{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,5]],"date-time":"2026-08-05T09:30:05Z","timestamp":1785922205756,"version":"3.56.0"},"reference-count":88,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2020,4,30]],"date-time":"2020-04-30T00:00:00Z","timestamp":1588204800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Astrobiology"],"published-print":{"date-parts":[[2020,5]]},"abstract":"<jats:p>\n                    Numerous laboratory studies of astrophysical ice analogues have shown that their exposure to ionizing radiation leads to the production of large numbers of new, more complex compounds, many of which are of astrobiological interest. We show here that the irradiation of astrophysical ice analogues containing H\n                    <jats:sub>2<\/jats:sub>\n                    O, CH\n                    <jats:sub>3<\/jats:sub>\n                    OH, CO, and NH\n                    <jats:sub>3<\/jats:sub>\n                    yields quantities of hexamethylenetetramine-methanol (hereafter HMT-methanol; C\n                    <jats:sub>7<\/jats:sub>\n                    N\n                    <jats:sub>4<\/jats:sub>\n                    H\n                    <jats:sub>14<\/jats:sub>\n                    O) that are easily detectible in the resulting organic residues. This molecule differs from simple HMT, which is known to be abundant in similar ice photolysis residues, by the replacement of a peripheral H atom with a CH\n                    <jats:sub>2<\/jats:sub>\n                    OH group. As with HMT, HMT-methanol is likely to be an amino acid precursor. HMT has tetrahedral (\n                    <jats:italic toggle=\"yes\">\n                      T\n                      <jats:sub>d<\/jats:sub>\n                    <\/jats:italic>\n                    ) symmetry, whereas HMT-methanol has\n                    <jats:italic toggle=\"yes\">\n                      C\n                      <jats:sub>1<\/jats:sub>\n                    <\/jats:italic>\n                    symmetry. We report the computed expected infrared spectra for HMT and HMT-methanol obtained using\n                    <jats:italic toggle=\"yes\">ab initio<\/jats:italic>\n                    quantum chemistry methods and show that there is a good match between the observed and computed spectra for regular HMT. Since HMT-methanol lacks the high symmetry of HMT, it produces rotational transitions that could be observed at longer wavelengths, although establishing the exact positions of these transitions may be challenging. It is likely that HMT-methanol represents an abundant member of a larger family of functionalized HMT molecules that may be present in cold astrophysical environments.\n                  <\/jats:p>","DOI":"10.1089\/ast.2019.2147","type":"journal-article","created":{"date-parts":[[2020,2,27]],"date-time":"2020-02-27T15:43:55Z","timestamp":1582818235000},"page":"601-616","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":22,"title":["The Production and Potential Detection of Hexamethylenetetramine-Methanol in Space"],"prefix":"10.1177","volume":"20","author":[{"given":"Christopher K.","family":"Materese","sequence":"first","affiliation":[{"name":"NASA Ames Research Center, MS 245-6, Moffett Field, California 94035."},{"name":"BAER Institute, NASA Research Park, MS 18-4, Moffett Field, California 94035."},{"name":"NASA Goddard Space Flight Center, Code 691, Greenbelt, Maryland 20771."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michel","family":"Nuevo","sequence":"additional","affiliation":[{"name":"NASA Ames Research Center, MS 245-6, Moffett Field, California 94035."},{"name":"BAER Institute, NASA Research Park, MS 18-4, Moffett Field, California 94035."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Scott A.","family":"Sandford","sequence":"additional","affiliation":[{"name":"NASA Ames Research Center, MS 245-6, Moffett Field, California 94035."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Partha P.","family":"Bera","sequence":"additional","affiliation":[{"name":"NASA Ames Research Center, MS 245-6, Moffett Field, California 94035."},{"name":"BAER Institute, NASA Research Park, MS 18-4, Moffett Field, California 94035."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Timothy J.","family":"Lee","sequence":"additional","affiliation":[{"name":"NASA Ames Research Center, MS 245-3, Moffett Field, California 94035."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2020,4,30]]},"reference":[{"key":"e_1_3_4_2_1","doi-asserted-by":"publisher","DOI":"10.1063\/1.4945381"},{"key":"e_1_3_4_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1945-5100.2007.tb01005.x"},{"key":"e_1_3_4_4_1","doi-asserted-by":"publisher","DOI":"10.1063\/1.3478524"},{"key":"e_1_3_4_5_1","doi-asserted-by":"publisher","DOI":"10.1063\/1.4945745"},{"key":"e_1_3_4_6_1","doi-asserted-by":"publisher","DOI":"10.1089\/ast.2016.1614"},{"key":"e_1_3_4_7_1","doi-asserted-by":"publisher","DOI":"10.1021\/j100098a014"},{"key":"e_1_3_4_8_1","doi-asserted-by":"publisher","DOI":"10.1086\/176485"},{"key":"e_1_3_4_9_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.283.5405.1135"},{"key":"e_1_3_4_10_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1945-5100.2001.tb01878.x"},{"key":"e_1_3_4_11_1","doi-asserted-by":"publisher","DOI":"10.1038\/416401a"},{"key":"e_1_3_4_12_1","doi-asserted-by":"publisher","DOI":"10.1086\/341863"},{"key":"e_1_3_4_13_1","doi-asserted-by":"publisher","DOI":"10.1086\/345941"},{"key":"e_1_3_4_14_1","doi-asserted-by":"publisher","DOI":"10.1146\/annurev-astro-082214-122348"},{"key":"e_1_3_4_15_1","doi-asserted-by":"publisher","DOI":"10.1086\/317294"},{"key":"e_1_3_4_16_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF01810858"},{"key":"e_1_3_4_17_1","doi-asserted-by":"publisher","DOI":"10.1086\/307237"},{"key":"e_1_3_4_18_1","doi-asserted-by":"publisher","DOI":"10.1088\/0004-637X\/781\/1\/15"},{"key":"e_1_3_4_19_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.21.1701"},{"key":"e_1_3_4_20_1","doi-asserted-by":"publisher","DOI":"10.1086\/309047"},{"key":"e_1_3_4_21_1","doi-asserted-by":"publisher","DOI":"10.1086\/324575"},{"key":"e_1_3_4_22_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0273-1177(02)00508-2"},{"key":"e_1_3_4_23_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11214-005-8059-9"},{"key":"e_1_3_4_24_1","doi-asserted-by":"publisher","DOI":"10.1089\/ast.2011.0677"},{"key":"e_1_3_4_25_1","first-page":"L365","article-title":"ISO-SWS observations of solid state features towards RAFGL 7009S","volume":"315","author":"d'Hendecourt L.","year":"1996","unstructured":"d'Hendecourt L., , Jourdain de Muizon M., , Dartois E., , Breitfellner M., , Ehrenfreund P., , Benit J., , Boulanger F., , Puget J.L., , and Habing H.J. 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