A New Maturity Indicator of Sedimentary Organic Matter Based on Thermal Fission of Allylic Bond in Porphyrins
作者:Shinya Nomoto、Masaki Kozono、Hajime Mita、Akira Shimoyama
DOI:10.1246/cl.2001.1174
日期:2001.11
A 3-ethyl-4-methylpyrrole unit in etioporphyrin was shown to be converted to a 3,4-dimethylpyrrole unit by the action of heat, which was proved to be catalyzed by Na-montmorillonite. Time courses of the reaction could be followed by analyzing 2-ethyl-3-methyl- and 2,3-dimethylmaleimide after chromic acid oxidation of the porphyrin. The ratio of these maleimides was proposed as a new maturity indicator for sedimentary organic matter.
研究表明,在加热作用下,乙卟啉中的3-乙基-4-甲基吡咯单元会转化为3,4-二甲基吡咯单元,而这一过程被证明是由钠蒙脱石催化的。通过分析卟啉铬酸氧化后的2-乙基-3-甲基和2,3-二甲基马来酰亚胺,可以跟踪反应的时间过程。这些马来酰亚胺的比例被提议作为沉积有机物质的新成熟度指标。