IR and ESR study of copper(II) complexes with 15N-labelled lysine and ornithine

被引：8

作者：

Cozar, O. ^{[1
]}

Bratu, I. ^{[2
]}

Szabo, L. ^{[1
]}

Cozar, I. B. ^{[1
]}

Chis, V. ^{[1
]}

David, L. ^{[1
]}

机构：

[1] Univ Babes Bolyai, Cluj Napoca 400084, Romania

[2] Natl Inst Res & Dev Isotop & Mol Technol, RO-400293 Cluj Napoca, Romania

来源：

JOURNAL OF MOLECULAR STRUCTURE | 2011年 / 993卷 / 1-3期

关键词：

IR; ESR; N-15]-lysine; N-15]-ornithine; Cu(II)-complexes; AMINO-ACID CRYSTALS; STRUCTURAL-CHARACTERIZATION; PARAMAGNETIC RESONANCE; VIBRATIONAL-SPECTRA; NITROGEN-METABOLISM; CU(II) COMPLEXES; ALPHA-GLYCINE; LIGAND; EPR; DIMETHYLALANINE;

D O I：

10.1016/j.molstruc.2011.02.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

[N-15]-labelled lysine and ornithine amino acids together with their copper(II) complexes are investigated by IR and ESR spectroscopies. The small isotopic shifts in the vibrations frequencies of the bonds involving the N atoms were evidenced by comparing IR spectra of [N-15]-labelled and [N-14]-forms of these amino acids. Different monomeric species and their local symmetries were established from ESR spectra of Cu(II)-[N-15]-lysine (and ornithine) complexes adsorbed on NaY and HY zeolites. The in-plane sigma bond has an ionic character (alpha(2) congruent to 0.80) while the in-plane pi bond is more covalent (beta(2) congruent to 0.73) than that of the sigma type for all these species. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：397 / 403

页数：7

共 57 条

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