Fluoride Binding and Crystal-Field Analysis of Lanthanide Complexes of Tetrapicolyl-Appended Cyclen

Autor:	Jose M. Goicoechea, Stephen Faulkner, Andrew R. Jupp, Octavia A. Blackburn, Paul D. Beer, Alan M. Kenwright
Rok vydání:	2016
Předmět:	Lanthanide 010405 organic chemistry Chemistry Organic Chemistry Inorganic chemistry General Chemistry Nuclear magnetic resonance spectroscopy 010402 general chemistry 01 natural sciences Affinities Catalysis 0104 chemical sciences Crystal Magnetic anisotropy chemistry.chemical_compound Crystallography Cyclen Molecule Fluoride
Zdroj:	Chemistry - A European Journal. 22:8929-8936
ISSN:	0947-6539
DOI:	10.1002/chem.201601170
Popis:	Lanthanide complexes of tetrapicolyl cyclen displayed remarkably high affinities for fluoride (log K≈5) in water, and were shown to form 1:1 complexes. The behaviour of these systems can be rationalised by changes to the magnitude of the crystal-field parameter, B20 . However, such changes are not invariably accompanied by a change in sign of this parameter: for early lanthanides, the N8 donor set with a coordinated axial water molecule ensures that the magnetic anisotropy has the opposite sense to that observed in the analogous dehydrated lanthanide complexes.
Databáze:	OpenAIRE
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