4.6 Article

New 1,4-divinylbenzene conjugated truxene dyes possessing D-π-D structure: Synthesis, linear photophysics and two-photon absorption

Journal

JOURNAL OF LUMINESCENCE
Volume 242, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.jlumin.2021.118579

Keywords

Conjugated organic molecule; Two-photon absorption; Truxene derivatives; Fluorescent dyes; Photophysical properties

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Funding

  1. Open Research Fund of School of Chemistry and Chemical Engineering, Henan Normal University, China
  2. CNRS [UMR 6302]
  3. Universite Bourgogne Franche-Comte
  4. Conseil Regional de Bourgogne through the PARI II CDEA project [2015-9205AAQ033S04150]
  5. European Regional Development Fund (FEDER-FSE Bourgogne 2014/2020) [2016-6200FE003S00257]

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A series of molecules with different substituents were synthesized via reaction, and their photophysical properties in different solvents were investigated, showing high fluorescence quantum yields and large Stokes shifts for these compounds.
A series of four 1,4-divinylbenzene linked truxene moieties with different substituents were synthesized by Horner-Wadsworth-Emmons reaction. Their structures were characterized using NMR spectroscopy and HRMS spectrometry. The photophysical properties of these molecules in solvents of different polarity were investigated by UV-vis absorption and fluorescence spectroscopy. These results show that these compounds have strong one-photon absorption bands in the near ultraviolet region displaying relatively high fluorescence quantum yields and large Stokes' shifts. In addition, these compounds possess good solid-state fluorescence, high two-photon absorption cross-section and high thermal stability.

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