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

被引：8
|
作者：
Rehm, Thomas H. [1 ]
Groehn, Franziska [2 ,3 ,4 ]
Schmuck, Carsten [1 ]
机构：
[1] Univ Duisburg Essen, Inst Organ Chem, D-45141 Essen, Germany
[2] Univ Erlangen Nurnberg, Dept Chem & Pharm, D-91058 Erlangen, Germany
[3] Univ Erlangen Nurnberg, Interdisciplinary Ctr Mol Mat, D-91058 Erlangen, Germany
[4] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
来源：
SOFT MATTER | 2012年 / 8卷 / 11期
关键词：
SMALL-ANGLE SCATTERING; PYRROLE CARBOXYLATE ZWITTERION; INDIRECT TRANSFORMATION METHOD; FLEXIBLE BIS-ZWITTERION; PEPTIDE NANOTUBES; SUPRAMOLECULAR STRUCTURES; BUILDING-BLOCKS; HYDROPHOBIC DIPEPTIDES; GUANIDINIUM CATIONS; FORCE MICROSCOPY;
D O I：
10.1039/c2sm07153c
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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 > 10(10) 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.
引用
收藏
页码：3154 / 3162
页数：9
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