In:
European Journal of Inorganic Chemistry, Wiley, Vol. 2010, No. 24 ( 2010-08), p. 3750-3755
Abstract:
The syntheses and structures of three mixed‐ligand metal–organic frameworks (MOFs), {[M 2 (btec)(bpym)(H 2 O) 4 ] · 4H 2 O} n [M = Cu ( 1 ), Ni ( 2 )] and [Zn 4 (btec) 2 (bpym)(H 2 O) 6 ] n ( 3 ) (btec = benzene‐1,2,4,5‐tetracarboxylate, bpym = 5,5′‐bipyrimidine) are described. MOFs 1 and 2 feature 3D grid‐type frameworks with a cds ‐type topology, which are comprised of two mutually intersecting M(btec)‐based and M(bpym)‐based 4 4 ‐ sql layers. MOF 3 consists of an anionic 3D (4,4)‐connected pts network that is intersected by cationic hydrogen‐bonded 4 4 ‐ sql layers, [(H 2 O) 3 Zn(μ‐ anti ‐η 2 ‐bpym)Zn(H 2 O) 3 ] 4+ , thereby giving rise to a 3D network. The structural diversities between the two types of MOF architectures can be attributed to the coordination geometry preference of the metal ions (square planar for Cu II and Ni II and tetrahedral for Zn II ). In addition, temperature‐controlled X‐ray powder diffraction studies reveal that MOF 1 possesses reversible desorption/sorption properties upon the removal/uptake of water molecules. The magnetic behavior of 1 was investigated in the 2–300 K range. The data indicate the presence of weak antiferromagnetic interactions between the two Cu II metal centers that are bridged by a pyrimidine ring.
Type of Medium:
Online Resource
ISSN:
1434-1948
,
1099-0682
DOI:
10.1002/ejic.v2010:24
DOI:
10.1002/ejic.201000291
Language:
English
Publisher:
Wiley
Publication Date:
2010
detail.hit.zdb_id:
1475009-0
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