New alternating electron donor-acceptor conjugated polymers entailing (E)-[4,4′-biimidazolylidene]-5,5′(1H,1′H)-dione moieties

Jianguo Wang, Xin Chen, Zhengxu Cai, Hewei Luo, Yonghai Li, Zitong Liu*, Guanxin Zhang, Deqing Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

Four new alternating D-A polymers (P1-P4) with (E)-[4,4′- biimidazolylidene]-5,5′(1H,1′H)-dione (BID) as electron accepting moieties were synthesized and characterized. Based on GPC (gel permeation chromatography) data, Mws of P1-P4 are relatively high ranging from 11.8 to 14.7 kg mol-1 with polydispersities of 1.8-1.9. Thin-films of P1-P4 show broad and strong absorptions up to 950 nm. HOMO (-5.11 eV to -5.32 eV) and LUMO (-3.71 eV to -3.81 eV) energies as well as band gaps (1.40 eV to 1.53 eV) were determined based on their onset redox potentials and absorption spectra. Field-effect transistors with thin-films of P1-P4 were successfully fabricated with conventional techniques. The results reveal that thin-films of P1 and P2 exhibit relatively high hole mobilities of up to 6.6 × 10 -3 cm2 V-1 s-1.

Original languageEnglish
Pages (from-to)5283-5290
Number of pages8
JournalPolymer Chemistry
Volume4
Issue number20
DOIs
Publication statusPublished - 21 Oct 2013
Externally publishedYes

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