Effect of Modified Donor Units on Molecular Hyperpolarizability of Thienyl-Vinylene Nonlinear Optical Chromophores

Xianmin Zhang, Isao Aoki, Xianqing Piao, Shin-ichiro Inoue, Hidehisa Tazawa,
Shiyoshi Yokoyama, Akira Otomo


Abstract

Highly efficient and thermally stable nonlinear optical chromophores based on the phenyl vinylene thiophene vinylene (FTC) donor--acceptor structure have been synthesized and investigated. The donor part of the chromophores was modified with additional donor units, resulting in the enhanced nonlinear optical property with large molecular hyperpolarizability. Hyper-Rayleigh scattering measurement indicated nearly three-fold increase of the molecular hyperpolarizability for novel chromophores compared with the benchmark FTC chromophore. Furthermore, measurement of the electro-optic coefficient confirmed that enhancement of microscopic molecular hyperpolarizability of the chromophores can be effectively translated into macroscopic electro-optic property . Measure electro-optic coefficients were nearly twofold larger than that for the benchmark FTC. Thermal analysis indicated that the synthesized chromophores showed the excellent temperature stability with decomposition temperatures up to 280 .


Graphical abstract



doi:10.1016/j.tetlet.2010.08.060