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
| Autor: | Igor A. Nikovskiy, Alexander V. Polezhaev, Valentin V. Novikov, Dmitry Yu. Aleshin, Rinat R. Aysin, Elizaveta K. Melnikova, Luca M. Carrella, Eva Rentschler, Yulia V. Nelyubina |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Crystals, Vol 11, Iss 8, p 922 (2021) |
| Druh dokumentu: | article |
| ISSN: | 11080922 2073-4352 |
| DOI: | 10.3390/cryst11080922 |
| Popis: | A series of new bis(pyrazol-3-yl)pyridines (LR) 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(LR)2](ClO4)2 by variable-temperature magnetometry, NMR spectroscopy, and X-ray diffraction. The SCO-assisting tendency of the substituents 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. |
| Databáze: | Directory of Open Access Journals |
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