| Abstract: | The quenching of the fluorescence of zinc tetraphenylporphin (ZnTPP) by oxidizing agents (quinones and nitro-compounds) in isopropanol) is based on a dynamic as well as on a static mechanism. Static quenching is caused by the formation of outer-sphere molecular complexes, in which the donor and the acceptor are joined by alcohol molecules. The dependence of the constant of static fluorescence quenching on the reduction potential of the oxidant is represented by a bell-shaped curve according to the classical theory of electron transfer.L. V. Pisarzhevskii Institute of Physical Chemistry, Ukrainian Academy of Sciences, Kiev. Translated from Teoretischeskaya i Éksperimental'naya Khimiya, Vol. 27, No. 6, pp. 689–695, November–December, 1991. Original article submitted February 27, 1989. |
