Kim Ka Young, Kim Jaehyeong, Moon Cheol Joo, Liu Jinying, Lee Shim Sung, Choi Myong Yong, Feng Chuanliang, Jung Jong Hwa
Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, Republic of Korea.
School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
Angew Chem Int Ed Engl. 2019 Aug 19;58(34):11709-11714. doi: 10.1002/anie.201905472. Epub 2019 Jul 19.
We demonstrated the morphology transformation of co-assemblies based on terpyridine-based ligands (1R and 1S) possessing R- or S-alanine analogues and their platinum(II) complex (2R-Pt and 2S-Pt). The right-handed helical ribbon of the co-assembly formed with 0.5 equivalents of 2R-Pt to 1R was converted into the left-handed helical ribbon with 0.6 equivalents of 2R-Pt. The left-handed helical ribbon structure of the co-assembly became a tubular structure in the presence of 0.8-1.0 equivalents of 2R-Pt. The morphology transformation via helical inversion at the supramolecular level was due to an orientation change of the amide groups caused by non-covalent Pt⋅⋅⋅Pt interactions between the terpyridine of 2R-Pt and that of 2R-Pt. This study provides insights into controlling the morphology of the transformation of helical ribbons into tubular structures through helicity inversion in co-assembled supramolecular nanostructures based on platinum(II) complexes.
我们展示了基于含有R-或S-丙氨酸类似物的三联吡啶配体（1R和1S）及其铂（II）配合物（2R-Pt和2S-Pt）的共组装体的形态转变。由0.5当量的2R-Pt与1R形成的共组装体的右手螺旋带在加入0.6当量的2R-Pt时转变为左手螺旋带。在存在0.8 - 1.0当量的2R-Pt时，共组装体的左手螺旋带结构变成了管状结构。超分子水平上通过螺旋反转的形态转变是由于2R-Pt的三联吡啶之间非共价的Pt⋅⋅⋅Pt相互作用导致酰胺基团的取向变化。这项研究为基于铂（II）配合物的共组装超分子纳米结构中通过螺旋反转控制螺旋带向管状结构转变的形态提供了见解。
