ARCHER, Rosanna; SCOTT, Hayley; POLSON, Matthew; WILLIAMSON, Bryce; MATHONIÈRE, Corine; ROUZIÈRES, Mathieu; CLÉRAC, Rodolphe; KRUGER, Paul

doi:10.1039/c8dt01567h

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ARCHER, Rosanna
School of Physical Chemical Sciences [Christchurch]
MacDiarmid Institute for Advanced Materials and Nanotechnology

SCOTT, Hayley
School of Physical Chemical Sciences [Christchurch]
MacDiarmid Institute for Advanced Materials and Nanotechnology

POLSON, Matthew
School of Physical Chemical Sciences [Christchurch]

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Dalton Transactions. 2018, vol. 47, n° 24, p. 7965 - 7974

Royal Society of Chemistry

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Dinuclear triple-helicate complexes of the formula [Fe2L3](BF4)4·solv (solv = CH3CN, CHCl3, H2O) have been synthesised and structurally characterised. The bis-bidentate ligands, L, present either strong-field 2-pyridylimine (1) or weaker-field 2-imidazolylimine (2) and 4-imidazolylimine (3) coordination spheres about Fe(II) centres in an octahedral geometry. Whereas 1 is pervasively diamagnetic, spin crossover (SCO) behaviour is observed in 2 and 3 and has been studied using variable-temperature structural, UV-visible spectroscopic, magnetic and photo-magnetic techniques. Variable-temperature (1.8–400 K) magneticsusceptibility measurements reveal the T1/2 values of 2 and 3 to be strongly dependent upon the solvent and degree of solvation. Photomagnetic studies at 10 K under white-light irradiation revealed an inefficient photo-induced SCO in 2, but full switching in 3.< Réduire

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Varied spin crossover behaviour in a family of dinuclear Fe( ii ) triple helicate complexes

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