Comprehensive Chemical Characterization of Complexes Involving Lead-Amino Acid Interactions

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• 作者：Cheryl D. L. Saunders ; Lauren E. Longobardi ; Neil Burford ; Michael D. Lumsden ; Ulrike Werner-Zwanziger ; Banghao Chen ; Robert McDonald
• 刊名：Inorganic Chemistry
• 出版年：2011
• 出版时间：April 4, 2011
• 年：2011
• 卷：50
• 期：7
• 页码：2799-2810
• 全文大小：1150K
• 年卷期：v.50,no.7(April 4, 2011)
• ISSN：1520-510X

文摘

Complexes of lead with l-phenylalanine, l-isoleucine, l-valine, or l-arginine have been isolated from reaction mixtures containing lead nitrate and the respective amino acid in acidic aqueous solution. The compounds have been comprehensively characterized using X-ray crystallography, solid state NMR spectroscopy and solution state NMR spectroscopy, IR and Raman spectroscopies, and electrospray ionization mass-spectrometry. The solid state structures of lead-phenylalanine, lead-valine, and lead-valine-isoleucine complexes show a lead center coordinated by two amino acid ligands, while the lead-arginine complex is a cluster involving two lead centers and three arginine molecules. The structural, spectroscopic, and spectrometric characterization of the complexes provides a basis to establish a fundamental understanding of heavy metal-amino acid interactions.