The present invention provides a process for the preparation of mono- and bisacylphosphanes based on formula (I): ##STR00001##
as well as for their corresponding oxides or sulfides. The present invention further relates to photoinitiators obtainable by said process.

A process for the preparation of a polymer nanoparticle by a photoinduced emulsion polymerization includes preparing an emulsion comprising at least one surfactant, a dispersed phase and a continuous phase. The dispersed phase comprises at least one polymerizable monomer and the continuous phase comprises water and at least one photoinitiator. The at least one polymerizable monomer is polymerized by exposing the emulsion to an electromagnetic radiation having a wavelength so as to induce a generation of radicals from the at least one photoinitiator. The at least one photoinitiator is selected from at least one compound of formula (I) ##STR00001##

Cyanophosphines other than P(CN).sub.3 react with lithium dicyanamide to produce lithiated carbon phosphonitrides with mobile Li.sup.+ ions.

The present invention provides a process for the preparation of mono- and bisacylphosphanes based on formula (I): ##STR00001##
as well as for their corresponding oxides or sulfides. The present invention further relates to photoinitiators obtainable by said process.

A material with the empirical formula C.sub.3N.sub.3P is made by polymerizing P(CN).sub.3 in a polar aprotic solvent such as acetonitrile, by heating, irradiation with ultraviolet light, and/or using a polymerization initiator and/or a catalyst.

Cyanophosphines other than P(CN).sub.3 react with lithium dicyanamide to produce lithiated carbon phosphonitrides with mobile Li.sup.+ ions.