Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 36, Issue 6, Pages 553-557Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201400743
Keywords
electron paramagnetic resonance; nanoparticles; phosphorus; photoinitiators; polymerization; radicals
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Funding
- ETH Zurich
- TU Graz
- BASF Company
- Pro Bono foundation
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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.
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