期刊
SUPRAMOLECULAR CHEMISTRY
卷 27, 期 1-2, 页码 37-43出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/10610278.2014.904866
关键词
cucurbituril; supramolecular structure; phenazine; host-guest interaction; macrocyclic compound
资金
- National Natural Science Foundation of China [21162003]
- International Collaboration Project of Guizhou Province [[2011]7003]
- Natural Science Foundation of Guizhou Province [[2008]75]
The host-guest interactions between phenazine hydrochloride salt (PheH(+)) and hemicucurbit[n]uril (n=6 or 12) (HemiQ[6 or 12]) have been studied by H-1 NMR, UV-vis, IR, mass spectrometry (MS) and quantum chemistry. In H-1 NMR spectra, the broadening of proton resonances of the hosts suggests the interactions of PheH(+) with HemiQs. The quantitative stabilities of the host-guest systems have been obtained by UV-vis titration experiments, that is, the stoichiometric interactions of PheH(+) with HemiQ[6] have been observed with an association constant of K-a=(2.5 +/- 1.2)x10(6)Lmol(-1), while the 2:1 ratio complexes of PheH(+) with HemiQ[12] are formed with stepwise association constants of K-1=(9.2 +/- 2.8)x10(4)Lmol(-1) and K-2=(6.4 +/- 0.9)x10(5)Lmol(-1), respectively, which induce a total association constant of K-a=5.9x10(10)L(2)mol(-2). Both the 1:1 and 2:1 complexes have been detected by MS. Quantum chemistry calculations have been used to understand the static structures and thermodynamic stabilities of the supramolecular assemblies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据