Orthometalated N-(Benzophenoxazine)-o-aminophenol: Phenolato versus Phenoxyl States

Mondal, Sandip; Bera, Sachinath; Maity, Suvendu; Ghosh, Prasanta

doi:10.1021/acsomega.8b01983

Cited by 9 publications

(2 citation statements)

References 62 publications

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“…First, the Ag was immobilised onto the dressing via oxidation-driven polymerisation chemistry of PDA. Dopamine contains multifunctional groups of catechol and the amine rich proteins of marine mussels 24,27,28. It has been reported that DA possesses the ability to self-polymerise to form a nanometre thin coating on a wide range of substrates 18,29.…”

Section: Discussionmentioning

confidence: 99%

“…The coating of the PDA and the deposition of the Ag were modified from process used in previous studies 14,18,24. Briefly, in step 1 (Ag coating), the CG samples (10 mm in length and 10 mm in width) were pre-wetted with a 0.1 M carbonate buffer (pH = 8.5) in a petri dish and covered completely before being placed under vacuum to remove trapped air bubbles.…”

Section: Methodsmentioning

confidence: 99%

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Immobilization of Antimicrobial Silver and Antioxidant Flavonoid as a Coating for Wound Dressing Materials

Tran¹,

Ly²,

Fox³

et al. 2019

IJN

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PurposeThe aim of this study is to develop a new coating for wound dressings that is comprised of antimicrobial silver (Ag) and antioxidant flavonoid quercetin (Q).MethodsDip-coating was used to apply the coating on cotton gauge as a model dressing. Ag was immobilised using polydopamine as a priming and catalytic layer followed by coating of quercetin that was incorporated in a functionalized polydimethylsiloxane. The coating was investigated using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and release assay. The antimicrobial activity of quercetin and Ag was tested against Staphylococcus aureus (S. aureus). A surgical wound model on mice was used to evaluate the effects of the coated dressing on wound healing rates and tissue histology.ResultsAg and quercetin showed enhanced antimicrobial activity against S. aureus when used in combination. Ag and quercetin were successfully immobilized onto the fibre of the dressing using the dip-coating process. The coating released Ag and quercetin over 8 days and showed strong antioxidant activity. In the wound healing model, complete wound closure was achieved in 12 days in the group receiving coated dressing and was associated with an enhancement in tissue remodelling and neo-angiogenesis and the reduction in tissue inflammation.ConclusionThese new antimicrobial-antioxidant coatings may be promising in the development of advanced wound care therapies.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Immobilization of Antimicrobial Silver and Antioxidant Flavonoid as a Coating for Wound Dressing Materials

Tran¹,

Ly²,

Fox³

et al. 2019

IJN

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Valence Tautomerism in D‐Block Complexes

Gransbury

Boskovic

2021

Encyclopedia of Inorganic and Bioinorganic Chemistry

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The need for both improved energy efficiency of information communication technologies, and increased data storage density to meet the requirements of contemporary society, has enhanced interest in the miniaturization of electronic devices. The ultimate in miniaturization is a single molecule and the possibility of utilizing individual molecules as device components has afforded the scientific field of molecular materials. So‐called “smart” materials respond to an external stimulus and such stimuli‐response can be achieved at the molecular level. Molecular materials that can be switched between forms with different electronic structures in response to an external stimulus offer the possibility of controlled switching between species with different physical and electronic properties, including most obviously, color. The phenomenon of valence tautomerism (VT) involves stimulated intramolecular electron transfer between a redox‐active metal and ligand, sometimes accompanied by a spin transition at the metal center. While best known for cobalt–dioxolene systems, other redox‐active metal and ligand combinations can also display VT. Known since 1980, in recent times, the field of VT has expanded in a range of directions, spanning from enhancing understanding of the fundamental science and development of new examples, to incorporation of VT species into technologically relevant media, including nanoparticles, thin films, and deposition on surfaces. Particularly exciting are developments in the use of density functional theory calculations, which now allow for accurate evaluation of the likelihood and characteristics of potential VT transitions in yet‐to‐be synthesized compounds. This article presents the fundamental aspects of valence tautomerism in d‐block complexes before comprehensibly describing recent developments and possible future implications.

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Valence tautomerism and delocalization in transition metal complexes of o-amidophenolates and other redox-active ligands. Some recent results

Rajput

Sharma

Barman

et al. 2020

Coordination Chemistry Reviews

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Orthometalated N-(Benzophenoxazine)-o-aminophenol: Phenolato versus Phenoxyl States

Cited by 9 publications

References 62 publications

<p>Immobilization of Antimicrobial Silver and Antioxidant Flavonoid as a Coating for Wound Dressing Materials</p>

<p>Immobilization of Antimicrobial Silver and Antioxidant Flavonoid as a Coating for Wound Dressing Materials</p>

Valence Tautomerism in D‐Block Complexes

Valence tautomerism and delocalization in transition metal complexes of o-amidophenolates and other redox-active ligands. Some recent results

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