title: Simple one-pot syntheses of water-soluble bis(acyl)phosphane oxide photoinitiators and their application in surfactant-free emulsion polymerization.
abstract: The sodium salt of the new bis(mesitoyl)phosphinic acid (BAPO-OH) can be prepared in a very efficient one-pot synthesis. It is well soluble in water and hydrolytically stable for at least several weeks. Remarkably, it acts as an initiating agent for the surfactant-free emulsion polymerization (SFEP) of styrene to yield monodisperse, spherical nanoparticles. Time-resolved electron paramagnetic resonance (TR-EPR) and chemically induced electron polarisation (CIDEP) indicate preliminary mechanistic insights.
authors: Department of Chemistry and Applied Biosciences, ETH Zurich, CH-8093, Zurich, Switzerland.
authors: Georgina
authors: G
authors: Müller
authors: Michal
authors: M
authors: Zalibera
authors: Georg
authors: G
authors: Gescheidt
authors: Amos
authors: A
authors: Rosenthal
authors: Gustavo
authors: G
authors: Santiso-Quinones
authors: Kurt
authors: K
authors: Dietliker
authors: Hansjörg
authors: H
authors: Grützmacher
mesh_terms: D004655:Emulsions / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*; D010720:Phosphines / Q000737:chemistry*; D058105:Polymerization; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry; D013501:Surface-Active Agents / Q000737:chemistry*
chemical_list: D004655:Emulsions; D010087:Oxides; D010720:Phosphines; D011108:Polymers; D013501:Surface-Active Agents; C044646:phosphine
keywords: electron paramagnetic resonance; nanoparticles; phosphorus; photoinitiators; polymerization; radicals