Cheng Heung-Kiu, Chung Clive Yik-Sham, Zhang Kaka, Yam Vivian Wing-Wah
Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong.
Chem Asian J. 2017 Jul 4;12(13):1509-1516. doi: 10.1002/asia.201700123. Epub 2017 Mar 23.
Platinum(II)-containing polystyrene (PS) complexes have been synthesized by dehydrohalogenation of α-alkyne-PS and chloroplatinum(II) precursors with different functionalities on the terpyridine ligands. Through modulation of the hydrophilicity/hydrophobicity of the terpyridine ligands and hence the overall amphiphilicity of the complexes, the complexes can undergo self-assembly into various superstructures with remarkable luminescence properties in different solution mixtures, as revealed by electron microscopy, UV/Vis absorption and emission spectroscopy. Pt⋅⋅⋅Pt and/or π-π interactions among the platinum(II) terpyridine moieties are found to play substantial roles in the stabilization of the superstructures and the turn-on/off of the triplet metal-metal-to-ligand charge transfer ( MMLCT) emission of the complexes.
通过α-炔基聚苯乙烯（PS）与氯铂（II）前体在三联吡啶配体上进行不同官能团的脱卤化氢反应，合成了含铂（II）的聚苯乙烯（PS）配合物。通过调节三联吡啶配体的亲水性/疏水性以及配合物的整体两亲性，配合物可以在不同的溶液混合物中自组装成具有显著发光特性的各种超结构，这通过电子显微镜、紫外/可见吸收和发射光谱得以揭示。发现铂（II）三联吡啶部分之间的Pt⋅⋅⋅Pt和/或π-π相互作用在超结构的稳定以及配合物的三重态金属-金属到配体电荷转移（MMLCT）发射的开启/关闭中起着重要作用。
