Title

Photophysical Properties and Ultrafast Excited-State Dynamics of a New Two-Photon Absorbing Thiopyranyl Probe

Authors

Authors

K. D. Belfield; M. V. Bondar; A. R. Morales; A. Frazer; I. A. Mikhailov;O. V. Przhonska

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

J. Phys. Chem. C

Keywords

STIMULATED-EMISSION DEPLETION; INTRAMOLECULAR CHARGE-TRANSFER; SINGLET; OXYGEN GENERATION; DENSITY-FUNCTIONAL THEORY; OPTICAL-DATA STORAGE; FLUORENE DERIVATIVES; ONE-PHOTON; ABSORPTION PROPERTIES; ENERGY-TRANSFER; SPECTROSCOPY; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, ; Multidisciplinary

Abstract

Comprehensive linear photophysical and photochemical characterization, two-photon absorption (2PA) properties, and femtosecond excited-state dynamics of a symmetrical fluorene derivative 2-(2,6-bis((E)-2-(7-(diphenylamino)-9,9-dihexyl-9H-fluoren-7-yl)vinyl)-4H-thiopyran-4-ylidene)malononitrile (1) are reported. The linear one-photon absorption (IPA), steady-state fluorescence, excitation, and excitation anisotropy spectra of 1 were investigated in organic solvents of different polarities at room temperature, exhibiting rather complex absorption and emission behavior. The relatively strong 2PA of thiopyranyl 1 was investigated by the open aperture femtosecond Z-scan technique in the main long wavelength IPA contour with maxima cross sections up to 600-700 GM. Femtosecond dynamics of the excited-state absorption (ESA) and gain processes in 1 exhibited fast complicated relaxation phenomena with a strong dependence on solvent polarity and a weak dependence on excitation wavelength. The nature of the observed transient absorption kinetics was explained based on the short-lived ESA bands of 1 and solvate relaxation phenomena. Quantum chemical calculations, based on density functional theory, were employed for additional analysis of the IPA and 2PA properties of 1.

Journal Title

Journal of Physical Chemistry C

Volume

117

Issue/Number

23

Publication Date

1-1-2013

Document Type

Article

DOI Link

http://dx.doi.org/10.1021/jp4016454

Language

English

First Page

11941

Last Page

11952

WOS Identifier

WOS:000320640500006

ISSN

1932-7447

Recommended Citation

"Photophysical Properties and Ultrafast Excited-State Dynamics of a New Two-Photon Absorbing Thiopyranyl Probe" (2013). Faculty Bibliography 2010s. 3688.
https://stars.library.ucf.edu/facultybib2010/3688