Bulletin of the Korean Chemical Society

  • 제16권10호
  • /
  • Pages.972-976
  • /
  • 1995
  • /
  • 0253-2964(pISSN)
  • /
  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
권호 표지
DOI QR코드

DOI QR Code

Twisted Intramoecular Charge-Transfer Behavior of a Pre-Twisted Molecule, 4-Biphenylcarboxylate Bonded to Poly(Methyl Methacrylate)

  • 발행 : 1995.10.20
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

A trace amount of 4-biphenylcarboxylate having a pre-twisted biphenyl moiety was attached to a poly(methyl methacrylate) side chain and the fluorescence properties of the chromophore were investigated in various solvents such as ethyl acetate and butyl chloride. At room temperature, the polymer exhibited a distinct red shift of the short wavelength emission (325 nm) and an enhanced emission intensity around 430 nm upon excitation at the absorption red edge. The temperature dependence of the intensity ratio (R) of the 325 nm emission to the 430 nm emission was observed when exciting at the red edge over the temperature range between -20 and 60 ℃. However, the temperature dependence was not observed when exciting at the shorter wavelength. The Arrhenius plot of the R value shows the activation energy of 6.0 kJ/mol which is in good agreement with the energy required for the twist of the biphenyl moiety. Together with the results of red edge excitation effects it was concluded that the pre-twisted geometry of the biphenyl moiety is preserved by the restriction of the polymer chain to facilitate the formation of the twisted intramolecular charge transfer (TICT) state upon excitation.

키워드

참고문헌

  1. Chem. Phys. Letters v.160 Launay, J. P.;Sowinska, M.;Leydier, L.;Gourdon, A.;Amouyal, E.;Boillot, M. L.;Heisel, F.;Miehe, J. A.
  2. Pure Apple. Chem. v.62 Verhoeven, J. W.
  3. Photoinduced Electron Transfer (Fox, M. A.; Channon, M. eds.) v.6.2 Connolly, J. W.;Bolton, J. R.
  4. J. Phys. Chem. v.94 Khundkar, L. R.;Stiegman, A. E.;Perry, J. W.
  5. J. Phys. Chem. v.94 Lueck, H.;Windsor, M.;Rettig, W.
  6. J. Phys. Chem. v.89 Rettig, W.;Gleiter, R.
  7. Chem. Phys. v.98 Heisel, F.;Miehe, J. A.;Martino, J. M. G.
  8. J. Chem. Soc. Faraday Trans. 2 v.83 Meech, S. R;Phillips, D. J.
  9. J. Phys. Chem. v.89 Su. S.-G.;Simon, J. D.
  10. J. Phys. Chem. v.93 Su. S.-G.;Simon, J. D.
  11. Chem. Phys. Letters v.94 Nag, A.;Kundu, T.;Bhattacharyya, K.
  12. J. Chem. Phys. v.87 Simon, J. D.;Su. S.-G.
  13. Macromolecules v.20 Hayashi, r.;Tazuke, S.;Frank, C. W.
  14. Macromolecules v.21 Tazuke, S.;guo, R. K.;Hayashi, R.
  15. J. Phys. Chem. v.94 Tazuke, S.;Guo, R. K.;Ikeda, T.
  16. J. Phys. Chem. v.93 Mataga, N.;Yao, H.;Okada, T.;Rettig, W.
  17. J. Phys. Chem. v.93 Cazeau-Dubroca, C.;Lyazidi, S. A.;Cambou, P.;Peirigua, A.;Cazeau, Ph.;Pesquer, M.
  18. Bull. Korean Chem. Soc. v.13 Yoon, M.;Cho, D. W.;Lee, M. Y.;Kim, D.
  19. J. Phys. Chem. v.98 Cho, D. W.;Kim, Y. H.;Kang, S. G.;Yoon, M.;Kim, D.
  20. J. Phys. Chem. v.74 Kirby, E. P.;Steiner, R. F.
  21. Chem. Phys. Letters v.76 Al-Hassan, K. A.;El-bayoumi, M. A.
  22. Chem. Phys. Letters v.126 Al-Hassan, K. A.;Rettig, W.
  23. Acta Phys. Pol. v.A54 Grabowski, Z. R.;Rotkiewicz, K.;Rubaszeska, W.;KirkorKaminska, F.
  24. Macromolecules v.23 Tazuke, S.;Guo, R. K.