phosphonic acid

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phosphonic acid

(fɒsˈfɒnɪk)
n
(Elements & Compounds) the systematic name for phosphorous acid
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It has been reported [93] that the [pK.sub.a1]s of such ammonium-bearing phosphonic acids were below 4 while the [pK.sub.a2]s were between 6 and 7.4.
Perfluorinated phosphonic acids in Canadian surface waters and wastewater treatment plant effluent: discovery of a new class of perfluorinated acids.
The modification of metal oxides surfaces (Sn[O.sub.2], Ti[O.sub.2], or Zr[O.sub.2]) with phosphonic acids is currently attracting growing interest in different areas as self-assembled monolayers [35] and ceramic membranes [36].
Chemists from Europe and the US discuss zirconium phosphate nanoparticles and their properties; chemistry at the surface and interlayer space of layered organic-inorganic hybrid materials; phosphonates in matrices; hybrid materials based on multifunctional phosphonic acids; hybrid multifunctional materials based on phosphonates, phosphinates, and auxiliary ligands; hybrid and biohybrid materials based on layered clays; fine-tuning the functionality of inorganic surfaces using phosphonate chemistry; photofunctional polymer/layered silicate hybrids by intercalation and polymerization chemistry; rigid phosphonic acids as building blocks for crystalline hybrid materials; and drug carriers based on zirconium phosphate nanoparticles.
The given vibrational analysis is also based on our earlier investigations of [N-benzylamino(boronphenyl)methyl] [26], fluoro- and formyl [35], and phenyl [36-38] analogues of phosphonic acids.
(4) The diazomethane derivatization was also performed, when the presence of free phosphonic acids in the treated material was suspected.
coli: imipenem (carbap enems), fosfomycin (phosphonic acids) and colistin sulphate (polymyxins).
Venkataraman and Young developed a foamable fluoropolymer material consisting of a partially-crystalline melt processable perfluoropolymer and a foam nucleator based on sulfonic and phosphonic acids. This material forms a uniform foam cell size where at least 90% of the foam cells are 50 micrometers or less.
It comprises, on a weight basis, one to 30% of an acidic material selected from the group consisting of sulfonic acids, phosphonic acids, phosphoric acids and combinations thereof; together with 10-80% of an organic solvent selected from the group consisting of alcohols, ethers, ketones, aldehydes, esters and combinations thereof.
The anionic oxhydril collectors, listed under the trade name Flotinor[R], include alkyl sulphates and sulphonates as well as alkyl and aryl phosphates, phosphonic acids and a large number of special products such as aminocarboxylic acids, sulpho-succinates and sulphosuccinamates.
Also, a significant decrease in the intensity of this band was observed, which indicates the adsorption of phosphonic acids onto the magnetite surface.
Synthesis and structure-activity relationships of antibacterial phosphonopeptides incorporating (1-aminoethyl) phosphonic acid and (aminomethyl) phosphonic acid.