Triggering near-infrared luminescence of vanadyl phthalocyanine by charging.
Sreekanta DebnathKarolina Anna HaupaSergei LebedkinDmitry V StrelnikovManfred M KappesPublished in: Angewandte Chemie (International ed. in English) (2022)
Probing electrofluorochromism (EFC) at the molecular level remains challenging. Here we study the strongly charge state-dependent photoluminescence of vanadyl phthalocyanine. We report vibrationally resolved absorption and laser-induced fluorescence (LIF) spectra of samples comprising both the mass-selected neutral molecule (VOPc⋅, a stable radical) and its cation produced upon electron ionization (EI) isolated in 5 K neon matrices. Ionization of the essentially non-emissive VOPc⋅ forms a high-spin diradical cation (VOPc +.. ) which shows profound photoluminescence (PL) in the NIR range. This unique phenomenon is potentially of interest for NIR-emitting electro-optic devices.
Keyphrases
- energy transfer
- photodynamic therapy
- quantum dots
- light emitting
- single molecule
- fluorescence imaging
- fluorescent probe
- ionic liquid
- density functional theory
- gas chromatography
- drug release
- optical coherence tomography
- molecular dynamics simulations
- intellectual disability
- solar cells
- mass spectrometry
- high speed
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- molecular dynamics