异丙肾上腺素和甲基多巴与α-和β-环糊精纳米腔的包合作用：光谱和理论研究。
Inclusion complexation of isoprenaline and methyl dopa with α- and β-cyclodextrin nanocavities: spectral and theoretical study.
机构信息
Department of Chemistry, Annamalai University, Annamalai Nagar 608 002, Tamil Nadu, India.
Department of Chemistry, Annamalai University, Annamalai Nagar 608 002, Tamil Nadu, India.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Mar 25;122:411-21. doi: 10.1016/j.saa.2013.10.112. Epub 2013 Nov 9.
Inclusion complex formation of isoprenaline (ISOP) and methyldopa (MDOP) with α-CD and β-CD were investigated. Solid inclusion complex nanomaterials were characterized by SEM, TEM, FTIR, DSC, (1)H NMR and XRD methods. Spectral results showed that single emission (monomer) noticed in aqueous solution where as dual emission (excimer) in CD. Both drugs formed 1:2 (CD-drug2) inclusion complexes with CDs. Time-resolved fluorescence studies show that single exponential decay observed in water whereas biexponential decay observed in CD. Nano-sized particles were found in ISOP/CD while vesicles were obtained in MDOP/CD complexes. DSC results revealed that the thermal stability of drugs was improved when it was included in the CD nanocavity. Based on PM3 calculations, the inclusion structure of ISOP/CD and MDOP/CD complexes were proposed. Thermodynamic parameters and binding affinity of complexation of CD were determined by PM3 method.
采用 SEM、TEM、FTIR、DSC、（1）H NMR 和 XRD 等方法对异丙肾上腺素（ISOP）和甲基多巴（MDOP）与 α-CD 和 β-CD 的包合复合物纳米材料进行了表征。光谱结果表明，在水溶液中观察到单发射（单体），而在 CD 中观察到双发射（激基复合物）。两种药物均与 CDs 形成 1:2（CD-药物 2）包合复合物。时间分辨荧光研究表明，在水中观察到单指数衰减，而在 CD 中观察到双指数衰减。在 ISOP/CD 中发现纳米级颗粒，而在 MDOP/CD 复合物中则获得囊泡。DSC 结果表明，当药物包含在 CD 纳米腔内时，其热稳定性得到提高。基于 PM3 计算，提出了 ISOP/CD 和 MDOP/CD 配合物的包合结构。通过 PM3 方法确定了 CD 的热力学参数和配合物的结合亲和力。
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