Author/Authors :
Andreu ، نويسنده , , Raquel and Galلn، نويسنده , , Elena and Garيn، نويسنده , , Javier and Orduna، نويسنده , , Jesْs and Alicante، نويسنده , , Raquel and Villacampa، نويسنده , , Belén، نويسنده ,
Abstract :
A series of merocyanines with a benzothiazolylidene donor and a quinoidal thiazole moiety have been synthesized. Experimental results and theoretical calculations show that these compounds have zwitterionic ground states and negative second-order optical nonlinearities. Unlike most merocyanines, the degree of charge transfer does not decrease on increasing the separation between the donor and the acceptor groups, an unexpected feature related to the presence of the proaromatic thiazole fragment.
