Spectroscopic and theoretical studies of fluorescence effects induced by the ESIPT process in a new derivative 2-Hydroxy-N-(2-phenylethyl)benzamide - Study on the effects of pH and medium polarity changes.
- Agnieszka Niemczynowicz
- Iwona Budziak
- Sławomir Kulesza
- Andrzej Górecki
- Marcin Makowski
- Dariusz Karcz
- Karolina Starzak
- Bożena Gładyszewska
- Janusz Podleśny
- Agnieszka I Piotrowicz-Cieślak
- Arkadiusz Matwijczuk
DOIAbstract
The paper presents the results of studies conducted with the use of stationary and time-resolved fluorescence spectroscopy for the new derivative 2-Hydroxy-N-(2-phenylethyl)benzamide (SAL-3) in aqueous solutions with various concentrations of hydrogen ions as well as in solvent mixtures (i.e. media with changing polarity/polarizability). For the compound selected for the study placed in aqueous solutions with varying concentrations of hydrogen ions, the fluorescence emission spectra revealed a single emission band within most of the pH range, however, at low pH (pH<3) a significant broadening (noticeable effect of dual fluorescence) and shifting of the band was observed. Whereas, for water and polar (protic) solvents, we observed a very int...
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