Electroswitching of the single-molecule magnet behaviour in an octahedral spin crossover cobalt() complex with a redox-active pyridinediimine ligand

Thermal-assisted spin crossover and field-induced slow magnetic relaxation coexist in the solid state for the mononuclear cobalt( ii ) complex with the non-innocent 2,6-bis( N -4-methoxyphenylformimidoyl)pyridine ligand. One-electron oxidation of the paramagnetic low-spin Co II ion ( S Co = 1/2) to...

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Published inChemical communications (Cambridge, England) Vol. 56; no. 81; pp. 12242 - 12245
Main Authors Rabelo, Renato, Toma, Luminita, Moliner, Nicolás, Julve, Miguel, Lloret, Francesc, Pasán, Jorge, Ruiz-Pérez, Catalina, Ruiz-García, Rafael, Cano, Joan
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 18.10.2020
Subjects
Acetonitrile
Cobalt compounds
Coordination compounds
Crossovers
Crystallography
Diamagnetism
Electron spin
Ligands
Magnetic induction
Magnetic relaxation
Oxidation
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Summary:Thermal-assisted spin crossover and field-induced slow magnetic relaxation coexist in the solid state for the mononuclear cobalt( ii ) complex with the non-innocent 2,6-bis( N -4-methoxyphenylformimidoyl)pyridine ligand. One-electron oxidation of the paramagnetic low-spin Co II ion ( S Co = 1/2) to the diamagnetic low-spin Co III ion ( S Co = 0) leads to the electroswitching of the slow magnetic relaxation in acetonitrile solution. A unique example of electroswitchable spin crossover molecular nanomagnet which proceeds through one-electron oxidation of the slow-relaxing paramagnetic low-spin Co II ion ( S Co = 1/2, ON) to the diamagnetic low-spin Co III ion ( S Co = 0, OFF).
Bibliography:Electronic supplementary information (ESI) available: Experimental details on the synthesis of the ligand and complexes and their physicochemical characterisation (Fig. S1-S8, Scheme S1, and Tables S1-S3). CCDC
For ESI and crystallographic data in CIF or other electronic format see DOI
To the memory of Prof. Catalina Ruiz-Pérez, outstanding researcher and excellent teacher, best friend and colleague who passed away in August 2019.
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1989325
10.1039/d0cc03357j
1989324
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ISSN:1359-7345
1364-548X
DOI:10.1039/d0cc03357j