Laser-induced linear and non-linear optical features in novel benzoxazole-based on donor-acceptor chromophores
Authors:
- T. Uchacz,
- P. Szlachcic,
- A. A. Fedorchuk,
- E. Gondek,
- A. Danel,
- B. Jarosz,
- A. M. ElNaggar,
- A. A. Albassam,
- I. V. Kityk,
- G. Lakshminarayana,
- P. Czaja,
- P. Karasiński
Abstract
The photophysical properties of donor-acceptor based benzoxazoles were investigated by means of steady-state and time-resolved fluorescence techniques. Additionally, laser stimulated second-order optical effects (preliminary second harmonic generation (SHG) were studied. The studies show that the nitro-benzoxazole derivatives decorated with different alkylo/arylo amino groups dissolved in medium polar aprotic solvents: tetrahydrofuran and butyl chloride, exhibit dual fluorescence from the locally excited state (1LE) and a highly polar charge transfer (CT) state. Ambient-temperature time-resolved fluorescence investigations prove the bimodal kinetics of the excited-state electron transfer reaction 1LE→1CT. The lack of any CT emissions in cyclohexane and highly polar acetonitrile is presumably due to an efficient inter-system crossing process or fast deactivation of a low-lying CT state. In addition, strong CT properties inspired us to check a possibility to vary the absorption of the first UV–Vis maxima under influence of the external bicolour coherent laser light and the related optical second harmonic generation (SHG). The two coherent beams of the infrared Er:glass laser at 1540 nm/770 nm formed gratings in the photopolymer solidified chromophore. The performed experiments are compared with the theoretically calculated electronic parameters within the B3LYP DFT approach. The presented data open novel type of materials, allowing to operate its transparency using external IR laser light in the near IR spectral range.
- Record ID
- CUT8d37bddcf44d41a2bf4c6a9239d89584
- Publication categories
- ;
- Author
- Journal series
- Journal of Molecular Structure, ISSN 0022-2860, e-ISSN 1872-8014
- Issue year
- 2018
- Vol
- 1173
- Pages
- 531-540
- Other elements of collation
- rys.; schem.; tab.; wykr.; Bibliografia (na s.) - 540; Bibliografia (liczba pozycji) - 43; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 1173
- Keywords in English
- laser-induced absorption, luminescent properties, nonlinear optics properties, optical materials and properties, organic chromophore, quantum chemical simulations
- DOI
- DOI:10.1016/j.molstruc.2018.07.011 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S0022286018308305 Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 20
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT8d37bddcf44d41a2bf4c6a9239d89584/
- URN
urn:pkr-prod:CUT8d37bddcf44d41a2bf4c6a9239d89584
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.