microbiological load during storage, providing a relatively clean and suitable storage environment. This was especially true for the 30 min treatment, which also maintained relatively lower weight loss and kept the browning rate below 5% during storage. Meanwhile, the fruit treated with ultrasound had higher ascorbic acid and anthocyanin content, which provided better antibacterial properties and higher nutraceutical properties until the end of storage. The 30 min ultrasound treatment significantly delayed the decrease in catalase (CAT) enzyme activity and the increase in peroxidase (POD) enzyme activity. Combined with weighted gene co-expression network analysis (WGCNA), and correlation analysis, color indicators and antioxidant activity induced by ultrasound treatment were responsible for the relatively higher fruit quality of pomegranate. CONCLUSION Ultrasound treatment can improve the sensory quality and nutritional characteristics of pomegranate fruits during storage, and reduce the microbiological load. Ultrasound for 30 min was better than 10 min for prolonging the storage life of pomegranate. Our results will provide valuable information for ultrasound application in other horticultural products. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Jiangli Shi
- Department of Fruit Trees, College of Horticulture, College of Horticulture of Henan Agricultural University, Zhengzhou, P. R. China
| | - Sen Wang
- Department of Fruit Trees, College of Horticulture, College of Horticulture of Henan Agricultural University, Zhengzhou, P. R. China
| | - Jianan Yao
- Department of Fruit Trees, College of Horticulture, College of Horticulture of Henan Agricultural University, Zhengzhou, P. R. China
| | - Mengyi Cui
- Department of Fruit Trees, College of Horticulture, College of Horticulture of Henan Agricultural University, Zhengzhou, P. R. China
| | - Bingqian Hu
- Department of Fruit Trees, College of Horticulture, College of Horticulture of Henan Agricultural University, Zhengzhou, P. R. China
| | - Jing Wang
- Department of Fruit Trees, College of Horticulture, College of Horticulture of Henan Agricultural University, Zhengzhou, P. R. China
| | - Fan Li
- Department of Fruit Trees, College of Horticulture, College of Horticulture of Henan Agricultural University, Zhengzhou, P. R. China
| | - Sa Wang
- Department of Fruit Trees, College of Horticulture, College of Horticulture of Henan Agricultural University, Zhengzhou, P. R. China
| | - Ruiran Tong
- Department of Fruit Trees, College of Horticulture, College of Horticulture of Henan Agricultural University, Zhengzhou, P. R. China
| | - Ming Li
- Department of Fruit Trees, College of Horticulture, College of Horticulture of Henan Agricultural University, Zhengzhou, P. R. China
| | - Chunhui Song
- Department of Fruit Trees, College of Horticulture, College of Horticulture of Henan Agricultural University, Zhengzhou, P. R. China
| | - Ran Wan
- Department of Fruit Trees, College of Horticulture, College of Horticulture of Henan Agricultural University, Zhengzhou, P. R. China
| | - Jian Jiao
- Department of Fruit Trees, College of Horticulture, College of Horticulture of Henan Agricultural University, Zhengzhou, P. R. China
| | - Xianbo Zheng
- Department of Fruit Trees, College of Horticulture, College of Horticulture of Henan Agricultural University, Zhengzhou, P. R. China
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Wang S, Cheng Y, Huang W, Dou M, Shao H, Yao M, Ding K, Ye T, Zhou R, Li S, Chen Y. The Zn Vacancy-Mediated De-Accumulation Based Process for Hydrogen Production Performance Promotion of 1D Zn─Cd─S Nanorods. Small 2023:e2306447. [PMID: 38152988 DOI: 10.1002/smll.202306447] [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: 07/29/2023] [Revised: 12/18/2023] [Indexed: 12/29/2023]
Abstract
Due to their anisotropy, 1D semiconductor nanorod-based materials have attracted much attention in the process of hydrogen production by solar energy. Nevertheless, the rational design of 1D heterojunction materials and the modulation of photo-generated electron-hole transfer paths remain a challenge. Herein, a Znx Cd1-x S@ZnS/MoS2 core-shell nanorod heterojunction is precisely constructed via in situ growth of discontinuous ZnS shell and MoS2 NCs on the Zn─Cd─S nanorods. Among them, the Zn vacancy in the ZnS shell builds the defect level, and the nanoroelded MoS2 builds the electron transport site. The optimized photocatalyst shows significant photocatalytic activity without Platinum as an auxiliary catalyst, mainly due to the new interfacial charge transfer channel constructed by the shell vacancy level, the vertical separation and the de-accumulation process of photo-generated electrons and photo-generated holes. At the same time, spectral analysis, and density functional theory (DFT) calculations fully prove that shortening difference of speed between the photogenerated electron and hole movement process is another key factor to enhance the photocatalytic performance. This study provides a new path for the kinetic design of enhanced carrier density by shortening the carrier retention time of 1D heterojunction photocatalysts with improved photocatalytic performance.
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Affiliation(s)
- Shuang Wang
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China
| | - Yuye Cheng
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China
| | - Wenfei Huang
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China
| | - Minghao Dou
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China
| | - Hongyu Shao
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China
| | - Mengjie Yao
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China
| | - Kai Ding
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China
| | - Tongqi Ye
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China
| | - Rulong Zhou
- School of Materials Science and Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China
| | - Shenjie Li
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China
| | - Yanyan Chen
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China
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Lu Y, Shen N, Xi Y, Zhu T, Peng H, Zhong L, Li F. Bioenzyme-free colorimetric assay for creatinine determination based on Mn 3O 4 nanoparticles catalyzed oxidation of 3,3',5,5'-tetramethylbenzidine. Mikrochim Acta 2023; 191:44. [PMID: 38114756 DOI: 10.1007/s00604-023-06129-8] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 11/28/2023] [Indexed: 12/21/2023]
Abstract
Mn3O4 nanozyme with good oxidase-like activity was successfully synthesized. The prepared Mn3O4 nanozyme can directly and effectively catalyze the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) to generate green-blue-colored ox-TMB. Creatinine exhibits distinct inhibition effect on Mn3O4 nanozyme-catalyzed TMB colorimetric reaction system, leading to obvious color fading and absorbance intensity decrease of the reaction system. Furthermore, interference from uric acid can be effectively eliminated by regulating the pH of TMB-Mn3O4 colorimetric reaction system to pH 2.0. Then, a simple and bioenzyme-free colorimetric assay for the determination of creatinine was developed based on TMB-Mn3O4 colorimetric reaction. The linear detection range is from 100 to 800 μM and from 1 to 20 mM. The lowest limit of detection is 35.3 μM. Satisfied results are obtained for the determination of creatinine in real urine and sweat samples. This work provides the synthesis of a good oxidase-like nanozyme Mn3O4 and presents the fabrication of an effective nanozyme-based bioenzyme-free colorimetric assay for the determination of creatinine.
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Affiliation(s)
- Yuyang Lu
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, People's Republic of China
| | - Nuotong Shen
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, People's Republic of China
| | - Yachao Xi
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, People's Republic of China
| | - Tao Zhu
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, People's Republic of China
| | - Hao Peng
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, People's Republic of China
| | - Lihao Zhong
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, People's Republic of China
| | - Fang Li
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, People's Republic of China.
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Yang Y, Chen W, Wang M, Shen J, Tang Z, Qin Y, Yu DG. Engineered Shellac Beads-on-the-String Fibers Using Triaxial Electrospinning for Improved Colon-Targeted Drug Delivery. Polymers (Basel) 2023; 15:polym15102237. [PMID: 37242812 DOI: 10.3390/polym15102237] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [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: 04/11/2023] [Revised: 05/01/2023] [Accepted: 05/05/2023] [Indexed: 05/28/2023] Open
Abstract
Colon-targeted drug delivery is gradually attracting attention because it can effectively treat colon diseases. Furthermore, electrospun fibers have great potential application value in the field of drug delivery because of their unique external shape and internal structure. In this study, a core layer of hydrophilic polyethylene oxide (PEO) and the anti-colon-cancer drug curcumin (CUR), a middle layer of ethanol, and a sheath layer of the natural pH-sensitive biomaterial shellac were used in a modified triaxial electrospinning process to prepare beads-on-the-string (BOTS) microfibers. A series of characterizations were carried out on the obtained fibers to verify the process-shape/structure-application relationship. The results of scanning electron microscopy and transmission electron microscopy indicated a BOTS shape and core-sheath structure. X-ray diffraction results indicated that the drug in the fibers was in an amorphous form. Infrared spectroscopy revealed the good compatibility of the components in the fibers. In vitro drug release revealed that the BOTS microfibers provide colon-targeted drug delivery and zero-order drug release. Compared to linear cylindrical microfibers, the obtained BOTS microfibers can prevent the leakage of drugs in simulated gastric fluid, and they provide zero-order release in simulated intestinal fluid because the beads in BOTS microfibers can act as drug reservoirs.
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Affiliation(s)
- Yaoyao Yang
- School of Materials & Chemistry, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China
| | - Wei Chen
- School of Materials & Chemistry, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China
| | - Menglong Wang
- School of Materials & Chemistry, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China
| | - Jiachen Shen
- School of Materials & Chemistry, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China
| | - Zheng Tang
- School of Materials & Chemistry, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China
| | - Yongming Qin
- School of Materials & Chemistry, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China
| | - Deng-Guang Yu
- School of Materials & Chemistry, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China
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Yu J, Xie B, Bi GY, Zuo HH, Du XY, Bi LF, Li DM, Rao HX. Prevalence and diversity of small rodent-associated Bartonella species in Shangdang Basin, China. PLoS Negl Trop Dis 2022; 16:e0010446. [PMID: 35648747 PMCID: PMC9159596 DOI: 10.1371/journal.pntd.0010446] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 04/22/2022] [Indexed: 11/18/2022] Open
Abstract
The aim of this study was to investigate the occurrence and molecular characteristics of Bartonella infections in small rodents in the Shangdang Basin, China. Small rodents were captured using snap traps, and their liver, spleen, and kidney tissues were harvested for Bartonella detection and identification using a combination of real-time PCR of the ssrA gene (296 bp) and conventional PCR and sequencing of the gltA gene (379 bp). Results showed that 55 of 147 small rodents to be positive for Bartonella, with a positivity rate of 37.41%, and 95% confidence interval of 29.50%- 45.33%. While the positivity rate across genders (42.62% in males and 33.72% in females, χ2 = 1.208, P = 0.272) and tissues (28.57% in liver, 33.59% in spleen, and 36.76% in kidney, χ2 = 2.197, P = 0.333) of small rodents was not statistically different, that in different habitats (5.13% in villages, 84.44% in forests, and 54.17% in farmlands, χ2 = 80.105, P<0.001) was statistically different. There were 42 Bartonella sequences identified in six species, including 30 B. grahamii, three B. phoceensis, two B. japonica, two B. queenslandensis, one B. fuyuanensis and four unknown Bartonella species from Niviventer confucianus, Apodemus agrarius and Tscherskia triton. In addition to habitat, Bartonella species infection could be affected by the rodent species as well. Among the Bartonella species detected in this area, B. grahamii was the dominant epidemic species (accounting for 71.43%). B. grahamii exhibited four distinct clusters, and showed a certain host specificity. In addition, 11 haplotypes of B. grahamii were observed using DNASP 6.12.03, among which nine haplotypes were novel. Overall, high occurrence and genetic diversity of Bartonella were observed among small rodents in the Shangdang Basin; this information could potentially help the prevention and control of rodent-Bartonella species in this area.
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Affiliation(s)
- Juan Yu
- Department of Basic Medical Sciences, Changzhi Medical College, Changzhi, China
| | - Bing Xie
- Department of Nursing, Changzhi Medical College, Changzhi, China
| | - Ge-Yue Bi
- Department of Clinical Medicine, Changzhi Medical College, Changzhi, China
| | - Hui-Hui Zuo
- Department of Teaching and Scientific Research, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, China
| | - Xia-Yan Du
- Department of Clinical Medicine, Changzhi Medical College, Changzhi, China
| | - Li-Fang Bi
- Department of Clinical Medicine, Changzhi Medical College, Changzhi, China
| | - Dong-Mei Li
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
- * E-mail: (DML); (HXR)
| | - Hua-Xiang Rao
- Department of Public Health and Preventive Medicine, Changzhi Medical College, Changzhi, China
- * E-mail: (DML); (HXR)
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Yu J, Zhang XY, Chen YX, Cheng HB, Li DM, Rao HX. Molecular detection and genetic characterization of small rodents associated Bartonella species in Zhongtiao Mountain, China. PLoS One 2022; 17:e0264591. [PMID: 35226692 PMCID: PMC8884503 DOI: 10.1371/journal.pone.0264591] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 02/11/2022] [Indexed: 11/18/2022] Open
Abstract
The prevalence and molecular characteristics of Bartonella infections in small rodents in the Zhongtiao Mountain, China have been explored. In this study, the liver, spleen and kidney tissues of captured rodents were used for Bartonella spp. detection and identification by combination of real-time PCR of transfer-mRNA (ssrA) gene and traditional PCR and sequencing of citrate synthase (gltA) gene. It was shown that 49.52% of the rodents (52/105) were positive for Bartonella spp.. The infection rate in different gender (χ2 = 0.079, P = 0.778) and tissues (χ2 = 0.233, P = 0.890) of small rodents did not have statistical difference, but that in different small rodents (Fisher’s exact test, P < 0.001) and habitats (χ2 = 5.483, P = 0.019) had statistical difference. And, the sequencing data suggests that Bartonella sequences (n = 31) were identified into three species, including 14 of B. grahamii, 3 of B. queenslandensis and 14 of unknown Bartonella species. Phylogenetic analysis showed that B. grahamii sequences were clustered with the isolates from South Korea and China, and B. queenslandensis sequences were mainly closely related to the isolates from China and Thailand. The genetic diversity analysis showed that B. grahamii and B. queenslandensis sequences exhibited noticeable intraspecies diversity. Taken together our data demonstrates the high prevalence and genetic diversity of Bartonella infections in small rodents in the Zhongtiao Mountain, especially a potential novel Bartonella specie was detected, which could benefit the prevention and control of rodent-Bartonella species in this area.
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Affiliation(s)
- Juan Yu
- Department of Basic Medical Sciences, Changzhi Medical College, Changzhi, Shanxi, China
| | - Xiong-Ying Zhang
- Department of Basic Medical Sciences, Changzhi Medical College, Changzhi, Shanxi, China
| | - Yun-Xia Chen
- Department of Basic Medical Sciences, Changzhi Medical College, Changzhi, Shanxi, China
| | - Hong-Bing Cheng
- Department of Basic Medical Sciences, Changzhi Medical College, Changzhi, Shanxi, China
| | - Dong-Mei Li
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
- * E-mail: (DL); (HR)
| | - Hua-Xiang Rao
- Department of Public Health and Preventive Medicine, Changzhi Medical College, Changzhi, Shanxi, China
- * E-mail: (DL); (HR)
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Zhang Y, Liang S, Feng Y, Wang Q, Sun F, Chen S, Yang Y, He X, Zhu H, Pan H. Automation of literature screening using machine learning in medical evidence synthesis: a diagnostic test accuracy systematic review protocol. Syst Rev 2022; 11:11. [PMID: 35031074 PMCID: PMC8760775 DOI: 10.1186/s13643-021-01881-5] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 12/27/2021] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Systematic review is an indispensable tool for optimal evidence collection and evaluation in evidence-based medicine. However, the explosive increase of the original literatures makes it difficult to accomplish critical appraisal and regular update. Artificial intelligence (AI) algorithms have been applied to automate the literature screening procedure in medical systematic reviews. In these studies, different algorithms were used and results with great variance were reported. It is therefore imperative to systematically review and analyse the developed automatic methods for literature screening and their effectiveness reported in current studies. METHODS An electronic search will be conducted using PubMed, Embase, ACM Digital Library, and IEEE Xplore Digital Library databases, as well as literatures found through supplementary search in Google scholar, on automatic methods for literature screening in systematic reviews. Two reviewers will independently conduct the primary screening of the articles and data extraction, in which nonconformities will be solved by discussion with a methodologist. Data will be extracted from eligible studies, including the basic characteristics of study, the information of training set and validation set, and the function and performance of AI algorithms, and summarised in a table. The risk of bias and applicability of the eligible studies will be assessed by the two reviewers independently based on Quality Assessment of Diagnostic Accuracy Studies (QUADAS-2). Quantitative analyses, if appropriate, will also be performed. DISCUSSION Automating systematic review process is of great help in reducing workload in evidence-based practice. Results from this systematic review will provide essential summary of the current development of AI algorithms for automatic literature screening in medical evidence synthesis and help to inspire further studies in this field. SYSTEMATIC REVIEW REGISTRATION PROSPERO CRD42020170815 (28 April 2020).
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Affiliation(s)
- Yuelun Zhang
- Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Siyu Liang
- Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Shuaifuyuan, Dongcheng District, Beijing, China
| | - Yunying Feng
- Eight-year Program of Clinical Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Qing Wang
- Research Institute of Information and Technology, Tsinghua University, Beijing, China
| | - Feng Sun
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China
| | - Shi Chen
- Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Shuaifuyuan, Dongcheng District, Beijing, China
| | - Yiying Yang
- Eight-year Program of Clinical Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xin He
- Eight-year Program of Clinical Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Huijuan Zhu
- Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Shuaifuyuan, Dongcheng District, Beijing, China
| | - Hui Pan
- Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Shuaifuyuan, Dongcheng District, Beijing, China
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Han D, Li J, Zhang Q, He Z, Wu Z, Chu J, Lu Y. Synthesis of π-Conjugated Polymers Containing Benzotriazole Units via Palladium-Catalyzed Direct C-H Cross-Coupling Polycondensation for OLEDs Applications. Polymers (Basel) 2021; 13:254. [PMID: 33466635 PMCID: PMC7828650 DOI: 10.3390/polym13020254] [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] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/08/2021] [Accepted: 01/10/2021] [Indexed: 11/16/2022] Open
Abstract
Four D-π-A conjugated polymers, namely P1-P4, which contain benzotriazole building blocks in their backbone as acceptor, are synthesized via palladium-catalyzed direct C-H cross-coupling polycondensation of 5,6-difluorobenzotriazole with different thiophene derivatives, including 3-octylthiophene, 2,2'-bithiophene, thieno[3,4-b][1,4]dioxine, and 4,4-dioctyl-4H-silolo-[3,2-b:4,5-b']dithiophene as donor units, respectively. Taking the polymer P1 as an example, the chemical structure of the polymer is demonstrated by 1H and 19F NMR spectra. The optical, electrochemical, and thermal properties of these polymers are assessed by UV-vis absorption and fluorescence spectroscopy, cyclic voltammetry (CV), and thermal gravimetric analysis (TGA), respectively. DFT simulations of all polymers are also performed to understand their physicochemical properties. Furthermore, P1 and P2, which have relatively higher molecular weights and better fluorescent quantum efficiency than those of P3 and P4, are utilized as lighting emitters for organic light-emitting diodes (OLEDs), affording promising green and red luminescence with 0.07% and 0.14% of maximum external quantum efficiency, respectively, based on a device with an architecture of ITO/PEDOT:PSS/PTAA/the polymer emitting layer/TPBi/LiF/Al.
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Affiliation(s)
- Dong Han
- School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China; (D.H.); (J.L.); (Z.H.); (Z.W.); (J.C.)
| | - Jingwen Li
- School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China; (D.H.); (J.L.); (Z.H.); (Z.W.); (J.C.)
| | - Qiang Zhang
- School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China; (D.H.); (J.L.); (Z.H.); (Z.W.); (J.C.)
- Tianjin Key Laboratory for Photoelectric Materials and Devices, Tianjin University of Technology, Tianjin 300384, China
| | - Zewang He
- School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China; (D.H.); (J.L.); (Z.H.); (Z.W.); (J.C.)
| | - Zhiwei Wu
- School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China; (D.H.); (J.L.); (Z.H.); (Z.W.); (J.C.)
| | - Jingting Chu
- School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China; (D.H.); (J.L.); (Z.H.); (Z.W.); (J.C.)
| | - Yan Lu
- School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China; (D.H.); (J.L.); (Z.H.); (Z.W.); (J.C.)
- Tianjin Key Laboratory for Photoelectric Materials and Devices, Tianjin University of Technology, Tianjin 300384, China
- Key Laboratory of Display Materials & Photoelectric Devices, Ministry of Education, Tianjin University of Technology, Tianjin 300384, China
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