Photophysical properties and photochemical transformations of Neutral Red (NR) dye in water in the presence of cucurbit[7]uril (CB7) were studied by absorption, fluorescence, and laser kinetic spectroscopies. Phototransformations of NR involve the triplet state of the dye and the production of NR radical cations and radical anions. The formation of inclusion complexes NR@CB7 was detected. The quantum yield of fluorescence and the efficiency of intersystem crossing to the triplet state increase in the presence of CB7.

中文翻译：

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葫芦[7]脲存在下水溶液中中性红染料的光转化

通过吸收、荧光和激光动力学光谱研究了在葫芦 [7] 脲 (CB7) 存在下中性红 (NR) 染料在水中的光物理性质和光化学转化。NR 的光转化涉及染料的三重态和 NR 自由基阳离子和自由基阴离子的产生。检测到包合物NR@CB7的形成。在 CB7 的存在下，荧光的量子产率和系统间穿过三重态的效率增加。