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Field‐Induced Single‐Ion‐Magnetic Behavior of Octahedral Co II in a Two‐Dimensional Coordination Polymer
Author(s) -
Mondal Amit Kumar,
Khatua Sajal,
Tomar Kapil,
Konar Sanjit
Publication year - 2016
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.201600569
Subject(s) - chemistry , octahedron , coordination polymer , ion , crystallography , field (mathematics) , polymer , inorganic chemistry , organic chemistry , mathematics , pure mathematics
Two 2D coordination polymers have been synthesized by employing V‐shaped flexible terpyridine‐based ligand L [L = 4′‐(4‐methoxyphenyl)‐4,2′:6′,4′′‐terpyridine] as linker and M II (M = Co II , Fe II ) as nodes. Structural analysis of both complexes revealed the formation of a rare [4+4] metallocyclic unit. The extension of these cyclic units into two dimensions gives rise to an interdigitated 2D sheet structure in which the methoxy group of the ligand is oriented above and below the sheet to form crests and troughs. Detailed dc and ac magnetic susceptibility measurements revealed the field‐induced slow magnetic relaxation behavior of the magnetically isolated six‐coordinate Co II center with easy‐plane magnetic anisotropy. The effective energy barrier ( U eff ) was found to be 36.9 K, which is the highest value reported so far for 2D Co II ‐based single‐ion magnets.