A Phosphorescent Platinum(II) Bipyridyl Supramolecular Polymer Based on Quadruple Hydrogen Bonds
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- 作者：Fang-Wei Liu ; Dr. Li-Ya Niu ; Prof. Yong Chen ; Prof. Vaidhyanathan Ramamurthy ; Prof. Li-Zhu Wu ; Prof. Chen-Ho Tung ; Prof. Yu-Zhe Chen and Prof. Qing-Zheng Yang
- 刊名：Chemistry - A European Journal
- 出版年：2016
- 出版时间：December 12, 2016
- 年：2016
- 卷：22
- 期：50
- 页码：18132-18139
- 全文大小：1911K
- ISSN：1521-3765
文摘
A platinum(II) bipyridyl complex bearing bis-ureidopyrimidinone (Pt-bisUPy) has been designed and its self-assembling behavior has been thoroughly investigated by 1H 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 π–π 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.