Results 21 to 30 of about 308,670 (298)
The Mechanical Properties of Kevlar Fabric/Epoxy Composites Containing Aluminosilicates Modified with Quaternary Ammonium and Phosphonium Salts. [PDF]
Materials (Basel), 2020 We investigated the effect of modified aluminosilicates, including bentonite from Armenia (BA) modified with quaternary ammonium salts (BAQAS) and phosphonium salts (BAQPS), on the mechanical properties and morphology of Kevlar/epoxy composites.
Oliwa R.
europepmc +2 more sources
Ion-Pair-Directed Borylation of Aromatic Phosphonium Salts. [PDF]
J Org Chem, 2019 Control of positional selectivity in C–H activation reactions remains a challenge for synthetic chemists. Noncovalent catalysis has the potential to be a powerful strategy to address this challenge. As a part of our ongoing investigations into the use of
Lee B +3 more
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1-Hydroxyalkylphosphonium Salts—Synthesis and Properties
Molecules, 2023 An efficient and convenient method for the synthesis of 1-hydroxyalkylphosphonium salts is described. Reactions were carried out at room temperature, in a short time, and without chromatography for product isolation.
Jakub Adamek +6 more
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Cationic Photopolymerization by Polymeric Triphenyl Phosphonium Salts
Chemical Science International Journal, 2019 Phenacyl triphenylphosphonium and p-nitrobenzyl triphenylphosphonium polymer bound salts with SbF6- counter ions, have been synthesized and examined as polymeric photoinitiators for the cationic photopolymerization of epoxide monomers such as cyclohexene
Ideisan I. Abu-Abdoun
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Angewandte Chemie, 2023 Visible-light-induced photoreaction of carboranes is an effective approach to prepare carborane-containing compounds. While several methods via boron-centered carboranyl radicals have been established, those via carbon-centered carboranyl radicals are ...
Qiang Liu +5 more
semanticscholar +1 more source
Molecules, 2021 It has been shown for a wide range of epoxy compounds that their interaction with triphenylphosphonium triflate occurs with a high chemoselectivity and leads to the formation of (2-hydroxypropyl)triphenylphosphonium triflates 3 substituted in the 3 ...
Vladimir F. Mironov +11 more
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Activation of Cyanate Anions by Phosphine Radical Cations Enables Formal Hydrocarbamoylation of Alkenes. [PDF]
Angew Chem Int Ed EnglA photocatalytic formal hydrocarbamoylation reaction that employs a cyanate anion as the C1 source and provides N‐acyl iminophosphorane products from activated alkenes is described. Mechanistic investigations suggest generation of a phosphoranyl radical by addition of the cyanate anion to a phosphine radical cation, which enables the delivery of the ...
Vojáčková P, Studer A.
europepmc +3 more sources
Catalysis by tertiary chalcogenonium salts
Tetrahedron Chem, 2023 The synthetic utility of onium salts is widely recognized in organic chemistry. Among the wide variety of onium salt compounds, quaternary ammonium and phosphonium salts are known as representative organocatalysts.
Ken Okuno +2 more
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Facile Functionalization of Charcoal by a Green Approach
Crystals, 2023 The ability of charcoal, a low-cost material derived from biomass pyrolysis, to be functionalized via cation exchange in an aqueous solution, providing new interesting fillers with possible antimicrobial and flame-retardant properties, is discussed here.
Aida Kiani +2 more
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Catalysts, 2021 Six quaternary phosphonium salts (QPSs) in combination with phosphotungstic heteropolyacid, H3PW12O40, were tested in the epoxidation of rapeseed oil fatty acid methyl esters with a hydrogen peroxide aqueous solution.
Marlena Musik +3 more
semanticscholar +1 more source