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Autoxidation is everywhere in the atmosphere

Doctoral Programme in Laser Applications in Chemistry

Conferencia: Autoxidation is everywhere in the atmosphere

Programa de doctorado que propone la actividad

  • Láseres y Aplicaciones en Química - QUIMILASER

Persona de contacto

Nombre y apellidos: José A. Fernández González

Breve descripción de la actividad

Conferencia invitada del Dr. Henrik Grum Kjaegaard.

Atmospheric gas-phase autoxidation, the repeated unimolecular reaction followed by uptake of molecular oxygen, has been recognized as a major pathway for the atmospheric oxidation of volatile organic compounds (VOCs). More recently, we have also found autoxidation to be prevalent in compounds that contain a heteroatom: O, N, S, and P. Autoxidation leads to highly oxygenated organic molecules (HOMs) with potentially many functional groups (typically OOH, OH, C=O). The increased number of functional groups and increased size facilitates increased particle uptake and increase hydrogen bond capabilities. The importance of autoxidation is illustrated for some of the most important atmospheric VOCs, like isoprene (C5H8), terpenes (C10H16), dimethyl sulfide [(CH3)2S] and trimethyl amine [(CH3)3N].

The stability of reactive molecules formed in atmospheric reactions depends on their ability to form hydrogen bonds. Unstable hydroperoxides (OOH) are frequently formed in the atmosphere. In cases with rapid autoxidation, formation of molecules with multiple hydroperoxide groups and even a hydrotrioxide group (OOOH) is possible. The surprising stability of these highly reactive molecules is facilitated by multiple hydrogen bonds.

Ponentes

Henrik Grum Kjærgaard

Department of Chemistry, University of Copenhagen, Denmark, hgk@chem.ku.dk

Education

  • Postdoctoral Fellow, Department of Chemistry, University of Guelph, Canada
  • Ph.D. Department of Physics, Odense University
  • Cand. Scient. in Physics and Chemistry, Odense University

Employment/Professional and Academic Positions

  • 2009-now: Professor of Physical Chemistry, Department of Chemistry, UCPH
  • 1997-2009: Professor, Department of Chemistry, University of Otago, New Zealand
  • 2001-15: Visiting Researcher, TokyoTech, Tokyo, Japan (JSPS), University of Colorado at Boulder, USA (CIRES), Caltech, California, USA, Department of Chemistry, Aarhus University, Denmark

Selected Professional Activities - Academic Citizenship

  • 2021-26: Member of the Editorial Advisory Board for ‘The Journal of Physical Chemistry’
  • 2021-24: Chair of the Independent Research fund Denmark – Natural Sciences Council
  • 2019-24: Member of the Independent Research fund Denmark – Natural Sciences Council (Deputy Chair 2020)

Research webpage: https://www.ki.ku.dk/Forskning/fyschem/kjaergaard-group/

Calendario

  • 9/10/2025: Visita a los laboratorios, interacción con los estudiantes.
  • 10/10/2025: Interacción con los docentes del programa
                        Interacción con los estudiantes y con el profesorado

Lugar de impartición

Sala Adela Moyúa de la Facultad de Ciencia y Tecnología. Leioa