CuO nanostructures of variable shapes as an efficient catalyst for [3 + 2] cycloaddition of azides with terminal alkyne

Kaur, Anupamjeet; Mann, Sukhmani; Goyal, Bhupesh; Pal, Bhupender

doi:10.1039/c6ra20725a

Cited by 19 publications

(9 citation statements)

References 93 publications

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“…Moreover, a small hump at 280 nm in the absorption spectrum of IPN1 could be attributed to ionic silver or charged clusters. This result confirmed the presence of embedded metal nanoparticles in the structure of hydrogels and is in agreement with previously published papers [35,36,37].…”

Section: Resultssupporting

confidence: 93%

pH-Responsive Hybrid Hydrogels as Antibacterial and Drug Delivery Systems

2018

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This study describes the design and synthesis of organic–inorganic hybrid hydrogels based on an interpenetrating polymer network (IPN) composed of polyaspartic acid crosslinked by graphene nanosheets as the primary network and poly(acrylamide-co-acrylic acid) as the secondary network. Silver, copper oxide, and zinc oxide nanoparticles were formed within the gel matrix, and the obtained hydrogel was applied to a load and controlled release of curcumin. The loading of curcumin and the release of this drug from the gels depended on the nanoparticle’s (NP’s) content of hydrogels as well as the pH of the medium. The synthesized hydrogels showed antibacterial activity against E. coli and S. aureus bacteria. The ability of the synthesized hydrogels to incapacitate bacteria and their loading capacity and controlled release of curcumin qualify them for future therapies such as wound-dressing applications.

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Section: Resultssupporting

confidence: 93%

pH-Responsive Hybrid Hydrogels as Antibacterial and Drug Delivery Systems

2018

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“…46 For UV-vis spectrum of CuO-rGO nanocomposites, it is observed that the peak in GO spectrum at 230 nm is shied to 256 nm due to the reduction GO sheet and the characteristic peak of CuO nanoparticles appeared at 375 nm. 46,47 Also, the characteristics peak of AgNPs appeared at 400 nm in the spectrum of Ag-rGO and Ag/CuO-rGO nanocomposites which conrms the presence of AgNPs on GO surface. 48 The structures and phase composition of all prepared samples were examined by using XRD measurements and the corresponding pattern is shown in Fig.…”

Section: Resultsmentioning

confidence: 95%

“… 48 For CuO-rGO and Ag/CuO-rGO nanocomposites, the diffraction peaks observed at 2 θ values of 33, 35, 38, 48.7, 53.5, 58.3, 61.7, and 67.9 correspond to (110), (111), (200), (202), (020), (021), (113), and (220) planes, respectively which are characteristic peaks of the monoclinic structure of CuO. 47 Additionally for Ag-rGO and Ag/CuO-rGO nanocomposites, the XRD shows two peaks at 2 θ = 38.3°, 44.2° correspond to the (111), (200) planes, respectively which are characteristic of the face-centered cubic structure of AgNPs. 48 Also Fig.…”

Section: Resultsmentioning

confidence: 97%

High efficiency solar desalination and dye retention of plasmonic/reduced graphene oxide based copper oxide nanocomposites

et al. 2021

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“…Because of the presence of Cu-ablated specious in the turquoise phase of the target after the laser ablation of the turquoise phase (Figures S5a and c), the absorption spectrum for this sample was intensified in the UV region. The UV absorption of Cu compounds usually was in the visible region and changed to the UV region with quantum confinement effect enhancement . In addition, UV absorption of the sample was observed because of the direct-charge transfer transition of O 2– 2p → Fe 3+ 3d of α-Fe 2 O 3 in the turquoise phase-ablated species.…”

Section: Resultsmentioning

confidence: 99%

Core–Double-Shell Fe₂O₃@SiO₂@Jarosite Hybrid Nanoparticles Synthesized by Laser Ablation of Turquoise in Ethanol

et al. 2020

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This work highlights a facile green route for the one-step synthesis of iron oxide core−double-shell nanoparticles (NPs) and aluminum phosphide (AlP) nanosheets by pulsed laser ablation of the mineral turquoise target from Nishapur in the presence of an ethanol solvent. High-resolution transmission electron microscopy, selected-area electron diffraction pattern, and field emission scanning electron microscopy (FESEM) in combination with energy-dispersive X-ray mapping revealed the formation of NPs with a typical core@double-shell structure in which crystalline α-Fe 2 O 3 (iron oxide) formed the core, while SiO 2 (quartz) and (K, H 3 O)Fe 3 (SO 4 ) 2 (OH 6 ) (jarosite) participated as the inner and outer shell, respectively. However, the application of laser ablation on the turquoise phase of the target led to the formation of AlP nanosheets which was confirmed by the X-ray diffraction patterns and FESEM images. Strong absorption of the vein-ablated species in the UV region (250−360 nm) was the characteristic feature of α-Fe 2 O 3 and jarosite phases, while the absorption band at 250− 300 nm for the turquoise-ablated species was related to the presence of Cu compound species and also the α-Fe 2 O 3 phase in the sample. Photoluminescence emission spectra for the vein-ablated species depicted a peak centered at 370 nm, while a peak located at 364 nm was ascribed to the turquoise-ablated species. In particular, these hybrid NPs with high purity and stability may offer new opportunities for bio-applications such as anticancer agents and water/wastewater applications.

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CuO nanostructures of variable shapes as an efficient catalyst for [3 + 2] cycloaddition of azides with terminal alkyne

Abstract: CuO nanowires exhibited highest catalytic efficiency for the cycloaddition reaction between azide and terminal alkyne, featuring short reaction time, soft reaction conditions and complete regioselectivity.

Cited by 19 publications

References 93 publications

pH-Responsive Hybrid Hydrogels as Antibacterial and Drug Delivery Systems

pH-Responsive Hybrid Hydrogels as Antibacterial and Drug Delivery Systems

High efficiency solar desalination and dye retention of plasmonic/reduced graphene oxide based copper oxide nanocomposites

Core–Double-Shell Fe₂O₃@SiO₂@Jarosite Hybrid Nanoparticles Synthesized by Laser Ablation of Turquoise in Ethanol

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CuO nanostructures of variable shapes as an efficient catalyst for [3 + 2] cycloaddition of azides with terminal alkyne

Abstract: CuO nanowires exhibited highest catalytic efficiency for the cycloaddition reaction between azide and terminal alkyne, featuring short reaction time, soft reaction conditions and complete regioselectivity.

Cited by 19 publications

References 93 publications

pH-Responsive Hybrid Hydrogels as Antibacterial and Drug Delivery Systems

pH-Responsive Hybrid Hydrogels as Antibacterial and Drug Delivery Systems

High efficiency solar desalination and dye retention of plasmonic/reduced graphene oxide based copper oxide nanocomposites

Core–Double-Shell Fe2O3@SiO2@Jarosite Hybrid Nanoparticles Synthesized by Laser Ablation of Turquoise in Ethanol

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Core–Double-Shell Fe₂O₃@SiO₂@Jarosite Hybrid Nanoparticles Synthesized by Laser Ablation of Turquoise in Ethanol