Design and development of organic inorganic hybrid material based on functionalized layered double hydroxide for organic transformation reaction

Abstract

newline Design and preparation of organic-inorganic hybrid material with their combining properties have attracted tremendous interest in their appliances in the industrial chemistry. The physicochemical combining properties of organic and inorganic constituents in one system open a new perception in the chemical industry. Development of organic-inorganic functional materials has turned into one of the smartest and budding themes in scientific research. So the creation of these hybrid functional materials endeavors to merge the benefits of both the organic and inorganic elements within the single material, which make possible intending of material with elevated structural, hydrothermal and mechanical stability of inorganic compound through the flexibility of organic materials. Here, we particularly address the utilization of organic-inorganic hybrid materials as heterogeneous catalysts as well as photocatalyst for sustainable and cleaner organic transformation reactions in fine chemical industries. The structural, textural, functional group determination, chemical state, optical, and morphological properties of these composites were characterized by various physicochemical techniques such as the PXRD, FTIR, scanning electron microscopy (SEM/ EDS/color mapping), transmission electron microscopy (TEM/ HR-TEM) and X-ray photoelectron spectroscopy (XPS), UV-Vis Diffuse reflectance spectroscopy (UV-Vis DRS), Photoluminescence (PL) spectra. newlineChapter-1 This chapter describes grafting reaction using organic functional molecules, which allows control creation of the active center on a nanoscale with greater thermal and chemical stability. This total grafting method provides improved quality of the modified LDH in terms of crystallinity, the extent of intercalation, thermal stability not affecting the local structure of the metal-oxygen framework. In this work, the basicity of hydrotalcite has been tuned for base catalyze aldol condensation under mild conditions and the catalyst system would be able to develop a clean and efficient industrial route for different applications. This piece of work particularly relates to the enhancement of the basicity of LDH for an eco-friendly process employing recyclable LDH/amines as a heterogeneous newlinevii newlinecatalyst in place of soluble bases for the preparation of aldols. The consistent activity for several cycles in aldol condensation makes the process economical and possible for commercial realization. Zn:Al layered double hydroxides-supported 3-aminopropyltriethoxysilane (APTES) and N-methyl 3-aminopropyltriethoxy silane