Linear Photophysics, Two-Photon Absorption And Femtosecond Transient Absorption Spectroscopy Of Styryl Dye Bases

Abstract

The steady-state and time-resolved linear spectral properties, two-photon absorption spectra and fast relaxation processes in the excited states of styryl base-type derivatives were investigated. The nature of linear absorption, fluorescence and excitation anisotropy spectra were analyzed in solvents of different polarity at room temperature and specific dependence of the solvatochromic behavior on the donor-acceptor strength of the terminal substituents was shown. Two-photon absorption (2PA) efficiency of styryl dye bases was determined in a broad spectral range using two-photon induced fluorescence technique, and cross-sections maxima of ~ 100 GM were found. The excited state absorption (ESA) and fast relaxation processes in the molecular structures were investigated by transient absorption femtosecond pump-probe methodology. The role of twisted intramolecular charge transfer (TICT) effect in the excited state of styryl dye base with dimethylamino substituent was shown. The experimental spectroscopic data were also verified by quantum chemical calculations at the Time Dependent Density Functional Theory level, combined with a polarizable continuum model.

Publication Date

3-1-2017

Publication Title

Journal of Luminescence

Volume

183

Number of Pages

360-367

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.jlumin.2016.11.073

Socpus ID

85000922961 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85000922961

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