| The Unexpected Stability of Hydrazine Molecules in Hydrous Environment under Pressure |
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| 作者姓名： | 姜树清 杨雪 黄晓丽 黄艳萍 李鑫 崔田 |
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| 作者单位： | Synergetic Extreme Condition User Facility;School of Science;State Key Laboratory of Superhard Materials |
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| 基金项目： | the National Key R&D Program of China under Grant Nos.2018YFA0305900 and 2016YFB0201204;the National Natural Science Foundation of China under Grant Nos.11604342,51572108,51632002,11504127,11674122,11574112,11474127,and 11634004;the Program for Changjiang Scholars and Innovative Research Team in University under Grant No.IRT.15R23;the National Fund for Fostering Talents of Basic Science under Grant No.JI 103202. |
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| 摘 要： | The incomplete decomposition product of metastable hydrazine(N2H4)instead of the energetically favorable ammonia(NH3)upon decompression is one drawback in applications of energetic material oligomeric hydronitrogens.We explore the stability of hydrazine molecules in hydrazine hydrate(N2H4 H2O)under pressure in diamond anvil cells(DACs)combined with in situ Raman spectroscopy and synchrotron x-ray diffraction(XRD)measurements.The results show that one NH2 branch forms NH3 group by hydrogen bonds between hydrazine and water molecules after the sample crystallizes at 3.2 GPa.The strengthening hydrogen bonds cause the torsion of hydrazine molecules and further dominate a phase transition at 7.2 GPa.Surprisingly,the NN single bonds are strengthened with increasing pressure,which keeps the hydrazine molecules stable up to the ultimate pressure of 36 GPa.Furthermore,the main diffraction patterns show continuous shift to higher degrees in the whole pressure range while some weak lines disappear above 8.2 GPa.The present peak-indexing results of the diffraction patterns with Materials Studio show that the phase transition occurs in the same monoclinic crystal system.Upon decompression,all of the hydrazine molecules extract from hydrazine hydrate crystal at 2.3 GPa,which may provide a new way to purify hydrazine from hydrate.
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| 关 键 词： | HYDRAZINE BONDS CRYSTAL |
The Unexpected Stability of Hydrazine Molecules in Hydrous Environment under Pressure |
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| Shu-Qing Jian,Xue Yan,Xiao-Li Huang,Yan-Ping Huang,Xin Li,Tian Cui.The Unexpected Stability of Hydrazine Molecules in Hydrous Environment under Pressure[J].Chinese Physics Letters,2020(1):39-42. |
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| Authors: | Shu-Qing Jian Xue Yan Xiao-Li Huang Yan-Ping Huang Xin Li Tian Cui |
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| Affiliation: | (Synergetic Extreme Condition User Facility,College of Physics,Jilin University,Changchun 130012;School of Science,Changchun Institute of Technology,Changchun 130012;State Key Laboratory of Superhard Materials,College of Physics,Jilin University,Changchun 130012) |
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