Experimental Studies on Photoionization of Ethylbenzene

Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (10): 2063.

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Experimental Studies on Photoionization of Ethylbenzene

TAO Ling1,2, HUANG Ming-Qiang3, HAO Li-Qing1,2, ZHANG Wei-Jun1,2*, WANG Zheng-Ya1,2, KONG Rui-Hong4, SHAN Xiao-Bin4, LIU Fu-Yi4, SHENG Liu-Si4

1. Laboratory of Environment Spectroscopy,
2. Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics & Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;
3. Xiamen University Tan Kah Kee College, Zhangzhou 363100, China;
4. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China)

Received:2009-11-27 Online:2010-10-10 Published:2010-10-10
Contact: ZHANG Wei-Jun. E-mail: wjzhang@aiofm.ac.cn
Supported by:
国家自然科学基金(批准号: 10979061, 40975080)、中国科学院创新基金(批准号: KJCX2-YW-N24)和国家同步辐射实验室“教育部创新计划”同步辐射研究生创新基金(批准号: 20090162S)资助.

Abstract

Abstract: The photoionization of ethylbenzene(C8H10) was investigated using the supersonic molecular beam, the reflectron-time-of-flight mass spectrometer(RTOF-MS) and vacuum ultraviolet(VUV) synchrotron radiation. The photoionization mass spectrum(PIMS) and the photoionzation efficiency(PIE) curves of the parent ion and some fragment ions were obtained. The ionization energy(IE) of C8H10 and the appearance energies(AEs) of C7H+7 and C6H+6 were measured to be (8.66±0.02), (10.81±0.02) and (10.99±0.02) eV, respectively. The dissociation energies(Eds) to produce C7H+7 and C6H+6 were deduced to be (2.15±0.04) and (2.33±0.04) eV. The formation enthalpies of C8H+10, C7H+7 and C6H+6 were also deduced to be 865.5, 927.2 and 1037.9 kJ/mol. All the parameters are very important for investigating the oxidation mechanism of ethylbenzene in the atmosphere.

Key words: Ethylbenzene, Synchrotron radiation, Photoionization, Fragment ion

TrendMD:

TAO Ling, HUANG Ming-Qiang, HAO Li-Qing, ZHANG Wei-Jun*, WANG Zheng-Ya, KONG Rui-Hong, SHAN Xiao-Bin, LIU Fu-Yi, SHENG Liu-Si. Experimental Studies on Photoionization of Ethylbenzene[J]. Chem. J. Chinese Universities, 2010, 31(10): 2063.

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Experimental Studies on Photoionization of Ethylbenzene

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