Yang Ronghua, Li Ke'an, Wang Kemin, Liu Feng, Li Na, Zhao Fenglin
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2003 Jan 1;59(1):153-61. doi: 10.1016/s1386-1425(02)00147-6.
The supramolecular interactions of beta-cyclodextrin(beta-CD) and four kinds of alkylated beta-cyclodextrin (beta-CDs), i.e. heptakis (2,6-di-O-isobutyl)-beta-cyclodextrin (Ob-beta-CD), heptakis (2,6-di-O-n-octyl)-beta-cyclodextrin (Oc-beta-CD), heptakis (2,6-di-O-n-dodecyl)-beta-cyclodextrin (Od-beta-CD) and heptakis (2,6-di-O-n-hexadecyl)-beta-cyclodextrin (Oh-beta-CD) with tetrakis(4-methoxylphenyl)porphyrin (TMOPP) have been investigated by Rayleigh light scattering (RLS) technique. Beta-CDs form 2:1 inclusion complex with TMOPP following an obvious RLS enhancement of TMOPP. The inclusion abilities of different beta-CDs were compared. The results show that the inclusion ability of beta-CDs is related to the size of the alkylated substituent. Thus, a new mechanism of inclusion interaction has been proposed. The exact stoichiometric ratios and the association constants of the inclusion complexes have been examined by application of curve fitting method.
采用瑞利光散射（RLS）技术研究了β-环糊精（β-CD）以及四种烷基化β-环糊精，即七（2,6-二-O-异丁基）-β-环糊精（Ob-β-CD）、七（2,6-二-O-正辛基）-β-环糊精（Oc-β-CD）、七（2,6-二-O-正十二烷基）-β-环糊精（Od-β-CD）和七（2,6-二-O-正十六烷基）-β-环糊精（Oh-β-CD）与四（4-甲氧基苯基）卟啉（TMOPP）的超分子相互作用。β-环糊精与TMOPP形成2:1的包合物，伴随TMOPP的瑞利光散射明显增强。比较了不同β-环糊精的包合能力。结果表明，β-环糊精的包合能力与烷基化取代基的大小有关。因此，提出了一种新的包合相互作用机制。通过应用曲线拟合方法研究了包合物的确切化学计量比和缔合常数。
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