Bulletin of the Korean Chemical Society

  • 제24권7호
  • /
  • Pages.961-966
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  • 2003
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  • 0253-2964(pISSN)
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  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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Molecular Design of Novel Conjugated Polymers for Blue-Light-Emitting Devices

  • Hong, Sung Y. (Department of Chemistry, Institute of Natural Science,GKosin University)
  • 발행 : 2003.07.20
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초록

A quantum-chemical study of conformations and electronic structures of polyheterocyclic derivatives with vinylenediheteroatom substituents at the 3- and 4-positions was performed to search for novel blue-lightemitting conjugated polymers. Conformational potential energy curves of the polymers were constructed as a function of the helical angle (a) through semiempirical Hartree-Fock band calculations at the Austin model 1 level. It is found that poly(3,4-vinylenedioxythiophene) possesses a quite flat curve in the range of α = 51.4°- 120°. Replacing S atoms for O atoms greatly increases repulsion between the neighboring units, and thereby the units become perpendicular to one another. Because of the hydrogen bonding between O and NH, poly(3,4- vinylenedioxypyrrole) is predicted to be anti-coplanar and poly(3,4-vinylenediaminofuran) to be nearly anticoplanar. According to the modified extended Huckel band calculations, the HOMO-LUMO gaps (HLGs) of the polymers, unless the polymer chains are twisted, are close to or slightly smaller than those of their respective mother polymers. Among the polymers, poly(3,4-vinylenedioxythiophene) is presumed to be the most probable candidate for a blue-light emitter because its HLG is within the range of the electronic requirement for blue-light emitters.

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피인용 문헌

  1. 3,4-Vinylenedioxythiophene (VDOT): a new building block for thiophene-based π-conjugated systems vol.2006, pp.3, 2003, https://doi.org/10.1039/b513923f
  2. Physical Chemistry Research Articles Published in the Bulletin of the Korean Chemical Society: 2003-2007 vol.29, pp.2, 2008, https://doi.org/10.5012/bkcs.2008.29.2.450