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Collective Energy Transfer to a Spectator Atom via Multicenter Intermolecular Coulombic Decay.

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Area of Science:

  • Physical Chemistry
  • Photochemistry
  • Materials Science

Background:

  • Efficient light-energy utilization requires mechanisms for collective energy transfer.
  • Intermolecular Coulombic decay (ICD) is a nonlocal energy relaxation process in photoexcited molecules.

Purpose of the Study:

  • To investigate ICD as a novel energy transfer mechanism.
  • To demonstrate collective energy transfer from photoexcited molecules to a non-absorbing species.

Main Methods:

  • Irradiation of a pyridine-argon gas mixture at 266 nm.
  • Measurement of argon cation formation.
  • Systematic studies of laser power and molecular density dependence.

Main Results:

  • Dominant formation of argon cations observed.
  • ICD was identified as the mediating mechanism for energy funneling.
  • Collective energy transfer from pyridine to argon leads to argon ionization.

Conclusions:

  • ICD facilitates collective energy transfer for light-energy utilization.
  • This mechanism provides a new avenue for light-harvesting design.
  • The findings may explain biomolecular resistance to photodamage.