Copper pyrazole directed crystallization of decavanadates: synthesis and characterization of {Cu(pz)} 4 [{Cu(pz) 3 } 2 V 10 O 28 ] and (Hpz) 2 [{Cu(pz) 4 } 2 V 10 O 28 ]·2H 2 O
2008; Royal Society of Chemistry; Volume: 11; Issue: 4 Linguagem: Inglês
10.1039/b815840a
ISSN1466-8033
AutoresJ. Thomas, Monika Agarwal, Arunachalam Ramanan, Natasha A. Chernova, M. Stanley Whittingham,
Tópico(s)Vanadium and Halogenation Chemistry
ResumoCrystal engineering of two new fully oxidized decavanadate based 1-D solid {Cu(pz)4}[{Cu(pz)3}2V10O28], 1 and a 2-D inorganic–organic hybrid solid (Hpz)2[{Cu(pz)4}2V10O28]·2H2O, 2 have been effected under self-assembly condition. 1 contains 1-D anionic chains of the composition [{Cu(pz)3}2V10O28] intercalated with {Cu(pz)4}2+ as counter cations. 2 contains 2-D anionic sheets of the composition [{Cu(pz)4}2V10O28] incorporating pyrazolium counter cations and water molecules. Self-assembly of 1 and 2 is interpreted in terms of molecular recognition between reasonable soluble molecular species in the supramolecular reaction along the mechanistic approach proposed by Ramanan and Whittingham for rationalising metal–organic framework structures. Low temperature magnetic measurements of 1 and 2 show copper in divalent state with Curie behaviour. Crystal data: 1, triclinic, space group P-1, a = 11.671(1) Å, b = 11.976(1) Å, c = 12.900(1) Å, α = 100.226(2)°, β = 105.549(3)°, γ = 118.571(2)°, Z = 1; 2, triclinic, space group P-1, a = 11.582(2) Å, b = 11.659(1) Å, c = 12.451(1) Å, α = 114.660(3)°, β = 107.439(2)°, γ = 91.639(3)°, Z = 2.
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