Electronic Nature of Nonlinear Optical Properties of a Symmetrical Two-Photon Absorbing Fluorene Derivative: Experimental Study and Theoretical Modeling
| Autor: | Yevgeniy O. Shaydyuk, Maria Yezabel Colon Gomez, Mykhailo V. Bondar, Anna Painelli, Eric W. Van Stryland, Cristina Sissa, Kevin D. Belfield, David J. Hagan, Siarhei Kurhuzenkau |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
010405 organic chemistry Relaxation (NMR) Solvatochromism Fluorene 010402 general chemistry 01 natural sciences Molecular physics 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound General Energy chemistry Excited state Ultrafast laser spectroscopy Stimulated emission Physical and Theoretical Chemistry Spectroscopy Absorption (electromagnetic radiation) |
| Zdroj: | The Journal of Physical Chemistry C. 122:5664-5672 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.7b12397 |
| Popis: | A comprehensive experimental and theoretical study of linear photophysical properties, such as excited-state relaxation, two-photon absorption, and stimulated emission spectra of the symmetrical fluorene derivative 2,2′-((1E,1′E)-(9,9-diethyl-9H-fluorene-2,7-diyl)bis(ethene-2,1-diyl))bis(1-methyl-1H-pyrrole) (1), is presented. The steady-state absorption, fluorescence, excitation, and excitation anisotropy spectra of 1 in organic solvents of different polarities are investigated experimentally and modeled. The fluorescence solvatochromism of 1 suggests the occurrence of symmetry breaking in the first excited state. The nature of fast relaxation processes in the excited state of 1, with the characteristic times of several picoseconds, is investigated by transient absorption femtosecond pump–probe spectroscopy. The spectral properties of 1 are satisfactorily described by an essential-state model that, accounting for electron–vibration coupling and for polar solvation, addresses spectroscopic features not on... |
| Databáze: | OpenAIRE |
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