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Maleimide index : a paleo-redox index based on fragmented fossil-chlorophylls obtained by chromic acid oxidation
| Title: | Maleimide index : a paleo-redox index based on fragmented fossil-chlorophylls obtained by chromic acid oxidation |
| Authors: | Asahina, Kenta Browse this author | | Takahashi, Satoshi Browse this author | | Saito, Ryosuke Browse this author | | Kaiho, Kunio Browse this author | | Oba, Yasuhiro Browse this author |
| Issue Date: | 31-Oct-2022 |
| Publisher: | Royal Society of Chemistry |
| Journal Title: | RSC advances |
| Volume: | 12 |
| Issue: | 48 |
| Start Page: | 31061 |
| End Page: | 31067 |
| Publisher DOI: | 10.1039/d2ra04702k |
| Abstract: | The composition of past photosynthetic organisms provides information about the paleo-environment based on the habitat characteristics of photosynthetic organisms. Therefore, analysis of chlorophyll-derived materials from photosynthetic organisms in sedimentary rocks is important for understanding paleo-environmental changes. Fossilized chlorophylls present in sedimentary rocks can be detected by their conversion into maleimides and phthalimides. This can be achieved through the chromic acid oxidation of sedimentary rocks. Since the maleimides and phthalimides are derived from the pyrrole skeleton of fossil chlorophylls, their composition reflects the composition of paleo-photosynthetic organisms. We herein propose an indicator for detecting anoxic-sulfidic conditions in the paleo oceanic photic zone, which is based on the composition ratio of the maleimides produced during the oxidation process. The maleimide index in this study would be a useful analytical method to indicate that anoxic-sulfidic conditions in the paleo oceanic photic zone, which is associated with mass extinction events, have occurred. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/87423 |
| Appears in Collections: | 低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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