New Organic-Inorganic Hybrid Nanoporous Phosphates And Silicates: Synthesis, Characterization And Their Adsorption, Optical And Catalytic Applications

Abstract

Microporous and mesoporous oxides, phosphates, borates, aluminates, silicates, organicinorganic hybrids, organic polymers etc. remain in the centre of research interest due to their versatile applications in many frontier areas of chemical and physical sciences like symmetric/asymmetric catalysis, gas storage and optoelectronics. Often the structure directing agents (SDA) used in the synthesis of non-silica based mesostructured materials keeping the mesoporous framework intact is a very challenging task. So my aim was to synthesis organicinorganic hybrid microporous and mesoporous phosphonates and silicates materials from the tailor made organic precursor molecules. These precursor molecules were designed in such a way that the final nanoporous materials had ion-exchange, adsorption, emission, sensing, or catalytic properties etc. Moreover, depending on the nature of the functional groups grafted at the surface of the designed microporous and self-assembled mesoporous organic-inorganic hybrid materials their applications in gas and metal-ion adsorption, optical and catalytic properties were explored. This thesis gives a comprehensive report on the results of the synthesis of porous hybrid tin phosphonates, sulphonated zinc phosphonate, self-assembled titanium phosphonate, iron phosphonate and phosphonic acid functionalized periodic mesoporous organosilica materials together with their catalytic and optoelectronics properties.The research was carried out under the supervision of Prof. Asim Bhaumik of the Materials Science division under the SMS [School of Materials Science]The research was conducted under CSIR fellowshi