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Supramolecular assembly of bent dinuclear amphiphilic alkynylplatinum(ii) terpyridine complexes: diverse nanostructures through subtle tuning of the mode of molecular stacking†
Chemical Science ( IF 8.4 ) Pub Date : 2019-11-27 , DOI: 10.1039/c9sc04475b
Sam Ka-Ming Leung 1, 2, 3, 4 , Alan Kwun-Wa Chan 1, 2, 3, 4 , Sammual Yu-Lut Leung 1, 2, 3, 4 , Ming-Yi Leung 1, 2, 3, 4 , Vivian Wing-Wah Yam 1, 2, 3, 4
Affiliation  

A new class of bent amphiphilic alkynylplatinum(II) terpyridine complexes was found to adopt different modes of molecular stacking to give diverse nanostructures. In chlorinated solvents, the complexes aggregate in the presence of water droplets and assist in the formation of porous networks, while in DMSO solutions, they self-assemble to give fibrous nanostructures. The complexes would adopt a head-to-tail tetragonal stacking arrangement, as revealed by X-ray crystallographic studies, computational studies and powder X-ray diffraction (PXRD) studies. Their self-assembly follows a cooperative growth mechanism in DMSO and an isodesmic growth mechanism in DMSO–H2O mixture. The balance between hydrophobic and hydrophilic components of the complex system, in conjunction with the nuclearity and the positioning of the substituents, are found to govern the mode of molecular stacking and the fabrication of precise functional nanostructures. This class of complexes serve as versatile building blocks to construct orderly packed molecular materials and functional materials in a well-controlled manner.

中文翻译:

弯曲的双核两亲性炔铂(ii)联吡啶配合物的超分子组装:通过微调分子堆叠模式来改变纳米结构

发现一类新的弯曲两亲性炔基铂(II)吡啶吡啶配合物采用了不同的分子堆叠方式,以提供不同的纳米结构。在氯化溶剂中,络合物在水滴的存在下聚集并有助于形成多孔网络,而在DMSO溶液中,它们会自组装以形成纤维纳米结构。X射线晶体学研究,计算研究和粉末X射线衍射(PXRD)研究表明,这些配合物将采用从头到尾的四边形堆积方式。它们的自组装遵循DMSO中的协同生长机制和DMSO–H 2中的等渗生长机制。O混合物。发现复杂体系的疏水和亲水组分之间的平衡,以及核基和取代基的位置,决定了分子堆叠的模式和精确的功能纳米结构的制造。这类配合物可作为通用的构建基块,以良好控制的方式构建有序堆积的分子材料和功能材料。
更新日期:2020-01-15
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