電子光譜及動力學方法研究環糊精包結體系

UV-vis and Stopped Flow Studies on Methyl Orange/Cyclodextrin Systems

魯潤華(Run-Hua Lu) ； 夏春谷(Chun-Gu Xia) ； 汪漢卿(Han-Qing Wang) ； 童林薈(Lin-Hui Tong)

《化學》 56卷2期 (1998/06) Pp. 89-94

https://doi.org/10.6623/chem.1998012

摘要

用紫外光譜法研究了甲基體(MO)與α-，β-CD 包結體系， 並用停留反應動力學方法(stopped flow) 研究了α-CD-MO 包結體系的動力學。α-CD 與MO的反應為準一級，α-CD 溫度與所測得的速率k_(obs)之間存在線性關係，由此計算了體系的正、逆反應速率，並得到體系在室溫下、pH 1.4 時的結合常數。

關鍵字

甲基橙 ； 環糊精 ； 紫外光譜 ； 停留反應動力學

並列摘要

Inclusion complexes of α-, β-CD with methyl orange (MO) have been investigated by Uv-visible spectroscopy, and inclusion reactions of α-CD with MO have also been studied in aqueous solutions by means of stopped-flow method. The inclusion process of α-CD with MO follows one-step reaction mechanism, and fits pseudo-first-order reaction model. There is a linelar relationship between α-CD concentration and the observed rate data (k_(obs)), and thus the forward and backward rate constants are determined.

並列關鍵字

Methyl orange ； Cyclodextrin ； UV-vis spectroscopy ； Stopped flow