Pyrylogens: Synthesis, Structural, Electrochemical, and Photophysical Characterization of a New Class of Electron Transfer Sensitizers
作者:Edward L. Clennan、Chen Liao、Erambo Ayokosok
DOI:10.1021/ja802343v
日期:2008.6.18
The synthesis and photophysicalproperties of a new series of dicationic electron transfer sensitizers have been reported. These new materials, pyrylogens, are hybrids of pyrylium cations and Viologen dications. Electron transfer reactions of neutral organic substrates using these new sensitizers generate radical-cation/radical-cation pairs whose repulsive (repellent) interaction is designed to compete
Katritzky, Alan R.; Adamson, Jeffrey; Elisseou, E. Michael, Journal of the Chemical Society. Perkin transactions II, 1982, p. 1041 - 1048
作者:Katritzky, Alan R.、Adamson, Jeffrey、Elisseou, E. Michael、Musumarra, Giuseppe、Patel, Ranjan C.、et al.
DOI:——
日期:——
KATRITZKY, A. R.;ADAMSON, J.;ELISSEOU, E. M.;MUSUMARRA, G.;PATEL, R. C.;S+, J. CHEM. SOC. PERKIN TRANS., 1982, N 9, 1041-1048
作者:KATRITZKY, A. R.、ADAMSON, J.、ELISSEOU, E. M.、MUSUMARRA, G.、PATEL, R. C.、S+
DOI:——
日期:——
Synthesis, Characterization, Photophysics and Photochemistry of Pyrylogen Electron Transfer Sensitizers
作者:Edward L. Clennan、Chen Liao
DOI:10.1111/php.12174
日期:2014.3
of new dicationic sensitizers that are hybrids of pyryliumsalts and viologens has been synthesized. The electrochemical and photophysical properties of these "pyrylogen" sensitizers are reported in sufficient detail to allow rationale design of new photoinduced electron transfer reactions. The range of their reduction potentials (+0.37-+0.05 V vs SCE) coupled with their range of singlet (48-63 kcal
已经合成了一系列新的双敏增感剂,它们是吡喃鎓盐和紫精的混合物。这些“ pyrylogen”敏化剂的电化学和光物理性质已被报道得足够详细,可以合理设计新的光诱导电子转移反应。它们的还原电位范围(+ 0.37- + 0.05 V vs SCE)加上其单重态(48-63 kcal mol(-1))和三重态(48-57 kcal mol(-1))的能量范围表明是在单重态和三重态激发态下均有效的氧化剂,在热力学上能够氧化电位高达3.1 eV的底物。从容易获得的起始原料可分三步合成热原,总收率不高,为11.4-22.3%。这些敏化剂具有以下附加优点:(1)它们的自由基阳离子不会在CV时间尺度上与氧气发生反应,从而绕开了在氮气或氩气下进行反应的需要;(2)在413至523 nm之间的长波长吸收远超出了大多数底物的竞争性吸收范围引起问题。这些新的敏化剂会与水发生反应,需要特殊的预防措施才能在干燥的反应环境中运行。