CAS OpenIR  > 中科院上海应用物理研究所2011-2020年
Effect of pressure on heterocyclic compounds: Pyrimidine and s-triazine
Li, SR; Li, Q; Xiong, L; Li, XD; Li, WB; Cui, W; Liu, R; Liu, J; Yang, K; Liu, BB; Zou, B;
AbstractWe have examined the high-pressure behaviors of six-membered heterocyclic compounds of pyrimidine and s-triazine up to 26 and 26.5 GPa, respectively. Pyrimidine crystallizes in Pna2(1) symmetry (phase I) with the freezing pressure of 0.3 GPa, and transforms to another phase (phase II) at 1.1 GPa. Raman spectra of several compression-decompression cycles demonstrate there is a critical pressure of 15.5 GPa for pyrimidine. Pyrimidine returns back to its original liquid state as long as the highest pressure is below 15.1 GPa. Rupture of the aromatic ring is observed once pressure exceeds 15.5 GPa during a compression-decompression cycle, evidenced by the amorphous characteristics of the recovered sample. As for s-triazine, the phase transition from R-3c to C2/c is well reproduced at 0.6 GPa, in comparison with previous Raman data. Detailed Raman scattering experiments corroborate the critical pressure for s-triazine may locate at 14.5 GPa. That is, the compression is reversible below 14.3 GPa, whereas chemical reaction with ring opening is detected when the final pressure is above 14.5 GPa. During compression, the complete amorphization pressure for pyrimidine and s-triazine is identified as 22.4 and 15.2 GPa, respectively, based on disappearance of Raman lattice modes. Synchrotron X-ray diffraction patterns and Fourier transform infrared spectra of recovered samples indicate the products in two cases comprise of extended nitrogen-rich amorphous hydrogenated carbon (a-C:H:N). (C) 2014 AIP Publishing LLC.
KeywordPhase-transformations Chemical-reactions Hydrogen-bonds Polymerization Crystal Benzene Amorphization Transition Reactivity Acetylene
Indexed BySCI
WOS IDWOS:000342843200033
Citation statistics
Document Type期刊论文
Recommended Citation
GB/T 7714
Li, SR,Li, Q,Xiong, L,et al. Effect of pressure on heterocyclic compounds: Pyrimidine and s-triazine[J]. JOURNAL OF CHEMICAL PHYSICS,2014,141(11).
APA Li, SR.,Li, Q.,Xiong, L.,Li, XD.,Li, WB.,...& of pressure on heterocyclic compounds: Pyrimidine and s-triazine.JOURNAL OF CHEMICAL PHYSICS,141(11).
MLA Li, SR,et al."Effect of pressure on heterocyclic compounds: Pyrimidine and s-triazine".JOURNAL OF CHEMICAL PHYSICS 141.11(2014).
Files in This Item: Download All
File Name/Size DocType Version Access License
Effect of pressure o(1775KB) 开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li, SR]'s Articles
[Li, Q]'s Articles
[Xiong, L]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li, SR]'s Articles
[Li, Q]'s Articles
[Xiong, L]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li, SR]'s Articles
[Li, Q]'s Articles
[Xiong, L]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Effect of pressure on heterocyclic compounds. Pyrimidine and s-triazine.pdf
Format: Adobe PDF
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.