Complexation of uranium(VI) with aromatic acids such as hydroxamic and benzoic acid investigated by TRLFS
Complexation of uranium(VI) with aromatic acids such as hydroxamic and benzoic acid investigated by TRLFS
复制标题
DOI：
10.1007/s10967-007-7082-6
复制
发表时间：
2008-03
影响因子：
1.6
通讯作者：
Maja Glorius;H. Moll;G. Geipel;G. Bernhard
中科院分区：
文献类型：
--
作者：
Maja Glorius;H. Moll;G. Geipel;G. Bernhard
用时间分辨激光诱导荧光光谱法研究了铀（VI）与水杨基异羟肟酸、苯甲异羟肟酸和苯甲酸的配合物形成过程。我们观察到在所有三个系统中的荧光强度随着配体浓度的增加而降低。所有确定的络合铀酰物种的类型MpLqHr。在铀（VI）-水杨基异羟肟酸体系中，确定了1：1的配合物，其稳定常数为logβ111= 17.34±0.06;确定了1：2的配合物，其稳定常数为logβ122= 35.0±0.11。在铀（VI）-苯并异羟肟酸体系中，稳定常数logβ110= 7.92±0.11，logβ120= 16.88±0.49。在铀（VI）-苯甲酸体系中，只有1：1的配合物存在，其稳定常数logβ110= 3.56±0.05。
The complex formation of uranium(VI) with salicylhydroxamic, benzohydroxamic, and benzoic acid was investigated by time-resolved laser-induced fluorescence spectroscopy (TRLFS). We observed in all three systems a decrease in the fluorescence intensity with increasing ligand concentration. All identified complexed uranyl species are of the type MpLqHr. In the uranium(VI)-salicylhydroxamate system a 1: 1 complex with a stability constant of logβ111= 17.34±0.06 and a 1: 2 complex with a stability constant of logβ122= 35.0±0.11 was identified. Also in the uranium(VI)-benzohydroxamate system the stability constants are determined to be logβ110= 7.92±0.11 and logβ120= 16.88±0.49. In the uranium(VI)-benzoate system only a 1: 1 complex is existent with a stability constant of logβ110= 3.56±0.05.