星际尘埃中的光化学反应——CO、NH₃和H₂O的光解

Photochemical reactions in interstellar grains photolysis of CO, NH3, and H2O.

作者信息

Agarwal V K, Schutte W, Greenberg J M, Ferris J P, Briggs R, Connor S, Van de Bult C P, Baas F

机构信息

Department of Chemistry, Rensselaer Polytechnic Institute, Troy, NY 12180-3590, USA.

出版信息

Orig Life Evol Biosph. 1985;16:21-40. doi: 10.1007/BF01808047.

DOI:10.1007/BF01808047

PMID:11542015

Abstract

A simulation of the organic layer accreted onto interstellar dust particles was prepared by slow deposition of a CO:NH2:H2O gas mixture on an Al block at 10 K, with concomitant irradiation with vacuum UV. The residues were analyzed by GC-MS, HPLC, and near IR; a reaction pathway leading from NH3 to complex alcohol, fatty acid, and amide products in 27 stages is postulated. The astronomical relevance and significance of the observations are discussed.

摘要

通过在10K下将CO:NH₂:H₂O气体混合物缓慢沉积在铝块上，并同时用真空紫外线照射，制备了附着在星际尘埃颗粒上的有机层模拟物。通过气相色谱 - 质谱联用仪（GC-MS）、高效液相色谱（HPLC）和近红外光谱对残留物进行了分析；推测了一个从氨开始经过27个阶段生成复杂醇、脂肪酸和酰胺产物的反应途径。讨论了这些观测结果的天文学相关性和意义。