Open AccessPicosecond dynamics of iron proteins
Author(s) -
D. Huppert,
K. D. Straub,
P. M. Rentzepis
Publication year - 1977
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.74.10.4139
Subject(s) - absorbance , picosecond , excitation , chemistry , photochemistry , pulse (music) , relaxation (psychology) , analytical chemistry (journal) , chemical physics , optics , physics , laser , chromatography , psychology , social psychology , quantum mechanics , detector
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 →Sn 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.