Maliszewski Paczkowski Ingrid, da Silva Pluczinski Lidiane, Franciscato Campo Leandra
Institute of Chemistry, Department of Organic Chemistry, Universidade Federal do Rio Grande do Sul. Avenida Bento Gonçalves, 9500, CEP 91501-970, Porto Alegre, RS, Brazil.
J Fluoresc. 2024 Mar;34(2):809-819. doi: 10.1007/s10895-023-03284-2. Epub 2023 Jun 29.
Dyes derived from benzothiazoles are an important class of heterocycles which have remarkable photophysical properties. New photoluminescent 2-phenylbenzothiazole derivatives containing different functional groups were synthesized in high yields and used for silylated derivatives synthesis. The new photoactive compounds were fully characterized and their photophysical properties were investigated. The absorption and fluorescence spectra of the benzothiazoles and their silylated derivatives were evaluated in a series of organic solvents. The results showed that the benzothiazoles present absorption in the ultraviolet range and emission in the blue region with moderate quantum yields and large Stokes shift. The solvatochromism of these compounds was investigated by using Lippert and E(30) Dimroth-Reichardt empirical solvent polarity scales. The dipole moments obtained by Bakshiev and Kawaski-Chamma-Viallet equations revealed that the excited states were more polar than the ground states.
源自苯并噻唑的染料是一类重要的杂环化合物，具有显著的光物理性质。高产率合成了含不同官能团的新型光致发光2-苯基苯并噻唑衍生物，并用于硅烷化衍生物的合成。对新型光活性化合物进行了全面表征，并研究了它们的光物理性质。在一系列有机溶剂中评估了苯并噻唑及其硅烷化衍生物的吸收光谱和荧光光谱。结果表明，苯并噻唑在紫外区域有吸收，在蓝色区域有发射，量子产率适中，斯托克斯位移较大。利用Lippert和E(30) Dimroth-Reichardt经验溶剂极性标度研究了这些化合物的溶剂化显色现象。通过Bakshiev和Kawaski-Chamma-Viallet方程获得的偶极矩表明，激发态比基态更具极性。
