Cyanoethynylethenes: A Class of Powerful Electron Acceptors for Molecular Scaffolding We thank the ETH Research Council and the Fonds der Chemischen Industrie for their support of this work. Robin Gist is acknowledged for the supply of starting materials.
Donor-Substituted Cyanoethynylethenes: π-Conjugation and Band-Gap Tuning in Strong Charge-Transfer Chromophores
作者:Nicolle N. P. Moonen、William C. Pomerantz、Robin Gist、Corinne Boudon、Jean-Paul Gisselbrecht、Tsuyoshi Kawai、Atsushi Kishioka、Maurice Gross、Masahiro Irie、François Diederich
DOI:10.1002/chem.200500082
日期:2005.5.20
combination of 13C NMR spectroscopic and electrochemistry measurements. Donor-substituted CEEs display strong intramolecularcharge-transfer (CT) character, resulting in intense, bathochromically shifted CT bands in the UV/Vis spectrum. Their structural diversity establishes them as suitable models for the study of pi-conjugation and band gap tuning in strong charge-transfer chromophores. The extent of pi-conjugation
合成了一系列广泛的甲硅烷基保护的氰基乙炔(CEE)和N,N-二甲基苯胺基供体取代的CEE。通过选择性的甲硅烷基脱保护和随后的氧化炔键偶联,可以构建更多的发色团。通过13 C NMR光谱学和电化学测量的结合揭示了CEE的强电子接受性质。供体取代的CEE表现出很强的分子内电荷转移(CT)特性,导致在UV / Vis光谱中出现强烈的红移的CT带。它们的结构多样性使它们成为研究强电荷转移生色团的π共轭和能带隙调谐的合适模型。通过结合基态技术研究了供体取代的CEE中pi共轭的程度,例如X射线晶体学,电化学,B3 LYP计算和NMR光谱学。将这些基态结果与在UV / Vis光谱中观察到的特征进行比较后发现,与预期相反,更广泛的pi共轭可导致具有强供体和受体部分的分子带隙更大。
Cyanoethynylethenes: A Class of Powerful Electron Acceptors for Molecular Scaffolding We thank the ETH Research Council and the Fonds der Chemischen Industrie for their support of this work. Robin Gist is acknowledged for the supply of starting materials.
作者:Nicolle N. P. Moonen、Corinne Boudon、Jean-Paul Gisselbrecht、Paul Seiler、Maurice Gross、François Diederich