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- Title
A Phosphorescent Platinum(II) Bipyridyl Supramolecular Polymer Based on Quadruple Hydrogen Bonds.
- Authors
Liu, Fang‐Wei; Niu, Li‐Ya; Chen, Yong; Ramamurthy, Vaidhyanathan; Wu, Li‐Zhu; Tung, Chen‐Ho; Chen, Yu‐Zhe; Yang, Qing‐Zheng
- Abstract
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.
- Subjects
SUPRAMOLECULAR polymers synthesis; PLATINUM compound synthesis; HYDROGEN bonding interactions; BIPYRIDINE derivatives; MOLECULAR self-assembly; NANOPARTICLE synthesis
- Publication
Chemistry - A European Journal, 2016, Vol 22, Issue 50, p18132
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201603467