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Anions

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Encyclopedia of Astrobiology

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Definition

Anions are atoms or molecules that have gained an electron (e.g., CN−, OH−, C4H−). Neutral molecules with large electron affinities (EA’s) can attach an electron in a variety of chemical reactions, such as photo attachment. Long carbon-chain molecules have large EA values and C6H− was the first anion discovered in the interstellar medium in 2006.

See also

Photochemistry

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Author information

Authors and Affiliations

  1. NASA Goddard Space Flight Center, Code 699, Solar System Exploration Division, Code 691 Astrochemistry Laboratory, 20771, Greenbelt, MD, USA

    Dr. Steven Charnley

Authors
  1. Dr. Steven Charnley
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Correspondence to Steven Charnley .

Editor information

Editors and Affiliations

  1. Astrophysicist, Laboratoire d’Astrophysique de Bordeaux, BP 89, 33270, Floirac, France

    Muriel Gargaud

  2. Departamento de Planetología y Habitabilidad Centro de Astrobiología (CSIC-INTA), Universidad Autónoma de Madrid Campus Cantoblanco, Torrejón de Ardoz, 28049, Madrid, Spain

    Ricardo Amils

  3. Department of Astrophysics, Centro de Astrobiología (INTA-CSIC) Ctra de Ajalvir km 4, 28850 Torrejón de Ardoz, Madrid, Spain

    José Cernicharo Quintanilla

  4. Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Rd. NW, Washington, DC, 20015, USA

    Henderson James (Jim) Cleaves II

  5. Department of Astronomy, University of Massachusetts Lederle Graduate Research, 710 North Pleasant Street, Amherst, MA, 01003-9305, USA

    William M. Irvine

  6. GEOTOP & Départment des Sciences de la Terre et de l’Atmosphère, Université du Québec à Montréal, CP 8888, succ. Centre-Ville, Montréal, QC, H3C 3P8, Canada

    Daniele L. Pinti

  7. Astrobiology, CNES/DSP/EU, 2 place Maurice-Quentin, 75039, Paris, France

    Michel Viso

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© 2011 Springer-Verlag Berlin Heidelberg

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Charnley, S. (2011). Anions. In: Gargaud, M., et al. Encyclopedia of Astrobiology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-11274-4_80

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