曲克芦丁镧配合物的制备和机理探讨

为了探讨曲克芦丁镧配合物的形成条件及配位作用机理,利用分光光度法测定了不同反应条件对曲克芦丁镧配合物的紫外吸收的影响,并通过紫外-可见分光光度计、红外光谱仪和液相色谱仪对配合物的结构进行表征.研究结果表明,曲克芦丁结构中的氧与镧离子发生配位作用,推测曲克芦丁结构中4位上的羰基氧和5位上的羟基氧参与配位反应形成配合物;制备曲克芦丁镧配合物的适宜条件为:曲克芦丁与镧的物质的量比为2∶1、反应时间4h、反应温度55℃和反应体系pH值为7.

Synthesis and Coordination Mechanism of Complex of Troxerutin and Lanthanum

In order to research the prepared conditions of the complex of troxerutin and lanthanum and its coordination mechanism, the ultraviolet absorption of the complex in different reaction conditions were measured by using spetrophotometry, and the complex of troxerutin and lanthanum was characterized by ultraviolet visible spectrophotometer （UV）, infrared spectrometer （IR）, and high performance liquid chromatograph （HPLC）. The results show that the coordination reaction occurred between the groups containing oxygen and Laa＋ , coordination mechanism is that the carbonyl oxygen on 4th position of troxerutin and the hydroxyl oxygen on 5th position reacts with La3＋ , and then forms coordination bond~ the optimum conditions for preparing the complex of troxerutin with lanthanum are the ratio of troxerutin and lanthanum 2 ： 1, the reaction time 4 h, temperature 55 ℃, and the solution pH 7.0.