1
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Bhatta RP, Agarwal A, Kachwal V, Raichure PC, Laskar IR. Enhanced TNT vapor sensing through a PMMA-mediated AIPE-active monocyclometalated iridium(III) complex: a leap towards real-time monitoring. Analyst 2024; 149:2445-2458. [PMID: 38506420 DOI: 10.1039/d3an02184j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Based on the explosive nature and harmful effects of nitro-based explosive materials on living beings and the environment, it is extremely important to develop luminescence-based probe molecules for their detection with excellent selectivity and sensitivity. Two AIPE (aggregation-induced phosphorescence emission)-active iridium(III) complexes (M1 and M2) were developed for the sensitive detection of TNT in both contact and non-contact modes. The aggregate solutions of both complexes (M1 and M2 in THF/H2O, 1/9 by volume) detected TNT at the pico-molar (pM) level. These complexes showed greatly enhanced emission intensity while embedded in a PMMA(polymethyl methacrylate) matrix film. The amplified quantum efficiency, improved phosphorescence lifetime, and enhanced porous network of M2-PMMA composite helps to improve the sesitivity of TNT vapor detection. Interestingly, the sensitivity of the detection of TNT by the M2 complex was significantly improved (5-fold) in a PMMA-incorporated complex (CP) with an observed limit of detection (LOD) of 12.8 ppb. From the BET analysis of CP, it was observed that the mesoporous network of CP has an average pore diameter of 8.52 nm and a surface area of 2.03 m2 g-1. The porous network of CP assists in trapping TNT vapor in a polymeric network containing an electron-rich probe (iridium(III) complex, M2), which helps to effectively trap TNT, thus enhancing electronic communication. As a result, significant emission quenching was observed.
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Affiliation(s)
- Ram Prasad Bhatta
- Department of Chemistry, Birla Institute of Technology and Science, Pilani Campus, Pilani, Rajasthan 333031, India.
| | - Annu Agarwal
- Department of Chemistry, Birla Institute of Technology and Science, Pilani Campus, Pilani, Rajasthan 333031, India.
| | - Vishal Kachwal
- Department of Chemistry, Birla Institute of Technology and Science, Pilani Campus, Pilani, Rajasthan 333031, India.
| | - Pramod C Raichure
- Department of Chemistry, Birla Institute of Technology and Science, Pilani Campus, Pilani, Rajasthan 333031, India.
| | - Inamur Rahaman Laskar
- Department of Chemistry, Birla Institute of Technology and Science, Pilani Campus, Pilani, Rajasthan 333031, India.
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2
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Castellanos-Rubio I, Barón A, Luis-Lizarraga O, Rodrigo I, de Muro IG, Orue I, Martínez-Martínez V, Castellanos-Rubio A, López-Arbeloa F, Insausti M. Efficient Magneto-Luminescent Nanosystems based on Rhodamine-Loaded Magnetite Nanoparticles with Optimized Heating Power and Ideal Thermosensitive Fluorescence. ACS APPLIED MATERIALS & INTERFACES 2022; 14:50033-50044. [PMID: 36302136 PMCID: PMC9650688 DOI: 10.1021/acsami.2c14016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
Nanosystems that simultaneously contain fluorescent and magnetic modules can offer decisive advantages in the development of new biomedical approaches. A biomaterial that enables multimodal imaging and contains highly efficient nanoheaters together with an intrinsic temperature sensor would become an archetypical theranostic agent. In this work, we have designed a magneto-luminescent system based on Fe3O4 NPs with large heating power and thermosensitive rhodamine (Rh) fluorophores that exhibits the ability to self-monitor the hyperthermia degree. Three samples composed of highly homogeneous Fe3O4 NPs of ∼25 nm and different morphologies (cuboctahedrons, octahedrons, and irregular truncated-octahedrons) have been finely synthesized. These NPs have been thoroughly studied in order to choose the most efficient inorganic core for magnetic hyperthermia under clinically safe radiofrequency. Surface functionalization of selected Fe3O4 NPs has been carried out using fluorescent copolymers composed of PMAO, PEG and Rh. Copolymers with distinct PEG tail lengths (5-20 kDa) and different Rh percentages (5, 10, and 25%) have been synthesized, finding out that the copolymer with 20 kDa PEG and 10% Rh provides the best coating for an efficient fluorescence with minimal aggregation effects. The optimized Fe3O4@Rh system offers very suitable fluorescence thermosensitivity in the therapeutic hyperthermia range. Additionally, this sample presents good biocompatibility and displays an excellent heating capacity within the clinical safety limits of the AC field (≈ 1000 W/g at 142 kHz and 44 mT), which has been confirmed by both calorimetry and AC magnetometry. Thus, the current work opens up promising avenues toward next-generation medical technologies.
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Affiliation(s)
- Idoia Castellanos-Rubio
- Departamento
Química Orgánica e Inorgánica, Facultad de Ciencia
y Tecnología, UPV/EHU, Barrio Sarriena s/n, 48940, Leioa, Spain
| | - Ander Barón
- Departamento
Química Orgánica e Inorgánica, Facultad de Ciencia
y Tecnología, UPV/EHU, Barrio Sarriena s/n, 48940, Leioa, Spain
| | - Oier Luis-Lizarraga
- Departamento
Química Orgánica e Inorgánica, Facultad de Ciencia
y Tecnología, UPV/EHU, Barrio Sarriena s/n, 48940, Leioa, Spain
| | - Irati Rodrigo
- Departamento
Electricidad y Electrónica, Facultad de Ciencia y Tecnología, UPV/EHU, Barrio Sarriena s/n, Leioa48940, Spain
| | - Izaskun Gil de Muro
- Departamento
Química Orgánica e Inorgánica, Facultad de Ciencia
y Tecnología, UPV/EHU, Barrio Sarriena s/n, 48940, Leioa, Spain
- BC Materials,
Basque Center for Materials, Applications
and Nanostructures, Barrio
Sarriena s/n, Leioa48940, Spain
| | - Iñaki Orue
- SGIker,
Servicios Generales de Investigación, UPV/EHU, Barrio Sarriena
s/n, Leioa48940, Spain
| | - Virginia Martínez-Martínez
- Departamento
Química Física, Facultad de Ciencia y Tecnología, UPV/EHU, Barrio Sarriena s/n, Leioa48940, Spain
| | - Ainara Castellanos-Rubio
- Departamento
Genética, Antropología Física y Fisiología
Animal, Facultad de Medicina, UPV/EHU, Leioa48940, Spain
- Biocruces
Bizkaia Health Research Institute, Cruces Plaza, Barakaldo48903, Spain
- Biomedical
Research Center in Diabetes Network and Associated Metabolic Diseases, Madrid28029, Spain
- IKERBASQUE
Basque Foundation for Science, Bilbao48013, Spain
| | - Fernando López-Arbeloa
- Departamento
Química Física, Facultad de Ciencia y Tecnología, UPV/EHU, Barrio Sarriena s/n, Leioa48940, Spain
| | - Maite Insausti
- Departamento
Química Orgánica e Inorgánica, Facultad de Ciencia
y Tecnología, UPV/EHU, Barrio Sarriena s/n, 48940, Leioa, Spain
- BC Materials,
Basque Center for Materials, Applications
and Nanostructures, Barrio
Sarriena s/n, Leioa48940, Spain
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3
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Luminescence encoding of polymer microbeads with organic dyes and semiconductor quantum dots during polymerization. Sci Rep 2022; 12:12061. [PMID: 35835808 PMCID: PMC9283474 DOI: 10.1038/s41598-022-16065-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 07/04/2022] [Indexed: 01/15/2023] Open
Abstract
Luminescence-encoded microbeads are important tools for many applications in the life and material sciences that utilize luminescence detection as well as multiplexing and barcoding strategies. The preparation of such beads often involves the staining of premanufactured beads with molecular luminophores using simple swelling procedures or surface functionalization with layer-by-layer (LbL) techniques. Alternatively, these luminophores are sterically incorporated during the polymerization reaction yielding the polymer beads. The favorable optical properties of semiconductor quantum dots (QDs), which present broadly excitable, size-tunable, narrow emission bands and low photobleaching sensitivity, triggered the preparation of beads stained with QDs. However, the colloidal nature and the surface chemistry of these QDs, which largely controls their luminescence properties, introduce new challenges to bead encoding that have been barely systematically assessed. To establish a straightforward approach for the bead encoding with QDs with minimized loss in luminescence, we systematically assessed the incorporation of oleic acid/oleylamine-stabilized CdSe/CdS-core/shell-QDs into 0.5-2.5 µm-sized polystyrene (PS) microspheres by a simple dispersion polymerization synthesis that was first optimized with the organic dye Nile Red. Parameters addressed for the preparation of luminophore-encoded beads include the use of a polymer-compatible ligand such as benzyldimethyloctadecylammonium chloride (OBDAC) for the QDs, and crosslinking to prevent luminophore leakage. The physico-chemical and optical properties of the resulting beads were investigated with electron microscopy, dynamic light scattering, optical spectroscopy, and fluorescence microscopy. Particle size distribution, fluorescence quantum yield of the encapsulated QDs, and QD leaking stability were used as measures for bead quality. The derived optimized bead encoding procedure enables the reproducible preparation of bright PS microbeads encoded with organic dyes as well as with CdSe/CdS-QDs. Although these beads show a reduced photoluminescence quantum yield compared to the initially very strongly luminescent QDs, with values of about 35%, their photoluminescence quantum yield is nevertheless still moderate.
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4
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Gao Y, Zhang J, Liang J, Yuan D, Zhao W. Research Progress of Poly(methyl methacrylate) Microspheres: Preparation, Functionalization and Application. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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5
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Chen W, Zhao J, Hou M, Yang M, Yi C. Gadolinium-porphyrin based polymer nanotheranostics for fluorescence/magnetic resonance imaging guided photodynamic therapy. NANOSCALE 2021; 13:16197-16206. [PMID: 34545903 DOI: 10.1039/d1nr04489c] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Nanotheranostics for fluorescence/magnetic resonance (FL/MR) dual-modal imaging guided photodynamic therapy (PDT) are highly desirable in precision and personalized medicine. In this study, a facile non-covalent electrostatic interaction induced self-assembly strategy is developed to effectively encapsulate gadolinium porphyrin (Gd-TCPP) into homogeneous supramolecular nanoparticles (referred to as Gd-PNPs). Gd-PNPs exhibit the following advantages: (1) excellent FL imaging property, high longitudinal relaxivity (16.157 mM-1 s-1), and good singlet oxygen (1O2) production property; (2) excellent long-term colloidal stability, dispersity and biocompatibility; and (3) enhanced in vivo FL/MR imaging guided tumor growth inhibition efficiency for CT 26 tumor-bearing mice. This study provides a new strategy to design and synthesize metalloporphyrin-based nanotheranostics for imaging-guided cancer therapy with enhanced theranostic properties.
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Affiliation(s)
- Wandi Chen
- Guangdong Provincial Engineering and Technology Center of Advanced and Portable Medical Devices, School of Biomedical Engineering, Sun Yat-Sen University, Shenzhen 518107, China.
| | - Junkai Zhao
- Guangdong Provincial Engineering and Technology Center of Advanced and Portable Medical Devices, School of Biomedical Engineering, Sun Yat-Sen University, Shenzhen 518107, China.
| | - Mengfei Hou
- Guangdong Provincial Engineering and Technology Center of Advanced and Portable Medical Devices, School of Biomedical Engineering, Sun Yat-Sen University, Shenzhen 518107, China.
| | - Mo Yang
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong, People's Republic of China
| | - Changqing Yi
- Guangdong Provincial Engineering and Technology Center of Advanced and Portable Medical Devices, School of Biomedical Engineering, Sun Yat-Sen University, Shenzhen 518107, China.
- Research Institute of Sun Yat-Sen University in Shenzhen, Shenzhen, 518057, P. R. China
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6
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Algar WR, Massey M, Rees K, Higgins R, Krause KD, Darwish GH, Peveler WJ, Xiao Z, Tsai HY, Gupta R, Lix K, Tran MV, Kim H. Photoluminescent Nanoparticles for Chemical and Biological Analysis and Imaging. Chem Rev 2021; 121:9243-9358. [PMID: 34282906 DOI: 10.1021/acs.chemrev.0c01176] [Citation(s) in RCA: 117] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Research related to the development and application of luminescent nanoparticles (LNPs) for chemical and biological analysis and imaging is flourishing. Novel materials and new applications continue to be reported after two decades of research. This review provides a comprehensive and heuristic overview of this field. It is targeted to both newcomers and experts who are interested in a critical assessment of LNP materials, their properties, strengths and weaknesses, and prospective applications. Numerous LNP materials are cataloged by fundamental descriptions of their chemical identities and physical morphology, quantitative photoluminescence (PL) properties, PL mechanisms, and surface chemistry. These materials include various semiconductor quantum dots, carbon nanotubes, graphene derivatives, carbon dots, nanodiamonds, luminescent metal nanoclusters, lanthanide-doped upconversion nanoparticles and downshifting nanoparticles, triplet-triplet annihilation nanoparticles, persistent-luminescence nanoparticles, conjugated polymer nanoparticles and semiconducting polymer dots, multi-nanoparticle assemblies, and doped and labeled nanoparticles, including but not limited to those based on polymers and silica. As an exercise in the critical assessment of LNP properties, these materials are ranked by several application-related functional criteria. Additional sections highlight recent examples of advances in chemical and biological analysis, point-of-care diagnostics, and cellular, tissue, and in vivo imaging and theranostics. These examples are drawn from the recent literature and organized by both LNP material and the particular properties that are leveraged to an advantage. Finally, a perspective on what comes next for the field is offered.
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Affiliation(s)
- W Russ Algar
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Melissa Massey
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Kelly Rees
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Rehan Higgins
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Katherine D Krause
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Ghinwa H Darwish
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - William J Peveler
- School of Chemistry, Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, U.K
| | - Zhujun Xiao
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Hsin-Yun Tsai
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Rupsa Gupta
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Kelsi Lix
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Michael V Tran
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Hyungki Kim
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
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7
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MnO 2 Nanospheres Assisted by Cysteine Combined with MnO 2 Nanosheets as a Fluorescence Resonance Energy Transfer System for "Switch-on" Detection of Glutathione. Anal Chem 2021; 93:9621-9627. [PMID: 34197082 DOI: 10.1021/acs.analchem.1c01787] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Manganese dioxide nanosheets combined with cysteine-assisted emitting manganese dioxide nanospheres (Cys-MnO2 nanospheres) is fabricated for the first time as an "off-on" fluorescence detection platform for glutathione (GSH). In this sensing system, Cys-MnO2 nanospheres served as energy donors, while MnO2 nanosheets were used as both energy acceptors and recognition units. MnO2 nanosheets can effectively quench the fluorescence of Cys-MnO2 nanospheres through the fluorescence resonance energy transfer (FRET). The addition of GSH could reduce MnO2 nanosheets into Mn2+, disrupting the FRET process and restoring the fluorescence of Cys-MnO2 nanospheres. Under the optimum conditions, the "switch-on" platform we established has a wide response to GSH with a range of 5-50 μM and 150-800 μM, as well as a superior specificity. Importantly, all components of the sensor are nontoxic, biocompatible, easily prepared, and have a high utilization of raw materials. Moreover, the sensing system achieved satisfactory results in human serum, showing a tremendous potential in the field of biomedicine.
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8
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Cheng M, Zhou L, Ma J, Mu J, Yi C, Li MJ. Iridium(III) and gadolinium(III) loaded and peptide-modified silica nanoparticles for photoluminescence and magnetic resonance (dual) imaging. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 104:109972. [DOI: 10.1016/j.msec.2019.109972] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 06/18/2019] [Accepted: 07/12/2019] [Indexed: 01/11/2023]
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9
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Liu W, Xie Z, Lu Y, Gao M, Zhang W, Gao L. Fabrication and excellent electroresponsive properties of ideal PMMA@BaTiO 3 composite particles. RSC Adv 2019; 9:12404-12414. [PMID: 35515821 PMCID: PMC9063694 DOI: 10.1039/c9ra01174a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 03/30/2019] [Indexed: 11/21/2022] Open
Abstract
A series of core–shell-structured poly(methylmethacrylate)@BaTiO3 (PMMA@BT) composite particles were constructed via the self-assembly of BT nanoparticles on the surfaces of PMMA cores through the covalent bonding of siloxane groups at room temperature. The PMMA@BT composite particles were characterized by scanning electron microscopy, transmission electron microscopy, infrared spectroscopy, X-ray diffraction, video-based optical contact angle measurement, thermogravimetric analysis, and impedance analysis. The electroresponses of the obtained PMMA@BT composite particles were all stronger than that of pure BT, and the electroresponse depended on the weight percentage of the BT shell. The PMMA@BT particles with the optimal core–shell structure contained 58.14 wt% of BT shell. The surface hydrophilicity of the optimal particles was close to that of pure BT, and the dielectric constant was the greatest among the series of synthesized PMMA@BT particles. Thus, the optimized PMMA@BT particles demonstrated the strongest electroresponsive behavior in gelatin hydrogel elastomer, as demonstrated by polarized microscopy and dynamic mechanical analysis. The excellent electroresponsive property of the optimal PMMA@BT particles is reflected by the large sensitivity of the increase in storage modulus for the gelatin hydrogel elastomer containing the composite particles (21% at E = 0.8 kV mm−1 and a particle loading of 1.0 wt%), far greater than that of pure BT particles (4.7%). Based on the sensitive electroresponsive properties, the PMMA@BT particles have potential applications as electroresponsive materials. A series of core–shell-structured poly(methylmethacrylate)@BaTiO3 (PMMA@BT) composite particles were constructed via the self-assembly of BT nanoparticles on the surfaces of PMMA cores through the covalent bonding of siloxane groups at room temperature.![]()
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Affiliation(s)
- Wen Liu
- Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University), Ministry of Education Xi'an 710119 PR China +86-29-8153-0727 +86-29-8153-0730 +86-29-81530813.,School of Chemistry & Chemical Engineering, Shaanxi Normal University Xi'an 710119 PR China
| | - Zunyuan Xie
- Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University), Ministry of Education Xi'an 710119 PR China +86-29-8153-0727 +86-29-8153-0730 +86-29-81530813.,School of Chemistry & Chemical Engineering, Shaanxi Normal University Xi'an 710119 PR China
| | - Yaping Lu
- Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University), Ministry of Education Xi'an 710119 PR China +86-29-8153-0727 +86-29-8153-0730 +86-29-81530813.,School of Chemistry & Chemical Engineering, Shaanxi Normal University Xi'an 710119 PR China
| | - Meixiang Gao
- Yulin Vocational and Technical College Yulin 719000 PR China
| | - Weiqiang Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University), Ministry of Education Xi'an 710119 PR China +86-29-8153-0727 +86-29-8153-0730 +86-29-81530813.,School of Chemistry & Chemical Engineering, Shaanxi Normal University Xi'an 710119 PR China
| | - Lingxiang Gao
- Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University), Ministry of Education Xi'an 710119 PR China +86-29-8153-0727 +86-29-8153-0730 +86-29-81530813.,School of Chemistry & Chemical Engineering, Shaanxi Normal University Xi'an 710119 PR China
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10
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Zhang C, Luo J, Ou L, Lun Y, Cai S, Hu B, Yu G, Pan C. Fluorescent Porous Carbazole-Decorated Copolymer Monodisperse Microspheres: Facile synthesis, Selective and Recyclable Detection of Iron (III) in Aqueous Medium. Chemistry 2018; 24:3030-3037. [DOI: 10.1002/chem.201705560] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Chunyan Zhang
- College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources; Central South University; Changsha 410083 P. R. China
- Department of Materials and Chemical Engineering, Key Laboratory of Functional Materials for Green Building; Hunan Institute of Technology; Hengyang 421002 P. R. China
| | - Jianxin Luo
- Department of Materials and Chemical Engineering, Key Laboratory of Functional Materials for Green Building; Hunan Institute of Technology; Hengyang 421002 P. R. China
| | - Lijuan Ou
- Department of Materials and Chemical Engineering, Key Laboratory of Functional Materials for Green Building; Hunan Institute of Technology; Hengyang 421002 P. R. China
| | - Yinghui Lun
- Department of Materials and Chemical Engineering, Key Laboratory of Functional Materials for Green Building; Hunan Institute of Technology; Hengyang 421002 P. R. China
| | - Songtao Cai
- Department of Materials and Chemical Engineering, Key Laboratory of Functional Materials for Green Building; Hunan Institute of Technology; Hengyang 421002 P. R. China
| | - Bonian Hu
- Department of Materials and Chemical Engineering, Key Laboratory of Functional Materials for Green Building; Hunan Institute of Technology; Hengyang 421002 P. R. China
| | - Guipeng Yu
- College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources; Central South University; Changsha 410083 P. R. China
| | - Chunyue Pan
- College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources; Central South University; Changsha 410083 P. R. China
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11
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Pan Y, Chen W, Yang J, Zheng J, Yang M, Yi C. Facile Synthesis of Gadolinium Chelate-Conjugated Polymer Nanoparticles for Fluorescence/Magnetic Resonance Dual-Modal Imaging. Anal Chem 2018; 90:1992-2000. [DOI: 10.1021/acs.analchem.7b04078] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Yi Pan
- Key
Laboratory of Sensing Technology and Biomedical Instruments (Guangdong
Province), School of Engineering, Sun Yat-Sen University, Guangzhou, People’s Republic of China
| | - Wandi Chen
- Key
Laboratory of Sensing Technology and Biomedical Instruments (Guangdong
Province), School of Engineering, Sun Yat-Sen University, Guangzhou, People’s Republic of China
| | - Jun Yang
- Guangdong General Hospital, Guangzhou, People’s Republic of China
| | - Junhui Zheng
- Guangdong General Hospital, Guangzhou, People’s Republic of China
| | - Mengsu Yang
- Department
of Biomedical Sciences, City University of Hong Kong, Hong Kong, People’s Republic of China
| | - Changqing Yi
- Key
Laboratory of Sensing Technology and Biomedical Instruments (Guangdong
Province), School of Engineering, Sun Yat-Sen University, Guangzhou, People’s Republic of China
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12
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Monguzzi A, Ballabio M, Yanai N, Kimizuka N, Fazzi D, Campione M, Meinardi F. Highly Fluorescent Metal-Organic-Framework Nanocomposites for Photonic Applications. NANO LETTERS 2018; 18:528-534. [PMID: 29232950 DOI: 10.1021/acs.nanolett.7b04536] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Metal-organic frameworks (MOFs) are porous hybrid materials built up from organic ligands coordinated to metal ions or clusters by means of self-assembly strategies. The peculiarity of these materials is the possibility, according to specific synthetic routes, to manipulate both the composition and ligands arrangement in order to control their optical and energy-transport properties. Therefore, optimized MOFs nanocrystals (nano-MOFs) can potentially represent the next generation of luminescent materials with features similar to those of their inorganic predecessors, that is, the colloidal semiconductor quantum dots. The luminescence of fluorescent nano-MOFs is generated through the radiative recombination of ligand molecular excitons. The uniqueness of these nanocrystals is the possibility to pack the ligand chromophores close enough to allow a fast exciton diffusion but sufficiently far from each other preventing the aggregation-induced effects of the organic crystals. In particular, the formation of strongly coupled dimers or excimers is avoided, thus preserving the optical features of the isolated molecule. However, nano-MOFs have a very small fluorescence quantum yield (QY). In order to overcome this limitation and achieve highly emitting systems, we analyzed the fluorescence process in blue emitting nano-MOFs and modeled the diffusion and quenching mechanism of photogenerated singlet excitons. Our results demonstrate that the excitons quenching in nano-MOFs is mainly due to the presence of surface-located, nonradiative recombination centers. In analogy with their inorganic counterparts, we found that the passivation of the nano-MOF surfaces is a straightforward method to enhance the emission efficiency. By embedding the nanocrystals in an inert polymeric host, we observed a +200% increment of the fluorescence QY, thus recovering the emission properties of the isolated ligand in solution.
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Affiliation(s)
- A Monguzzi
- Dipartimento di Scienza dei Materiali, Università degli Studi Milano Bicocca via R . Cozzi 55, 20125 Milan, Italy
| | - M Ballabio
- Dipartimento di Scienza dei Materiali, Università degli Studi Milano Bicocca via R . Cozzi 55, 20125 Milan, Italy
| | - N Yanai
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu University , Moto-oka 744, Nishi-ku, Fukuoka 819-0395, Japan
- PRESTO, JST , Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan
| | - N Kimizuka
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu University , Moto-oka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - D Fazzi
- Max-Planck-Institut für Kohlenforschung (MPI-KOFO) Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - M Campione
- Department of Earth and Environmental Sciences, Università degli Studi Milano-Bicocca , Piazza della Scienza 4, 20126 Milano, Italy
| | - F Meinardi
- Dipartimento di Scienza dei Materiali, Università degli Studi Milano Bicocca via R . Cozzi 55, 20125 Milan, Italy
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13
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Poostforooshan J, Badiei A, Farzi G, Goldooz H, Weber AP. Investigation of environmental and concentration effects on fluorescence properties of AlQ3 using mesoporous silica and polyacrylate. CHEMICAL PAPERS 2017. [DOI: 10.1007/s11696-017-0183-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Colby AH, Berry SM, Moran AM, Pasion KA, Liu R, Colson YL, Ruiz-Opazo N, Grinstaff MW, Herrera VLM. Highly Specific and Sensitive Fluorescent Nanoprobes for Image-Guided Resection of Sub-Millimeter Peritoneal Tumors. ACS NANO 2017; 11:1466-1477. [PMID: 28099801 PMCID: PMC5725964 DOI: 10.1021/acsnano.6b06777] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A current challenge in the treatment of peritoneal carcinomatosis is the inability to detect, visualize, and resect small or microscopic tumors of pancreatic, ovarian, or mesothelial origin. In these diseases, the completeness of primary tumor resection is directly correlated with patient survival, and hence, identifying small sub-millimeter tumors (i.e., disseminated disease) is critical. Thus, new imaging techniques and probes are needed to improve cytoreductive surgery and patient outcomes. Highly fluorescent rhodamine-labeled expansile nanoparticles (HFR-eNPs) are described for use as a visual aid during cytoreductive surgery of pancreatic carcinomatosis. The covalent incorporation of rhodamine into ∼30 nm eNPs increases the fluorescent signal compared to free rhodamine, thereby affording a brighter and more effective probe than would be achieved by a single rhodamine molecule. Using the intraperitoneal route of administration, HFR-eNPs localize to regions of large (∼1 cm), sub-centimeter, and sub-millimeter intraperitoneal tumor in three different animal models, including pancreatic, mesothelioma, and ovarian carcinoma. Tumoral localization of the HFR-eNPs depends on both the material property (i.e., eNP polymer) as well as the surface chemistry (anionic surfactant vs PEGylated noncharged surfactant). In a rat model of pancreatic carcinomatosis, HFR-eNP identification of tumor is validated against gold-standard histopathological analysis to reveal that HFR-eNPs possess high specificity (99%) and sensitivity (92%) for tumors, in particular, sub-centimeter and microscopic sub-millimeter tumors, with an overall accuracy of 95%. Finally, as a proof-of-concept, HFR-eNPs are used to guide the resection of pancreatic tumors in a rat model of peritoneal carcinomatosis.
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Affiliation(s)
- Aaron H. Colby
- Departments of Biomedical Engineering and Chemistry, Boston University, Boston, Massachusetts 02215, United States
- Division of Thoracic Surgery, Department of Surgery, Brigham and Women’s Hospital, Boston, Massachusetts 02115, United States
| | - Samantha M. Berry
- Departments of Biomedical Engineering and Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Ann M. Moran
- Department of Medicine and Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, Massachusetts 02118, United States
| | - Kristine Amber Pasion
- Department of Medicine and Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, Massachusetts 02118, United States
| | - Rong Liu
- Division of Thoracic Surgery, Department of Surgery, Brigham and Women’s Hospital, Boston, Massachusetts 02115, United States
| | - Yolonda L. Colson
- Division of Thoracic Surgery, Department of Surgery, Brigham and Women’s Hospital, Boston, Massachusetts 02115, United States
| | - Nelson Ruiz-Opazo
- Department of Medicine and Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, Massachusetts 02118, United States
| | - Mark W. Grinstaff
- Departments of Biomedical Engineering and Chemistry, Boston University, Boston, Massachusetts 02215, United States
- Department of Medicine and Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, Massachusetts 02118, United States
- Corresponding Authors: ,
| | - Victoria L. M. Herrera
- Department of Medicine and Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, Massachusetts 02118, United States
- Corresponding Authors: ,
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15
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Jasinski F, Teo VL, Kuchel RP, Mballa Mballa M, Thickett SC, Brinkhuis RHG, Weaver W, Zetterlund PB. Synthesis and characterisation of gradient polymeric nanoparticles. Polym Chem 2017. [DOI: 10.1039/c6py02062c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In this communication, we report the successful synthesis of gradient morphology nanoparticles composed of poly(styrene-co-methyl methacrylate) and their characterisation using X-Ray Photoelectron Spectroscopy (XPS).
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Affiliation(s)
- Florent Jasinski
- Centre for Advanced Macromolecular Design (CAMD)
- School of Chemical Engineering
- University of New South Wales
- Sydney
- Australia
| | - Victoria L. Teo
- Centre for Advanced Macromolecular Design (CAMD)
- School of Chemical Engineering
- University of New South Wales
- Sydney
- Australia
| | - Rhiannon P. Kuchel
- Electron Microscopy Unit (EMU)
- University of New South Wales
- Sydney
- Australia
| | | | | | | | - William Weaver
- School of Physical Sciences
- University of Tasmania
- Sandy Bay
- Australia
| | - Per B. Zetterlund
- Centre for Advanced Macromolecular Design (CAMD)
- School of Chemical Engineering
- University of New South Wales
- Sydney
- Australia
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16
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Soleilhac A, Girod M, Dugourd P, Burdin B, Parvole J, Dugas PY, Bayard F, Lacôte E, Bourgeat-Lami E, Antoine R. Temperature Response of Rhodamine B-Doped Latex Particles. From Solution to Single Particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4052-4058. [PMID: 27042942 DOI: 10.1021/acs.langmuir.6b00647] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Nanoparticle-based temperature imaging is an emerging field of advanced applications. Herein, the sensitivity of the fluorescence of rhodamine B-doped latex nanoparticles toward temperature is described. Submicrometer size latex particles were prepared by a surfactant-free emulsion polymerization method that allowed a simple and inexpensive way to incorporate rhodamine B into the nanoparticles. Also, rhodamine B-coated latex nanoparticles dispersed in water were prepared in order to address the effect of the dye location in the nanoparticles on their temperature dependence. A better linearity of the temperature dependence emission of the rhodamine B-embedded latex particles, as compared to that of free rhodamine B dyes or rhodamine B-coated latex particles, is observed. Temperature-dependent fluorescence measurements by fluorescent confocal microscopy on individual rhodamine B-embedded latex particles were found similar to those obtained for fluorescent latex nanoparticles in solution, indicating that these nanoparticles could be good candidates to probe thermal processes as nanothermometers.
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Affiliation(s)
- Antonin Soleilhac
- Institut lumière matière, UMR 5306 Université Claude Bernard Lyon1-CNRS, Université de Lyon , 69622 Villeurbanne, Cedex, France
| | - Marion Girod
- Institut des Sciences Analytiques, UMR 5280/CNRS, ENS Lyon, UCB Lyon 1, Université de Lyon , Villeurbanne, France
| | - Philippe Dugourd
- Institut lumière matière, UMR 5306 Université Claude Bernard Lyon1-CNRS, Université de Lyon , 69622 Villeurbanne, Cedex, France
| | - Béatrice Burdin
- Centre Technologique des Microstructures, Université Claude Bernard Lyon 1 , Bâtiment Darwin B, 5 rue Raphaël Dubois, 69622 Villeurbanne, Cedex, France
| | - Julien Parvole
- Univ. Lyon 1, CPE Lyon, CNRS, UMR 5265, Laboratoire de Chimie, Catalyse, Polymères et Procédés (C2P2), Université de Lyon , 43, Bd. du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Pierre-Yves Dugas
- Univ. Lyon 1, CPE Lyon, CNRS, UMR 5265, Laboratoire de Chimie, Catalyse, Polymères et Procédés (C2P2), Université de Lyon , 43, Bd. du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - François Bayard
- Univ. Lyon 1, CPE Lyon, CNRS, UMR 5265, Laboratoire de Chimie, Catalyse, Polymères et Procédés (C2P2), Université de Lyon , 43, Bd. du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Emmanuel Lacôte
- Hydrazines, et Composés Energétiques Polyazotés (LHCEP), UMR 5278, CNRS, CNES, HERAKLES-SAFRAN, UCBL , Bâtiment Berthollet, 22 Avenue Gaston Berger, 69622 Villeurbanne, Cedex, France
| | - Elodie Bourgeat-Lami
- Univ. Lyon 1, CPE Lyon, CNRS, UMR 5265, Laboratoire de Chimie, Catalyse, Polymères et Procédés (C2P2), Université de Lyon , 43, Bd. du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Rodolphe Antoine
- Institut lumière matière, UMR 5306 Université Claude Bernard Lyon1-CNRS, Université de Lyon , 69622 Villeurbanne, Cedex, France
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17
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Reisch A, Klymchenko AS. Fluorescent Polymer Nanoparticles Based on Dyes: Seeking Brighter Tools for Bioimaging. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:1968-92. [PMID: 26901678 PMCID: PMC5405874 DOI: 10.1002/smll.201503396] [Citation(s) in RCA: 364] [Impact Index Per Article: 45.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Revised: 12/13/2015] [Indexed: 05/13/2023]
Abstract
Speed, resolution and sensitivity of today's fluorescence bioimaging can be drastically improved by fluorescent nanoparticles (NPs) that are many-fold brighter than organic dyes and fluorescent proteins. While the field is currently dominated by inorganic NPs, notably quantum dots (QDs), fluorescent polymer NPs encapsulating large quantities of dyes (dye-loaded NPs) have emerged recently as an attractive alternative. These new nanomaterials, inspired from the fields of polymeric drug delivery vehicles and advanced fluorophores, can combine superior brightness with biodegradability and low toxicity. Here, we describe the strategies for synthesis of dye-loaded polymer NPs by emulsion polymerization and assembly of pre-formed polymers. Superior brightness requires strong dye loading without aggregation-caused quenching (ACQ). Only recently several strategies of dye design were proposed to overcome ACQ in polymer NPs: aggregation induced emission (AIE), dye modification with bulky side groups and use of bulky hydrophobic counterions. The resulting NPs now surpass the brightness of QDs by ≈10-fold for a comparable size, and have started reaching the level of the brightest conjugated polymer NPs. Other properties, notably photostability, color, blinking, as well as particle size and surface chemistry are also systematically analyzed. Finally, major and emerging applications of dye-loaded NPs for in vitro and in vivo imaging are reviewed.
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Affiliation(s)
- Andreas Reisch
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de Strasbourg, Faculté de Pharmacie, 74, Route du Rhin, 67401 ILLKIRCH Cedex, France
| | - Andrey S. Klymchenko
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de Strasbourg, Faculté de Pharmacie, 74, Route du Rhin, 67401 ILLKIRCH Cedex, France
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18
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Sun H, Cao Y, Feng L, Chen Y. Immobilizing photogenerated electrons from graphitic carbon nitride for an improved visible-light photocatalytic activity. Sci Rep 2016; 6:22808. [PMID: 26948968 PMCID: PMC4779999 DOI: 10.1038/srep22808] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 02/19/2016] [Indexed: 11/12/2022] Open
Abstract
Reducing the recombination probability of photogenerated electrons and holes is pivotal in enhancing the photocatalytic ability of graphitic carbon nitride (g-C3N4). Speeding the departure of photogenerated electrons is the most commonly used method of achieving this. To the best of our knowledge, there is no report on suppressing the recombination of photogenerated electron-hole pairs by immobilizing the electrons with ester functional groups. Here, for the first time the mesoporous g-C3N4 (mpg-C3N4) was integrated with polymethyl methacrylate, a polymer abundant in ester groups, which showed a photocatalytic activity unexpectedly higher than that of the original mpg-C3N4 under visible-light irradiation. Experimental observations, along with theoretical calculations, clarified that the impressive photocatalytic ability of the as-modified mpg-C3N4 was mainly derived from the immobilization of photogenerated electrons via an electron-gripping effect imposed by the ester groups in the polymethyl methacrylate. This novel strategy might also be applied in improving the photocatalytic performance of other semiconductors.
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Affiliation(s)
- Han Sun
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, People’s Republic of China
| | - Yue Cao
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, People’s Republic of China
| | - Leiyu Feng
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, People’s Republic of China
| | - Yinguang Chen
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, People’s Republic of China
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19
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Eftekhari E, Cole IS, Li Q. The effect of fluorophore incorporation on fluorescence enhancement in colloidal photonic crystals. Phys Chem Chem Phys 2016; 18:1743-9. [DOI: 10.1039/c5cp06489a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Diffusion-swelling dye incorporation method improves photonic structure-induced emission enhancement.
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Affiliation(s)
- Ehsan Eftekhari
- Queensland Micro- and Nanotechnology Centre, and Environmental Engineering
- Griffith University
- Australia
| | | | - Qin Li
- Queensland Micro- and Nanotechnology Centre, and Environmental Engineering
- Griffith University
- Australia
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20
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Mandal S, Bera R, Das S, Nayak SK, Pramanik A, Patra A. Photon Harvesting in Sunscreen-Based Functional Nanoparticles. Chemphyschem 2015; 16:3618-24. [PMID: 26419334 DOI: 10.1002/cphc.201500780] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Indexed: 11/12/2022]
Abstract
The ultraviolet light component in the solar spectrum is known to cause several harmful effects, such as allergy, skin ageing, and skin cancer. Thus, current research attention has been paid to the design and fundamental understanding of sunscreen-based materials. One of the most abundantly used sunscreen molecules is Avobenzone (AB), which exhibits two tautomers. Here, we highlight the preparation of spherically shaped nanoparticles from the sunscreen molecule AB as well as from sunscreen-molecule-encapsulated polymer nanoparticles in aqueous media and study their fundamental photophysical properties by steady-state and time-resolved spectroscopy. Steady-state studies confirm that the AB molecule is in the keto and enol forms in tetrahydrofuran, whereas the enol form is stable in the case of both AB nanoparticles and AB-encapsulated poly(methyl methacrylate) (PMMA) nanoparticles. Thus, the keto-enol transformation of AB molecules is restricted to a nanoenvironment. An enhancement of photostability in both the nanoparticle and PMMA-encapsulated forms under UV light irradiation is observed. The efficient excited energy transfer (60 %) from AB to porphyrin molecules opens up further prospects in potential applications as light-harvesting systems.
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Affiliation(s)
- Sadananda Mandal
- Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata, 700 032, India.,Department of Chemistry, Vivekananda Mahavidyalaya, Burdwan, Sripally, Burdwan-, 713103, West Bengal, India
| | - Rajesh Bera
- Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata, 700 032, India
| | - Somnath Das
- Unilever R & D Bangalore, 64, Main Road, Whitefield, Bangalore, 560066, India
| | - Sandip K Nayak
- Bio-organic Division, Bhabha Atomic Research Centre, Mumbai-, 400 085, India
| | - Amitava Pramanik
- Unilever R & D Bangalore, 64, Main Road, Whitefield, Bangalore, 560066, India.
| | - Amitava Patra
- Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata, 700 032, India.
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21
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Saeed SES, El-Molla MM, Hassan ML, Bakir E, Abdel-Mottaleb MM, Abdel-Mottaleb MS. Novel chitosan-ZnO based nanocomposites as luminescent tags for cellulosic materials. Carbohydr Polym 2014; 99:817-24. [DOI: 10.1016/j.carbpol.2013.08.096] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 08/26/2013] [Accepted: 08/30/2013] [Indexed: 10/26/2022]
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22
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Wang X, Xu S, Xu W. Synthesis of highly stable fluorescent Ag nanocluster @ polymer nanoparticles in aqueous solution. NANOSCALE 2011; 3:4670-4675. [PMID: 21971881 DOI: 10.1039/c1nr10590f] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Water-soluble, highly stable fluorescent Ag nanoclusters have been synthesized using a novel core/shell solid polymer (PMMA/PMMA-PMAA) nanoparticles as a novel template. The photoluminescence, ultraviolet-visible absorption, X-ray photoelectron (XPS), laser desorption time of flight mass spectroscopies (LDI-ToF-MS) and transmission electron microscopy (TEM) were carried out to characterize the optical properties and morphologies of Ag nanoclusters. The quantum yield of Ag nanoclusters reached 6% and the lifetime of Ag nanoclusters was 0.460 ns. Because of the protective structure of three-dimensional network of the polymer template, the Ag nanoclusters have high stability. And this highly stable fluorescent Ag nanoclusters have successfully been applied for bioimaging.
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Affiliation(s)
- Xumei Wang
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, PR China
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23
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Wang X, Xu S, Liang C, Li H, Sun F, Xu W. Enriching PMMA nanospheres with adjustable charges as novel templates for multicolored dye@PMMA nanocomposites. NANOTECHNOLOGY 2011; 22:275608. [PMID: 21602617 DOI: 10.1088/0957-4484/22/27/275608] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Multicolored fluorescent dye loaded PMMA nanospheres were synthesized by the electrostatic adsorption of dye molecules on the charged PMMA nanospheres, whose charges were adjusted by choosing different initiators. The charged PMMA nanospheres have a wider capacity and advantage for combining the charged dyes. The fluorescent dye@PMMA composite nanospheres possess the advantages of higher brightness, longer lifetime and stronger resistance to photobleaching relative to dye molecules. Dye leakage remained lower than 5% over one week. These fluorescent nanospheres have been used in biological labels in cell imaging. They can easily stain blood cancer cells without further surface modification.
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Affiliation(s)
- Xumei Wang
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, People's Republic of China
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