Spektroskopische Untersuchungen an Naphtho[1,2‐d]thiazolen. II. Bandenanalyse der Absorptions‐ und Fluoreszenzspektren von 2‐Aryl‐naphtho[1,2‐d]thiazolen

Spectroscopic Investigations on Naphtho[1.2-d]thiazoles. II. Deconvolution of Absorption and Fluorescence Spectra of 2-Aryl-naphtho[1.2-d]thiazoles Fluorescence measurements were carried out of organic fluorescent compounds of the type of 2-aryl-naphtho[1.2-d]thiazoles (1a–k) substituted in the aryl group by different electronic donor and acceptor substituents. 2-Phenyl-naphtho[1.2-d]thiazole was used in the series of these compounds as the reference system for optical properties. A scheme of vibronic terms in ground and excited states resulting from the spectra of emission, ultraviolet absorption and excitation is given.