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Organoselenium-Substituted Poly(p-phenylenevinylene)
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Kemiska institutionen. Institutionen för biokemi och organisk kemi, Organisk kemi I. organisk kemi.
2005 (engelsk)Inngår i: Heteroatom Chemistry, Vol. 16, nr 7, s. 656-662Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A new type of conjugated polymer, organoselenium substituted poly(p-pheylenevinylene) (PPV), was synthesized from the corresponding alkylselenenyl p-xylylene dibromide via a Gilch route using potassium tert-butoxide in THF. The p-xylylene dibromide precursors were synthesized by reacting lithiated bis(methoxymethyl)benzenes with elemental selenium, followed by alkylation of the generated selenolates. As a final demasking step, the bromomethyl functions were liberated by ether cleavage using boron tribromide. Bis-alkylselenenyl PPV was obtained with an average molecular weight Mw of approximately 300,000 g/mol and with polydispersity Mw/Mn=2. Due to low solubility, monoalkylselenenyl PPV was obtained with a considerably lower average molecular weight in the proximity of 16,000 g/mol and with a polydispersity slightly larger than 3. Absorption and flourescence spectroscopy revealed that the bis-alkylselenenyl PPV is extensively conjugated.

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2005. Vol. 16, nr 7, s. 656-662
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URN: urn:nbn:se:uu:diva-76013DOI: doi:10.1002/hc.20167OAI: oai:DiVA.org:uu-76013DiVA, id: diva2:103924
Tilgjengelig fra: 2006-02-22 Laget: 2006-02-22 Sist oppdatert: 2011-01-11

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