Vibrational relaxation of carbon monoxide in model heme compounds. 6-coordinate metalloporphyrins (M = Fe, Ru, OS)
1995; Elsevier BV; Volume: 244; Issue: 3-4 Linguagem: Inglês
10.1016/0009-2614(95)00927-v
ISSN1873-4448
AutoresJeffrey R. Hill, Dana D. Dlott, M. D. Fayer, Kristen A. Peterson, Chris W. Rella, Michael M. Rosenblatt, Kenneth S. Suslick, Christopher J. Ziegler,
Tópico(s)Heme Oxygenase-1 and Carbon Monoxide
ResumoAbstract Vibrational relaxation of carbon monoxide bound to a series of metalloporphyrin complexes (M-(coproporphyrinate-I tetraisopropyl ester)(CO)(pyridine); M = Fe, Ru, Os) was measured using picosecond infrared pump-probe experiments. The vibrational relaxation rates ((1–2.5) × 10 10 s −1 ) increased with increasing mass of the metal ion. This effect is opposite that predicted by through-σ-bond models and is interpreted as arising from a through-π-bond coupling between the CO vibrational fundamental and porphyrin vibrations.
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