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Hydrogen bond-induced abrupt spin crossover behaviour in 1-D cobalt(ii) complexes – the key role of solvate water molecules by Hikaru Zenno; Fumiya Kobayashi; Masaaki Nakamura; Yoshihiro Sekine; Leonard F. Lindoy; Shinya Hayami is a Chemistry article available to read on EtoBox.
What is Hydrogen bond-induced abrupt spin crossover behaviour in 1-D cobalt(ii) complexes – the key role of solvate water molecules about?
The magnetic properties and structural aspects of the 1-D cobalt(ii) complexes, [Co(pyterpy)Cl2]·2H2O (1·2H2O; pyterpy = 4'-(4'''-pyridyl)-2,2':6',2''-terpyridine) and [Co(pyethyterpy)Cl2]·2H2O (2·2H2O; pyethyterpy = 4'-((4'''-pyridyl)ethynyl)-2,2':6',2''-terpyridine) are reported. In each complex the central cobalt(ii) ion displays an octahedral coordination environment composed of three nitrogen donors from the terpyridine moiety, a nitrogen donor from a pyridyl group and two chloride ligands which occupy the axial sites. 1·2H2O exhibits abrupt spin-crossover (SCO) behaviour (T1/2↓ = 218 K; T1/2↑ = 227 K) along with a thermal hysteresis loop, while 2·2H2O and the dehydrated species 1 and 2 exhibit high-spin (HS) states at 2-300 K as well as field-induced single-molecule magnet (SMM) behaviour attributed to the presence of magnetic anisotropic HS cobalt(ii) species (S = 3/2). 1·2H2O exhibited reversible desorption/resorption of its two water molecules, revealing reversible switching between SCO and SMM behaviour triggered by the dehydration/rehydration processes. Single crystal X-ray structural analyses revealed that 1·2H2O crystalizes in the orthorhombic space group Pcca while 2
Who reads Hydrogen bond-induced abrupt spin crossover behaviour in 1-D cobalt(ii) complexes – the key role of solvate water molecules?
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- Author
- Hikaru Zenno; Fumiya Kobayashi; Masaaki Nakamura; Yoshihiro Sekine; Leonard F. Lindoy; Shinya Hayami
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2021
- Language
- EN
- Field
- Chemistry (Physical Sciences)