Al³⁺- Phenanthroline Xerogel for Dual Application: Catalyst for Knoevenagel Condensation and Fluorescent Chemosensor for Azo Dyes

Abstract

New Al3+ metal co‐ordinated organic xerogel (named AlPDAX) based on 1,10‐phenanthroline‐2,9‐dicarboxylic acid is synthesized. Xerogel is characterized by TGA, FTIR, PXRD and SEM analysis. Xerogel AlPDAX is evaluated for its catalytic activity in Knoevenagel condensation reaction. It shows a good catalytic activity and recyclability even after 5 cycles. Xerogel being fluorescent in nature is also utilized as template for recognition of industrially relevant azo dyes with help of fluorescence spectroscopy. It was observed that most of the azo dyes were recognized by AlPDAX with preferential affinity towards brilliant yellow azo dye. The practical application of AlPDAX as azo dye chemosensor is also observed by evaluating the fluorescence behaviour of AlPDAX against mixture of ‘brilliant yellow’ azo dye and coloured food items in which azo dye are used as adulterants.

Novel Iron(III)-Based Metal–Organic Gels with Superior Catalytic Performance toward Luminol Chemiluminescence

“…Metal–organic gels (MOGs), emerging as a new type of metal–organic hybrid material, are rapidly built up by straightforwardly assembling organic ligands and metal ions through metal–ligand coordination and noncovalent interactions, wherein the formation of chemical bonds, hydrogen bonding, π–π stacking, van der Waals forces, and ionic interaction play very important roles. − Impressively, MOGs not only can respond sensitively to environmental stimuli such as the change of pH, sonication, light, and temperature but also exhibit a high surface area, porous structure, and high thermal stability. , Because of their unique properties, MOGs have continuously received tremendous attention in diverse applications including sensing, − adsorption, , light-emitting diodes, − drug delivery, , and environmental pollution abatement. − Especially in the field of catalysis, the transition metal-containing MOGs as catalysts displayed immense importance and outstanding performance in the field of catalysis due to their high efficiency, low-cost, easy availability, and nontoxic nature. − However, to the best of our knowledge, the utilization of MOGs as catalysts for luminol chemiluminescence (CL) has been rarely reported.…”

Ultrasonication‐assisted Synthesis of α, β‐Unsaturated Compounds Catalyzed by Amino‐functionalized FDU‐12 Catalyst

“…Knoevenagel condensation reaction is one of the most important carbon–carbon bond formation reactions, which is widely used to manufacture α , β ‐unsaturated compounds . This reaction can be accomplished by treating a aldehyde with an active methylene compound in the presence of various homogeneous or heterogeneous basic catalysts, such as sodium carboxymethylcellulose, metal co‐ordinated organic xerogel, ionic liquids, nitrogen doped CN x , Pd/AlO(OH), et al.. However, there are some shortcomings for these reported catalysts, such as low activity, non‐environmentally friendly solvents requirement and unrecyclable .…”

Metal Complexes of Adenine Azo Ligand: Synthesis, Identification and Study some of their Applications

“…The SEM images for the ligand (PAA) and (Sm) complex, respectively, are shown in Figures 15-16. The ligand (SAA) was observed in the SEM image to be aggregated, spherical, nonuniform, and to have a smooth surface with an average (D=33.19nm) [32]. As [Sm(PAA)3]Cl3.3H2O, it has been depicted as aggregated, spherical, and non-uniform particles with a smooth surface and an average (D=72.67 nm) in the SEM image.…”