Title

UV resonance Raman evidence for vibrationally independent protoporphyrin IX vinyl groups

Document Type

Article

Publication Date

1-1-1992

Abstract

We have examined the protoporphyrin IX (PP) peripheral vinyl C=C stretching 220-nm-excited resonance Raman cross sections, depolarization ratios, and vinyl stretching frequencies. The depolarization ratio of 0.33 observed for the bis(cyanide) complexes of both PP and a monovinylporphyrin derivative indicates that the enhancement of the vinyl vibration is likely in both cases to be dominated by a single tensor component in a manner similar to that for the C=C stretch of simpler olefins. The data suggest that the two peripheral vinyl groups are vibrationally uncoupled. © 1992 American Chemical Society.

Publication Source (Journal or Book title)

Journal of Physical Chemistry

First Page

6917

Last Page

6922

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