Results 41 to 50 of about 64,444 (333)
ElectrochemistryA series of quaternary ammonium salts base on quinacridone aromatic ring were synthesized using 2,9-quinacridone as the parent material, and their leveling performance were evaluated using constant-current chronoamperometry addition curves. Additionally,
Peikun ZOU +5 more
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Synthesis, characterization, and bioactivity of rosin quaternary ammonium salt derivatives [PDF]
BioResources, 2013 Two series of rosin quaternary ammonium salts (QAS) were synthesized using the same path. The structure of the target products was characterized by HPLC, MS, IR, and 1HNMR, and the bioactivity was determined by filter paper method using Trametes ...
Tao Liang +3 more
doaj
Egyptian Journal of Petroleum, 2022 Asphaltenes deposition is one of the most severe problems in the petroleum industry, imposing high costs on oil producer companies. The use of chemical dispersants reduces the risk of asphaltene deposition.
Shirin Baghersaei +3 more
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Bis-quaternary ammonium salts as phase transfer catalysts
, 1989 Lissel M, Feldman D, Nir M, Rabinovitz M. Bis-quaternary ammonium salts as phase transfer catalysts. Tetrahedron Letters. 1989;30(13):1683-1686.Bis-quaternary ammonium salts are used for the extraction of polyanions and show better extractive abilities ...
Malka Nir +7 more
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Cyclic Olefin Copolymers as Versatile Materials for Advanced Engineering Applications
Advanced Functional Materials, EarlyView.Cyclic olefin copolymers (COCs) are presented as highly versatile materials combining tunable synthesis, excellent optical properties, and mechanical robustness. Their potential spans microfluidics, bioengineering, and advanced electronics, while emerging self‐healing and sustainable solutions highlight future opportunities.
Giulia Fredi +3 more
wiley +1 more source
New quaternary ammonium salts based decontaminants [PDF]
Romanian Journal of Military Medicine, 2014 Decontamination after terrorist attacks or industrial accidents with biological and/or chemical agents („bio-chem“) must be fast and efficient, in order to reduce the number of victims and to eliminate the consequent damages.
Diana M. Popescu +5 more
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Heteroatom Chemistry, 2021 Tandem conjugate addition–alkylation reaction of various amines with α-bromo-α, β-unsaturated ketones resulted in near-quantitative conversions into the corresponding aziridines when the reaction was carried out in the presence of 10 mol% of phase ...
Alemayehu Mekonnen, Alemu Tesfaye
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Synthesis and Catalytic Activity of Bifunctional Phase-Transfer Organocatalysts Based on Camphor
Molecules, 2023 Ten novel bifunctional quaternary ammonium salt phase-transfer organocatalysts were synthesized in four steps from (+)-camphor-derived 1,3-diamines. These quaternary ammonium salts contained either (thio)urea or squaramide hydrogen bond donor groups in ...
Luka Ciber +6 more
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Spirocyclization of keto-ynesulfonamides promoted by quaternary ammonium salts
, 2019 Spirocyclization of keto-ynesulfonamides with quaternary ammonium salts was performed to access aza-spiro compounds. , Spirocyclization of keto-ynesulfonamides with quaternary ammonium salts was performed to access aza-spiro compounds.
Andna, Lucile +2 more
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Advanced Functional Materials, EarlyView.When hydrated zinc ions are deposited onto Cu substrates at practical current densities, the modified Cu enables simultaneously compact zinc growth and suppressed hydrogen evolution. This regulatory effect originates from the superior adsorption of the modified Cu interface, which enhances zincophilicity and the hydrogen desorption barrier, thereby ...
Zhe Zhu +8 more
wiley +1 more source