ENERGY RELAXATION MECHANISM IN NI(II), PD(II), PT(II) AND ZN(II) PORPHYRINS Academic Article uri icon

abstract

  • AbstractPicosecond absorption spectroscopy was used to determine the intramolecular energy relaxation processes occurring in Ni(II). Pd(II), Pt(II), and Zn(II) protoporphyrin IX dimethyl ester. Picosecond data on the rate of ground state repopulation and the kinetics of a transient intermediate made it possible to determine the lifetimes of the excited singlet state of Ni, Pd, and Zn porphyrins as 102ps, 193ps, and 2.60.5 ps, respectively, and<8 ps for Pt porphyrin. On the basis of these data. the nonfluorescent and nonphosphorescent property of Ni porphyrin can be interpreted in terms of internal conversion to a lower lying singlet dd level which is not the case for the strongly phosphorescent Pd and Pt porphyrins. Copyright 1979, Wiley Blackwell. All rights reserved

published proceedings

  • PHOTOCHEMISTRY AND PHOTOBIOLOGY

author list (cited authors)

  • KOBAYASHI, T., STRAUB, K. D., & RENTZEPIS, P. M.

citation count

  • 87

complete list of authors

  • KOBAYASHI, T||STRAUB, KD||RENTZEPIS, PM

publication date

  • May 1979

publisher