Metal-carboxylate interactions in metal-alginate complexes studied with FTIR spectroscopy

被引：722

作者：

Papageorgiou, Sergios K. ^{[1
]}

Kouvelos, Evangelos P. ^{[1
]}

Favvas, Evangelos P. ^{[1
]}

Sapalidis, Andreas A. ^{[1
]}

Romanos, George E. ^{[1
]}

Katsaros, Fotios K. ^{[1
]}

机构：

[1] NCSR Demokritos, Inst Phys Chem, Aghia Paraskevi 15310, Greece

来源：

CARBOHYDRATE RESEARCH | 2010年 / 345卷 / 04期

关键词：

Alginate; FTIR; Metal-carboxylate; Bidentate; Unidentate; Bridged; X-RAY-DIFFRACTION; EGG-BOX MODEL; STRUCTURAL COMPONENTS; CRYSTALLINE-STRUCTURE; LAMINARIA-DIGITATA; ACID; CALCIUM; HYDROLYSIS; SORPTION; CADMIUM;

D O I：

10.1016/j.carres.2009.12.010

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

FTIR spectroscopy was used in order to obtain information about metal-carboxylate interactions in metal-alginate complexes of alginic acid and sodium alginate from the brown algae Laminaria digitata after crosslinking with Ca2+, Cu2+, Cd2+, Zn2+, Ni2+ and Pb2+. From the frequencies of the characteristic peaks for asymmetric COO stretching vibration (nu(asym)(COO-) and symmetric COO stretching vibration (nu(sym)(COO-)) a 'pseudo bridged' unidentate coordination with intermolecular hydrogen bonds is proposed for the metal-carboxylate complexes in polyguluronic regions while for the polymannuronic regions the bidentate bridging coordination was proposed. The PIB factor introduced previously as a relationship between metal sorption and frequencies of the asymmetric vibrations was found not to correlate with sorption capacity or any other physical property of the metal-alginate complexes studied. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：469 / 473

页数：5

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