Hole burning spectroscopy of tetraphenylporphyrins |
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Authors: | J Hála M Vácha J Dian F Adamec M Ambrož R Tesař |
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Institution: | (1) Department of Chemical Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Praha 2, Czechoslovakia;(2) J. Heyrovský Institute of Physical Chemistry and Electrochemistry, Czechosl. Acad. Sci., Dolejkova 3, 180 00 Prague 8, Czechoslovakia |
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Abstract: | The persistent spectral hole burning technique has been applied to free base and central metal tetraphenylporphyrins with different substituents. The upper limits of the singlet-singlet homogeneous widths determined from the observed persistent holes have been correlated with the fluorescence lifetimes at low temperatures. Hole burning kinetics and mechanisms of both free base and central metal pigments are discussed.The authors would like to thank dr. V. Král and P. Pancoska for supplying the tetraphenylporphyrins, prof. K. Vacek and I. Pelant for stimulating discussions. |
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