The time differential perturbed angular correlation study of binding of hafnium to humic acid and its model compound

被引：3
作者：
Rawat, N. [1 ]
Kumar, S. [1 ]
Tomar, B. [1 ]
机构：
[1] Bhabha Atom Res Ctr, Div Radiochem, Mumbai 400085, Maharashtra, India
来源：
POLYHEDRON | 2009年 / 28卷 / 08期
关键词：
Time differential perturbed angular correlation; Hf-181; Mandelic acid; Humic acid; Electric field gradient; NEUTRAL PH CONDITIONS; FLUORESCENCE SPECTROSCOPY; COMPLEXATION; SUBSTANCES; KINETICS; AM(III); CM(III); TRLFS; EXAFS; TDPAC;
D O I：
10.1016/j.poly.2009.02.036
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Time differential perturbed angular correlation (TDPAC) spectroscopy has been used to study the binding of hafnium to mandelic acid, which is a model compound of humic acid. The Fourier transform of TDPAC spectrum of Hf-mandelate complex showed two omega values, namely, omega(Q1) = 77 (+/-0.4) Mrad/s and omega(Q2) = 111 (+/-3.1) Mrad/s. The asymmetry parameters for the two sites were found to be 0.7 and 0.3, respectively. The electric field gradient (EFG) around the metal ion was theoretically calculated using the computer code GAMESS. The calculated EFG value was found to be in reasonable agreement with that deduced from experiment. Contrary to Hf-mandelate, the TDPAC spectrum of Hf-humate system did not show characteristic features of discrete binding sites. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1399 / 1402
页数：4
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