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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Guest induced morphological transformation from nanospheres to nanowires by hydrogen bond self-assembly
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Guest induced morphological transformation from nanospheres to nanowires by hydrogen bond self-assembly

机译：访客通过氢键自组装诱导从纳米球到纳米线的形态转变

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摘要

Phosphorescent nanospheres of a carboxyl-functionalized iridium complex ([Ir(ppy)_2(Hdcbpy)], ppy: 2-phenylpyridine; Hdcbpy: 4-carboxy-2,2′-bipyridyl-4′-carboxylate) were prepared by a conventional precipitation method. Driven by hydrogen bond interaction between carboxylic groups of the complex and the guest molecule tris(imidazoline), these nanospheres can be transformed into 1-dimensional nanowires in the presence of tris(imidazoline) at the concentration of the iridium complex higher than 4.8 mM, while nanowires change back to nanospheres with the diameter obviously smaller than that of the sole complex of [Ir(ppy)_2(Hdcbpy)]. The interaction between carboxylic groups and tris(imidazoline) molecules was confirmed by FT-IR spectra. The structures of the nanowires and nanospheres were further studied by XRD diffraction analysis. With the morphological transformation from nanospheres to nanowires, the phosphorescence of nanostructures was blue shifted from 590 to 564 nm.
机译：羧基官能化铱配合物的磷光纳米球（[Ir（ppy）_2（Hdcbpy）]，ppy：2-苯基吡啶; Hdcbpy：4-羧基-2,2'-联吡啶基-4'-羧酸盐）沉淀法。在配合物和客体分子tris（咪唑啉）的羧基之间通过氢键相互作用驱动，在存在tris（咪唑啉）的情况下，当铱配合物的浓度高于4.8 mM时，这些纳米球可以转变为一维纳米线，而纳米线又变回纳米球，其直径明显小于[Ir（ppy）_2（Hdcbpy）]的唯一复合物的直径。通过FT-IR光谱证实了羧基与三（咪唑啉）分子之间的相互作用。通过XRD衍射分析进一步研究了纳米线和纳米球的结构。随着从纳米球到纳米线的形态转变，纳米结构的磷光从590 nm蓝移到564 nm。

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