Acta Phys. -Chim. Sin. ›› 2003, Vol. 19 ›› Issue (07): 635-640.doi: 10.3866/PKU.WHXB20030714

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The Photoelectrochemical Properties of Four Hemicyanine Derivatives on Nanocrystalline TiO2 Electrode

Yao Qiao-Hong;Shan Lu;Li Fu-You;Yin Dong-Dong;Huang Chun-Hui   

  1. State Key Laboratory of Rare Earth Material Chemistry and Applications,Peking University, Beijing 100871; 1Department of Chemistry, Beijing Normal University, Beijing 100875
  • Received:2002-12-24 Revised:2003-03-11 Published:2003-07-15
  • Contact: Li Fu-You

Abstract: Four hemicyanine derivatives, (E)-N-(4-sulfobutyl)-4-[2-(4-N, N-dimethylamino- phenyl) ethenyl] pyridinium(P1), (E)-N-(4-sulfobutyl)-4-[2-(4-N, N-dimethylaminophenyl)-1,3- butenyl]pyridinium(P2), (E)-N-(4-sulfobutyl)-4-[2-(4-N,N-dimethylaminophenyl)ethenyl] quinol- inium (Q1) and (E)-N-(4-sulfobutyl)-4- [2-(4-N,N- dimethylaminophenyl)-1,3- butenyl] quinolinium(Q2), with different conjugated bridge and acceptor groups, have been synthesized and characterized with regard to their photophysical and photoelectrochemical properties. Experiments show that with extended π-conjugation bridge, the λmax of P2 and Q2 both red shifted and their absorption spectra broadened, which is advantageous for photoelectric conversion. Photoelectric properties of the four dye sensitized TiO2 electrodes were investigated in standard two-electrode system, and the data obtained show that Q1 has the best photo-to-electron conversion among the four dyes.

Key words: Nanocrystalline TiO2 electrode, Hemicyanine dye, Photoelectric conversion