Influence of the angle between two crown ether moieties on supramolecular copolymerization of bis(crown ether)s and bisparaquat homoditopic monomers

被引：2
|
作者：
Zhou QiZhong [1 ]
Jiang HuaJiang [1 ]
Ding Liang [2 ]
Wang Feng [2 ]
Wu Tao [2 ]
机构：
[1] Taizhou Univ, Dept Chem, Taizhou 317000, Peoples R China
[2] Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China
来源：
SCIENCE CHINA-CHEMISTRY | 2010年 / 53卷 / 05期
基金：
美国国家科学基金会;
关键词：
bis(crown ether); bisparaquat homoditopic monomers; angle; supramolecular copolymerization; SELF-ORGANIZATION; CRYSTAL-STRUCTURE; POLYMER FORMATION; GUEST DIMERS; HOST; COMPLEXATION; RECOGNITION; RELEASE;
D O I：
10.1007/s11426-010-0152-6
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Bis(crown ether) homoditopic monomers containing two bis(p-phenylene)-34-crown-10 moieties with different angles (180 degrees for monomer 3, 120 degrees for monomer 4, and 60 degrees for monomer 5) and a complementary bisparaquat homoditopic monomer (7) were designed and synthesized. The three bis(crown ether) monomers could organize into linear supramolecular polymers in concentrated solutions in CHCl(3)/CH(3)CN with the bisparaquat monomer 7, as demonstrated by (1)H NMR and viscosity studies. The pseudorotaxanes or supramolecular polymers formed from 3+7 and 4+7 had larger values of K(a), p, n, slope 1, and slope 2 than those of 5+7. This result was attributed to the greater steric hindrance of compound 5 than that of 3 and 4, which resulted in less effective formation of linear supramolecular polymers from 5 with compound 7 than those from compounds 3 and 4 with compound 7, as also demonstrated by UV-vis method.
引用
收藏
页码：1081 / 1088
页数：8
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