Premium
Phase Control of Ferromagnetic Copper(II) Carbonate Coordination Polymers through Reagent Concentration
Author(s) -
Mulrooney David Z. T.,
Clements John E.,
Ericsson Daniel J.,
Price Jason R.,
Kühne Irina A.,
Coles Simon J.,
Kepert Cameron J.,
Keene Tony D.
Publication year - 2018
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.201801041
Subject(s) - chemistry , superexchange , ferromagnetism , magnetic susceptibility , copper , crystallography , denticity , ligand (biochemistry) , coordination polymer , inorganic chemistry , pyridine , carbonate , crystal structure , ion , medicinal chemistry , organic chemistry , condensed matter physics , biochemistry , physics , receptor
A significant degree of control over the dimensionality and magnetic connectivity of Cu II carbonate coordination polymers is achieved through varying the concentration of ammonia in the reactant solution. Higher concentration leads to a two‐dimensional ferromagnetic [Cu 3 (2,4′‐bipy) 6 (CO 3 ) 2 ] n 2 n + kagome structure while lower concentration develops a ferromagnetic [Cu(2,4′‐bipy) 2 (H 2 O) 2 ][Cu(2,4′‐bipy) 2 (CO 3 ) 2 ] chain (where 2,4′‐bipy = 2,4′‐bipyridine). The carbonate anion in the structures arises from the fixation of atmospheric CO 2 by the basic ammonia solution. Modelling the magnetic susceptibility of 1 and 2 reveals ferromagnetic interactions with J/k B = +28.1 K for 1 and +13.99 K for 2 . ( H = – J ). The use of a monodentate polypyridine ligand results in the suppression of the superexchange pathway between layers in 1 , removing the metamagnetic behaviour seen in related compounds where a ditopic ligand presents the ability for the layer to couple antiferromagnetically. Attempts to substitute 2,4′‐bipy for 4‐( N , N ‐dimethylamino)pyridine (4‐dmap) result in a discrete species [Cu(4‐ampy) 4 ](ClO 4 ) 2 ( 3 ).