印度梅加拉亚邦Um-Sohryngkew河段富铱白垩系-古近系(K-Pg)边界层天然富勒烯C60赋存状态

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Bhaskar J. Saikia , G. Parthasarathy , Binoy K. Saikia , Rashmi R. Borah
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引用次数: 0

摘要

本文首次报道了梅加拉亚邦Um-Sohryngkew河段富铱白垩系-古近系(K-Pg)边界层中富勒烯C60的存在。采用透射电镜(TEM)、拉曼光谱(Raman)、傅里叶变换红外(FT-IR)和x射线衍射(XRD)等不同的分析方法,对从印度梅加拉亚邦Um-Sohryngkew河段提取的耐酸碳质物质中甲苯不溶性高压相富勒烯C60的存在进行了表征。在FTIR光谱研究中可以看到1427、1181、574和525 cm−1的强吸收峰,表明原始富勒烯C60。拉曼光谱也通过显示原始富勒烯C60的特征峰,独立地证实了富勒烯的存在。XRD技术提供了进一步的、独立的富勒烯验证,并且XRD图证实了富勒烯的存在。富勒烯、高压富勒烯、C60无定形相和铱同时存在,为白垩纪-古近纪(K-Pg)边界灭绝事件提供了确凿的证据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Occurrence of natural fullerene C60 from the iridium-rich Cretaceous-Paleogene (K-Pg) boundary layers of the Um-Sohryngkew river section, Meghalaya, India

Occurrence of natural fullerene C60 from the iridium-rich Cretaceous-Paleogene (K-Pg) boundary layers of the Um-Sohryngkew river section, Meghalaya, India

The presence of fullerene C60 in the iridium-rich Cretaceous-Palaeogene (K-Pg) boundary layer from the Um-Sohryngkew river section of Meghalaya is reported here for the first time. Different analytical methods, including transmission electron microscopy (TEM), Raman spectroscopy, Fourier transform infrared (FT-IR), and X-ray diffraction(XRD) techniques, have been used to characterize the presence of toluene-insoluble high-pressure phase of fullerene C60 in the acid resistant carbonaceous matter extracted from the Um-Sohryngkew river section, Meghalaya, India. Strong absorption peaks at wavenumbers 1427, 1181, 574, and 525 cm−1, which are indicative of pristine fullerene C60, can be seen in the FTIR spectroscopic study. The Raman spectrum also independently confirms the presence of fullerene, by exhibiting the characteristics peaks of pristine fullerene C60. The XRD technique provides further, independent validation of fullerenes, and the XRD pattern demonstrates fullerene presence. Fullerenes, high-pressure fullerene, the amorphous phase of C60, and iridium all coexist and offer conclusive proof of impact at the Cretaceous-Palaeogene (K-Pg) boundary extinction event.

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来源期刊
Carbon Trends
Carbon Trends Materials Science-Materials Science (miscellaneous)
CiteScore
4.60
自引率
0.00%
发文量
88
审稿时长
77 days
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