23Na NMR and FT-IR studies of sodium complexes with the ionophore lasalocid in solution

被引：11

作者：

Schroeder, G

Gierczyk, B

Brzezinski, B

Rózalski, B

Bartl, F

Zundel, G

Sosnicki, J

Grech, E

机构：

[1] Univ Munich, Inst Phys Chem, D-80333 Munich, Germany

[2] Adam Mickiewicz Univ, Fac Chem, PL-60780 Poznan, Poland

[3] Humboldt Univ, Klinikum Charite, Inst Med Phys & Biophys, D-10098 Berlin, Germany

[4] Tech Univ Szczecin, Inst Fundamental Chem, PL-71065 Szczecin, Poland

来源：

JOURNAL OF MOLECULAR STRUCTURE | 2000年 / 516卷 / 01期

关键词：

lasalocid; Na+-lasalocid complexes; Na-23; NMR; FT-IR; cation fluctuation; hydrogen bonds; cation polarizability;

D O I：

10.1016/S0022-2860(99)00139-8

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：

Lasalocid forms 1:1 or 2:2 complexes with sodium ions. The process of complexation was studied in different solvents at various temperatures by Na-23 NMR. The formation constants and be values were determined. The nature of the complex between lasalocid and Na+ ions was also studied by FT-LR spectroscopy. In chloroform, a 2:2 complex of lasalocid and Na+ ions is formed. A continuous absorption is observed in the far FT-IR spectrum of this complex. It indicates the large Na+ polarizability due to fast fluctuations of the Na+ ions in multiminima potentials, in the dimeric structure, (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：91 / 98

页数：8

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[1] OPTICAL-ACTIVITY AND CONFORMATION OF CATION CARRIER X537A [J].