Instituto de Física, Universidade Federal de Goiás, Caixa Postal 131, 74001-970 Goiânia, GO, Brazil.
Spectrochim Acta A Mol Biomol Spectrosc. 2011 Sep;79(5):1532-9. doi: 10.1016/j.saa.2011.05.012. Epub 2011 May 18.
Porphyrins are an important class of organic molecules, with interesting linear and nonlinear optical properties given mainly by their extended π-conjugation structure. Their photophysical properties can be greatly affected by the surrounding environment, which can be used to tune its final properties. Here we report on an experimental study of the photophysical properties of meso-tetrakis (methylpyridiniumyl) porphyrin (TMPyP) in aqueous and in several organic solvents and its interaction with micelles formed from negatively charged sodium dodecylsulphate (SDS), positively charged cetyl trimethyl ammonium bromide (CTAB) and neutral TRITON X-100. By using the Z-scan technique, flash-photolysis and time-resolved fluorescence techniques, we were able to evaluate the excited state dynamics of the TMPyP, and observed that the tetrapyrrole ring plays important role due to hydrogen bonds formation between nitrogen atom and water, while the side groups determine the porphyrin localization in non-aqueous micelle part.
卟啉是一类重要的有机分子，由于其扩展的π共轭结构，具有有趣的线性和非线性光学性质。其光物理性质可以受到周围环境的极大影响，从而可以对其最终性质进行调节。在本文中，我们报道了在水溶液中和几种有机溶剂中，间四（甲基吡啶基）卟啉（TMPyP）的光物理性质及其与由带负电荷的十二烷基硫酸钠（SDS）、带正电荷的十六烷基三甲基溴化铵（CTAB）和中性 Triton X-100 形成的胶束相互作用的实验研究。通过使用 Z 扫描技术、闪光光解和时间分辨荧光技术，我们能够评估 TMPyP 的激发态动力学，并观察到四吡咯环由于氮原子与水之间形成氢键而起到重要作用，而侧基则决定了卟啉在非水胶束部分的定位。
