1,3-Bis(phenylamino)squaraine – Photophysical and photochemical properties
| Autor: | Łukasz Orzeł, Janina Kabatc, Katarzyna Jurek, Katarzyna Kostrzewska, Robert Dobosz |
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| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Quenching (fluorescence) Process Chemistry and Technology General Chemical Engineering Quantum yield Infrared spectroscopy 02 engineering and technology Electron acceptor 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 0104 chemical sciences chemistry Absorption band Excited state Emission spectrum 0210 nano-technology Spectroscopy |
| Zdroj: | Dyes and Pigments. 127:179-186 |
| ISSN: | 0143-7208 |
| DOI: | 10.1016/j.dyepig.2015.12.027 |
| Popis: | A novel squarylium dye possessing donor–π–acceptor structure that features a fixed imine phenyl ring as an electron donor and 3,4-dihydroxycyclobut-3-ene-1,2-dione moiety as an electron acceptor was synthesized. The structure of the dye was elucidated by means of NMR and IR spectroscopy and elemental analysis. The compound was studied using steady-state absorption and emission spectroscopy, as well as the time-resolved spectroscopy. The measurements were carried out in solvents of different polarity. The dye absorbs in the visible light region about 400 nm and emits light with low fluorescence quantum yield, below 1 × 10 −3 M. An increases polarity of solvent results in a blue-shift of absorption band and red-shift of emission band, respectively. The rate constants of radiative and non-radiative deactivation of excited state depend on the viscosity of solvent used. The bimolecular quenching of excited singlet state of squaraine depends on the rate of diffusion process. |
| Databáze: | OpenAIRE |
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