Inclusion Complexation of Phenoxyaliphatic Acid Derivatives of 3,3′-bis(indolyl)methanes with β-Cyclodextrin
作者:A. Antony Muthu Prabhu、G. S. Suresh Kumar
DOI:10.1007/s10895-014-1373-4
日期:2014.5
The inclusion complexation behavior of phenoxyaliphatic acid derivatives of 3,3′-bis(indolyl)methane (BIMs 1–5) with β-cyclodextrin (β-CD) were investigated in both solution and solid state by means of UV-Visible, fluorescence spectroscopy, FT-IR and 1H NMR techniques. The nature of the host–guest inclusion complex between BIMs and β-CD has been elucidated. The experimental results confirmed the existence of 1:1 inclusion complex of BIMs with β-CD. The binding constants describing the extent of formation of the complexes have been determined using Benesi-Hildebrand plots using UV-Vis and fluorescence spectroscopy. BIMs exhibited an affinity for β-CD. The spectral studies suggested the phenyl ring along with alkyl substitutions of BIMs is present inside of β-CD cavity.
通过紫外-可见光谱、荧光光谱、傅立叶变换红外光谱和 1H NMR 技术,研究了 3,3′-双(吲哚基)甲烷的苯氧基脂肪族酸衍生物(BIMs 1-5)与 β-环糊精(β-CD)在溶液和固体状态下的包合物络合行为。阐明了 BIMs 和 β-CD 之间主-客包合物的性质。实验结果证实了 BIMs 与 β-CD 之间存在 1:1 的包合复合物。利用紫外-可见光谱和荧光光谱,通过贝内尼-希尔德布兰德图确定了描述复合物形成程度的结合常数。BIMs 对 β-CD 具有亲和力。光谱研究表明,BIMs 的苯基环和烷基取代物存在于 β-CD 的空腔内。