Gaseous P-molecules are rare, with speciation information scarce. We start by enumerating phosphorus-bearing molecules (P-molecules) that could potentially be detected spectroscopically in planetary atmospheres and collecting all available spectral data. To follow up this discovery and related future exoplanet biosignature detections, it is important to spectroscopically detect the presence of phosphorus-bearing atmospheric molecules that could be involved in the chemical networks producing, destroying or reacting with phosphine. Phosphine is now well-established as a biosignature, which has risen to prominence with its recent tentative detection on Venus. 10Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States.9Commonwealth Scientific and Industrial Research Organisation Astronomy and Space Science, Bentley, WA, Australia.8School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, Australia.7Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, Australia. 6Complex Adaptive Systems Lab, Data Science Institute, University of Technology Sydney, Sydney, NSW, Australia.5Department of Physics, Aberystwyth University, Aberystwyth, United Kingdom.4Australian Centre for Astrobiology, University of New South Wales, Sydney, NSW, Australia.3School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia.2School of Chemistry, University of Sydney, Sydney, NSW, Australia.1School of Chemistry, University of New South Wales, Sydney, NSW, Australia.Lempriere 1 Chris Medcraft 1 Jensen O'Sullivan 1 Evan G. Jacob 1 Panayioti Kapodistrias 1 David J. Zapata Trujillo 1 Anna-Maree Syme 1 Keiran N.
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