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

被引：12
|
作者：
Archer, Rosanna J. [1 ,2 ]
Scott, Hayley S. [1 ,2 ]
Polson, Matthew I. J. [1 ]
Williamson, Bryce E. [1 ]
Mathoniere, Corine [3 ,4 ]
Rouzieres, Mathieu [5 ,6 ]
Clerac, Rodolphe [5 ,6 ]
Kruger, Paul E. [1 ,2 ]
机构：
[1] Univ Canterbury, Sch Phys & Chem Sci, Private Bag 4800, Christchurch 8140, New Zealand
[2] Univ Canterbury, Sch Phys & Chem Sci, MacDiarmid Inst Adv Mat & Nanotechnol, Private Bag 4800, Christchurch 8140, New Zealand
[3] CNRS, ICMCB, UMR 5026, F-33600 Pessac, France
[4] Univ Bordeaux, ICMCB, UMR 5026, F-33600 Pessac, France
[5] CNRS, CRPP, UMR 5031, F-33600 Pessac, France
[6] Univ Bordeaux, CRPP, UMR 5031, F-33600 Pessac, France
来源：
DALTON TRANSACTIONS | 2018年 / 47卷 / 24期
关键词：
IRON(II) COMPLEXES; STATE; LIGAND; TEMPERATURE; MONONUCLEAR; PRESSURE; PHOTOMAGNETISM; RELAXATION; COBALT(II); SENSORS;
D O I：
10.1039/c8dt01567h
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
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) magnetic-susceptibility measurements reveal the T-1/2 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.
引用
收藏
页码：7965 / 7974
页数：10
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