Ultrafast processes triggered by one- and two-photon excitation of a photochromic and luminescent hydrazone.

ABSTRACT: In this work we apply a combination of steady state and time resolved luminescence and absorption spectroscopies to investigate the excited-state dynamics of a recently developed molecular photoswitch, belonging to the hydrazone family. The outstanding properties of this molecule, involving fluorescence toggling, bistability, high isomerization quantum yield and non-negligible two-photon absorption cross section, make it very promising for numerous applications. Here we show that the light induced Z/E isomerization occurs on a fast <1 ps timescale in both toluene and acetonitrile, while the excited state lifetime of the Z-form depends on solvent polarity, suggesting a partial charge transfer nature of its low lying excited state. Time-resolved luminescence measurements eviden

SUBMITTER: Iagatti A 

PROVIDER: S-EPMC6808199 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature