Polymorphism of Amino Acid-Based Dendrons: From Organogels to Microcrystals

被引：23
|
作者：
Kuang, Gui-Chao [1 ,2 ]
Teng, Ming-Jun [1 ,2 ]
Jia, Xin-Ru [1 ,2 ]
Chen, Er-Qiang [1 ,2 ]
Wei, Yen [3 ]
机构：
[1] Peking Univ, Coll Chem & Mol Engn, Minist Educ, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China
[2] Peking Univ, Coll Chem & Mol Engn, Minist Educ, Key Lab Polymer Chem & Phys, Beijing 100871, Peoples R China
[3] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
来源：
CHEMISTRY-AN ASIAN JOURNAL | 2011年 / 6卷 / 05期
基金：
中国国家自然科学基金;
关键词：
amino acids; beta sheets; dendrons; polymorphism; self-assembly; DENDRITIC ORGANOGELATORS; GELATION PROPERTIES; SELF-ORGANIZATION; MOLECULAR-WEIGHT; BLOCK DENDRONS; FIBER NETWORK; ARCHITECTURE; BEHAVIOR; GELS; MORPHOLOGY;
D O I：
10.1002/asia.201000529
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
There is a delicate balance for a low-weight molecule to behave as a gelator or crystal. The synthesis of two novel amino acid-based naphthalene-dendrons, Nap-G1 and Nap-G2 is described. Both dendrons display polymorphic properties in organic solvents. Nap-G1 developed a fibrous network with beta-sheet architecture in cyclohexane but exhibited a spherulitic network in mixed solvents (chloroform/petroleum ether 1: 5, v/v). On the other hand, Nap-G2 acted as an efficient organogelator in chloroform but formed crystalline fibers in relatively high polarity solvents (such as acetone and methanol). Combinations of characterizations have been employed to study the polymorphism.
引用
收藏
页码：1163 / 1170
页数：8
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