Studies on mono-and poly-nuclear coordination complexes based on nitrile and in situ generated tetrazolate derivatives

Abstract

In the last few years, fabrication of metal-organic coordination complexes or polymers and supramolecular networks has been attracting the attention of scientific community because of their applications in various fields. The general methodology which is being used to generate such materials is the blending of linkers (organic molecules with bi- and/or poly dentate nature) and metal ions (very often transition metals). These components connect to each other usually by interactions like coordination covalent bond (in the formation of coordination complexes/polymers) and through secondary interactions like hydrogen bonds, ···  and C-H···  interactions generating supramolecular networks. Though there are reports of complexes with nitrile based ligands, however, use of 4-aminobenzonitrile (4-ABN) as a possible bridging moiety are relatively rare. On the other hand, the chemistry of tetrazolate ligands are well explored compared to their nitrile precursors. But, as most of these materials are being generated by hydro/solvothermal method, there is a significant demand for developing alternative procedures which can be executed in relatively energy efficient ways. Moreover, as it has been observed in some cases that, few nitriles behave strangely upon reacting with metal bound azides, therefore it is also interesting to explore the interactions of nitriles in presence of other functional groups with azide ion. The main objectives of present study are:  To explore the possibilities of obtaining metal complexes with various topologies using 4-aminobenzonitrile (4-ABN) as a possible linker.  To generate metal-tetrazolate coordination complexes/ polymers/metal-organic frameworks in non-solvothermal procedures and to explore their applicability towards catalysis and photoluminescence.  To study the interaction of platinum bound azide ions and nitriles which are in conjugation with C=C double bond.