N, N '-Dibutylbarbituric acid as an acceptor moiety in push-pull chromophores

Twelve novel D-pi-A chromophores with the N, N'-dibutylbarbituric acid acceptor, the N, N-dimethylamino donor and a systematically extended pi-linker were synthesized. The extent of intramolecular charge-transfer, structure-property relationships and nonlinear optical properties were further investigated by X-ray analysis, electrochemistry, UV/Vis absorption spectra, calculations and EFISH experiments