1H NMR STUDY OF MIXED-LIGAND LANTHANIDE COMPLEXES. STOICHIOMETRY AND TEMPERATURE SENSITIVITY OF PARAMAGNETIC CHEMICAL SHIFTS OF PRASEODYMIUM β-DIKETONATES AND THEIR COMPOUNDS WITH 18-CROWN-6

Autor:	Sergey V. Tkachev, P. A. Stabnikov, Sergey P. Babailov, Alexander I. Kruppa
Rok vydání:	2021
Předmět:	Lanthanide chemistry.chemical_classification Lanthanide probes Praseodymium Ligand Chemical shift 18-Crown-6 chemistry.chemical_element Coordination complex Inorganic Chemistry chemistry.chemical_compound Crystallography chemistry Materials Chemistry Proton NMR Physical and Theoretical Chemistry
Zdroj:	Journal of Structural Chemistry. 62:1184-1190
ISSN:	1573-8779 0022-4766
DOI:	10.1134/s0022476621080035
Popis:	Complexes [(Pr(DPM)3)2], [Pr(DPM)3(18-crown-6)], [(Pr(DPM)3)2(18-crown-6)], [Pr(DPM)(PTA)(18-crown-6)]+ and the temperature sensitivity of paramagnetic lanthanidine-induced shifts of these complexes in CDCl3 solution are characterized by 1H NMR. The NMR methods are used to estimate the possibility of forming inclusive complexes in CDCl3 solution upon the interaction of lanthanide tris-β-diketonates with 18-crown-6 in the case of a more branched ligand than PTA (e.g., DPM). Upon the interaction of [(Pr(DPM)3)2] and 18-crown-6, the [Pr(DPM)3(18-crown-6)] forms prevail in solution. The obtained results indicate that the studied coordination compounds can be considered as 1H NMR paramagnetic lanthanide probes for local temperature control in organic solutions using the analysis of paramagnetic lanthanidine-induced shifts.
Databáze:	OpenAIRE
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