Cycloaddition reactions of polyenic donor–π-acceptor systems with an electron-rich alkyne: access to new chromophores with second-order optical nonlinearities
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.