Zobrazeno 1 - 10
of 96
pro vyhledávání: '"Mark R. Ondrias"'
In view of the rapid growth in both experimental and theoretical studies of multiphoton processes and multiphoton spectroscopy of atoms, ions, and molecules in chemistry, physics, biology, materials sciences, etc., it is desirable to publish an Advan
Publikováno v:
Chemical Physics. 286:353-374
Transient resonance Raman spectroscopy has been used to study vibrational dynamics in five-coordinate, high-spin Fe II octaethyl porphyrin with a 2-methyl imidazole axial ligand. Vibrational populations of the porphyrin ground electronic state were p
Publikováno v:
The Journal of Physical Chemistry B. 102:9081-9090
Radical ion pairs resulting from bimolecular electron transfer between excited singlet porphyrin donors and quinone acceptors have such short lifetimes that they are rarely observed. Here we report...
Autor:
M. C. Simpson, T. Niemczyk, D. L. Fontenot, Randy W. Larsen, S. Zhang, John A. Shelnutt, Mark R. Ondrias, S. Niu, L. Martinez, R. Falcon, B. Fan
Publikováno v:
Inorganic Chemistry. 36:3839-3846
This paper describes the synthesis and initial physical characterization of a new type of model system for the investigation of photoinitiated electron transfer (ET) in proteins and polypeptides. This system is based upon a derivative of a heme-conta
Autor:
Tione Buranda, M. C. Simpson, R. Falcon, and A. J. Pastuszyn, B. Fan, Mark R. Ondrias, L. Martinez, John A. Shelnutt
Publikováno v:
Inorganic Chemistry. 36:3847-3853
This paper describes the design, synthesis, and initial characterization of a second type of model electron transfer system based upon microperoxidase-11 (MP-11) that differs significantly from those described in the preceding article. In this system
Autor:
M. C. Simpson, Mark R. Ondrias, Christopher M. Cheatum, E. S. Peterson, D. D. Eads, J. M. Friedman, Colman Shannon
Publikováno v:
Journal of the American Chemical Society. 119:5110-5117
Transient resonance Raman spectroscopy has been used to probe the vibrational dynamics of the heme active site of deoxyhemoglobin during photoexcitation. Near UV pulses of approximately 35 ps in duration were used to both excite the sample and genera
Publikováno v:
The Journal of Physical Chemistry. 100:18868-18874
The protonation of 2,3-dimethoxy-5-methyl-1,4-benzoquinone (UQ0) has been determined to improve the quantum efficiency of charge separation between a zinc meso-tetra(4-sulfonatophenyl)porphine (MP) donor and UQ0 (UQ0H+ upon protonation) acceptor syst
Publikováno v:
Chemical Physics Letters. 215:251-256
Vibrational energy redistribution may be important in regulating the function of hemes and related macrocycles. Transient resonance Raman experiments reveal a non-Boltzman vibrational energy distribution among the heme normal modes of photoexcited do
Publikováno v:
Biochimica et Biophysica Acta (BBA) - Bioenergetics. 1144:403-410
Resonance Raman spectroscopy (RRS) has been employed to characterize cytochromes c 1 isolated from bc 1 complexes of beef heart mitochondria and Rhodopseudomonas sphaeroides . The data obtained in this study extend the physical characterization of cy
Autor:
Mark R. Ondrias, Laurie D. Sparks, Paul R. Ortiz de Montellano, John A. Shelnutt, James R. Chamberlain, Pam Hsu, Barbara A. Swanson
Publikováno v:
Inorganic Chemistry. 32:3153-3161
The reaction of certain heme-containing proteins with phenylhydrazine results in N-phenylprotoporphyrin formation. N-substituted porphyrins are known to inhibit ferrochelatase and to be formed in the inactivation of hepatic cytochrome P[sub 450] by v