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Long-Lived Electronic Coherence of Iodine in the Condensed Phase: Sharp Zero-Phonon Lines in the B↔X Absorption and Emission of I2 in Solid Xe
journal contribution
posted on 2015-12-16, 21:33 authored by Eero Hulkko, Johan Lindgren, Toni Kiljunen, Mika PetterssonOur study of B←X absorption of molecular iodine (I2) isolated in a low-temperature crystalline xenon has revealed an
exceptionally long-lived electronic coherence in condensed phase conditions.
The visible absorption spectrum shows prominent vibronic structure
in the form of zero-phonon lines (ZPLs) and phonon side bands (PSBs).
The resolved spectrum implies weak interaction of the chromophore
to the lattice degrees of freedom. The coherence extends past the
vibrational period of the excited state molecule, unlike that observed
in any condensed phase environment for I2 so far. The ZP
transitions from the relaxing B-state populations were resolved in
the hot luminescence when the 532 nm laser was used for excitation.
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phase environmentstate moleculeiodineCondensed PhaseAbsorptionexcitationZP transitionsCoherenceEmissionphonon side bandschromophorecoherenceluminescenceZPLlattice degreesabsorption spectrum532 nm laserinteractionIodineSolid XeOur studyPSBvibronic structurevibrational periodphase conditionsfreedomxenonSharpElectronic
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