Abstract— It is shown that the photoreduction of tin tetraphenylporphyrin using a variety of reducing agents does not stop at the tetraphenylchlorin stage but proceeds to the isobacteriochlorin derivative. However, this latter compound can be photooxidized in the presence of oxygen to yield exclusively tin chlorin which in turn can again be photoreduced to the isobacteriochlorin. The process appears to be photoreversible at this stage. These reactions have been studied in homogeneous and micellar solutions.

No abstract

No abstract