Reversible luminescence switching accompanied by assembly-disassembly of metallosupramolecular amphiphiles based on a platinum(II) complex

Reversible luminescence switching accompanied by assembly-disassembly of metallosupramolecular amphiphiles based on a platinum(II) complex
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基于铂(II)络合物的金属超分子两亲物伴随组装-分解的可逆发光切换

DOI:
10.1039/c2tc00318j
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发表时间:
2013-01
影响因子:
6.4
通讯作者:
Bu, Weifeng
Bu, Weifeng
中科院分区:
材料科学2区
文献类型:
--
作者:
Liu, Nijuan;Wang, Baoyan;Liu, Weisheng;Bu, Weifeng

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阴离子表面活性剂的静电自组装与阳离子铂(II)配合物轴承三甘醇导致形成金属超分子两亲物与棒状和片状聚集体在水溶液中。所得溶液显示出强烈的发光增强,其可以通过用α-环糊精进行主客体识别来分解聚集体而降低回到铂(II)络合物的原始发射强度。通过紫外-可见吸收和发射光谱以及动态光散射对自组装和分解过程进行了真实的实时监测。通过发射光谱和动态光散射的浓度依赖性测量来确定临界聚集浓度。本研究为制备动态金属超分子两亲物提供了一种简便有效的方法。
The electrostatic self-assembly of anionic surfactants with a cationic platinum(II) complex bearing triethylene glycol leads to the formation of metallosupramolecular amphiphiles with rod- and sheet-like aggregates in aqueous solutions. The resulting solutions show strong luminescence enhancement, which can decrease back to the original emissive intensity of the platinum(II) complex by disassembling the aggregates through host–guest recognition with α-cyclodextrin. Both the self-assembly and disassembly processes are monitored in real time by UV-vis absorption and emission spectra and dynamic light scattering. The critical aggregation concentrations are determined by concentration-dependent measurements of emission spectra and dynamic light scattering. The present study provides an efficient and convenient strategy to fabricate dynamic metallosupramolecular amphiphiles with controllable photophysical properties.
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