536992-67-3Relevant academic research and scientific papers
Development of triarylamine mediator having ionic-tag and its application to electrocatalytic reaction in ionic liquid
Takahashi, Kohta,Furusawa, Takashi,Sawamura, Takahiro,Kuribayashi, Shunsuke,Inagi, Shinsuke,Fuchigami, Toshio
, p. 47 - 53 (2012)
Novel triarylamine (Ar3N) mediators bearing an ionic-tag moiety were synthesized from 4,4′-dibromotriphenylamine. Their electrochemical properties were investigated by cyclic voltammetry both in organic solvent and ionic liquid HF salt. The electrocatalytic reactions such as deprotection and fluorodesulfurization of dithioacetals were successfully carried out using these Ar3N mediators in an undivided cell at room temperature.
Molecular Engineering of UV/Vis Light-Emitting Diode (LED)-Sensitive Donor–π–Acceptor-Type Sulfonium Salt Photoacid Generators: Design, Synthesis, and Study of Photochemical and Photophysical Properties
Wu, Xingyu,Jin, Ming,Xie, Jianchao,Malval, Jean-Pierre,Wan, Decheng
supporting information, p. 15783 - 15789 (2017/10/20)
A series of donor–π–acceptor-type sulfonium salt photoacid generators (PAGs) were designed and synthesized by systematically changing electron-donating groups, π-conjugated systems, electron-withdrawing groups, and the number of branches through molecular engineering. These PAGs can effectively decompose under UV/Vis irradiation from a light-emitting diode (LED) light source because of the matching absorption and emitting spectra of the LEDs. The absorption and acid-generation properties of these sulfonium salts were elucidated by UV/Vis spectroscopy and so forth. Results indicated that the PAG performance benefited from the introduction of strong electron-donating groups, specific π-conjugated structures, certain electron-withdrawing groups, or two-branched structures. Most sulfonium salts showed potential as photoinitiators under irradiation by a wide variety of UV and visible LEDs.
Dinuclear cyclometalated iridium (III) complex containing functionalized triphenylamine core: synthesis, photophysics and application in the single-emissive-layer WOLEDs
He, Keqi,Su, Ning,Junting, Yu,Liu, Yu,Xiong, Wenjing,Hao, Zhaoran,Ma, Dongge,Zhu, Weiguo
, p. 7164 - 7169 (2016/10/22)
To obtain highly efficient white-emitting devices, a novel functionalized dinuclear iridium (III) complex of C8TPA(FIrpic)2was successfully synthesized and characterized. In this phosphor, FIrpic is a blue-emitting phosphorescent chr
Tuning the HOMO energy levels of organic dyes for dye-sensitized solar cells based on Br-/Br3- electrolytes
Teng, Chao,Yang, Xichuan,Li, Shifeng,Cheng, Ming,Hagfeldt, Anders,Wu, Li-Zhu,Sun, Licheng
supporting information; scheme or table, p. 13127 - 13138 (2011/02/24)
A series of novel metal-free organic dyes TC301-TC310 with relatively high HOMO levels were synthesized and applied in dye-sensitized solar cells (DSCs) based on electrolytes that contain Br-/Br3- and I-/I3-. The effects of additive Li+ ions and the HOMO levels of the dyes have an important influence on properties of the dyes and performance of DSCs. The addition of Li+ ions in electrolytes can broaden the absorption spectra of the dyes on TiO2 films and shift both the LUMO levels of the dyes and the conduction band of TiO2, thus leading to the increase of Jsc and the decrease of Voc. Upon using Br-/Br3- instead of I-/I3-, a large increase of Voc is attributed to the enlarged energy difference between the redox potentials of electrolyte and the Fermi level of TiO2, as well as the suppressed electron recombination. Incident photon to current efficiency (IPCE) action spectra, electrochemical impedance spectra, and nanosecond laser transient absorption reveal that both the electron collection yields and the dye regeneration yields (Φr) depend on the potential difference (the driving forces) between the oxidized dyes and the Br-/Br 3- redox couple. For the dyes for which the HOMO levels are more positive than the redox potential of Br-/Br3 - sufficient driving forces lead to the longer effective electron-diffusion lengths and almost the same efficient dye regenerations, whereas for the dyes for which the HOMO levels are similar to the redox potential of Br-/Br3-, insufficient driving forces lead to shorter effective electron-diffusion lengths and inefficient dye regenerations. A new middleman: The Br-/Br3- redox mediator was proved to be a promising alternative to I-/I 3- for application in dye-sensitized solar cells (see graphic). Studies show that the energy gap between the HOMO level of the dye and the potential of the Br-/Br3- redox mediator influences their charge-transfer processes and solar-energy conversion efficiency.
