Solid state and solution fine tuning of the linear and non linear optical properties of (2-pyrene-1-yl-vinyl)pyridine by protonation/deprotonation reaction

The unexpected and acido-triggered reversible luminescence and nonlinear optical properties of (2-pyrene-1-yl-vinyl)pyridine, a simple and highly transparent chromophore, are studied both in solution and in the solid state. Remarkably, for the first time the cidomodulation of the NLO response of a poled thin film is reported.