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金属超分子胶束的蒙特卡罗模拟

Monte carlo simulations of metallo-supramolecular micelles.

作者信息

Wang Shihu, Dormidontova Elena E

机构信息

Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, USA.

出版信息

Macromol Rapid Commun. 2010 May 12;31(9-10):897-903. doi: 10.1002/marc.200900900. Epub 2010 Mar 4.

Abstract

Using Monte Carlo simulations we show that the equilibrium properties of metallo-supramolecular micelles are determined by the competition of 2:1 and 1:1 metal-ligand complexation in the bulk and on the surface as well as steric interactions between the neighboring corona blocks attached to the surface. We predict that by increasing the association energy for the second metal-ligand bond, or decreasing the corona block length one can achieve a larger core surface coverage for metallo-supramolecular micelles. Compared to covalently bonded block copolymer micelles, we show that metallo-supramolecular micelles have smaller monomer and end group density, especially in the vicinity of the core, which may lead to experimentally observed aggregation.

摘要

通过蒙特卡罗模拟,我们表明金属超分子胶束的平衡性质由本体和表面上2:1与1:1金属 - 配体络合的竞争以及附着在表面的相邻冠层嵌段之间的空间相互作用决定。我们预测,通过增加第二个金属 - 配体键的缔合能或减小冠层嵌段长度,可以实现金属超分子胶束更大的核表面覆盖率。与共价键合的嵌段共聚物胶束相比,我们表明金属超分子胶束具有较小的单体和端基密度,特别是在核附近,这可能导致实验观察到的聚集现象。

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