Research output: Contribution to journal › Article › peer-review
A series of novel V-shaped D-π-A-π-D push-pull chromophores, containing two aminoaryl electron donors (D), 1,5-thiophenylene π-conjugated spacer and a 6-cyano- or 6,7-difluoroquinoxaline electron acceptor (A), was designed, synthesized, and characterized. 6-Cyano derivatives demonstrated red shift of absorption and emission maxima compared with 6,7-difluoro counterparts. The compounds displayed positive emission solvatochromism with increasing solvent polarity. Additionally, emission behavior of all compounds in THF/water mixture and solid state was investigated. Moreover, the two-photon excited fluorescence (2 PE) spectra of carbazolyl-containing chromophores were measured. Replacement of 6,7-difluoroquinoxaline core by 6-cyanoquinoxaline increases two-photon absorption cross section (δ2PA) value by more than 10 times. 6,7-Difluoroquinoxalines demonstrated changes in emission maxima or/and intensity after mechanic stimulation. Electronic-structure calculations with the use of quantum-chemistry methods were performed to have a deeper insight into experimental data. In summary, the obtained results show multifunctional nature of V-shaped 2,3-bis(5-arylthiephen-2-yl)quinoxalines and their potential utility in diverse applications.
Original language | English |
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Article number | 110434 |
Journal | Dyes and Pigments |
Volume | 204 |
DOIs | |
State | Published - Aug 2022 |
ID: 99570866