Papers by Dr. Arvind Jadhav
Chemical Engineering Journal, 2015
A range of new compounds incorporating the triphenylsilanetellurolate ligand has been prepared an... more A range of new compounds incorporating the triphenylsilanetellurolate ligand has been prepared and characterized. The required starting material was prepared by insertion of tellurium into the Li-Si bond of (THFIsLiSiPh3, which gave (THF)aLiTeSiPhs in high yield. Protonolysis of (THF)sLiTeSiPha with trifluoroacetic acid resulted in the formation of the tellurol HTeSiPh3 which is the first tellurol to be structurally characterized; it crystallized in the monoclinic space group C2/c with a = 16.208(3) A, b = 11.343(3) A, c = 19.979(3) A, = 114.45", 2 = 8, R = 0.0328, and R, = 0.0409. The disilyl telluride Te(SiPhd2 was prepared by reaction of (THF)sLiTeSiPhs with PhsSiCl. The metallocene compounds (RCp)2M(TeSiPh& (M = Ti, R = H, Me (Cp'); M = Zr, R = H, But (Cpt); M = Hf, R = H, But) were made by treatment of the appropriate metallocene dichloride with (THFIsLiTeSiPhs. Reaction of Cpt2Zr(TeSiPh3)2 with tert-butylpyridine gave clean elimination of Te(SiPhd2 to form (c~$ Z r T e)~ as the only metal-containing product. Kinetic studies showed the reaction to be first-order in metallocene tellurolate, implicating a mechanism involving intramolecular elimination of disilyl telluride. The X-ray structure of CpzZr(TeSiPh& is also described; it crystallized in the monoclinic space group P21h with a = 9.460(1) A, b = 26.177(2) A, c = 16.442(1) A, , ! ? = 96.79(1)", 2 = 4, R = 0.0277, and R, = 0.0313. Supplementary Material Available: Tables of positional parameters, intramolecular distances and angles, leastsquares planes, and anisotropic thermal parameters for all structures (18 pages). Ordering information is given on any current masthead page.
Materials Chemistry Frontiers, 2021
TMD-decorated MXene hybrids have emerged as alternatives for energy storage and conversion applic... more TMD-decorated MXene hybrids have emerged as alternatives for energy storage and conversion applications. Herein, recent progress, role of the unique junctions of TMD–MXene hybrids and their challenges for further improvement has been reviewed.
Materials Science and Engineering: C, 2021
Cellulose nanofibers, which are troublesome to spin into fibers, can be easily fabricated by post... more Cellulose nanofibers, which are troublesome to spin into fibers, can be easily fabricated by post-regeneration of its acetate-derived threads. Cellulose is a natural polymer; it enjoys better biocompatibility, cellular mimicking, and hydrophilic properties than its proportionate analog. Herein, we regenerated acetate-free nanofibers by alkaline de-acetylation of as-spun nanofibers. The resultant cellulose nanofibers previously loaded with hydroxyapatite (HAp) were immobilized using silver (Ag) nanoparticles (NPs) by reduction of adsorbed Ag ions on using sodium borohydride. These amalgamated nanofibers were characterized for SEM, EDX, TEM, FTIR, and hydrophilicity tests revealing the existence of both HAp and Ag NPs in/on the nanofiber scaffolds. The deacetylation of composite nanofibers resulted in spontaneous hydrophilicity. These nanofibers were cytocompatible, as resolved by MTT assay conducted on chicken embryo fibroblasts. The SEM of the samples after cell culture revealed that these composites allowed a proliferation of the fibroblasts over and within the nanofiber network, and increased concentration of HAp levitated the excessive of apatite formation as well as increased cell growth. The antimicrobial activity of these nanofibers was assessed on E. coli (BL21) and S. aureus, suggesting the potential of de-acetylated nanofibers to restrain bacterial growth. The degradation study for 10, 30, and 60 days indicated degradation of the fibers much is faster in enzymes as compared to degradation in PBS. The results certify that these nanofibers possess enormous potential for soft and hard tissue engineering besides their antimicrobial properties.
Advanced sustainable systems, Jul 26, 2023
New Journal of Chemistry, 2020
A room temperature-based ionic liquid [bmim]Cl-catalyzed multicomponent coupling strategy for the... more A room temperature-based ionic liquid [bmim]Cl-catalyzed multicomponent coupling strategy for the synthesis of 3-alkylamino-2-alkyl/aryl/hetero-aryl indolizine-1-carbonitrile derivatives under mild conditions is shown.
Energy & Fuels
This work demonstrates the development of mesoporous trimetallic oxide scaffolds (TOSs) as hetero... more This work demonstrates the development of mesoporous trimetallic oxide scaffolds (TOSs) as heterogeneous catalysts for the solvent-free transformation of CO 2 into various value-added products. The TOS catalyst was prepared using a solution-combustion protocol as a time-and energy-saving method using cobalt, magnesium, and cerium metal nitrate salts as precursors and ethylene glycol as the fuel system and compared with their monometallic counterparts. Characterization suggested strong metal−metal and metal−oxygen interactions in the 3Dinterconnected hierarchical porous network, which resulted in substantial alteration in the electronic, structural, and physicochemical properties. This resulted in an appreciable surface area, acid−base cooperative sites, and a larger pore volume in the catalyst. Thereafter, the CoMgCe-TOS catalyst was first used for the solvent-free cyclization of o-phenylenediamines and CO 2 to produce benzimidazoles. In the presence of dimethylamine borane as a reductant, benzimidazoles were obtained in 94% yield at 100°C under pressurized conditions, along with good recyclability for 12 cycles. It was established that selectivity toward benzimidazole improved upon the incorporation of basic metals (Mg and Ce), with Co aiding in the formation of cooperative Lewis acid−base sites. A plausible mechanism was also predicted, wherein the overall conversion of reactants for the N-formylation step was influenced by the number and strength of basic sites, and the cyclization step for selectively obtaining benzimidazole was affected by the acidic site strength. Besides the production of benzimidazole, the catalyst was also highly active for the synthesis of cyclic carbonates using epoxides and CO 2 under optimized reaction conditions. This work therefore provides a new and greener route for the synthesis of benzimidazoles and organic carbonates, which can be easily adapted for scale-up applications.
Journal of Materials Chemistry A
This review addresses the recent development and progress in the synthesis of noble and non-noble... more This review addresses the recent development and progress in the synthesis of noble and non-noble metal-based sulphide, oxide, hydroxide, and phosphide nanosponges, as well as their application in electrochemical storage and conversion devices.
RSC Advances, 2022
Sustainable renewable energy production is being intensely disputed worldwide because fossil fuel... more Sustainable renewable energy production is being intensely disputed worldwide because fossil fuel resources are declining gradually.
Materials and Manufacturing Processes, 2021
ABSTRACT In this work, a uniquely designed imidazolium-based dicationic ionic liquid (IL) was syn... more ABSTRACT In this work, a uniquely designed imidazolium-based dicationic ionic liquid (IL) was synthesized as a greener template and applied for the synthesis of ZSM-5 zeolite as a heterogeneous catalyst for the dehydration of fructose to 5-hydroxymethylfurfural (HMF). Characterization results confirmed that due to the presence of dicationic IL as template, effective interactions and structural alterations occurred during the construction of zeolitic framework wherein the vertices of ZSM-5 consisting of Al or Si and O elements were assumed to be bonded between the vertices of dicationic IL-assisted zeolite ZSM-5 catalyst. This resulted in superior structural advantages such as highly crystalline nature and stability as well as variation in mesopores when compared to commercial ZSM-5. Additionally, various reaction variables were investigated wherein synthesized dicationic IL-assisted ZSM-5 zeolite catalyst in the presence of [BMIm][Cl] as solvent demonstrated 95% conversion of fructose and 67.2% yield of HMF at 110°C within 90 min. The altered surface area and porous nature of synthesized ZSM-5 due to the presence of dicationic IL as template was responsible for the enhanced catalytic performance under mild reaction conditions. Most significantly, being a solid catalyst, the newly developed dicationic IL-assisted zeolite ZSM-5 catalyst showed recyclability for four recycles.
New Journal of Chemistry, 2021
An eco-friendly green method for a one-step synthesis of palladium nanoparticles and their synthe... more An eco-friendly green method for a one-step synthesis of palladium nanoparticles and their synthetic utility are reported.
Catalysis Letters, 2020
A regioselective C2 arylation of indoles, benzothiophene and benzofuran without directing group h... more A regioselective C2 arylation of indoles, benzothiophene and benzofuran without directing group has been accomplished using economically cheap Pd NPs and NHC-Pd@MNPs catalyst. The reusable catalyst is efficiently employed to access C2 arylated heterocycles in good to excellent yield. The reusability of the catalyst is studied up to five cycles and a gram-scale synthesis has been achieved. The reaction mechanism is well supported by control experiments and literature precedents.
New Journal of Chemistry, 2019
Copper-based ceria catalysts were synthesized for the dehydrogenation of 1,4-BDO to GBL and resul... more Copper-based ceria catalysts were synthesized for the dehydrogenation of 1,4-BDO to GBL and results exhibited a conversion of 93% and 98% selectivity with stable activity for up to 7 h.
Letters in Organic Chemistry, 2019
Zinc sulfamate (Zn(NH2SO3)2 is a derivative of sulfamic acid (H3NSO3) which possesses “Lewis acid... more Zinc sulfamate (Zn(NH2SO3)2 is a derivative of sulfamic acid (H3NSO3) which possesses “Lewis acidity” and finds well suited in a number of catalytic applications. The present paper describes an efficient, eco-friendly, and clean synthesis of 2-substituted benzimidazole derivatives by reacting diverse o-phenylenediamine with various substituted aromatic aldehydes using a catalytic amount of zinc sulfamate in ethanol at ambient temperature. As a result, 10 mol.% of Zinc sulfamate catalyst showed 92% of respective product yield with 100% conversion using short reaction period in ethanol. Meanwhile, effect of reaction parameters, such as amount of catalyst, different solvents, and reaction temperature on reaction product, was also studied. In addition, in the optimized reaction condition various substituted biological important benzimidazoles derivatives were prepared by using optimized reaction condition in good to efficient yield. In addition, possible reaction mechanism in the presen...
Catalysis Communications, 2012
ABSTRACT Dicationic room temperature ionic liquids (RTILs), with short oligo ethylene glycol link... more ABSTRACT Dicationic room temperature ionic liquids (RTILs), with short oligo ethylene glycol linkers have been found to be highly active catalyst for the selective dehydration of fructose and sucrose into 5-hydroxymethylfurfural (HMF). The bis (N-methylimidazolium) cations containing short oligo ethylene glycol linkers and mesylate (CH3SO3−) anions based ILs were employed in catalytic amount for sugar dehydration reactions. As a result, 92.3% of HMF yield was obtained from fructose in 40 min with one equivalent of [TetraEG(mim)2][OMs]2 at 120 °C. While, 67.2% of HMF was achieved from dehydration of sucrose at 120 °C in 150 min using two equivalents of [TetraEG(mim)2][OMs]2. Among those dicationic RTILs, [TetraEG(mim)2][OMs]2 RTIL was observed to be the most efficient catalyst, demonstrated by its ability to achieve 100% conversion and highest yield of HMF. In addition, effect of reaction time, molar ratio, temperature, and co-catalyst effect were discussed. The use of dicationic RTILs as a catalyst in sugar dehydration greatly reduces the equimolar ratio of catalyst and reaction time required for conversion of sugar into HMF.
ACS Omega, 2022
Solvent-based recycling of plastic can offer the main improvement when it is employed for pyrolys... more Solvent-based recycling of plastic can offer the main improvement when it is employed for pyrolysis-catalytic steam reforming. In this research, plastic waste dissolved in phenol was used as a feed for catalytic cracking and steam reforming reactions for valuable liquid fuels and hydrogen production, which is gaining the attention of researchers globally. Microplastic wastes (MPWs) are tiny plastic particles that arise due to product creation and breakdown of larger plastics. They can be found mainly in several habitats, including seas and freshwater ecosystems. MPWs harm aquatic species, turtles, and birds and were chosen to recover in this study that can be reacted on the catalyst surface. Biphasic anatase-rutile TiO 2 with spherical-shaped support for Ni and Pd metals with nanosized particles was synthesized via the hydrothermal treatment method, and its chemical and physical properties were characterized accordingly. According to temperature-programmed desorption of carbon dioxide (CO 2-TPD) and temperature-programmed reduction of hydrogen (H 2-TPR) results, the incorporation of Pd into Ni/TNPs enhanced the basicity of the support surface and the redox properties of catalysts, which were strongly linked to the improved hydrogen yield (71%) and phenol conversion (79%) at 600°C. The Ni-Pd/TNPs nanocatalyst, with remarkable stability for 72 h of time on stream, is a promising catalyst for the MPW-phenol cracking and steam reforming reactions toward H 2 production for clean energy generation and other environmental applications. Besides, this study has also highlighted the opportunities of overcoming the risk of microplastic waste and converting it into valuable fuels such as decamethyltetrasiloxane, phenanthrene, methyl palmitate, benzenepropanoic acid, benzoic acid, azulene, xanthene, anisole, biphenyl, phthalic acid, diisooctyl phthalate, etc.
Catalysis Science & Technology, 2019
The present work demonstrates the chemical fixation of CO2 for the synthesis of organic carbonate... more The present work demonstrates the chemical fixation of CO2 for the synthesis of organic carbonates using mesoporous hollow marigold CuCo2O4 spinel microspheres as a catalyst prepared using the solvothermal method.
Russian Journal of Organic Chemistry
The reaction of 2-[bis(methylsulfanyl)methylidene]malononitrile with 1H-1,2,4-triazol-3-amine in ... more The reaction of 2-[bis(methylsulfanyl)methylidene]malononitrile with 1H-1,2,4-triazol-3-amine in N,N-dimethylformamide in the presence of anhydrous potassium carbonate led to the formation of 7-imino-5-(methylsulfanyl)-1,7-dihydro[1,2,4]triazolo[1,5-a]pyrimidine-6-carbonitrile. The latter was then reacted with some nitrogen and carbon nucleophiles such as substituted anilines and active methylene compounds to afford the corresponding 5-substituted derivatives. The structure of the synthesized compounds was confirmed by IR, NMR, and mass spectra and elemental analyses. Furthermore, their potential as antioxidant agents was evaluated using DPPH and hydroxyl radical scavenging assays.
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Papers by Dr. Arvind Jadhav