Activation energies of intermolecular dynamics in ethylenediaminetetraacetate complexes with lanthanides: An effect of the “gadolinium break”

Activation energies of intermolecular dynamics in ethylenediaminetetraacetate complexes with lanthanides: An effect of the “gadolinium break” Научная публикация

Журнал

Inorganica Chimica Acta
ISSN: 1873-3255 , E-ISSN: 0020-1693

Вых. Данные

Год: 2016, Том: 439, Страницы: 117-122 Страниц : 6 DOI: 10.1016/j.ica.2015.10.009

Авторы

Babailov Sergey P. ^1,2 , Chuikov Igor P. ³ , Kruppa Alexander I. ⁴

Организации

1	A.V. Nikolaev Institute of Inorganic Chemistry, The Siberian Branch of the Russian Academy of Sciences, Av. Lavrentyev 3, Novosibirsk 630090, Russian Federation
2	National Research Tomsk Polytechnic University, Lenin Avenue 30, Tomsk 634050, Russian Federation
3	N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Lavrentiev Avenue 9, 630090 Novosibirsk, Russian Federation
4	Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, Insitutskaya 3, 630090 Novosibirsk, Russian Federation

Earlier the monotonic increase of the free energy of chemical exchange processes along the series of lanthanide [Ln(H2O)(n)(EDTA(4))] complexes was found [Babailov S.P., Magnet. Reson. Chem., 2012, 50, 12, 793] for the yttrium subgroup (Tb3+, Ho3+, Tm3+, Yb3+ and Lu3+). In the present paper H-1 NMR measurements are reported for the aqueous solutions of [Ln(H2O)(n)(EDTA(4))] complexes of the cerium subgroup {La3+ (I), Pr3+ (II) and Eu3+ (III); n = 1, 2 and 3}. It is determined that the activation free energies (Delta G(298)(double dagger)) of the intermolecular EDTA(4) ions exchange at [Ln(H2O)(n)(EDTA(4))] complexes are 65 +/- 3, 65 +/- 3 and 64 +/- 3 kJ/mol for I, II and III respectively (at pD = 2.5). Comparison Delta G(298)(double dagger) values for the light and the heavy lanthanides showed a "gadolinium break" of the dependence of the Delta G(298)(double dagger) on the lanthanide cation numbers. The obtained results indicate that coordination compounds II and III may be considered as thermometric NMR sensor and lanthanide paramagnetic probes for in situ temperature control in solution. (C) 2015 Elsevier B.V. All rights reserved.

Babailov S.P. , Chuikov I.P. , Kruppa A.I.
Activation energies of intermolecular dynamics in ethylenediaminetetraacetate complexes with lanthanides: An effect of the “gadolinium break”
Inorganica Chimica Acta. 2016. V.439. P.117-122. DOI: 10.1016/j.ica.2015.10.009 WOS Scopus РИНЦ OpenAlex

Web of science:	WOS:000365044200018
Scopus:	2-s2.0-84945315175
РИНЦ:	24934646
OpenAlex:	W2184570964

БД	Цитирований
Scopus	13
OpenAlex	13
РИНЦ	14