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隕石中の有機化合物の起源と生成機構
奈良岡, 浩
Permalink : http://hdl.handle.net/2115/77793
JaLCDOI : 10.14943/lowtemsci.78.265
KEYWORDS : 炭素質隕石;有機分子;起源;生成機構;高分解能質量分析;Carbonaceous meteorite;Organic molecule;Origin;Formation mechanism;High-resolution mass spectrometry
Abstract
始原的な炭素質隕石中には非常に多くの有機化合物が存在する．しかし，分析の困難さから，それ ら有機化合物の同定は未だに限られている．そのため隕石有機分子の起源や生成機構はほとんどわ かっていない．本研究では炭素質隕石中に含まれる可溶性有機化合物を高分解能質量分析によって解 析し，多くのCHN組成からなるアルキル同族体を同定した．これらは簡単なアルデヒドとアンモニ アから炭素伸長反応を経て生成したと考えられる．
Soluble organic compounds in carbonaceous meteorites were studied using high-resolution mass spectrometry equipped with high-performance liquid chromatography (HPLC). More than 600 compounds consisting of CnHmN and CnHmN2 were detected in the methanol extracts of CM and CR chondrites. These alkylated N-heterocyclic homologs mayhavebeensynthesizedfromsimplealdehydes(e.g.,HCHOandCH3CHO)andammoniainmeteoriteparentbodies. The complex mixture of organic compounds detected in the meteorites may have evolved from the simple molecules observed in molecular clouds.
Soluble organic compounds in carbonaceous meteorites were studied using high-resolution mass spectrometry equipped with high-performance liquid chromatography (HPLC). More than 600 compounds consisting of CnHmN and CnHmN2 were detected in the methanol extracts of CM and CR chondrites. These alkylated N-heterocyclic homologs mayhavebeensynthesizedfromsimplealdehydes(e.g.,HCHOandCH3CHO)andammoniainmeteoriteparentbodies. The complex mixture of organic compounds detected in the meteorites may have evolved from the simple molecules observed in molecular clouds.
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