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Modulation of the Interlayer Structures and Magnetic Behavior of 2D Spin‐Crossover Coordination Polymers [Fe II (L) 2 Pt II (CN) 4 ]
Author(s) -
Ohtani Ryo,
Arai Masashi,
Ohba Hisayoshi,
Hori Akihiro,
Takata Masaki,
Kitagawa Susumu,
Ohba Masaaki
Publication year - 2013
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201201204
Subject(s) - spin crossover , chemistry , crystallography , ligand (biochemistry) , coordination polymer , polymer , transition metal , spin transition , pyridine , spin (aerodynamics) , coordination complex , coordination number , stereochemistry , crystal structure , ion , metal , physics , organic chemistry , biochemistry , receptor , thermodynamics , catalysis
Two 2D Hofmann‐type spin‐crossover coordination polymers, [Fe(stpy) 2 Pt(CN) 4 ] · 0.5MeOH (stpy = 4‐styrylpyridine; 1 ) and [Fe(pep) 2 Pt(CN) 4 ] {pep = 4‐(2‐phenylethyl)pyridine; 2 }, have been prepared by using long co‐ligands with different flexibilities. These compounds form 3D interdigitate structures based on 2D layers extended by Pt–CN–Fe linkages with different interlayer structures depending on the nature of the axial co‐ligand. The stpy co‐ligand forms one‐directional π–π networks between the layers, whereas pep forms two‐directional π–π networks as a result of its perpendicularly twisted structure. Coordination polymer 1 exhibits a half‐spin transition with T c ↓ = 106 K and T c ↑ = 110 K. In contrast, coordination polymer 2 shows a sharp, two‐step spin transition in the temperature range 184–236 K. The difference in spin‐transition behavior is discussed in terms of the interlayer packing structure.