Synthesis, structural features, magnetic properties and thermal decomposition of a new series of polymeric Ln(III)–Cr(III) cyclopropane-1,1-dicarboxylates

Bazhina, E.S.; Shmelev, M.A.; Voronina, J.K.; Korotkova, N.A.; Babeshkin, K.A.; Matiukhina, A.K.; Belova, E.V.; Gogoleva, N.V.; Kottsov, S.Y.; Efimov, N.N.; Kiskin, M.A.; Eremenko, I.L.

Авторы: Bazhina Evgeniya S., Shmelev Maxim A., Voronina Julia K., Korotkova Natalia A., Babeshkin Konstantin A., Matiukhina Anna K., Belova Ekaterina V., Gogoleva Natalia V., Kottsov Sergey Yu, Efimov Nikolay N., Kiskin Mikhail A., Eremenko Igor L.
Журнал: New Journal of Chemistry
Том: 47
Номер: 41
Год издания: 2023
Издательство: Royal Society of Chemistry
Местоположение издательства: United Kingdom
Первая страница: 19251
Последняя страница: 19264
DOI: 10.1039/d3nj03027j
Аннотация: The reactions of chromium(III) nitrate with M2(cpdc) (cpdc2 – dianion of cyclopropane-1,1-dicarboxylicacid, M = K, Na) and rare-earth metal nitrates taken in a molar ratio of 1 : 3 : 1 yielded heterometalliccoordination polymers {[Ln2Cr2(cpdc)6(H2O)9]8.5H2O}n (1Ln, Ln = Eu, Gd, Tb), crystallizing in tetragonalspace group P43212 (P41212). A single crystal X-ray diffraction (XRD) study showed that the crystalstructures of these compounds are formed by tris-chelate fragments {Cr(cpdc)3} linked into {Ln–Cr}layers and further into a 3D framework structure due to the bridging coordination of carboxylate groupsto Ln atoms. When passing to Ln = Dy, Ho, Y, Er, Yb, the crystals of compounds 2Ln form, where thestructure of {Ln–Cr} layers is retained, but the disorder of the interlayer Ln atoms, a decrease in thesize of a crystal cell, and a change in the space group to I4 are observed. The use of K2(cpdc) in thesyntheses of 1Ln and 2Ln is found to lead to the isolation of a side product, namely, mononuclearcomplex [Cr(cpdc)(Hcpdc)(H2O)2]2H2O (3), with the reactions with Na2(cpdc) enabling obtaining onlythe crystals of heterometallic LnIII–CrIII compounds. Alternating current magnetic susceptibility measurements for the series 1Ln and 2Ln revealed the presence of slow relaxation of magnetization only for 1Euand 2Y, which is due to the magnetic anisotropy of chromium ions in the presence of magnetic fieldand their magnetic isolation in a crystal lattice. For 1Eu, 1Gd, 1Tb, 2Dy, and 2Ho, thermal decompositionin an Ar atmosphere was studied. The end product of solid-state thermolysis of 2Dy in air at 1000 1C isshown to be submicron DyCrO3 particles (300–400 nm).
Добавил в систему: Белова Екатерина Васильевна

	ИСТИНА	Войти в систему Регистрация
	ИСТИНА ИНХС РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИСТИНА ИНХС РАН

Synthesis, structural features, magnetic properties and thermal decomposition of a new series of polymeric Ln(III)–Cr(III) cyclopropane-1,1-dicarboxylatesстатья

Прикрепленные файлы