Chem. J. Chinese Universities ›› 2012, Vol. 33 ›› Issue (04): 806.doi: 10.3969/j.issn.0251-0790.2012.04.028

• Physical Chemistry • Previous Articles     Next Articles

Self-assembly of Phthalocyanine-carbon Nanotubes Dispersed in Micelle and Light Induced Long-lived Charge Separation State

SHAO Xiao-Na1, ZHANG Xian-Fu1,2   

  1. 1. Chemistry Department, Hebei Normal University of Science & Technology, Qinhuangdao 066004, China;
    2. MPC Technologies, Hamilton, ON, Canada L8S 3H4
  • Received:2011-07-20 Online:2012-04-10 Published:2012-04-10
  • Supported by:

    河北省自然科学基金(批准号: B2010001518)资助.

Abstract: To mimic the primary process in photosynthesis, tetrasulfonated zinc phthalocyanine(ZnPcS4) and single-walled carbon nanotubes(SWCNT) were assembled to noncovalent electron donor-acceptor(D-A) complex assisted by sodium dodecyl sulfate(SDS) micelle, which disaggregate both SWCNTs and phthalocyanines in aqueous solution. The D-A complex is featured by the new absorption at 707 nm and completely non fluorescence, due to the efficient intra-molecular photo induced electron transfer revealed by both steady state and time resolved fluorescence spectra. The charge separation state(CSS) was observed by laser flash photolysis and showed a long lifetime of 42 μs observable by kinetic analysis. The long-lived CSS is due to the triplet electron transfer which is made possible by the low oxidation potential of the phthalocyanine(good donor) and the low reduction potential of SWCNT(good acceptor). The result shows that SWCNT may be applied in artificial photosynthesis.

Key words: Photoinduced electron transfer, Charge separation state, Electron donor-acceptor, Sulfonated zinc phthalocyanine, Single-walled carbon nanotube(SWCNT)

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