Solvent dependent spectroscopic properties of fingerprint reagent - 1,8-diazafluoren-9-one

Aneta Lewkowicz , Karolina Baranowska , Piotr Bojarski , Marek Józefowicz


The photophysical and photochemical properties of fingerprint reagent - 1,8-diazafluoren-9-one (DFO) - were studied using steady-state, time-resolved spectroscopic techniques and semiempirical quantum-chemical calculations. In order to understand how microenvironment influences the excited-state properties of DFO, fluorescence quantum yields, lifetimes and rate constants were determined. Spectroscopic studies and theoretical calculations indicate that the energy-level disposition of close-lying nπ* and ππ* states of DFO is significantly modified by solvent polarity. The multiple linear regression analyses proposed by Kamlet-Taft and Catalán reveal that DFO solvation is mainly determined by dipolar solute-solvent interactions, whereas the specific interactions play a less significant role. Finally, the difference in the ground and excited state dipole moments of investigated dye was obtained using solvatochromic shift methods based on the Onsager's description of general solute-solvent interactions.
Author Aneta Lewkowicz (FMPI / IEP)
Aneta Lewkowicz,,
- Institute of Experimental Physics
, Karolina Baranowska (FMPI / IEP)
Karolina Baranowska,,
- Institute of Experimental Physics
, Piotr Bojarski (FMPI / IEP)
Piotr Bojarski,,
- Institute of Experimental Physics
, Marek Józefowicz (FMPI / IEP)
Marek Józefowicz,,
- Institute of Experimental Physics
Journal seriesJournal of Molecular Liquids, ISSN 0167-7322, (N/A 100 pkt)
Issue year2019
Publication size in sheets0.55
Keywords in Englishsolute-solvent interactions, solvent effects, dipole moment, solvatochromism
ASJC Classification2505 Materials Chemistry; 1606 Physical and Theoretical Chemistry; 1607 Spectroscopy; 3104 Condensed Matter Physics; 3107 Atomic and Molecular Physics, and Optics; 2504 Electronic, Optical and Magnetic Materials
Languageen angielski
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 27-05-2020, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.275; WoS Impact Factor: 2018 = 4.561 (2) - 2018=4.136 (5)
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