Aldol condensation in PEG-400 catalyzed by recyclable<scp>l</scp>-proline supported on nano gold surface

Kumar, Ajeet; Dewan, Manika; De, Arnab; Saxena, Amit; Aerry, Swati; Mozumdar, Subho

doi:10.1039/c2ra22522k

Cited by 17 publications

(10 citation statements)

References 29 publications

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“…Heterogeneous catalysts are simple of giving, straightforward workup and regenerability [48]. Numerous heterogeneous catalyst have been created to advance Claisen-Schmidt response, for example, the SO 3 H-functionalized ionic fluids [49], L-proline-Cysteine conjugate on functionalized Au nanoparticles and reproduced hydrotalcite [50,51]. Among these, numerous zeolite based catalyst has been accounted for as heterogeneous catalyst for the blend of chalcone and its subsidiaries.…”

Section: Introductionmentioning

confidence: 99%

Spinel zinc ferrite nanoparticles: an active nanocatalyst for microwave irradiated solvent free synthesis of chalcones

Borade

Somvanshi

Kale³

et al. 2020

Mater. Res. Express

120

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A profoundly effective magnetically recoverable nano zinc ferrite nanocatalyst was fabricated by means of sol-gel auto ignition strategy. The synthesized nanocatalyst has been completely portrayed by standard techniques for structural, morphological, compositional, surface, magnetic, dielectric, optical and photoluminescence properties individually. The x-ray diffraction pattern affirmed the arrangement of cubic spinel structure with an average crystallite size of 21 nm. FE-SEM images uncovered the circular morphology with nanometric average grain measure (37 nm). The surface area, pore volume and pore radius was observed to be 39.812 m 2 g −1 , 3.41 cc g −1 and 1.34 nm individually from BET analysis. VSM investigation demonstrated the superparamgnetic nature of the prepared sample with moderate magnetization value and negligible coercivity. The optical band gap deduced from UV-vis spectra was observed to be 2.098 eV. Every one of these properties of zinc nanoferrite makes them brilliant contender for microwave radiation absorption. Further, a proficient and versatile microwave irradiated solvent free synthesis of chalcone derivatives has been developed using prepared zinc nanoferrite catalyst. The remarkable highlights of this new protocol are solvent free reaction, economical cheapness, eco-friendliness, high yields, reduced reaction times and easy recovery and reuse of zinc ferrite nanocatalyst.

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Section: Introductionmentioning

confidence: 99%

Spinel zinc ferrite nanoparticles: an active nanocatalyst for microwave irradiated solvent free synthesis of chalcones

Borade

Somvanshi

Kale³

et al. 2020

Mater. Res. Express

120

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“…Our group has reported the use of nanoparticles in biomedical applications 37,38 and catalysis [39][40][41][42][43][44][45][46][47][48][49][50][51][52] in the past. Here we have demonstrated the use of gold nanoparticles for immobilization of urease, a technique that could potentially be used to immobilize other relevant proteins and bioactive peptides.…”

Section: Resultsmentioning

confidence: 99%

pH‐dependent immobilization of urease on glutathione‐capped gold nanoparticles

Garg

Mozumdar

2014

J Biomedical Materials Res

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Urease is a nickel-dependent metalloenzyme that catalyzes the hydrolysis of urea to form ammonia and carbon dioxide. Although the enzyme serves a significant role in several detoxification and analytical processes, its usability is restricted due to high cost, availability in small amounts, instability, and a limited possibility of economic recovery from a reaction mixture. Hence, there is a need to develop an efficient, simple, and reliable immobilization strategy for the enzyme. In this study, the carboxyl terminated surface of glutathione-capped gold nanoparticles have been utilized as a solid support for the covalent attachment of urease. The immobilization has been carried out at different pH conditions so as to elucidate its effect on the immobilization efficiency and enzyme bioactivity. The binding of the enzyme has been quantitatively and qualitatively analyzed through techniques like ultraviolet-visible spectroscopy, intrinsic steady state fluorescence, and circular dichorism. The bioactivity of the immobilized enzyme was investigated with respect to the native enzyme under different thermal conditions. Recyclability and shelf life studies of the immobilized enzyme have also been carried out. Results reveal that the immobilization is most effective at pH of 7.4 followed by that in an acidic medium and is least in alkaline environment. The immobilized enzyme also exhibits enhance activity in comparison to the native form at physiological temperature. The immobilized urease (on gold glutathione nanoconjugates surface) can be effectively employed for biosensor fabrication, immunoassays and as an in vivo diagnostic tool in the future.

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“…In the continuation of our efforts to design and synthesize the nanostructured material for catalytic applications. [29][30][31][32][33][34] Connement of the silver nanoparticles in the nanochannels of this newly designed dendritic brous nanosilica over cubic core (cSiO 2 @DFNS) is being reported in this article. The obtained core-shell brous silica particles with supported Ag nanoparticles (cSiO 2 @DFNS@Ag) have been employed as an efficient catalyst in the reduction of nitroarenes and degradation of organic dyes using NaBH 4 as reducing agent.…”

Section: Introductionmentioning

confidence: 93%

Synthesis of dendritic fibrous nanosilica over a cubic core (cSiO₂@DFNS) with catalytically efficient silver nanoparticles for reduction of nitroarenes and degradation of organic dyes

et al. 2020

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Aldol condensation in PEG-400 catalyzed by recyclablel-proline supported on nano gold surface

Cited by 17 publications

References 29 publications

Spinel zinc ferrite nanoparticles: an active nanocatalyst for microwave irradiated solvent free synthesis of chalcones

Spinel zinc ferrite nanoparticles: an active nanocatalyst for microwave irradiated solvent free synthesis of chalcones

pH‐dependent immobilization of urease on glutathione‐capped gold nanoparticles

Synthesis of dendritic fibrous nanosilica over a cubic core (cSiO₂@DFNS) with catalytically efficient silver nanoparticles for reduction of nitroarenes and degradation of organic dyes

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Aldol condensation in PEG-400 catalyzed by recyclablel-proline supported on nano gold surface

Cited by 17 publications

References 29 publications

Spinel zinc ferrite nanoparticles: an active nanocatalyst for microwave irradiated solvent free synthesis of chalcones

Spinel zinc ferrite nanoparticles: an active nanocatalyst for microwave irradiated solvent free synthesis of chalcones

pH‐dependent immobilization of urease on glutathione‐capped gold nanoparticles

Synthesis of dendritic fibrous nanosilica over a cubic core (cSiO2@DFNS) with catalytically efficient silver nanoparticles for reduction of nitroarenes and degradation of organic dyes

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Synthesis of dendritic fibrous nanosilica over a cubic core (cSiO₂@DFNS) with catalytically efficient silver nanoparticles for reduction of nitroarenes and degradation of organic dyes