Acriflavine Is More than It Seems: Resolving Optical Properties of Multiple Isomeric Constituents at 5 K

Ion mobility spectrometry at room temperature was combined with vibrationally resolved electronic spectroscopy of mass-selected ions at 5 K to study the well-known cationic fluorophore acriflavine. One- and two-color photodepletion action spectra recorded in gas-phase (by helium tagging) as well as...

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Veröffentlicht in:The journal of physical chemistry letters 2024-07, Vol.15 (28), p.7295-7301
Hauptverfasser: Schäfer, Alexander, Debnath, Sreekanta, Tränkle, Jana, Mohr, Theresa, Kappes, Manfred M.
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Sprache:eng
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Zusammenfassung:Ion mobility spectrometry at room temperature was combined with vibrationally resolved electronic spectroscopy of mass-selected ions at 5 K to study the well-known cationic fluorophore acriflavine. One- and two-color photodepletion action spectra recorded in gas-phase (by helium tagging) as well as dispersed fluorescence spectra obtained in neon matrix (after soft-landing deposition) indicate that the primary cation mass electrosprayed from solution comprises two isomers with different optical properties. Theory at the TD-DFT level allowed full spectral assignment. The results have implications for the preparation of novel thin film photonic materials by low-energy ion beam deposition.
ISSN:1948-7185
1948-7185
DOI:10.1021/acs.jpclett.4c01517