The results of investigations of the properties of cyanine dye dimers in the triplet state are presented. The formation of dimers is demonstrated as two absorption bands of differing intensities, which are due to splitting of the S*-level of monomers as a result of their resonance interaction. The cyanine dye dimers are characterized by a relatively high quantum yield of the intersystem crossing. In the triplet-triplet absorption spectra two bands appear, where the long-wavelength band is assigned to a charge transfer state. The cyanine dye dimers in the triplet state are involved in the energy and electron transfer and can act as the photosensitizes of redox reactions.

中文翻译：

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花青染料二聚体的三重态

介绍了三重态花青染料二聚体性质的研究结果。二聚体的形成被证明为两个不同强度的吸收带，这是由于单体的 S* 水平分裂导致它们的共振相互作用。花青染料二聚体的特征在于系统间交叉的相对高的量子产率。在三重态-三重态吸收光谱中出现两个带，其中长波长带被指定为电荷转移状态。三重态花青染料二聚体参与能量和电子转移，并可作为氧化还原反应的光敏剂。