Abstract
In this article, we have dealt not only with the dynamic behavior of nitrate anion in aqueous zinc nitrate solution at high temperatures and a fixed pressure but also with photoreduction of benzophenone by N, N, -diethylaniline in supercritical carbon dioxide with time-resolved absorption techniques. In the former cases the perpendicular orientational relaxation time (τ) of the anion significantly decreases with increasing temperature u p to 340°C the values of τ were 1. 86 and 0. 25 ps at 20 and 340°C, respectively. In the latter the rate constant at 40°C decreased greatly with increasing pressure from 9. 8 to 17. 2 MPa, which is considered to be due to the local aggregation of carbon dioxide around benzophenone and/or N, N, -diethylaniline.
