Improvement of the quadratic non-linear optical properties of pyrimidine chromophores by N-methylation and tungsten pentacarbonyl complexation
作者:Sylvain Achelle、Samia Kahlal、Alberto Barsella、Jean-Yves Saillard、Xiaoyang Che、Julien Vallet、Filip Bureš、Bertrand Caro、Françoise Robin-le Guen
DOI:10.1016/j.dyepig.2014.09.028
日期:2015.2
In this contribution, we report the synthesis of two series of compounds: 4-(arylvinyl)-1-methylpyrimidinium derivatives and tungsten pentacarbonyl complexes of 4-(arylvinyl)pyrimidines. Their second order non-linear properties, measured by Electric-Field Induced Second Harmonic generation (EFISH) method, and their photophysical behavior were thoroughly investigated and compared to the corresponding 4-(arylvinyl) pyrimidines. A strong enhancement of the NLO response was observed upon methylation or complexation by W(CO)(5) of the pyrimidine ring. DFT theoretical calculations were performed to provide complementary insights on the structure-properties relationships in particular concerning the amplitude of the NLO response. (C) 2014 Elsevier Ltd. All rights reserved.