Cycloaddition reactions of polyenic donor–π-acceptor systems with an electron-rich alkyne: access to new chromophores with second-order optical nonlinearities
作者:Elena Galán、Raquel Andreu、Javier Garín、Jesús Orduna、Belén Villacampa、Beatriz E. Diosdado
DOI:10.1039/c2ob26515j
日期:——
The formal [2 + 2] cycloadditionâcycloreversion (CAâCR) between 4-ethynyl-N,N-dimethylaniline and polyenic DonorâÏ-Acceptor (DâÏ-A) systems takes place to yield compounds bearing two donors and one acceptor. Structural, linear and second-order nonlinear optical (NLO) properties of the new molecules reveal the stronger polarization of these systems when compared to analogous merocyanines lacking the dimethylaminophenyl (DMA) ring.
4- 乙炔基-N,N-二甲基苯胺与多烯供体-Ï-受体(DâÏ-A)体系之间发生了正式的[2 + 2]环加成-环氧化反应(CAâCR),生成了含有两个供体和一个受体的化合物。新分子的结构、线性和二阶非线性光学(NLO)特性表明,与缺少二甲基氨基苯基(DMA)环的类似美拉尼蒽相比,这些体系具有更强的偏振性。