Abstract

New indium(III) and gallium(III) meso-tetra(benzo-15-crown-5) porphyrinates are synthesized. The structure of complexes is determined from spectroscopy data. A comparative analysis of the luminescent properties of new compounds at temperatures of 298 and 77 K is performed. The indium(III) and gallium(III) crown-porphyrinates are established to exhibit fluorescent behavior at a temperature of 298 K, while phosphorescence radiation is totally absent at this temperature for both complexes. At the nitrogen boiling point (77 K), the two complexes give off both fluorescent and phosphorescent radiation. The prepared compounds can be interesting as luminescent temperature sensors operating on the basis on the intensity ratio between fluorescence and phosphorescence transitions in the temperature range of 77–203 K. The energies of triplet levels in indium(III) and gallium(III) crown-porphyrinate molecules suggest that the new compounds are capable of producing singlet molecular oxygen. Evidently, the new compounds can also be of interest as photosensitizers in photodynamic therapy of tumors.

中文翻译：

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新型镓（III）和铟（III）15冠-5-取代卟啉的合成，结构和光物理性质

摘要

新的铟（III）和镓（III）中观合成了四（苯并-15-冠-5）卟啉。配合物的结构由光谱数据确定。对新化合物在298和77 K的温度下的发光性能进行了比较分析。铟（III）和镓（III）冠卟啉被建立为在298 K的温度下表现出荧光行为，而在此温度下，两种配合物都完全不发出磷光辐射。在氮沸点（77 K）处，两种络合物均发出荧光和磷光辐射。制备的化合物作为发光温度传感器，基于在77-203 K的温度范围内荧光和磷光跃迁之间的强度比，可以引起人们的兴趣。铟（III）和镓（III）冠卟啉分子中三重态能级的能量表明，新化合物能够产生单线态分子氧。显然，新化合物也可以作为光敏剂用于肿瘤的光动力治疗。