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Femtosecond to microsecond photochemistry of a [FeFe]hydrogenase enzyme model compound

Kaziannis, Spyridon and Santabarbara, Stefano and Wright, Joseph A. and Greetham, Gregory M. and Towrie, Michael and Parker, Anthony W. and Pickett, Christopher J. and Hunt, Neil T. (2010) Femtosecond to microsecond photochemistry of a [FeFe]hydrogenase enzyme model compound. Journal of Physical Chemistry B, 114 (46). pp. 15370-15379. ISSN 1520-6106

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Abstract

The photochemistry and dynamics of a model compound of the active site of the [FeFe]hydrogenase enzyme system have been studied on a wide range of time scales using a unique combination of femtosecond time-resolved infrared spectroscopy, nanosecond time-resolved infrared spectroscopy, and steady-state UV-FTIR methods. Using three different solvents, heptane, acetonitrile, and cyanoheptane, we have observed the rapid formation of solvent adduct species from the first solvation shell of the solute following photolysis of a carbonyl ligand and global fitting techniques have been employed to provide new insights into the ultrafast dynamics of this process. In addition, the use of solvent mixtures has enabled the observation of competitive ligand substitution processes at the newly created coordination site on time scales of a few nanoseconds, shedding new light on the chemical behavior of these enzyme models.

Item type: Article
ID code: 30220
Keywords: effective core potentials, iron-only hydrogenase, molecular calculations, infrared-spectroscopy, active-site, subsitute, spectra, systems, bonds, Physics, Chemistry, Materials Chemistry, Surfaces, Coatings and Films, Physical and Theoretical Chemistry
Subjects: Science > Physics
Science > Chemistry
Department: Faculty of Science > Physics
Related URLs:
Depositing user: Pure Administrator
Date Deposited: 11 May 2011 10:32
Last modified: 27 Mar 2014 09:18
URI: http://strathprints.strath.ac.uk/id/eprint/30220

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