Synthesis and Characterization of Heterogeneous Nano-Catalyst for the Production of Biodiesel from Pongamia Pinnata Oil Science and Technology Asia, 2025
Design, Synthesis, and Characterization of Polyoxotungstate-Decorated Ionic Liquid-Based Hybrid Material, [BmIm]4[SiW12O40] toward Rapid Adsorption of Dye and Antibacterial Activities Sangita Das, Bibaswan Sen, Sudeshna Sarkar, Indrajit Das, Nayim Sepay, Sayantani Paul, Supratim Mandal, Adhiraj Roy, Magdalena Malecka, Sk Jahir Abbas, Ranga Rao Gangavarapu, Badathala Vijayakumar, Sk Imran Ali Inorganic Chemistry, 2024 A multifunctional polyoxometalate-ionic liquid (POM-IL)–based hybrid material comprising silicotungstic acid, [BmIm] 4 [SiW 12 O 40 ], has been synthesized and demonstrated its efficiency toward methylene blue removal and as an antibacterial agent. Single-crystal XRD analysis confirms that the material crystallizes in monoclinic symmetry (SG: Pn ), with lattice parameters a = 13.1396(5) Å, b = 16.9655(8) Å, c = 14.3493(7) Å, and Z = 2. The structure comprises a single polyanionic [SiW 12 O 40 ] 4– moiety surrounded by four cationic [BmIm] + units of two different conformations, which supported DFT and Hirshfeld surface analysis. The material shows excellent removal efficiency for methylene blue, with a maximum adsorption capacity of 92.47 mg/g and 83.05% reusability after five cycles. On the contrary, FTIR and ζ–potential analyses confirm that electrostatic interactions are the predominant factors governing the adsorption process. The material also acts as a superior antibacterial agent against the opportunistic pathogens Pseudomonas aeruginosa, Klebsiella pneumoniae, and Escherichia coli with a MIC of 500–700 μg/mL. However, a comparative assessment showed that the material was more effective against P. aeruginosa compared to the other two pathogens. PXRD analysis confirms the phase purity, and FESEM and TEM analyses exhibit block-shaped morphology with particle sizes ∼2–3 μm.
Boric acid supported on montmorillonites as catalysts for synthesis of 2,3-dihydroquinazolin-4(1H)-ones Iranian Journal of Chemistry and Chemical Engineering, 2019
Synthesis of moxifloxacin–Au (III) and Ag (I) metal complexes and their biological activities Kondaiah Seku, Anil Kumar Yamala, Mahesh Kancherla, Kishore Kumar K, Vijayakumar Badathala Journal of Analytical Science and Technology, 2018 BackgroundThe drug-metal complexes are used to control the growth of pathogens and parasites which are harmful to humans. Moxifloxacin (MOX) is a new fourth generation 8- methoxy fluoroquinolone. Its chemical name is [1-cyclopropyl-7-(S,S)-2,8-diazabicyclo(4.3.0)- non-8-yl-6-fluoro-8-methoxy-1,4-dihydro-4-oxo-3-quinoline carboxylic acid hydrochloride]. Many researchers have reported Moxifloxacin-metal complexes with transition metals and studied their biological applications. We have synthesized novel moxifloxacin- Au(III) and Ag(I) metal complexes ([Au(MOX) 2 (Cl) 2 ].2H 2 O and [Ag (MOX) 2 ].2H 2 O), characterized, and found their biological activities.MethodsMoxifloxacin- Au(III) and Ag(I) metal complexes were prepared by adding corresponding aqueous solutions of Au(III) and Ag(I) metal salts to methanolic solution of Moxifloxacin. These metal complexes were characterized by physio-chemical techniques like UV-Vis, 1 H- NMR, FTIR, XRD, DSC, TGA, SEM and microanalytical data. The disc diffusion method was used to study the antibacterial activity of the Moxifloxacin-metal complexes.ResultsThe structural assessment of these complexes has been carried out based on physio- chemical and spectroscopic methods. The powder X-ray diffraction data of the metal complexes revealed moderate crystallinity. SEM analysis confirms that [Ag(MOX) 2 ].2H 2 O complex has small rods like morphology whereas [Au(MOX) 2 (Cl) 2 ].2H 2 O has well crystalline rods like morphology. The results from DSC of moxifloxacin- Au(III) and Ag(I) metal complexes revealed the interaction between the drug and metals. Further, Au & Ag moxifloxacin metal complexes have shown significant antibacterial activity against gram-positive and gram-negative bacteria.ConclusionsThe spectral and analytical results clearly confirmed the coordination chemistry of Au (III) and Ag (I) Moxifloxacin metal complexes. The IR, electronic transition and elemental data led to the conclusion that the geometry of the complex of Au(III) is octahedral and that of Ag (I) complex is tetrahedral. The [Ag(MOX) 2 ].2H 2 O complex has showed good antibacterial activity compared to [Au (MOX) 2 (Cl) 2 ].2H 2 O metal complex. The antibacterial activity studies indicate the metal complexes have more biological activity than free ligand.
Aluminium exchanged Indian clay as an efficient reusable green catalyst for synthesis of 2, 3-dihydroquinazolin-4(1H)-one derivatives Mahesh Kancherla, Vijayakumar Badathala Journal of Porous Materials, 2017 Aluminium exchanged Indian clay (Al3+-ExIC) catalyzed synthesis of 2, 3-dihydroquinazolin-4(1H)-one derivatives in good to excellent yields has been reported. The catalyst has been characterized for its physico-chemical properties. Effects of solvent, molar ratio, amount of catalyst and reaction time on the yield of 2-phenyl-2, 3-dihydroquinazolin-4(1H)-one and recyclability of the catalyst have been investigated. Various 2, 3-dihydroquinazolin-4(1H)-one derivatives have been obtained in good to excellent yields.
Chemical synthesis and characterization of thoria incorporated yttria ceria-stabilized zirconia nano particles for high temperature applications Digest Journal of Nanomaterials and Biostructures, 2017
Synthesis of ester components of spermaceti and a jojoba oil analogue catalyzed by acid activated Indian bentonite under microwave irradiation Indian Journal of Chemical Technology, 2009
Direct esterification of carboxylic acids with p-cresol catalysed by acid activated Indian bentonite Indian Journal of Chemistry Section B Organic and Medicinal Chemistry, 2005
Synthesis of p-tolyl stearate catalyzed by acid activated Indian bentonite Indian Journal of Chemical Technology, 2005
An eco-friendly method for the synthesis of aryl and alkyl esters of carboxylic acids using acid activated Indian bentonite Journal of the Indian Chemical Society, 2005
