Linear photophysics, two-photon absorption and femtosecond transient absorption spectroscopy of styryl dye bases

Document Type

Article

Publication Date

3-1-2017

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.

Identifier

85000922961 (Scopus)

Publication Title

Journal of Luminescence

External Full Text Location

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

ISSN

00222313

First Page

360

Last Page

367

Volume

183

Grant

VC/157

Fund Ref

University of Central Florida

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