Cooperativity in spin crossover systems: Memory, magnetism and microporosity

被引：218
作者：
Murray, KS
Kepert, CJ
机构：
[1] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia
[2] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia
来源：
SPIN CROSSOVER IN TRANSITION METAL COMPOUNDS I | 2004年 / 233卷
关键词：
spin crossover; polynuclear; magnetism; cooperativity; microporosity;
D O I：
10.1007/b13536
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
This review deals with spin crossover effects in small polynuclear clusters, particularly dinuclear species, and in extended network molecular materials, some of which have interpenetrated network structures. Fe(II)Fe(II) species are the main focus but Co(II)Co(II) compounds are included. The sections on dinuclear compounds include short background reviews on (i) synergism of SCO and spin-spin magnetic exchange (ii) cooperativity (memory effects) in polynuclear compounds, and (iii) the design of dinuclear SCO compounds using structural and ligand field concepts. Known examples of dinuclear compounds are reviewed and our new examples are described, these being based on hydrogen-bonded water to pyrazole ligand linkages. incomplete (half) SCO transitions, due to HS-HS to HS-LS transformations, are commonly observed, with no thermal hysteresis. New and ground-breaking studies of microporous extended network Fe(II)(NCS)(2)(PY)(4)-type systems reveal reversible host-guest systems which display reversible sorption/desorption of guest molecules and SCO behaviour that varies with exchange of the guests.
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收藏
页码：195 / 228
页数：34
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