| Spectral studies on the interaction of yttrium ion with the ligands of phenolic groups: N,N'-Ethylenebis[2-(o-hydroxyphenolic)glycine] and N,N'-di(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid. | |
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MedLine Citation:
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PMID: 17267267 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The interactions of yttrium with N,N'-ethylenebis[2-(o-hydroxyphenolic)glycine] (EHPG) and N,N'-di(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid (HBED) are investigated by using UV difference and fluorescence spectra methods in 0.1M N-2-hydroxyethylpiperazine-N-2-ethanesulfonic acid (Hepes) at pH 7.4. Yttrium binding produces two UV difference peaks near 240 and 294 nm, respectively, that both are the characteristic of phenolic groups binding to yttrium. The molar extinction coefficient of Y-EHPG and Y-HBED are (15.7 +/- 0.40) x 10(3), (15.8 +/- 0.80) x 10(3)cm(-1)M(-1) at 240 nm, respectively. Using EDTA as a competitor the obtained conditional equilibrium constants of the complexes are logK(Y-EHPG) = 15.07 +/- 0.32 and logK(Y-HBED) = 15.18 +/- 0.26, respectively. However, the effects of yttrium binding on the fluorescence intensity of EHPG and HBED are quite different, the former showing a decrease but the latter an increase. |
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Authors:
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Lian Duan; Ya-Qin Zhao; Bin-Sheng Yang |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2006-11-21 |
Journal Detail:
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Title: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Volume: 68 ISSN: 1386-1425 ISO Abbreviation: Spectrochim Acta A Mol Biomol Spectrosc Publication Date: 2007 Sep |
Date Detail:
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Created Date: 2007-08-13 Completed Date: 2007-12-06 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9602533 Medline TA: Spectrochim Acta A Mol Biomol Spectrosc Country: England |
Other Details:
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Languages: eng Pagination: 165-8 Citation Subset: IM |
Affiliation:
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Institute of Molecular Science, Chemical Biology and Molecular Engineering Laboratory of Education Ministry, Shanxi University, Taiyuan, Shanxi 030006, PR China. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acetic Acids
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analysis,
chemistry* Binding, Competitive Edetic Acid / chemistry Ethylenediamines / analysis, chemistry* Glycine / analogs & derivatives*, analysis, chemistry* HEPES / chemistry Ions* Kinetics Ligands Neodymium / chemistry Phenol / chemistry* Spectrophotometry / methods Spectrophotometry, Ultraviolet / methods Yttrium / chemistry* |
| Chemical | |
Reg. No./Substance:
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0/Acetic Acids; 0/Ethylenediamines; 0/Ions; 0/Ligands; 0/N,N'-di(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid; 0/N,N'-ethylenebis(2-(o-hydroxyphenolic)glycine); 107-15-3/ethylenediamine; 108-95-2/Phenol; 56-40-6/Glycine; 60-00-4/Edetic Acid; 7365-45-9/HEPES; 7440-00-8/Neodymium; 7440-65-5/Yttrium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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