Photophysical properties of ESIPT inspired fluorescent 2-(2-hydroxyphenyl)-6-methylimidazo[4,5-f]isoindole-5,7(1H,6H)-dione and its derivative: Experimental and DFT based approach
作者:Mininath S. Deshmukh、Nagaiyan Sekar
DOI:10.1016/j.saa.2014.07.021
日期:2015.1
The excited-state intramolecular proton transfer chromophores 2-(2-hydroxyphenyl)-6-methylimidazo[4,5-f]isoindole-5,7(1H,6H)-dione and 2-(4-(diethylamino)-2-hydroxyphenyl)-6-methylimidazo[4,5-f]isoindole-5,7(1H,6H)-dione are synthesized from 4,5-diamino-N-methylphthalimide. The photophysical behavior of the synthesized chromophores was studied using UV-visible and fluorescence spectroscopy in the polar
激发态分子内质子转移发色团2-(2-羟苯基)-6-甲基咪唑并[4,5-f]异吲哚-5,7(1H,6H)-二酮和2-(4-(二乙氨基)-2-羟基苯基)-6-甲基咪唑并[4,5-f]异吲哚-5,7(1H,6H)-二酮是由4,5-二氨基-N-甲基邻苯二甲酰亚胺合成的。使用紫外可见光和荧光光谱在极性和非极性溶剂中研究了合成发色团的光物理行为。合成的邻羟基苯基苯并咪唑衍生物具有荧光性,并且对溶剂极性非常敏感。这些染料在高达317°C的温度下具有热稳定性。密度泛函理论计算已用于了解生色团的结构,分子,电子和光物理性质。