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首页> 外文期刊>Chemistry: A European journal >A Phosphorescent Platinum(II) Bipyridyl Supramolecular Polymer Based on Quadruple Hydrogen Bonds
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A Phosphorescent Platinum(II) Bipyridyl Supramolecular Polymer Based on Quadruple Hydrogen Bonds

机译：基于四氢键的磷光铂（II）联吡啶超分子聚合物

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摘要

A platinum(II) bipyridyl complex bearing bis-ureidopyrimidinone (Pt-bisUPy) has been designed and its self-assembling behavior has been thoroughly investigated by H-1 NMR, DOSY NMR, Ubbelohde viscometry analysis, UV/Vis, and emission spectroscopies. Pt-bisUPy underwent concentration-dependent ring-chain polymerization in apolar solvents. Hydrogen-bonding interactions play an important role during the formation of the supramolecular polymers. Hydrogen-bonded supramolecular polymers were transformed to nanoparticles in water through the miniemulsion method. These nanoparticles showed strong pi-pi excimeric emission. Metal-metal-to-ligand charge transfer (MMLCT) from Pt-Pt interactions was not significant in the emission spectrum. The phosphorescence of the nanoparticle persisted even under aerobic conditions. The triplet state of these phosphorescent nanomaterials were long-lived and possessed moderate emission quantum yields. Furthermore, the low toxicity of these materials promises a place for them in in vitro and in vivo bioimaging.
机译：设计了带有双-脲基嘧啶酮（Pt-bisUPy）的铂（II）联吡啶配合物，并通过H-1 NMR，DOSY NMR，Ubbelohde粘度分析，UV / Vis和发射光谱对它的自组装行为进行了彻底的研究。 Pt-bisUPy在非极性溶剂中进行了浓度依赖性的环链聚合。氢键相互作用在超分子聚合物的形成过程中起重要作用。通过细乳液法将氢键键合的超分子聚合物在水中转化为纳米颗粒。这些纳米颗粒显示出强烈的pi-pi激基发光。 Pt-Pt相互作用产生的金属-金属-配体电荷转移（MMLCT）在发射光谱中不显着。即使在有氧条件下，纳米颗粒的磷光仍然持续。这些磷光纳米材料的三重态是长寿命的，并具有中等的发射量子产率。此外，这些材料的低毒性为它们在体外和体内生物成像中占有一席之地。

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