Unprecedented bistability domain and interplay between spin crossover and polymorphism in a mononuclear iron(II) complex

Unprecedented bistability domain and interplay between spin crossover and polymorphism in a mononuclear iron(II) complex Full article

Journal

Dalton Transactions
ISSN: 1477-9226 , E-ISSN: 1477-9234

Output data

Year: 2014, Volume: 43, Number: 10, Pages: 3906-3910 Pages count : DOI: 10.1039/c3dt53440e

Authors

Bushuev Mark B. ^1,2 , Daletsky Vasiliy A. ¹ , Pishchur Denis P. ¹ , Gatilov Yuri V. ³ , Korolkov Ilya V. ¹ , Nikolaenkova Elena B. ³ , Krivopalov Viktor P. ³

Affiliations

1	(Данные Web of science) Russian Acad Sci, Siberian Branch, Nikolaev Inst Inorgan Chem, Novosibirsk 630090, Russia
2	(Данные Web of science) Novosibirsk State Univ, Novosibirsk 630090, Russia
3	(Данные Web of science) Russian Acad Sci, Siberian Branch, NN Vorozhtsov Novosibirsk Inst Organ Chem, Novosibirsk 630090, Russia

A mononuclear complex, [FeL2](BF4)(2)center dot xH(2)O (1LS center dot xH(2)O), where L is 4-(3,5-dimethyl-1H-pyrazol-1-yl)-2( pyridin-2-yl)-6-methylpyrimidine, can be converted into several phases showing different spin crossover regimes. In the first heating 1(LS)center dot xH(2)O loses water molecules and converts into a mixture of two high spin phases, 1(A/HS) and 1(C/HS). Further cycling produces the low spin phase 1(A/LS). The transition 1(A/LS). 1(A/HS) is accompanied by a 130 K wide hysteresis loop (Tc. = 490 K, Tc. = 360 K). Annealing the complex 1(LS)center dot xH(2)O at 500 K yields a high spin phase 1C/HS. The phase 1(C/HS) undergoes spin conversion to the corresponding low spin phase 1(C/LS) on cooling, T1/2 approximate to 320 K. Dehydration of 1LS.xH(2)O at 370 or 400 K yields a certain low spin phase, 1(X/LS), which irreversibly transforms into a high spin phase 1(B/HS), which, in turn, reversibly transforms to the low spin phase 1(B/LS) on cooling, T1/2 approximate to 320

Bushuev M.B. , Daletsky V.A. , Pishchur D.P. , Gatilov Y.V. , Korolkov I.V. , Nikolaenkova E.B. , Krivopalov V.P.
Unprecedented bistability domain and interplay between spin crossover and polymorphism in a mononuclear iron(II) complex
Dalton Transactions. 2014. V.43. N10. P.3906-3910. DOI: 10.1039/c3dt53440e WOS Scopus РИНЦ

Web of science	WOS:000331230900011
Scopus	2-s2.0-84893976228
Elibrary	21865357
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