Abstract

An inclusion complex of Primaquine (PQ) with 2-(Hydroxypropyl)-β-Cyclodextrin (2-HP-β-CD) in liquid state have been investigated by using absorption and fluorescence spectral techniques. From the spectral data, a binding constant (K) and the stoichiometric ratio between the host-guest system is calculated by using the Benesi–Hildebrand equation. Gibb’s free energy changes of the complexation process are spontaneously at room temperature. The host-guest complex of PQ with 2-HP-β-CD is prepared by various methods like physical mixture, kneading, and co-precipitation methods. The solid inclusion complexes are characterized by using FT-IR, SEM, Powder XRD, and DSC analysis. The orientation and structure of the inclusion complex are proposed based on the results of PM3 optimization. Mutual interactions between the guest (PQ) and host (2-HP-β-CD) are identified by NBO analysis. The anticancer activity also performed for pure PQ and its inclusion complex with 2-HP-β-CD. It clearly showed that the solid complex did not enhances in their anticancer activity than PQ alone.

摘要

已经通过使用吸收和荧光光谱技术研究了液态的伯氨喹 (PQ) 与 2-(羟丙基)-β-环糊精 (2-HP-β-CD) 的包合物。根据光谱数据，结合常数 (K) 和主客体系统之间的化学计量比通过使用 Benesi-Hildebrand 方程计算。络合过程的吉布自由能变化是在室温下自发产生的。PQ与2-HP-β-CD的主客体复合物通过物理混合法、捏合法和共沉淀法等多种方法制备。采用 FT-IR、SEM、粉末 XRD 和 DSC 分析对固体包合物进行了表征。基于PM3优化结果提出了包合物的取向和结构。通过 NBO 分析确定来宾 (PQ) 和宿主 (2-HP-β-CD) 之间的相互相互作用。纯 PQ 及其与 2-HP-β-CD 的包合物也具有抗癌活性。它清楚地表明，与单独的百草枯相比，固体复合物的抗癌活性没有增强。