The photophysical properties of platinum(II) compounds with 4-(9-anthryl)-2,6-bis(thiazol-2-yl)pyridine (1) and 4-(1-pyrenyl)-2,6-bis(thiazol-2-yl)pyridine (2) were widely investigated. In DMSO and MeCN, the triplet emission of (1) and (2) most probably experiences the solvent-induced exciplex quenching and both complexes exhibit ligand-based fluorescence with maxima in the range of 468–570 nm. In non-coordinating dichloromethane, the emission of (1) and (2) shifts to longer wavelengths, and the lifetimes in microseconds are indicative of phosphorescence. The formation of the triplet excited state was further supported by the observation of singlet oxygen photoluminescence in the near-IR at 1270 nm. To explore the nature of the triplet excited state, the emission properties of (1) and (2) in low temperature glasses were analysed in comparison with those for free ligands and appropriate hydrocarbons, as well as transient absorption spectra were recorded in femtosecond and nanosecond regimes. The studies revealed that the lowest energy triplet state of both complexes is an admixture of ³ILCT and ³(π–π*)aryl character, but the contribution of the ³ILCT state in (1) originating from anthracene to 2,6-bis(thiazol-2-yl)pyridine can be determined as rather negligible.

中文翻译：

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为了更好地理解具有蒽和pyr取代的2,6-双（噻唑-2-基）吡啶的铂（II）配位化合物的光物理性质。

带有4-（9-蒽基）-2,6-双（噻唑-2-基）吡啶（1）和4-（1-吡啶基）-2,6-双（噻唑）的铂（II）化合物的光物理性质-2-基）吡啶（2）被广泛研究。在DMSO和MeCN中，（1）和（2）的三重态发射最有可能经历了溶剂诱导的激基复合物猝灭，并且两种复合物均显示出基于配体的荧光，最大值在468–570 nm范围内。在非配位二氯甲烷中，（1）和（2）移到更长的波长，并且以微秒为单位的寿命表示磷光。通过在1270nm处的近红外中观察到单线态氧的光致发光，进一步支持了三线态激发态的形成。为了探索三重激发态的性质，分析了低温玻璃中的（1）和（2）与自由配体和适当的碳氢化合物的发射特性，并记录了飞秒和纳秒的瞬态吸收光谱政权。研究表明，两种配合物的最低能量三重态是³ ILCT和³（π–π *）芳基特性的混合物，但³ ILCT状态在（1）可以确定源自蒽的2，6-双（噻唑-2-基）吡啶。