title: 7Li-NMR and FTIR studies of lithium, potassium, rubidium, and cesium complexes with ionophore lasalocid in solution.
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.
authors.affiliation: Department of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznań, Poland.
authors.forename: R
authors.initials: R
authors.lastname: Pankiewicz
authors.forename: G
authors.initials: G
authors.lastname: Schroeder
authors.forename: B
authors.initials: B
authors.lastname: Gierczyk
authors.forename: G
authors.initials: G
authors.lastname: Wojciechowski
authors.forename: B
authors.initials: B
authors.lastname: Brzezinski
authors.forename: F
authors.initials: F
authors.lastname: Bartl
authors.forename: G
authors.initials: G
authors.lastname: Zundel
mesh_terms: D002586:Cesium / Q000737:chemistry; D066298:In Vitro Techniques; D007476:Ionophores / Q000737:chemistry*; D007832:Lasalocid / Q000737:chemistry*; D008094:Lithium / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D011108:Polymers / Q000737:chemistry; D011188:Potassium / Q000737:chemistry; D012413:Rubidium / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D007476:Ionophores; D011108:Polymers; D002586:Cesium; D008094:Lithium; D012413:Rubidium; D011188:Potassium; D007832:Lasalocid