Covalent symmetrization of the hexagonal networks of trimesic acids at high pressure

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• 作者：Juntao Li ; Zihe Zhao ; Pin Ren ; Chenglin Sun ; Mi Zhou ; ^{mzhou@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Raman ; Trimesic acids ; Covalent ; Symmetrization ; High pressure
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：127
• 期：13
• 页码：5396-5399
• 全文大小：536 K

文摘

The covalent symmetrization of the hexagonal networks of 1,3,5-trimesic acids under compression was studied applying inelastic Raman spectroscopic scattering in the pressure range 0–7.6 GPa. The first pressure induced phase transition, resulted from representative warping of trimesic acids network plane, was observed when compression met 0.4 GPa. Above approximately 1.9 GPa, as reflected in our Raman data, intra-plane hydrogen bonds became covalent and proton became homogeneous. Further compression beyond 7.6 GPa led to a significant loss of long-range order, marked by amorphization. Pressure-induced transformation and its mechanisms, exhibited in our experiment, reflect a characteristic structural transition of symmetric trimesic acids resulted from the effect of hydrogen-bonding interaction.