The photophysical properties of 1H-pyrazolo[3,4-b]quinoxalines derivatives and their possible optoelectronic application
Authors:
- Tomasz Uchacz,
- Katarzyna Wojtasik,
- Paweł Szlachcic,
- Ewa Gondek,
- Monika Pokladko-Kowar,
- Andrzej Danel,
- Katarzyna Stadnicka
Abstract
In the manuscript, photophysical, electrochemical and electroluminescent properties of the series of phenyl/methyl substituted 1H-pyrazolo[3,4-b]quinoxalines have been investigated. The fluorescent properties of these compounds varied significantly depending on the presence of phenyl substituent and its position in the molecule. Compared with the 1,3-dimethylpyrazoloquinoxaline (parent molecule), phenyl at the third position of pyrazole ring enhanced the fluorescence by increasing contribution of π-π* transitions, whereas 1-phenyl substituent led to the formation of polarity-dependent charge transfer state. The molecules were also tested as potential luminophores in double layer OLED devices fabricated by solution processing techniques. The investigated pyrazoloquinoxaline based OLED's emitted green light with appreciable brightness up to 2820 cd/m2.
- Record ID
- CUT3875f50a0d7246ba8a1f8b631904751f
- Publication categories
- ;
- Author
- Journal series
- Optical Materials, ISSN 0925-3467, e-ISSN 1873-1252
- Issue year
- 2018
- Vol
- 80
- Pages
- 87-97
- Other elements of collation
- rys.; schem.; tab.; wykr.; Bibliografia (na s.) - 96-97; Bibliografia (liczba pozycji) - 76; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 80
- Keywords in English
- 1H-pyrazolo[3,4-b]quinoxalines, intersystem crossing, charge transfer emission, X-ray crystal structures, solution-processable OLED
- DOI
- DOI:10.1016/j.optmat.2018.03.065 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S0925346718302027 Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 35
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT3875f50a0d7246ba8a1f8b631904751f/
- URN
urn:pkr-prod:CUT3875f50a0d7246ba8a1f8b631904751f
* 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.