Pressure-Induced Crystallization and Phase Transformation of Para-xylene
Bai, YZ; Yu, ZH; Liu, R; Li, NN; Yan, S; Yang, K; Liu, BB; Wei, DQ; Wang, L
2017
发表期刊SCIENTIFIC REPORTS
ISSN2045-2322
卷号7期号:-页码:-
文章类型期刊论文
摘要

Static pressure is an alternative method to chemical pressure for tuning the crystal structure, bonds, and physical properties of materials, and is a significant technique for the synthesis of novel materials and fundamental research. In this letter, we report the crystallization and phase transformation of p-xylene under high pressure. Our optical micrographic observations and the appearance of lattice modes in the Raman and infrared (IR) spectra indicated that p-xylene crystallizes at similar to 0.1 GPa. The X-ray diffraction (XRD) pattern at 0.84 GPa suggests that the crystallized p-xylene had a monoclinic phase with the Cc(9) space group. The sharp shrinkage of the lattice at similar to 13 GPa and the solid state of the decompressed sample we observed suggests a new crystalline phase of p-xylene. The in situ XRD showed that the new crystalline phase was still a monoclinic structure but with a different space group of C2(5), indicating that a phase transition occurred during further compression. The mass spectrometry experiment confirmed phase transition polymerization, with mainly trimer and tetramer polymers. Our findings suggest an easy and efficient method for crystallizing and polymerizing p-xylene under high pressure.

关键词Crystal-structures P-xylene Raman C-60
DOI10.1038/s41598-017-05639-9
关键词[WOS]CRYSTAL-STRUCTURES ; P-XYLENE ; RAMAN ; C-60
收录类别SCI
语种英语
WOS记录号WOS:000405386600003
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28781
专题中科院上海应用物理研究所2011-2018年
推荐引用方式
GB/T 7714
Bai, YZ,Yu, ZH,Liu, R,et al. Pressure-Induced Crystallization and Phase Transformation of Para-xylene[J]. SCIENTIFIC REPORTS,2017,7(-):-.
APA Bai, YZ.,Yu, ZH.,Liu, R.,Li, NN.,Yan, S.,...&Wang, L.(2017).Pressure-Induced Crystallization and Phase Transformation of Para-xylene.SCIENTIFIC REPORTS,7(-),-.
MLA Bai, YZ,et al."Pressure-Induced Crystallization and Phase Transformation of Para-xylene".SCIENTIFIC REPORTS 7.-(2017):-.
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