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photoinduced energy transfer and charge transfer on squarylium cyanine dyes

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Chinese Journal of Chemistry 1998年第6期16卷 499-508页

作者：赵为张宝文侯原军曹怡 Photochemistry Laboratory Institute of Photographic ChemistryChinese Academy of SciencesBeijing 100101China

A series of squarylium cyanine dyes (Sqs) were synthesised to explore their applications in functional devices. Preliminary investigation on the mechanism involved in these devices was carried out. Spectroscopic behavior of Sqs with porphyrin (P), 8-hydroxyquinolium aluminum (Alq) and ruthenium bipyridyl complex (Ru(bipy)) in solution, in film and on nanocrystalline TiO2 was investigated, respectively. A mechanism including photoinduced energy transfer and charge transfer processes was suggested in the corresponding practical devices. By means of doping, a red organic electroluminescent device (ELD) using Sq-doped Alq as the emission layer (EML) has been developed, and the total light to electricity efficiency of nanocrystalline TiO2 electrode based on using Sq-doped Ru(bipy) M photosensitizer has been improved greatly in the whole visible region, particularly in the red area above 600 nm.

关键词： Electroluminescence photoinduced energy transfer photoinduced charge transfer photoelectric conversion

Understanding the correlation between energy-state mismatching and open-circuit voltage loss in bulk heterojunction solar cells

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Carbon Energy 2024年第5期6卷 164-174页

作者： Hyun-Seock Yang Danbi Kim Chang-Mok Oh Vellaiappillai Tamilavan Pesi MHangoma Hojun Yi Bo RLee Insoo Shin In-Wook Hwang Sung Heum Park Pukyong National University BusanRepublic of Korea Clarendon Laboratory University of OxfordOxfordUK Institute of Energy Transport and Fusion Research Pukyong National UniversityBusanRepublic of Korea Advanced Photonics Research Institute Gwangju Institute of Science and TechnologyGwangjuRepublic of Korea Department of Chemical and Biomolecular Engineering Tandon School of EngineeringNew York UniversityBrooklynNew YorkUSA

photoinduced intermolecular charge transfer(PICT)determines the voltage loss in bulk heterojunction(BHJ)organic photovoltaics(OPVs),and this voltage loss can be minimized by inducing efficient PICT,which requires energy-state matching between the donor and acceptor at the BHJ ***,both geometrically and energetically accessible delocalized state matching at the hot energy level is crucial for achieving efficient *** this study,an effective method for quantifying the hot state matching of OPVs was *** degree of energy-state matching between the electron donor and acceptor at BHJ interfaces was quantified using a mismatching factor(MF)calculated from the modified optical density of the ***,the correlation between the open-circuit voltage(Voc)of the OPV device and energy-state matching at the BHJ interface was investigated using the calculated *** OPVs with small absolute MF values exhibited high Voc *** result clearly indicates that the energy-state matching between the donor and acceptor is crucial for achieving a high Voc in *** the MF indicates the degree of energy-state matching,which is a critical factor for suppressing energy loss,it can be used to estimate the Voc loss in OPVs.

关键词： bulk heterojunction open circuit voltage organic photovoltaics photoinduced charge transfer voltage loss

A More Efficient Synthetic Route to Perylene-porphyrin Arrays

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Chinese Chemical Letters 2003年第11期14卷 1105-1108页

作者： Xin Guo YANG Jing Zhi SUN Mang WANG Hong Zheng CHEN Department of Polymer Science&Engineering State Key Laboratory for Silicon MaterialsZhejiang UniversityHangzhou 310027

We present an efficient synthetic route towards two kinds of perylene-porphyrin arrays. Starting from 5, 10, 15, 20-meso-tetraphenylporphyrin, two novel 9a and 9b were designed and synthesized with 40.3% and 35.1% yi... 详细信息

关键词： Perylene-porphyrin arrays photoinduced charge transfer molecular switch.

Highly sensitive fluorescence detection of chloride ion in aqueous solution with Ag-modified porous g-C_(3)N_(4) nanosheets

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Chinese Chemical Letters 2020年第10期31卷 2725-2729页

作者： Zishu Zhang Ying Gao Peng Li Binhong Qu Zhiyuan Mu Yang Liu Yang Qu Degui Kong Qing Chang Liqiang Jing College of Electronic Engineering Heilongjiang UniversityHarbin 150080China Key Laboratory of Functional Inorganic Materials Chemistry(Ministry of Education) International Joint Research Center for Catalytic TechnologySchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China College of Physical Science and Technology Heilongjiang UniversityHarbin 150080China College of Media Engineering Communication University of ZhejiangHangzhou 310018China

The porous g-C_(3)N_(4)(PCN)nanosheets are successfully synthesized and further modified with nano-sized Ag by a simple wet-chemical *** stingly,the Ag-modified porous g-C_(3)N_(4)(Ag-PCN)nanosheets exhibit competitive fluorescence detection performance of chloride ion(Cl)in aqueous solutio *** the optimized conditions,the concentration of Cl could be quantitative analyzed with the Ag-PCN in a wide detection range from 0.5 mmol/L to 0.1 mol/L,with a low detection limitation of 0.06 mmol/*** is confirmed that the fluorescence of PCN could be effectively decayed by the photoinduced charge transfer via the adsorbed Cl for trapping holes,mainly by means of the time-resolved fluorescence and surface photo voltage *** porous structure and modified Ag promote the adsorption of Cl on resulting Ag-PCN,leading to excellent fluorescence detection for *** work provides a feasible route to develop a fluorescence detection of Cl with g-C_(3)N_(4) nanosheets in environment water.

关键词： g-C_(3)N_(4) Ag-modification Chloride ion Fluorescence detection photoinduced charge transfer

Photo-induced Intramolecular charge transfer in Strained Organic Cage Containing Orthogonally Arranged Donors and Acceptors

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CCS Chemistry 2024年第8期6卷 1920-1928页

作者： Jingxuan Yang Run Shi Liang-Liang Mao Hongyan Xiao Yi Zeng Guohong Liao Yuxiang Weng Xu-Bing Li Jiaqi Zhao Yunxuan Zhao Tierui Zhang Chen-Ho Tung Li-Zhu Wu Huan Cong Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190 Key Laboratory of Bio-Inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190 Beijing National Laboratory for Condensed Matter Physics Laboratory of Soft Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049 Binzhou Institute of Technology Weiqiao-UCAS Science and Technology ParkBinzhou CityShandong 256606 Songshan Lake Materials Laboratory DongguanGuangdong 523808

Designing and creating molecular structures with precisely organized organic chromophores as donors and acceptors are critical for exploring photo-induced charge transfer *** and acceptor moieties can be incorporated to the confined skeletons of organic cages,thereby offering opportunities tomanipulate excited state characters for the development of novel photofunctional ***,we present the convergent synthesis and photophysical characterizations of an organic cage with anisotropic *** strained and rigid cage can be concisely prepared by connecting two distinct macrocycles through axial stacking strategy,featuring triarylamine and amide moieties as separate donors and acceptors,***-state and time-resolved spectra reveal photo-induced through-space intramolecular charge transfer and long-lived charge separation,thereby verifying the cage’s photocatalytic utility for efficient hydrogen production.

关键词： organic cage macrocycles photoinduced charge transfer through-space photocatalytic hydrogen evolution