Self-assembly of a triple-zwitterion in polar solutions: hierarchical formation of nanostructures

Self-assembly of a triple-zwitterion in polar solutions: hierarchical formation of nanostructures
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极性溶液中三两性离子的自组装:纳米结构的分层形成

DOI:
10.1039/c2sm07153c
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发表时间:
2012
期刊:
影响因子:
3.4
通讯作者:
C. Schmuck
C. Schmuck
中科院分区:
化学2区
文献类型:
--
作者:
T. Rehm;F. Gröhn;C. Schmuck

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The self-assembly of triple-zwitterion 1 in dimethyl sulfoxide is described. 1 forms dimers which polymerize upon increasing concentration into flexible twisted ribbons. These ribbons finally coil into soft nanospheres. The step-wise aggregation process is primarily based on the very strong tendency of the self-complementary guanidiniocarbonyl pyrrole carboxylate zwitterion to form H-bond assisted ion paired dimers (K > 1010 M−1 in DMSO). Using a variety of analytical techniques such as diffusion ordered NMR spectroscopy (DOSY NMR), small angle neutron scattering (SANS), as well as atomic force microscopy (AFM) and molecular modelling for visualization, a consistent picture of the hierarchical self-assembly process of triple-zwitterion 1 in solution is obtained.
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