Electrochemical studies of iron(II) complexes with 4-amino-1,2,4-triazole possessing spin crossover

Electrochemical studies of iron(II) complexes with 4-amino-1,2,4-triazole possessing spin crossover Full article

Journal

Zeitschrift für anorganische und allgemeine Chemie
ISSN: 0044-2313 , E-ISSN: 1521-3749

Output data

Year: 2021, Volume: 647, Number: 16-17, Pages: 1620-1624 Pages count : 5 DOI: 10.1002/zaac.202100102

Authors

Kokovkin V.V. ^1,2 , Kal’nyi D.B. ^1,2 , Korotaev E.V. ¹ , Shakirova O.G. ^1,3 , Lavrenova L.G. ^1,2

Affiliations

1	Nikolaev Institute of Inorganic Chemistry SB RAS, 3, Lavrentiev Ave., Novosibirsk, 630090, Russia
2	Analytical Chemistry Department, Faculty of Natural Sciences, Novosibirsk National Research State University, 2, Pirogov Str., Novosibirsk, 630090, Russia
3	Komsomolsky-na-Amure State Technical University, 27, Lenin Ave., Komsomolsk-on-Amur, 681013, Russia

The electrochemical properties of a number of coordination compounds of iron(II) with 4-amino-1,2,4-triazole (NH2trz), which have a sharp thermally induced spin crossover with hysteresis on the temperature curves of the effective magnetic moment dependence, were studied using method cyclic voltammetry (CV) at 298 K. The complexes were mixed with carbon powder and silicon oil and included in the paste electrode. The measurements were made in solutions of 0.10 M KNO3. It was found that the area 0.5-0.6 V and 0.3-0.4 V contains the anode and cathode current peaks of freshly prepared paste electrodes. In all cases, the redox process in the paste is quasi-reversible. At the same molar concentration of complexes in the paste (0.1 mol kg–1), a number of current peaks depends on the nature of the anion. The peak current value correlates with the calculated fraction of the high spin form in the solid phase of the complex and the temperature of the direct spin crossover (when heated, Tc↑). The magnetic properties of Fe(NH2trz)3(NO3)2 complex, its mixture with carbon powder and the paste were measured by Faraday method in a temperature range 80–370 K. The effective magnetic moment was depended on changes in variations in the environment of the molecules of the complex in the studied samples.

Kokovkin V.V. , Kal’nyi D.B. , Korotaev E.V. , Shakirova O.G. , Lavrenova L.G.
Electrochemical studies of iron(II) complexes with 4-amino-1,2,4-triazole possessing spin crossover
Zeitschrift für anorganische und allgemeine Chemie. 2021. V.647. N16-17. P.1620-1624. DOI: 10.1002/zaac.202100102 WOS Scopus РИНЦ OpenAlex

Web of science:	WOS:000672953700001
Scopus:	2-s2.0-85110331644
Elibrary:	46937589
OpenAlex:	W3174807603

DB	Citing
OpenAlex	1
Scopus	1
Elibrary	2