Temperature dependent time resolved mid-IR photoacoustic spectroscopy of a nerve gas simulant DMMP

doi:10.1016/j.saa.2018.06.089

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	Temperature dependent time resolved mid-IR photoacoustic spectroscopy of a nerve gas simulant DMMP
	Rao, K. S.; Razdan, A. K.; Tyagi, A.; Chaudhary, A. K.
	2018
发表期刊	Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy
ISSN	1386-1425
卷号	204 页码:696-701
摘要	The paper reports the temperature dependent pulsed photoacoustic spectroscopy of Dimethyl methylphosphonate (DMMP) a nerve gas simulant between 50 and 180 degrees C temperature range. The time domain PA spectra are recorded using two mid-IR wavelengths i.e. 3374 nm, 3495 nm of pulse duration 1.5 ns at 1 kHz repetition rate obtained from optical parametric oscillator. Two anti-symmetric stretching vibrational modes of (CH3P) and (CH3O) groups of DMMP molecules have very strong vibrational peaks at 28612 cm(-1) (3495 nm) and 2963.8 cm(-1) (3374 nm), respectively. In addition, we have also recorded the PA spectra of acetone at the vibrational frequency 31152 cm-1 (3210 nm), which is the strong vibrational mode of CH band. The comparison of two PA spectra of DMMP and acetone recorded using similar PA cavity help us to understand the effect of other functional groups with respect to different excitation wavelengths. The presence of additional acoustic modes in the PA spectra of DMMP (3374 nm) above the boiling point confirms the slow process of thermal decomposition. Finally, the low level detection limit of DMMP in air is of the of the order of 0.91 ppbV. (C) 2018 Elsevier B.V. All rights reserved.
关键词	OPO DMMP Photoacoustic Laser IR-bands thermal-decomposition nitromethane stability sensor no2 photodissociation dynamics spectra nm Spectroscopy
DOI	10.1016/j.saa.2018.06.089
收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/61176
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Rao, K. S.,Razdan, A. K.,Tyagi, A.,et al. Temperature dependent time resolved mid-IR photoacoustic spectroscopy of a nerve gas simulant DMMP[J]. Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy,2018,204:696-701.
APA	Rao, K. S.,Razdan, A. K.,Tyagi, A.,&Chaudhary, A. K..(2018).Temperature dependent time resolved mid-IR photoacoustic spectroscopy of a nerve gas simulant DMMP.Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy,204,696-701.
MLA	Rao, K. S.,et al."Temperature dependent time resolved mid-IR photoacoustic spectroscopy of a nerve gas simulant DMMP".Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy 204(2018):696-701.

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