81090-61-1Relevant academic research and scientific papers
Effect of π-bridge groups based on indeno[1,2-: b] thiophene D-A-π-A sensitizers on the performance of dye-sensitized solar cells and photocatalytic hydrogen evolution
Chu, Yanmeng,Ding, Haoran,Hu, Yue,Hua, Jianli,Xu, Mengyu,Ye, Haoran,Zhang, Shicong
supporting information, p. 14864 - 14872 (2020/11/17)
Donor-acceptor-π-acceptor (D-A-π-A) organic dyes are promising candidates for efficient dye-sensitized solar cells (DSCs) and photocatalytic H2 evolution due to their high range of visible-light response and strong light-capturing capabilities. However, the low charge transfer rate and severe charge recombination at the interface still limit their photovoltaic performance and photocatalytic activities. In this work, three indeno[1,2-b]thiophene-based sensitizers (SD1, SD2 and SD3) with a 2,3-diphenylquinoxaline (QT) auxiliary acceptor and cyclopentadithiophene (CPDT)-benzene/thiophene/furan different π-bridge moieties have been synthesized and applied in DSCs and photocatalytic H2 production to investigate the effect of the π-bridge moiety on the photovoltaic performance and photocatalytic activities. Optical/electrochemical data and density functional theory (DFT) calculations clearly showed that the introduction of a benzene π-bridge in SD1 resulted in a large torsional angle between CPDT and benzene, and then inhibited dye aggregation and charge recombination. Therefore SD1-based DSCs exhibited the highest power conversion efficiency (PCE) of 8.96% under one sun illumination. In addition, among the three sensitizers, the SD2 containing thiophene π-bridge unit exhibited the best hydrophilicity and planarity with a torsional angle a remarkable H2 evolution rate of 23.5 mmol g-1 h-1 was obtained over the SD2?Pt/TiO2 photocatalyst. This journal is
Indene thiophthene donor based D-A-pi-A type dye and application thereof
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Paragraph 0067; 0068; 0069, (2017/07/22)
The invention relates to an indene thiophthene donor based D-A-pi-A type dye and application thereof. Indene thiophthene serves as a donor unit which is chemically modified (namely one end of the donor unit is connected with electron donating groups to serve as a donor while the other end of the donor unit is connected with different conjugation units and electron withdrawing groups to realize adsorption on TiO2) to obtain the indene thiophthene donor based D-A-pi-A type dye. According to experiments, the indene thiophthene donor based D-A-pi-A type dye has unique photoelectrochemical properties and can be used as a photosensitization agent for dye-sensitized solar cells. In addition, the indene thiophthene donor based D-A-pi-A type dye has advantages of easiness in preparation, low cost and the like and has a commercial application prospect.
A facile, regioselective and controllable bromination of aromatic amines using a CuBr2/Oxone system
Li, Xin-Le,Wu, Wei,Fan, Xin-Heng,Yang, Lian-Ming
, p. 12091 - 12095 (2013/09/02)
A combination of cupric bromide and Oxone serves as a facile, mild and effective reagent for the bromination of aromatic amines. Primary, secondary and tertiary aromatic amines are all suitable substrates. The reaction possesses high regioselectivity and functional group tolerance, and mono- and multi-brominated products can be obtained controllably in moderate to excellent yields. The Royal Society of Chemistry 2013.
