Results 21 to 30 of about 12,249 (253)

Estudo da emissão por fluorescência de ultravioleta na quantificação de um inibidor de corrosão do tipo sal de amônio quaternário em água

open access: yesQuímica Nova, 2012
Quaternary ammonium salts are the corrosion inhibitors most frequently used by the oil industry. In this study, the ultraviolet fluorescence technique was evaluated for the analysis of a quaternary ammonium salt in water as a corrosion inhibitor.
Herllaine de Almeida Rangel   +1 more
doaj   +1 more source

Kinetics of Quaternary Ammonium Salts Synthesis

open access: yesProceedings of the International Conference on Applied Innovations in IT
The aim of this work is to study the synthesis of quaternary ammonium compounds based on olefins and to investigate the structure and properties of the obtained products.
Feruza Makhmudova, Oytura Maksumova
doaj   +1 more source

A Simple Halide-to-Anion Exchange Method for Heteroaromatic Salts and Ionic Liquids

open access: yesMolecules, 2012
A broad and simple method permitted halide ions in quaternary heteroaromatic and ammonium salts to be exchanged for a variety of anions using an anion exchange resin (A− form) in non-aqueous media.
Neus Mesquida   +3 more
doaj   +1 more source

Synthesis, Purification and Characterization of Polymerizable Multifunctional Quaternary Ammonium Compounds

open access: yesMolecules, 2019
Methacrylate analogs of quaternary ammonium salts functionalized with carboxylic (AMadh1 68.8% yield, AMadh2 53.2% yield) and methoxysilane (AMsil1 94.8% yield, AMsil2 36.0% yield) groups were synthesized via Menschutkin reaction.
Ugochukwu C. Okeke   +2 more
doaj   +1 more source

Catalysis by tertiary chalcogenonium salts

open access: yesTetrahedron 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
doaj   +1 more source

Synthesis of Quinacridone Derivatives and Their Application as High Performance Levelers in Electroplating

open access: yesElectrochemistry
A 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
doaj   +1 more source

Synthesis, characterization, and bioactivity of rosin quaternary ammonium salt derivatives [PDF]

open access: yesBioResources, 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  

Metal organic ionic framework based on the ionic metal complex and organic moiety as counter ion: A review

open access: yesHybrid Advances, 2022
Metal organic ionic frameworks (MOIFs) or inorgano-organic salts (IOSs) are the product of an ionic interaction between metal ionic complex and opposite organic ion in water, through ion exchange mechanism.
Rakesh Kumar Ameta
doaj   +1 more source

Magnesium‐Based Transient Bioelectronics, Bio‐Optics and Bio‐Scaffolds

open access: yesAdvanced Functional Materials, EarlyView.
This paper reviews the state of the art and recent advances in magnesium‐based thin‐film, foils, and scaffolds for applications in transient bio‐optics, bioelectronics and tissue engineering. The design principles, fabrication methods, material properties, and integration strategies are discussed in detail.
Massimo Mariello, Yves Leterrier
wiley   +1 more source

New quaternary ammonium salts based decontaminants [PDF]

open access: yesRomanian 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
doaj  

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