作者:Wen Hui Hao、Pengfei Yan、Guangming Li、Zhi Yuan Wang
DOI:10.1016/j.dyepig.2014.06.005
日期:2014.12
A new class of short-conjugated zwitterionic cyanopyridinium chromophores with the absorption maxima less than 550 nm were designed and synthesized. These chromophores display a good solubility in organic solvents and exist in a charge-separated ground state, as confirmed by IR, X-ray crystallography, negative solvatochromism and fluorescence studies. They can be doped up to 10% by weight into poly(ether