THERMOSOMENANOREACT

Nanoreactors for controlled radical polymerizations based on the thermosome from Thermoplasma acidophilum: Templating synthesis of polymer nanoparticles and in-situ regeneration of the template

Coordinatore	UNIVERSITAET BASEL    more  Organization address address: Petersplatz 1 city: BASEL postcode: 4003 contact info Titolo: Prof. Nome: Wolfgang Cognome: Meier Email: send email Telefono: -2673822 Fax: -2673875
Nazionalità Coordinatore	Switzerland [CH]
Totale costo	0 €
EC contributo	184˙203 €
Programma	FP7-PEOPLE Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	FP7-PEOPLE-IEF-2008
Funding Scheme	MC-IEF
Anno di inizio	2009
Periodo (anno-mese-giorno)	2009-03-01   -   2011-02-28

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	UNIVERSITAET BASEL  Organization address address: Petersplatz 1 city: BASEL postcode: 4003 contact info Titolo: Prof. Nome: Wolfgang Cognome: Meier Email: send email Telefono: -2673822 Fax: -2673875	CH (BASEL)	coordinator	184˙203.52

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 Obiettivo del progetto (Objective)

'Polymer nanoparticles have found applications in high performance materials and in medical applications. An attractive route to these particles is the use of templates. However, templating methods have the disadvantage that one templating entity is needed for every object that is formed. The ideal template for polymerizations would therefore be a nanoreactor that regenerates itself once the nanoparticle is formed. Nature provides us with a protein assembly that, when further modified, may fulfill this requirement. The thermosome from Thermoplasma acidophilum is a protein complex which encloses two central cavities with a void volume of 130 nm3. Each cavity is accessible via several small pores and one large pore. The large pore is gated by a build-in lid, whose opening and closing can be controlled by ATP. I propose to use the thermosome as a nanoreactor for Atom Transfer Radical Polymerization (ATRP). To this end, an appropriate catalyst will be covalently linked into the cavity of the protein complex. In the thermosome’s closed conformation, monomers, crosslinkers and initiators can enter the cavity through the small pores, and a polymer particle will form inside of the protein. The cavity of the thermosome acts as template in order to generate nanoparticles of defined size and shape. By opening the lid, the particles will then be released into the surrounding media and the nanoreactor regenerated for further reaction cycles. The objective is to run the process in a continuous way, so that the production of the nanoparticles becomes catalytic. To this end, the formation of the particles will be synchronized with the opening-and-closing cycle of the thermosome. Furthermore, the effect of the confined reaction space provided by the cavity will be exploited to achieve an enhanced control over the ATRP reaction in order to synthesize polymers of narrow molecular weight distribution with significantly less copper-based catalyst than normally needed for aqueous ATRP.'