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7Li-NMR and FTIR Studies of Lithium, Potassium, Rubidium, and Cesium Complexes With Ionophore Lasalocid in Solution

7Li-NMR and FTIR Studies of Lithium, Potassium, Rubidium, and Cesium Complexes With Ionophore Lasalocid in Solution

R Pankiewicz, G Schroeder, B Gierczyk, G Wojciechowski, B Brzezinski, F Bartl, G Zundel

Biopolymers. 2001;62(3):173-82.

PMID: 11343288

Abstract:

Lasalocid metal salts were combined with 1 : 1 lithium and 2:2 potassium, rubidium, and cesium to form complexes. The nature of the lasolocid salt complexes was studied in a solid and chloroform by FTIR spectroscopy in the middle and far IR regions. The process of the complexation of lithium was also studied by (7)Li-NMR. In chloroform a 1 : 1 complex of lasalocid and Li(+) ions was formed. Continuous absorption was observed in the far FTIR spectrum of this complex. It indicated large Li(+) polarizability, which was due to fast fluctuations of the Li(+) ions in the multiminima potentials, in the monomeric structure. In the lasalocid salt with the other monovalent cations (K(+), Rb(+), Cs(+)) 2:2 complexes were formed in which the cations showed cation polarizability, which strongly depended on the mass and the radius of the cations.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP97600458	Cesium ionophore I		97600-45-8	Price

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