The observation of a picosecond transient in the relaxation of an iron porphyrin |
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Authors: | PA Cornelius AW Steele DA Chernoff RM Hochstrasser |
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Institution: | Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA |
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Abstract: | Iron(III)tetraphenylporphyrin chloride, excited at 353 nm, showed significant bleaching and new absorption at 445 and 55 550 nm, which relaxed in 50 ps. Ground-state recovery occurs in ?100 fs; the bottleneck is populated with 3% efficiency. The photoproduct spectrum resembles a porphyrin ππ* triplet, and provides evidence for intersystem crossing in an iron heme. |
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Keywords: | Present address: The Standard Oil Co (Ohio) Cleveland Ohio 44128 USA |
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