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Construction of bis-pyrazole based Co(II) metal-organic frameworks and exploration of their chirality and magnetic properties
Sudeshna Bhattacharya, Arijit Goswami, , Sumi Ganguly, Sukhen Bala, Satirtha Sengupta, Sumit Khanra, Raju Mondal
Published in
Volume: 14
Issue: 6
Pages: 2853 - 2865
In continuation of our interest in pyrazole based multifunctional metal-organic frameworks (MOFs), we report herein the construction of a series of Co(II) MOFs using a bis-pyrazole ligand and various benzene polycarboxylic acids. Employment of different acids has resulted in different architectures ranging from a two-dimensional grid network, porous nanochannels with interesting double helical features such as supramolecular chicken wire, to three-dimensional diamondoid networks. One of the distinguishing features of the network is their larger dimensions which can be directly linked to a relatively larger size of the ligand molecule. Conformational flexibility of the ligand also plays a decisive role in determining both the dimensionality and topology of the final structure. Furthermore, chirality associated with helical networks and magnetic properties of two MOFs have also been investigated. {\textcopyright} 2014 American Chemical Society.
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