Pseudo-ESIPT emission from fluorophores lacking an ESIPT site: unexpected solid-state emission of alkoxylated 2,4-dibenzothiazolylphenol derivatives

Alkoxy-substituted 2,4-dibenzothiazolylphenols exhibit pseudo-ESIPT-like emission in the solid state despite the absence of a conventional ESIPT pathway, offering an unusual origin of large Stokes shifts.