Kinetic modelling of the photochromism and metal complexation of a spiropyran dye: Application to the Co(II) – Spiroindoline-diphenyloxazolebenzopyran system
investigated in acetonitrile solution by nanosecond laser photolysis at roomtemperature. In degassed solution, a short-lived transient (5 μs) has been identified as the triplet state of the closed spiro form. The ratio between the singlet and triplet pathways of ring opening has been determined from oxygen quenching measurements. In the presence of Co(II), UV irradiation is needed to induce the complexation