KFU. Card publication. Study of structural and dynamic characteristics of copper(II) amino acid complexes in solutions by combined EPR and NMR relaxation methods

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STUDY OF STRUCTURAL AND DYNAMIC CHARACTERISTICS OF COPPER(II) AMINO ACID COMPLEXES IN SOLUTIONS BY COMBINED EPR AND NMR RELAXATION METHODS

Form of presentation

Articles in international journals and collections

Year of publication

2014

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Authors, employees of KFU

Ilin Aleksandr Nikolaevich, author

Krutikov Aleksandr Aleksandrovich, author

Mamin Georgiy Vladimirovich, author

Mukhtarov Anvar Sharafulislamovich, author

Authors, postgraduates KFU

Ilin Aleksandr Nikolaevich, postgraduate kfu

Serov Nikita Yurevich, postgraduate kfu

Bibliographic description in the original language

Study of structural and dynamic characteristics of copper(II) amino acid complexes in solutions by combined EPR and NMR relaxation methods / M.S. Bukharov, V.G. Shtyrlin, A.Sh. Mukhtarov, G.V. Mamin, S. Stapf, C. Mattea, A.A. Krutikov, A.N. Ill'in and N.Yu. Serov // Phys. Chem. Chem. Phys. 2014. V. 16. P. 9411-9421.

Annotation

Structural features and dynamical behaviour of the copper(II) bis-complexes with glycine, D-alanine, D-valine, L-serine, L-aspartic acid, L-glutamic acid, L-lysine, L-proline, and sarcosine were studied by combined EPR and NMR relaxation methods. The cis and trans isomers were unambiguously assigned and characterized by EPR data. It was found that addition of a salt background has an influence on the cis?trans isomer equilibrium in favour of the formation of the cis isomer. By comparison of NMRD, DFT computations, and structural data it was shown that only one water molecule is coordinated in the axial position of these complexes. The increased exchange rates of this molecule found for Cu(L-Asp)22−, Cu(L-Glu)22−, Cu(L-LysH)22+, and Cu(L-Pro)2 were attributed to its pushing out by side chain groups of the ligands. By simulation of NMRD profiles an increase of lifetimes of the copper(II) 2nd coordination sphere water molecules was revealed in the presence of additional carboxylic, alcoho

Keywords

EPR, NMR relaxation, amino acids, copper(II) complexes

The name of the journal

PHYS CHEM CHEM PHYS

URL

http://pubs.rsc.org/en/content/articlelanding/2014/cp/c4cp00255e#!divAbstract

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=88722&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Ilin Aleksandr Nikolaevich	ru_RU
dc.contributor.author	Krutikov Aleksandr Aleksandrovich	ru_RU
dc.contributor.author	Mamin Georgiy Vladimirovich	ru_RU
dc.contributor.author	Mukhtarov Anvar Sharafulislamovich	ru_RU
dc.contributor.author	Ilin Aleksandr Nikolaevich	ru_RU
dc.contributor.author	Serov Nikita Yurevich	ru_RU
dc.date.accessioned	2014-01-01T00:00:00Z	ru_RU
dc.date.available	2014-01-01T00:00:00Z	ru_RU
dc.date.issued	2014	ru_RU
dc.identifier.citation	Study of structural and dynamic characteristics of copper(II) amino acid complexes in solutions by combined EPR and NMR relaxation methods / M.S. Bukharov, V.G. Shtyrlin, A.Sh. Mukhtarov, G.V. Mamin, S. Stapf, C. Mattea, A.A. Krutikov, A.N. Ill'in and N.Yu. Serov // Phys. Chem. Chem. Phys. 2014. V. 16. P. 9411-9421.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=88722&p_lang=2	ru_RU
dc.description.abstract	PHYS CHEM CHEM PHYS	ru_RU
dc.description.abstract	Structural features and dynamical behaviour of the copper(II) bis-complexes with glycine, D-alanine, D-valine, L-serine, L-aspartic acid, L-glutamic acid, L-lysine, L-proline, and sarcosine were studied by combined EPR and NMR relaxation methods. The cis and trans isomers were unambiguously assigned and characterized by EPR data. It was found that addition of a salt background has an influence on the cis?trans isomer equilibrium in favour of the formation of the cis isomer. By comparison of NMRD, DFT computations, and structural data it was shown that only one water molecule is coordinated in the axial position of these complexes. The increased exchange rates of this molecule found for Cu(L-Asp)22−, Cu(L-Glu)22−, Cu(L-LysH)22+, and Cu(L-Pro)2 were attributed to its pushing out by side chain groups of the ligands. By simulation of NMRD profiles an increase of lifetimes of the copper(II) 2nd coordination sphere water molecules was revealed in the presence of additional carboxylic, alcoho	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	EPR	ru_RU
dc.subject	NMR relaxation	ru_RU
dc.subject	amino acids	ru_RU
dc.subject	copper(II) complexes	ru_RU
dc.title	Study of structural and dynamic characteristics of copper(II) amino acid complexes in solutions by combined EPR and NMR relaxation methods	ru_RU
dc.type	Articles in international journals and collections	ru_RU