新型多维取代吡啶内盐有机染料的合成及其光谱性能和电化学性质初探

Synthesis of novel multidimensional substituted pyridinium dyes and their spectral-electrochemical properties

以吡啶内盐为电子受体,通过Knoevenagel缩合反应连接不同取代数目、不同结构的电子给体,合成了系列新型的多维取代吡啶内盐有机染料,利用NMR、HRMS等对其结构进行了表征。初步考察了该类染料的光谱性能和电化学性质,结果表明,三取代吡啶内盐摩尔消光系数显著高于单取代和二取代化合物,并具有较宽的吸收谱带,而三苯胺给电子基团三取代的吡啶内盐表现出优异的电化学性能。

With pyridinium inner salt as electron aceeptor, a series of novel multidimensional substituted pyridinium salt dyes were synthesized by Knoevenagel condensation reaction with different number of electron donors. The structures of the organic dyes were characterized by NMR and HRMS, and their spectroscopic and electrochemical properties were preliminary investigated. The results showed that the molar extinction coefficients of the polysubstituted pyridinium dyes are much higher than that of the single substituted ones. The trisubstituted pyridinium inner salt with triphenylamine as electron acceptor showed nice electrochemical properties.