Coordination polymers/MOFs

Functional properties of coordination polymers/MOFs

Infinite metal–organic coordination networks have emerged as a prolific sub– discipline in supramolecular chemistry and crystal engineering due to their potential applications in molecular adsorption and separation, ion exchange, magnetism, optoelectronics, sensor technology and catalysis. A coordination polymer is formed when a potentially bridging ligand is reacted with a metal ion which has more than one vacant or labile site.Intriguing coordination polymers were synthesised using these ligands and the material properties such as gas adsorption, anion recognition etc. and structural diversities due to ligand conformations and hydrogen bonding backbone of ligands in these coordination polymers have been investigated. A novel robust microporous architecture stabilized by hydrogen bonds was revealed by X–ray diffraction and gas adsorption studies (CrystEngComm, 2006, 8, 805). We have investigated a new strategy to create microporous metal–organic framework (MOF) by assembling nano–rod like constructs equipped with a complementary hydrogen–bonding surface namely, a urea backbone and sulfate anion resulting in a stable guest–free microporous MOF (Cryst. Growth & Des. 2007, 7, 205). Also, increasing the chain length of bridging ligands, it is possible to switch from coordination complexes to polymers (Inorg. Chim. Acta. 2009, 362, 1767).

 

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