| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Scanning the energy dissipation process of energetic materials based on excited state relaxation and vibration-vibration coupling |
| Wen-Yan Wang(王文岩)1, Ning Sui(隋宁)1, Li-Quan Zhang(张里荃)1, Ying-Hui Wang(王英惠)1, Lin Wang(王琳)1, Quan Wang(王权)1, Jiao Wang(王娇)1, Zhi-Hui Kang(康智慧)1, Yan-Qiang Yang(杨延强)3, Qiang Zhou(周强)2, Han-Zhuang Zhang(张汉壮)1 |
1 Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries(Ministry of Education), College of Physics, Jilin University, Changchun 130012, China;
2 State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China;
3 National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China |
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Abstract The energy dissipation mechanism of energetic materials (EMs) is very important for keeping safety. We choose nitrobenzene as a model of EM and employ transient absorption (TA) spectroscopy and time-resolved coherent anti-stokes Raman scattering (CARS) to clarify its energy dissipation mechanism. The TA data confirms that the excited nitrobenzene spends about 16 ps finishing the twist intramolecular charge transfer from benzene to nitro group, and dissipates its energy through the rapid vibration relaxation in the initial excited state. And then the dynamics of vibrational modes (VMs) in the ground state of nitrobenzene, which are located at 682 cm-1 (v1), 854 cm-1 (v2), 1006 cm-1 (v3), and 1023 cm-1 (v4), is scanned by CARS. It exhibits that the excess energy of nitrobenzene on the ground state would further dissipate through intramolecular vibrational redistribution based on the vibrational cooling of v1 and v2 modes, v1 and v4 modes, and v3 and v4 modes. Moreover, the vibration-vibration coupling depends not only on the energy levels of VMs, but also on the spatial position of chemical bonds relative to the VM.
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Received: 29 March 2018
Revised: 21 June 2018
Accepted manuscript online:
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PACS:
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42.65.Sf
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(Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics)
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42.65.Dr
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(Stimulated Raman scattering; CARS)
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42.65.-k
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(Nonlinear optics)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 21573094, 11274142, 11474131, 11574112, and 51502109), the National Found for Fostering Talents of Basic Science, China (Grant No. J1103202), the Science Challenging Program (Grant No. JCKY2016212A501), and China Scholarship Council (CSC) during a visit of Ning Sui (Grant No. 201706175038) to MPIA is also acknowledged. |
Corresponding Authors:
Ying-Hui Wang, Han-Zhuang Zhang
E-mail: yinghui_wang@jlu.edu.cn;zhanghz@jlu.edu.cn
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Cite this article:
Wen-Yan Wang(王文岩), Ning Sui(隋宁), Li-Quan Zhang(张里荃), Ying-Hui Wang(王英惠), Lin Wang(王琳), Quan Wang(王权), Jiao Wang(王娇), Zhi-Hui Kang(康智慧), Yan-Qiang Yang(杨延强), Qiang Zhou(周强), Han-Zhuang Zhang(张汉壮) Scanning the energy dissipation process of energetic materials based on excited state relaxation and vibration-vibration coupling 2018 Chin. Phys. B 27 104205
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