Theoretical electronic sstructure and properties of alternating fluorene-acceptor conjugated copolymers and their model compounds

Wen Chung Wu, Wen Chang Chen

研究成果: Article

23 引文 (Scopus)

摘要

The theoretical geometries and electronic properties of fluorene (F) based alternating donor-acceptor conjugated copolymers and their model compounds were studied by the density function theory (DFT) at the B3LYP level with 6-31G or 6-31G**basis set. The acceptors investigated in this study include thiazole (TZ), thiadiazole (TD), thienopyrazine (TP), thienothiadiazole (TT), thiadiazolothienopyrazine (TTP), quinoxaline (Q), benzothiadiazole (BT), pyrazinoquinoxaline (PQ), thiadiazoloquinoxaline (TQ), and benzobisthiathiadiazole (BB). The torsional angle, bridge bond length, bond length alternation, and intramolecular charge transfer were simulated and correlated with the electronic properties, i.e., HOMO, LUMO level, and band gap. The geometries of fluorene-based donor-acceptor alternating copolymers and their model compounds are significantly affected by the structure of acceptors, particularly the ring size on the backbone. The electronic properties of the polymers and their model compounds are well correlated with the acceptor strength, coplanarity of the backbone, and intramolecular charge transfer. The theoretical study suggests that the electronic properties of alternating fluorene-acceptor conjugated copolymers could be tuned by the geometries or acceptor strength. Hence, these proposed copolymers could have potential applications as light-emitting diodes (LEDs), transparent conductor, or photovoltaic devices.

原文English
頁(從 - 到)441-449
頁數9
期刊Journal of Polymer Research
13
發行號6
DOIs
出版狀態Published - 2006 十二月 1

指紋

Electronic properties
Copolymers
Bond length
Geometry
Charge transfer
Thiadiazoles
Thiazoles
Quinoxalines
Probability density function
Light emitting diodes
Polymers
Energy gap
fluorene

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

引用此文

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