Acta Phys. -Chim. Sin. ›› 1996, Vol. 12 ›› Issue (03): 193-195.doi: 10.3866/PKU.WHXB19960301

• Communication •     Next Articles

Study of the Ultrafast Processes of TPP,BuPc and NtBuPc

Zhong Qing-Hua,Wang Zhao-Hui,Zhu Qi-He,Kong Fan-Ao   

  1. State Key Laboratory of Molecular Reaction Dynamics Institute of Chemistry,Chinese Academy of Science,Beijing 100080
  • Received:1995-11-27 Revised:1995-12-28 Published:1996-03-15
  • Contact: Kong Fan-Ao

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Abstract:

The ultrafast processes of tetra-phenyl-porphyrin(TPP), tetra-t-butyl-phthalocyanine(BuPc) and nitro-tri-t-butyl-phthalocyanine (NtBuPc) have been investigated using the femtosecond time-resolved fluorescence depletion method. A sharp peak of the fluorescence depletion with delay time has been observed both for TPP and BuPc. An ultrafast two-photon absorption process has been proposed to explain the sharp peak observed. A long-lived fluorescence depletion has also been observed. It is causing by the stimulated-emission-pumping process produced by the intense probe laser pulse.

Key words: Two-photon absorption;Femtosecond time-resolusion, Fluorescence depletion, Tetra-phenyl-porphyrin(TPP), Tetra-t-butyl-phthalocyanine(BuPc), Nitro-tri-t-butyl-phthalocyanine(NtBuPc)