Fluorescent Styryl Dyes Based on Novel 4-Methoxy-9-Methyi-9H-Carbazole-3-Carbaldehyde—Synthesis, Photophysical Properties and DFT Computations
作者:Prashant G. Umape、Yogesh Gawale、Nagaiyan Sekar
DOI:10.1007/s10895-014-1389-9
日期:2014.7
Novel carbazole based styryl derivatives (6a–6c) having styryl group at third position and a methoxy substitution were synthesized by condensing 4-methoxy-9-methyl-9H-carbazole-3-carbaldehyde 3 and different active methylene derivatives (5a–5c). Evaluated photophysical properties of these synthesized novel chromophores, studied the effect of solvent polarity on absorption, emission and quantum yield of these styryl derivatives. DFT and TD-DFT computations are carried out to study structural, molecular, electronic and photophysical parameters of dyes. The ratio of ground state to excited state dipole moment was calculated using Bakhshiev and Kawski-Chamma-Viallet correlations.
新型的咔唑基苯乙烯衍生物(6a-6c),其在第三位具有苯乙烯基团和一个甲氧基取代,通过4-甲氧基-9-甲基-9H-咔唑-3-甲醛3与不同的活性亚甲基衍生物(5a-5c)缩合合成。评估了这些合成的新型染料的光物理性质,研究了溶剂极性对这些苯乙烯衍生物的吸收、发射和量子产率的影响。进行DFT和TD-DFT计算以研究染料的结构、分子、电子和光物理参数。利用Bakhshiev和Kawski-Chamma-Viallet关联计算了基态和激发态偶极矩的比率。