Spin-crossover in iron(Ii) complexes of n,n′-disubstituted 2,6-bis(pyrazol-3-yl)pyridines: An effect of a distal substituent in the 2,6-dibromophenyl group

Nikovskiy IA, Polezhaev A, Novikov VV, Aleshin DY, Aysin RR, Melnikova EK, Carrella LM, Rentschler E, Nelyubina Y (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Crystals MDPI

Book Volume: 11

Article Number: 922

Journal Issue: 8

DOI: 10.3390/cryst11080922

Abstract

A series of new bis(pyrazol-3-yl)pyridines (L^R ) N,N^′-disubstituted by 4-functionalized 2,6-dibromophenyl groups have been synthesized to study the effect of a distal substituent on the spin-crossover (SCO) behaviour of the iron(II) complexes [Fe(L^R )2 ](ClO4 )2 by variable-temperature magnetometry, NMR spectroscopy, and X-ray diffraction. The SCO-assisting tendency of the sub-stituents with different electronic and steric properties (i.e., the bromine atom and the methyl group) in the para-position of the 2,6-dibromophenyl group is discussed. Together with earlier reported SCO-active iron(II) complexes with N,N^′-disubstituted bis(pyrazol-3-yl)pyridines, these new complexes open the way for this family of SCO compounds to emerge as an effective ‘tool’ in revealing structure–function relations, a prerequisite for successful molecular design of switchable materials for future breakthrough applications in sensing, switching, and memory devices.

Involved external institutions

Russian Academy of Sciences / Росси́йская акаде́мия нау́к (RAS)

Russian Federation (RU) Johannes Gutenberg-Universität Mainz (JGU)

Germany (DE)

How to cite

APA:

Nikovskiy, I.A., Polezhaev, A., Novikov, V.V., Aleshin, D.Y., Aysin, R.R., Melnikova, E.K.,... Nelyubina, Y. (2021). Spin-crossover in iron(Ii) complexes of n,n′-disubstituted 2,6-bis(pyrazol-3-yl)pyridines: An effect of a distal substituent in the 2,6-dibromophenyl group. Crystals, 11(8). https://doi.org/10.3390/cryst11080922

MLA:

Nikovskiy, Igor A., et al. "Spin-crossover in iron(Ii) complexes of n,n′-disubstituted 2,6-bis(pyrazol-3-yl)pyridines: An effect of a distal substituent in the 2,6-dibromophenyl group." Crystals 11.8 (2021).

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