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Recent Advances in Heterogeneous Frustrated Lewis Pair: Synthesis, Characterization, and Catalysis
Advanced Materials, EarlyView.This review provides a concise analysis of heterogeneous frustrated Lewis pair (FLP) chemistry, focusing on their synthesis, characterization, and application in small‐molecule activation. It highlights current challenges in developing solid FLP systems and explores promising advancements through emerging technologies, offering critical insights into ...
Jiasi Li +2 more
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Determination of Quaternary Ammonium Compounds
Journal of Pharmaceutical Sciences, 1961Abstract The official potassium ferricyanide assays of quaternary ammonium, preparations can be modified to include a potentiometric titration with silver nitrate instead of the suggested iodometric method for the determination of the excess ferricyanide. Sodium nitrite interferes with the ferricyanide assay methods.
John J. Hefferren, Carol L. Dietz
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2022
This chapter focuses on amines. Saturated amines are regarded as the simplest organonitrogen compound. The chapter highlights the importance of amines as they occur widely in nature and are used often as building blocks for more complex compounds and co-reagents in numerous organic reactions.
Patrick D. Bailey, Keith M. Morgan
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This chapter focuses on amines. Saturated amines are regarded as the simplest organonitrogen compound. The chapter highlights the importance of amines as they occur widely in nature and are used often as building blocks for more complex compounds and co-reagents in numerous organic reactions.
Patrick D. Bailey, Keith M. Morgan
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Unsaturated bisquaternary ammonium compounds [PDF]
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1970 1. We obtained a number of unsaturated bisquaternary ammonium compounds. 2. The preparations produced are of pharmacological interest, having curare activity.
R. Kh. Freidlina, T. A. Kost
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Inclusion of Quaternary Ammonium Compounds by Calixarenes
Journal of Inclusion Phenomena and Molecular Recognition in Chemistry, 1994In weakly polar solvents, strong association occurs between calixarene anions and tetraalkylammonium cations, with the magnitude of the observed equilibrium constants depending upon the charge on the anion, the solvent, the ring size of the calixarene and the nature of the alkyl group of the cation. Large upfield shifts of the methyl resonances of the [
Jack M. Harrowfield +2 more
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Di(phenylmercuri)ammonium compounds
Journal of the Chemical Society A: Inorganic, Physical, Theoretical, 1968Reaction of phenylmercuric acetate and phenylmercuric chloride with concentrated aqueous ammonia yields di(phenylmercuri)ammonium compounds, (PhHg)2+X–(X = OAc or Cl). The structures of these compounds and of the corresponding nitrate and sulphate have been established by infrared spectroscopy.
Glen B. Deacon, J.H.S. Green
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Quaternary ammonium compounds in the Capparaceae
Biochemical Systematics and Ecology, 1996Abstract Fifty-five species and varieties of Capparaceae distributed in 17 genera have been examined for the presence of betaines and other quaternary ammonium compounds. Prolinebetaine and/or 3-hydroxyprolinebetaine were detected in all the species examined of Crataeva, Ritchiea, Maerua, Boscia, Capparis, Cladostemon, Cadaba, Thilachium, Morisonia
Kenneth Jewers +2 more
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Diquaternary Ammonium Compounds as Transfection Agents
Bioconjugate Chemistry, 2001Diquaternary ammonium salts constitute a new class of reagent for mediating transfection of DNA in mammalian cell lines. N,N'-dioleyl-N,N,N',N'-tetramethyl-1,2-ethanediamine (TmedEce), N,N'-dioleyl-N,N,N',N'-tetramethyl-1,3-propanediamine (PropEce), N,N'-dioleyl-N,N,N',N'-tetramethyl-1,6-hexanediamine (HexEce), and their corresponding N,N'-dicetyl ...
Robert C. MacDonald +2 more
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2012
The main cause of failure of biomedical implants is bacterial infections. Despite all efforts, it will never be possible to completely free operating theaters from bacteria, as human bodies contain already 1014 bacteria. Once on a surface, bacteria start proliferating, while protecting themselves with a slime layer against the immune system and ...
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The main cause of failure of biomedical implants is bacterial infections. Despite all efforts, it will never be possible to completely free operating theaters from bacteria, as human bodies contain already 1014 bacteria. Once on a surface, bacteria start proliferating, while protecting themselves with a slime layer against the immune system and ...
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Quaternary ammonium compounds and occupational asthma
International Archives of Occupational and Environmental Health, 2000Quaternary ammonium compounds, among which benzalkonium chloride is one of the best-known, are commonly used as antiseptics, disinfectants, detergents and preservatives. They can cause occupational asthma, which however, has been rarely reported so far, despite wide use of these products. We report three such cases.
C Moreau +5 more
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