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Related Concept Videos

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Pyruvate Oxidation

After glycolysis, the charged pyruvate molecules enter the mitochondria via active transport and undergo three enzymatic reactions. These reactions ensure that pyruvate can enter the next metabolic pathway so that energy stored in the pyruvate molecules can be harnessed by the cells.
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Photochemistry of Sodium Pyruvate Clusters.

Sarah J Madlener1, Marc Reimann1, Jessica C Hartmann1

  • 1Universität Innsbruck, Institut für Ionenphysik und Angewandte Physik, Technikerstraße 25, Innsbruck 6020, Austria.

The Journal of Physical Chemistry. A
|June 16, 2026
PubMed
Summary

This study investigated the photochemistry of sodium pyruvate salt clusters in a simulated salt environment. Pyruvate clusters fragment via C-C bond photolysis, leading to various sodium pyruvate fragments and radical anions.

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Area of Science:

  • Atmospheric Chemistry
  • Photochemistry
  • Mass Spectrometry

Background:

  • Pyruvate is present in aged sea salt aerosols.
  • The influence of salt environments on pyruvate photochemistry is not well understood.

Purpose of the Study:

  • To investigate the photochemistry of sodium pyruvate salt clusters.
  • To understand the fragmentation mechanisms of these clusters under UV/vis irradiation.

Main Methods:

  • Electrospray ionization to generate sodium pyruvate clusters.
  • Fourier-Transform Ion Cyclotron Resonance mass spectrometry (FT-ICR MS) for cluster analysis.
  • UV/vis spectroscopy and photokinetics experiments.
  • Sustained Off-Resonance Irradiation (SORI) collision-induced dissociation (CID).
  • Quantum chemical calculations for spectral assignment.

Main Results:

  • Clusters primarily fragment by losing sodium pyruvate units.
  • Photodissociation cross sections for nonstoichiometric fragmentation are significantly lower.
  • Fragmentation initiates with C-C bond photolysis of pyruvate anions.
  • Secondary fragmentation pathways observed, including radical dianion formation and CO2- stabilization.

Conclusions:

  • The salt environment influences pyruvate photochemistry.
  • Fragmentation mechanisms involve C-C bond cleavage and electron transfer.
  • Different fragmentation pathways are observed for varying cluster sizes.