Results 1 to 10 of about 121,502 (357)

Engineering graphene by oxidation: a first principles study [PDF]

open access: yesNanotechnology 21 (4), 045704-7 (2010), 2009
Graphene epoxide, with oxygen atoms lining up on pristine graphene sheets, is investigated theoretically in this Letter. Two distinct phases: metastable clamped and unzipped structures are unveiled in consistence with experiments. In the stable (unzipped) phase, epoxy group breaks underneath sp2 bond and modifies the mechanical and electronic ...
Kun Xue, Pandey D, Zhiping Xu
arxiv   +3 more sources

Exploring Sesquiterpene Lactones from Saussurea lappa: Isolation, Structural Modifications, and Herbicide Bioassay Evaluation [PDF]

open access: yesPlants
Considering the resistance of weeds to different herbicides with different mechanisms of action, the search for new, more selective compounds with low toxicity to other species in nature has been very important for the development of agriculture. Because
Elson S. Alvarenga   +4 more
doaj   +2 more sources

Substituted Epoxides by Lithiation of Terminal Epoxides [PDF]

open access: yesOrganic Letters, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Hodgson, D, Reynolds, N, Coote, S
openaire   +4 more sources

Chiral Epoxides by Desymmetrizing Deprotonation ofmeso-Epoxides [PDF]

open access: yesAngewandte Chemie, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Hodgson, D, Gras, E
openaire   +4 more sources

Oxidation of cycloalkene using supported ruthenium catalysts under solvent-free conditions [PDF]

open access: yesChemical Industry and Chemical Engineering Quarterly, 2022
The present paper employs supported ruthenium nanoparticles alongside catalytic quantities of the radical initiator, which are proven to be capable of cyclooctene oxidation with green conditions, in the absence of solvent, with air as the main oxidant ...
Alsaiari Raiedhah Abdullah
doaj   +1 more source

Computational insights into the spontaneity of epoxide formation from halohydrins and other mechanistic details of Williamson’s ether synthesis

open access: yesChemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2023
The reaction mechanism of several Williamson‟s ether syntheses have been studied using density functional theory with triple-ζ basis sets. These computations show that the synthesis of geometrically-strained epoxide from deprotonated halohydrins is due ...
Pedro J. Silva
doaj   +1 more source

Si-Imidazole-HSO4 Functionalized Magnetic Fe3O4 Nanoparticles as an Efficient and Reusable Catalyst for the Regioselective Ring Opening of Epoxides in Water [PDF]

open access: yesNanochemistry Research, 2016
An efficient and simple method for the preparation of Si-Imidazole-HSO4 functionalized magnetic Fe3O4 nanoparticles (Si-Im-HSO4 MNPs) and used as an efficient and reusable magnetic catalysts for the regioselective ring opening of epoxides under green ...
Eshagh Rezaee Nezhad   +1 more
doaj   +1 more source

Mechanical properties of graphene oxide: the impact of functional groups [PDF]

open access: yesApplied Surface Science, 525 (2020) 146554, 2020
In the current study, mechanical characteristics of graphene oxide (GO) as a promising substitute of graphene are systematically studied through molecular dynamics simulation. For this purpose, several GO samples having different concentrations of epoxide and hydroxyl functional groups are considered.
arxiv   +1 more source

Formal [3+2] Cycloaddition Reactions of Electron-Rich Aryl Epoxides with Alkenes under Lewis Acid Catalysis Affording Tetrasubstituted Tetrahydrofurans [PDF]

open access: yes, 2020
We report on the regio- and stereoselective synthesis of tetrahydrofurans by reaction between epoxides and alkenes in the presence of a Lewis acid. This is an unprecedented formal [3+2] cycloaddition reaction between an epoxide and an alkene.
Cuca-Suárez, Luís   +3 more
core   +1 more source

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