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- W4256302821 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 decreases with increasing solvent polarity, suggesting a partial charge transfer nature of its low lying excited state. Time resolved luminescence measurements evidence the presence of a main emission component in the 500-520 nm spectral range, attributed to the Z isomer, and a very short living blue-shifted emission, attributed to the E isomer. Finally, transient absorption measurements performed upon far-red excitation are employed as an alternative method to determine the two-photon absorption cross-section of the molecule." @default.
- W4256302821 created "2022-05-12" @default.
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- W4256302821 date "2019-06-27" @default.
- W4256302821 modified "2023-09-29" @default.
- W4256302821 title "Ultrafast processes triggered by one- and two-photon excitation of a photochromic and luminescent hydrazone" @default.
- W4256302821 doi "https://doi.org/10.3762/bxiv.2019.48.v1" @default.
- W4256302821 hasPublicationYear "2019" @default.
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