Results 71 to 80 of about 24,787 (265)

Atomistic Mechanisms of Codoping-Induced p- to n-Type Conversion in Nitrogen-Doped Graphene [PDF]

open access: yesNanoscale 6, 24 (2014), 2014
It was recently shown that nitrogen-doped graphene (NG) can exhibit both p- and n-type characters depending on the C-N bonding nature, which represents a significant bottleneck for the development of graphene-based electronics. Based on first-principles calculations, we herein scrutinise the correlations between atomic and electronic structures of NG ...
arxiv   +1 more source

Amplification of Chiral Raman Scattering: A Review of Resonance Raman Optical Activity and Surface Enhanced Raman Optical Activity

open access: yesAdvanced Materials Interfaces, EarlyView.
Raman Optical Activity (ROA) uniquely probes chiral and stereochemical properties of molecules, revealing critical insights into fields like biology and material science. This review explores ROA's historical development, principles, limitations, and advancements, including resonance and surface‐enhanced methods to amplify signals.
Guojie Li   +3 more
wiley   +1 more source

The effect of zinc oxide nanoparticle morphology on activity in crosslinking of carboxylated nitrile elastomer

open access: yeseXPRESS Polymer Letters, 2009
The aim of this work was to study the activity of several nanosized zinc oxides in the crosslinking of carboxylated nitrile elastomer (XNBR). In this article, we discuss the effect of zinc oxide nanoparticles with respect to their specific surface area ...
doaj   +1 more source

Electrocyclic Ring‐Opening of 1,2,4‐Oxadiazole[4,5‐a]piridinium Chloride: a New Route to 1,2,4‐Oxadiazole Dienamino Compounds

open access: yesChemistryOpen, 2019
1,2,4‐Oxadiazole[4,5‐a]piridinium chloride adds nucleophiles to undergo electrocyclic ring opening affording 1,2,4‐oxadiazole dienamino derivatives. These pyridinium salts represent a special class of Zincke salts that are prone to rearrange when treated
Dr. Stefano Carella   +2 more
doaj   +1 more source

Turning Plastic Waste Immiscibility into an Advantage: Efficiency Improvement of PVDF‐Based Energy Harvesters Using Post‐Consumer Thermoplastics

open access: yesAdvanced Materials Interfaces, EarlyView.
Turning plastic waste immiscibility into an advantage: efficiency improvement of PVDF‐based energy harvesters using post‐consumer thermoplastics. The study highlights the synergy between thermoplastics waste and PVDF achieving remarkable voltage outputs ≈800 V surpassing traditional PVDF‐based nanogenerators. Abstract The immiscibility of plastic waste,
Petr Slobodian   +5 more
wiley   +1 more source

Synthesis and biological evaluation of (3-arylisoxazol-5-yl) methyl 6-fluoro-4-oxo-4H-chromene-2-carboxylates as antioxidant and antimicrobial agents [PDF]

open access: yesJournal of the Serbian Chemical Society, 2017
A series of novel (3-aryl-1,2-oxazol-5-yl) methyl 6-fluoro-4-oxo-4H- -chromene-2-carboxylate derivatives (C1-C12) were synthesized by Cu (I) catalyzed reaction of in situ generated nitrile oxides with prop-2-yn-1-yl 6-fluoro-4-oxo-4H-chromene-2 ...
Battula Kumaraswamy   +3 more
doaj   +1 more source

Synthetic Studies Directed Toward Streptenol D: Enantioselective Preparation of the 3,5-diacetoxy-6\u3cem\u3eE\u3c/em\u3e,8\u3cem\u3eE\u3c/em\u3e-decadiene Segment [PDF]

open access: yes, 1998
The enantioselective preparation of 2-(3′R,5′R-diacetoxy-6E,8E-decadienyl)-1,3-dioxane, (+)-13, is described. This synthesis of the skeleton of streptenol D utilizes the ability of a diene-complexed (tricarbonyl)iron unit to serve as a protecting and ...
Dasgupta, Bireshwar, Donaldson, William
core   +1 more source

Laser‐Induced Plasma Effects on Bond Breaking in High‐Density Polyethylene Pyrolysis

open access: yesAdvanced Materials Interfaces, EarlyView.
This study introduces a novel application of Laser‐Induced Breakdown Spectroscopy (LIBS) for bond breaking in high‐density polyethylene (HDPE), an area previously unexplored in laser‐plastic interactions. For the first time, a numerical model has been developed to differentiate between photon‐induced and laser field‐induced plasma, demonstrating the ...
Rao Adeel Un Nabi   +5 more
wiley   +1 more source

Towards Understanding the Synthesis and Reactivity of Alkynyl Sulfonamides [PDF]

open access: yes, 2021
This thesis discusses the importance of the sulfonamide motif both in medicinal chemistry and as a synthetic tool. Particular focus is given to the alkynyl sulfonamide, a useful alkyne that first attracted the attention of this research group when it was
Luo, Yi
core  

Double‐Sided Control of Product Type Preference in the Visible‐Light Initiated Reaction of 1,3‐Dicarbonyl Compounds with Alkenes

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
Abstract The demonstrated light‐initiated addition of radicals formed on an active methylene group to styrene derivatives exhibits a product selectivity influenced by the presence of a protic solvent. Under protic conditions, the predominant products are branched compounds with the alkene moiety attached to the methylene group.
Małgorzata Pałyga   +2 more
wiley   +1 more source

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