کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1307055 975119 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Complexation study of europium(III) and curium(III) with urea in aqueous solution investigated by time-resolved laser-induced fluorescence spectroscopy
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Complexation study of europium(III) and curium(III) with urea in aqueous solution investigated by time-resolved laser-induced fluorescence spectroscopy
چکیده انگلیسی

The complex formation of europium(III) and curium(III) with urea in aqueous solution has been studied at I = 0.1 M (NaClO4), room temperature and trace metal concentrations in the pH-range of 1–8 at various ligand concentrations using time-resolved laser-fluorescence spectroscopy. While for curium(III) the luminescence maximum is red shifted upon complexation, in case of europium(III) emission wavelengths remain unaltered but a significant change in peak splitting occurs. Both heavy metals form weak complexes of the formulae ML3+ and MLOH2+ with urea. Stability constants were determined to be log β110 = −0.12 ± 0.05 and log β11-1 = −6.86 ± 0.15 for europium(III) and log β110 = −0.28 ± 0.12 and log β11-1 = −7.01 ± 0.15 for curium(III).

The complex formation of europium(III) and curium(III) with urea has been studied using TRLFS. Stability constants were determined to be log β110 = −0.12 ± 0.05 and log β11-1 = −6.86 ± 0.15 for europium(III) and log β110 = −0.28 ± 0.12 and log β11-1 = −7.01 ± 0.15 for curium(III).Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Inorganica Chimica Acta - Volume 362, Issue 4, 2 March 2009, Pages 1215–1222
نویسندگان
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