Low band gap-conjugated polymer derivatives

Chun Guey Wu, Chnug Wei Hsieh, Ding Chou Chen, Shinn Jen Chang, Kuo Yu Chen

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22 Scopus citations


Three new poly(4,4-dialkylcyclopentadithiophene (PDOCPT) derivatives, poly(4,4-dialkylcyclopentadithiophene-co-pyridine) (PDOCPTPy), poly(4,4-dialkylcyclopentadithiophene-co-phenanthroline) (PDOCPTPh), and poly(cyclopenta[2,1-b:3,4-b′]dithiophen-4-one) (PDOCPTCK) were prepared. They were synthesized form the Stille coupling of 2,7-bis-trimethyltin-4,4- dialkylcyclopentadithiophene with dibromopyridine and dibromophenanthroline, respectively. They are soluble in organic solvents, such as CHCl3 and Toluene. The absorption thresholds of these two polymers are 500 and 650 nm for PDOCPTPy and PDOCPTPh, respectively. The electronic absorption data suggested that the band gap energy of copolymer will fall in-between the individual homopolymers. This may give a cue on how to prepare soluble conjugated polymers with desirable band gap energy.

Original languageEnglish
Pages (from-to)618-622
Number of pages5
JournalSynthetic Metals
Issue number3
StatePublished - 15 Dec 2005


  • Polythiophene and derivatives
  • Semiconducting film
  • Transition-metal catalyzed reactions


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