Organoselenium substituted poly(p-phylenenvinylene)

N. Stuhr-Hansen, E.H.A. Beckers, L. Engman, R.A.J. Janssen

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6 Citations (Scopus)


A new type of conjugated polymer, organoselenium substituted poly(p-phenyleneviny- lene) (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 fluorescence spectroscopy revealed that the bis-alkylselenenyl PPV is extensively conjugated.
Original languageEnglish
Pages (from-to)656-662
JournalHeteroatom Chemistry
Issue number7
Publication statusPublished - 2005


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