| Abstrakt: |
Three new metal–organic frameworks, namely [Co(μ-L1)2(Cl)2]n1, [Cd(µ-L1)2(NO3)2]n2and [{Co(μ-L1′)(H2O)4}.SO4·3(H2O)]n3(L1= N,N′-bis-(4-pyridyl)isophthalamide, L1′ = N,N′-bis-(3-pyridyl)isophthalamide) have been synthesized and characterized. The single crystal structures of 1–3and the free ligand L1are discussed in the context of the effect of positional isomerism of the ligands, hydrogen bonding backbone and counter anions on the supramolecular structural diversities observed in these MOFs. Selective crystallization of the sulfate anion from a mixture of L1′, CoSO4, Co(NO3)2, Co(ClO4)2, Co(OAc)2, Co(BF4)2was evident from the isolation of 3which was confirmed by powder X-ray diffraction, elemental analysis and IR data. [ABSTRACT FROM AUTHOR] |
