期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 98, 期 -, 页码 275-281出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2012.08.016
关键词
Amantadine hydrochloride; Rimantadine hydrochloride; Coptisine; Cucurbit[7]uril; Supramolecular interaction; Fluorescent probe
类别
资金
- Research Fund for the Doctoral Program of Higher Education of China [20091404110001]
Amantadine hydrochloride (AMA) and rimantadine hydrochloride (RIM) are non-fluorescent in aqueous solutions. This property makes their determination through direct fluorescent method difficult. The competing reactions and the supramolecular interaction mechanisms between the two drugs and coptisine (COP) as they fight for occupancy of the cucurbit[7]uril (CB[7]) cavity, were studied using spectrofluorimetry, H-1 NMR, and molecular modeling calculations. Based on the significant quenching of the supramolecular complex fluorescence intensity, a fluorescent probe method of high sensitivity and selectivity was developed to determine AMA or RIM in their pharmaceutical dosage forms and in urine samples with good precision and accuracy. The linear range of the method was from 0.0040 to 1.0 mu g mL(-1) with a detection limit ranging from 0.0012 to 0.0013 mu g mL(-1). This shows that the proposed method has promising potential for therapeutic monitoring and pharmacokinetics and for clinical application. (C) 2012 Elsevier B.V. All rights reserved.
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