Spectral and luminescent properties of aqueous solutions of 5,10,15,20-tetrakis(3-N-methylpyridyl)porphyrin are studied at 290 ± 2 K. Individual absorption and fluorescence spectra are identified for atropisomers resulting from different orientations of the methylated N atom of the Py substituents relative to the mean plane of the tetrapyrrole macrocycle.

中文翻译：

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水溶液中5,10,15,20-四（3-N-甲基吡啶基）卟啉的阻转异构体的光谱和发光性质

研究了5,10,15,20-四（3-N-甲基吡啶基）卟啉水溶液在290±2 K下的光谱和发光特性。确定了甲基化N的不同取向导致的阻转异构体的吸收光谱和荧光光谱相对于四吡咯大环的平均平面的Py取代基的原子。