Efficient synthesis and characterization of meso-substituted bis(benzothiazolium) pentamethine cyanine dyes and investigation of the impact of meso-substitution on water solubility and the structural rigidity to improve photophysical properties and fluorescent brightness
作者:Fereshteh Azamifar、M. Reza Naimi-Jamal、Oleg M. Demchuk、Agnieszka Szmagara
DOI:10.1016/j.dyepig.2023.111519
日期:2023.10
nontrivial chromatographic separation. The chemical structures of the synthesized dyes were confirmed by HPLC-MS, 1H NMR, 13C NMR, and FTIR techniques. The photophysical properties of the new dyes were investigated in methanol, recognizing that the dyes demonstrate excellent fluorescent brightness. The solutions of the dyes exhibited maximum absorption and fluorescence emission in the range of 600–650 nm
为了获得具有生物应用价值的结构刚性五次甲基花青染料,通过一种有效且简单的三乙胺促进方法,包括各种N-取代苯并噻唑鎓盐与无需进行繁琐的色谱分离即可以高产率和高纯度预形成 β-取代的维脒盐。合成染料的化学结构通过HPLC-MS、1 H NMR、1313C NMR 和 FTIR 技术。在甲醇中研究了新型染料的光物理性质,发现这些染料表现出优异的荧光亮度。染料溶液在600-650 nm范围内表现出最大吸收和荧光发射,具有高摩尔吸收系数(约1-3 × 10 5 dm 3 mol −1 cm -1 ),在610-670 nm范围内具有显着的荧光量子产量,分别。此外,在甲醇中研究了合成染料的光稳定性和光致发光稳定性,揭示了它们出色的稳定性和抗光分解性。检查染料的光化学行为(紫外线)不同极性的有机溶剂验证了各种内消旋取代对分子结构刚性和顺反异构化改善光物理性能的主要作用。聚次甲基链中吡啶鎓取代基环的