Also found in: Medical, Wikipedia.


A univalent cation, PH4+, derived from phosphine.


(Chemistry) chem a derivative of phosphine, with the chemical formula PH4+


(fɒsˈfoʊ ni əm)

the positively charged group PH4 + .
[1865–70; phosph (orus) + -onium]
Mentioned in ?
References in periodicals archive ?
Suitable ionic groups include onium ions such as ammonium, phosphonium, or sulfonium derivatives of aliphatic, aromatic, oraryl-aliphatic amines, phosphines, and sulfides.
Phosphonium-based tetrakis dibenzoylmethane Eu(III) and Sm(III) complexes: synthesis, crystal structure and photoluminescence properties in a weakly coordinating phosphonium ionic liquid.
In previous study, the clays with the ammonium based modifier have been used extensively in PVDF nanocomposite membranes but the behavior of nanocomposite membrane with phosphonium based clay has not been studied.
Banerjee, "Applicability of Cuckoo Search Algorithm for the Prediction of Multicomponent Liquid-Liquid Equilibria for Imidazolium and Phosphonium Based Ionic Liquids," Industrial and Engineering Chemistry Research, vol.
The TBP can nucleophilically attack one of the sulfur atoms of the disulfide bond to form transient species with phosphonium and thioxides groups.
Counter to the standard practice of allowing scale to form and relying on a chelating option or dissolver for removal, the new Scaletreat FeS prevents scale formation in the first place, and the resultant damage, at considerably lower dosages than existing chemistries, such as THPS (tetrakis hydroxymethyl phosphonium sulphate) and Acrolein, said the company in a press release.
Our efforts also lead to develop phosphonium salt methodology [39,77] and other compounds summarized as follows:
The use of phosphonium reagents for the organic modification of montmorillonite for the preparation of polystyrene-organoclay and rubber nanocomposites was already reported [31, 32].
Synthesis and antimicrobial activity of modified poly(glycidyl methacrylate-co-2hydroxyethyl methacrylate) derivatives with quaternary ammonium and phosphonium salts.
Stephan's presentation was titled "From Frustrated Lewis Pairs to Electrophilic Phosphonium Cations: Metal-free Approaches to Hydrogenation Catalysis.
Cationic head groups include imidazolium, pyridinium, pyrrolidinium, morpholinium, piperidium, quinolinium, quaternary ammonium, and quaternary phosphonium moieties; anionic head groups include tetrafluoroborate (B[F.