Synthesis and stability studies of conformationally locked 4-(diarylamino)aryl- and 4-(dialkylamino)phenyl-substituted second-order nonlinear optical polyene chromophores
nonlinear opticalproperties were related to the ground-state polarisation and the resonance structure of the chromophores. In order to reveal the influence of the length of the polymethinic chain (number of pi electrons within the chromophore), some lower homologues shortened by one C=C (double) bond were also taken into account. The unexpectedly high gamma values of some of the merocyanines cannot be
Synthesis and stability studies of conformationally locked 4-(diarylamino)aryl- and 4-(dialkylamino)phenyl-substituted second-order nonlinear optical polyene chromophores
作者:Katrin Staub、Galina A. Levina、Stephen Barlow、Tony C. Kowalczyk、Hilary S. Lackritz、Marguerite Barzoukas、Alain Fort、Seth R. Marder
DOI:10.1039/b208024a
日期:2003.3.19
A series of chromophores with high second-order nonlinearities has been synthesized; the chromphores consist of triarylamine or dialkylarylamine donors linked by a conformationally locked polyene bridge to a dicyanomethylidene acceptor. The use of bridges of this type, combined with the replacement of dialkylarylamine with triarylamine donors, leads to high thermal stability without adverse affects on the nonlinear optical properties of the chromophores.