Design and synthesis of various organic linkers for the construction of conducting MOFS

Abstract

Porous crystalline materials are one of the emerging and most promising branches of material chemistry, comprising of zeolites, metal organic frameworks, covalent organic frameworks and porous organic cages. The use of crystalline porous networks like Metal Organic Framework (MOF) have attracted enormous attention due to their porosity, tunable nature, chemical stability, long-range order, large surface area, high thermal and chemical stability, electronic interactions, charge carrier transport, efficient photocatalytic activity, tunable band gap, visible light absorbance and most important cost effectiveness etc. The work described in this thesis concerns the synthesis of 1,1',1''- (benzene-1,3,5-triyltris(methylene))tris(4-carboxypyridin-1-ium)bromide (H4L1), 5,5'-((naphthalene-2,6-diylbis(methylene)) bis(oxy)) diisophthalic acid (H4L2), 1,1',1''-(benzene-1,3,5-triyltris(methylene))tris(4- carboxypyridin-1-ium) bromide (H3L3), Characterization of 1,1',1''- (benzene-1,3,5-triyltris(methylene))tris(4-carboxypyridin-1-ium) phosph orouspenta flouride (H3L4) and 5,5'-(oxybis(methylene))diisophthalic acid (H4L5). These linkers have been characterized by 1H NMR spectroscopy and Mass spectrometry. Further H2L5 was utilized as linker in presence of Cu(NO3)2.3H2O under room temperature condition gave Cu-MOF with 3D structure, respectively. This Cu-MOF was characterized by single crystal X- ray diffraction (SC-XRD).