A Novel High-Density Phase and Amorphization of Nitrogen-Rich 1H-Tetrazole (CH2N4) under High Pressure

被引：8

作者：

Li, Wenbo ^{[1
]}

Huang, Xiaoli ^{[1
]}

Bao, Kuo ^{[1
]}

Zhao, Zhonglong ^{[1
]}

Huang, Yanping ^{[1
]}

Wang, Lu ^{[1
]}

Wu, Gang ^{[1
]}

Zhou, Bo ^{[1
]}

Duan, Defang ^{[1
]}

Li, Fangfei ^{[1
]}

Zhou, Qiang ^{[1
]}

Liu, Bingbing ^{[1
]}

Cui, Tian ^{[1
]}

机构：

[1] Jilin Univ, Coll Phys, State Key Lab Superhard Mat, Changchun 130012, Peoples R China

来源：

SCIENTIFIC REPORTS | 2017年 / 7卷

基金：

中国国家自然科学基金;

关键词：

PARACRYSTALLINE; POLYMERIZATION; SPECTROSCOPY; CRYSTALLINE; TRANSITIONS; CHEMISTRY; DYNAMICS; BENZENE; SALTS;

D O I：

10.1038/srep39249

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The high-pressure behaviors of nitrogen-rich 1H-tetrazole (CH2N4) have been investigated by in situ synchrotron X-ray diffraction (XRD) and Raman scattering up to 75 GPa. A first crystalline-to-crystalline phase transition is observed and identified above similar to 3 GPa with a large volume collapse (similar to 18% at 4.4 GPa) from phase I to phase II. The new phase II forms a dimer-like structure, belonging to P1 space group. Then, a crystalline-to-amorphous phase transition takes place over a large pressure range of 13.8 to 50 GPa, which is accompanied by an interphase region approaching paracrystalline state. When decompression from 75 GPa to ambient conditions, the final product keeps an irreversible amorphous state. Our ultraviolet (UV) absorption spectrum suggests the final product exhibits an increase in molecular conjugation.

引用

页数：9

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