Abstract
Absorption and luminescence spectra of ortho-, meta- and para-carboxy-5-phenyltetrazole in aqueous solutions at room and low temperature were measured. Investigations were carried out in super acidic to super basic media. Three dissociation forms were identified (anion, molecule and cation) and corresponding acid-base equilibrium constants in the ground state were determined spectrophotometrically, and in the first excited singlet state from titration curves. The latter ones for anion-molecule equilibrium are in agreement with those calculated by the Förster cycle. The formation of a twisted internal charge transfer (TICT) excited state of the anion is discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
