Picosecond dynamics of iron proteins

D. Huppert, K. D. Straub, P. M. Rentzepis

Research output: Contribution to journalArticlepeer-review


The excitation of hemoproteins containing either Fe2+ or Fe3+ with a picosecond light pulse resulted in the bleaching and recovery of the iron absorbance bands within 6 psec. A new absorbance band also was observed whose formation and decay rate of less than 6 psec suggests that it is probably due to S1 → S(n) absorbance. The Soret band relaxation time is deduced to be ∞0.5 psec whereas the free base hemoprotein does not show any of the above fast-decay characteristics. Therefore, there is a strong influence of the metal on the energy dissipation process.

Original languageEnglish
Pages (from-to)4139-4143
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number10
StatePublished - 1977
Externally publishedYes


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