Enantiomer-Selective Photolysis of Cold Gas-Phase Tryptophan in L-Serine Clusters with Linearly Polarized Light
Enantiomer-Selective Photolysis of Cold Gas-Phase Tryptophan in L-Serine Clusters with Linearly Polarized Light
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DOI：
10.1007/s11084-014-9370-9
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发表时间：
2014-04-01
影响因子：
2
通讯作者：
Hayakawa, Shigeo
中科院分区：
文献类型：
--
作者：
Fujihara, Akimasa;Maeda, Naoto;Hayakawa, Shigeo
Photostability of cold gas-phase tryptophan (Trp) enantiomers in L-serine (L-Ser) clusters at 8 K as a model for interstellar molecular clouds was examined using a tandem mass spectrometer containing a cold ion trap to investigate the hypothesis that homochirality in gas-phase Ser clusters promotes the enantiomeric enrichment of other amino acids via enantiomer-selective photolysis with linearly polarized light. In the UV excitation of heterochiral H+ (L-Ser) (3)(D-Trp), the CO2-eliminated product in the cluster was observed. In contrast, the photodissociation mass spectrum of homochiral H+(L-Ser)(3)(L-Trp) showed that photolysis of amino acids in the cluster did not occur due to the evaporation of L-Ser molecules. In the spectra of the homochiral H+(L-Ser) (L-Trp) and heterochiral H+(L-Ser) (D-Trp), the evaporation of L-Ser was the primary reaction pathway, and no difference between the L- and D-enantiomers was observed. The findings confirm that when 3 L-Ser units are present in the cluster, the photolytic decomposition of Trp is enantiomerically selective.
