In:
European Journal of Inorganic Chemistry, Wiley, Vol. 2018, No. 48 ( 2018-12-31), p. 5223-5228
Abstract:
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 ).
Type of Medium:
Online Resource
ISSN:
1434-1948
,
1099-0682
DOI:
10.1002/ejic.v2018.48
DOI:
10.1002/ejic.201801041
Language:
English
Publisher:
Wiley
Publication Date:
2018
detail.hit.zdb_id:
1475009-0
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