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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
| Content Provider | MDPI |
|---|---|
| Author | Nikovskiy, Igor Polezhaev, Alexander Novikov, Valentin Aleshin, Dmitry Aysin, Rinat Melnikova, Elizaveta Carrella, Luca Rentschler, Eva Nelyubina, Yulia |
| Copyright Year | 2021 |
| Description | 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}$)_{2}](ClO_{4})_{2}$ 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. |
| Starting Page | 922 |
| e-ISSN | 20734352 |
| DOI | 10.3390/cryst11080922 |
| Journal | Crystals |
| Issue Number | 8 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-08-08 |
| Access Restriction | Open |
| Subject Keyword | Crystals Distal Substituent Iron(ii) Complexes Molecular Design Paramagnetic Nmr Spectroscopy Spin-crossover X-ray Diffraction |
| Content Type | Text |
| Resource Type | Article |
