The distribution of chiral asymmetry in meteorites: An investigation using asymmetric autocatalytic chiral sensors
The distribution of chiral asymmetry in meteorites: An investigation using asymmetric autocatalytic chiral sensors
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DOI：
10.1016/j.gca.2006.08.006
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发表时间：
2006-11-01
影响因子：
5
通讯作者：
Pizzarello, Sandra
中科院分区：
文献类型：
--
作者：
Kawasaki, Tsuneomi;Hatase, Kunihiko;Pizzarello, Sandra
我们分离和分析了碳质球粒陨石基质的几个有机和无机相，以确定它们是否包含任何固有的不对称性。我们的目的是确定任何可能的焦点不对称除了陨石氨基酸确定的。作为探针，我们采用了一个非常敏感的不对称自催化反应。我们能够确定，不对称仍然存在于粉末萃取后，与水和溶剂，以及在不溶性有机材料（IOM）脱矿后获得。水热处理后的IOM和低温O2等离子体去除有机物后的陨石粉末中不再存在不对称性。这些数据被解释为表明一个不同的分子不对称居住在尚未未知的陨石有机物，这些有机物可能有一个诱导作用的有机分子进化后，外源性交付到早期地球。(c)2006年爱思唯尔公司All rights reserved.
We separated and analyzed several organic and inorganic phases of the carbonaccous chondrite matrix to determine whether they contained any inherent asymmetry. Our intent was to determine any possible foci of asymmetry besides the one determined for meteoritic amino acids. As a probe, we employed a very sensitive asymmetric autocatalytic reaction. We were able to determine that asymmetry still resides in powders after extraction with water and solvents as well as in the insoluble organic material (IOM) obtained after demineralization. Asymmetry is not found any longer in the IOM after hydrothermal treatment and in meteorite powders from which all organics had been removed by O-2 plasma at low temperature. The data are interpreted to indicate a diverse molecular asymmetry residing in yet unknown meteorite organics; these organics might have had an inductive effect on organic molecular evolution upon exogenous delivery to the early Earth. (c) 2006 Elsevier Inc. All rights reserved.