Four Pt(II)(N^N^N) compounds featuring DMSO coordination at the fourth position were synthesized. Ligands varied in terms of pyridyl central ring (hydrogen/chlorine substituent) and lateral rings (triazoles with CF₃ substitution or tetrazoles). Coordination to pyridine yielded tetra-nitrogen coordinated Pt(II) complexes or Pt-functionalized polymers using commercial 4-pyridyl polyvinyl (PV) or dimethylaminopyridine. Luminescence behaviors exhibited remarkable environmental dependence. While some of the molecular compounds (tetrazole derivatives) in solid state displayed quenched luminescence, all the polymers exhibited ³MMLCT emission around 600 nm. Conversely, monomer emission was evident on poly(methyl methacrylate) or polystyrene matrices. DFT calculations were used to analyze the aggregation of the complexes both at the molecular level and coordinated to the PV polymer and their influence on the HOMO–LUMO gaps.

中文翻译：

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研究包装和环境因素对 Pt(N^N^N) 发色团发光的影响


合成了四种在第四位具有 DMSO 配位特征的 Pt(II)(N^N^N) 化合物。配体在吡啶基中心环（氢/氯取代基）和侧环（具有CF ₃取代的三唑或四唑）方面有所不同。使用商业 4-​​吡啶基聚乙烯 (PV) 或二甲氨基吡啶与吡啶配位产生四氮配位 Pt(II) 配合物或 Pt 官能化聚合物。发光行为表现出显着的环境依赖性。虽然一些固态分子化合物（四唑衍生物）表现出猝灭发光，但所有聚合物都表现出 600 nm 左右的³ MMLCT 发射。相反，在聚（甲基丙烯酸甲酯）或聚苯乙烯基质上单体发射很明显。 DFT 计算用于分析复合物在分子水平上的聚集以及与光伏聚合物的配位及其对 HOMO-LUMO 间隙的影响。