Untersuchungen am System Spiropyran + Säure ⇄ Farbsalz / Investigations on the System Spiropyran + Acid ⇄ Pyrylium Salt

Open Access
Publisher Website
Google Scholar
Abstract
We could prove that the system spiropyran/acid/pyrylium salt follows the equilibrium relation Spiropyran+acid ⇄ pyrylium salt. This color reaction can be used as an indicatory system. In this case the acid has to be produced instandaneously within the system. For this the spiropyran is mixed with a HX-donor which splits off a hydrogen halide HX by uv-irradiation. The coloration mechanism of layers consisting of spiropyran + HX-donor+matric forming polymer depends on the wavelength of the actinic radiation. Long wavelength uv-irradiation shows energy transfer, while only short wavelength uv-irradiation causes the primary process in the HX-donor

This publication has 0 references indexed in Scilit: