Experimental Study on Photoionization of 1,3,5-Trimethylbenzene
Tao, Ling（Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Atmospher Composit & Opt Radiat）
Zhang, Weijun（Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Lab Environm Spect）
Wang, Zhenya（Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Lab Environm Spect）
Fang, Wenzheng（Univ Sci & Technol China, Natl Synchrotron Radiat Lab）
Shan, Xiaobin（Univ Sci & Technol China, Natl Synchrotron Radiat Lab）
Liu, Fuyi（Univ Sci & Technol China, Natl Synchrotron Radiat Lab）
Sheng, Liusi（ Univ Sci & Technol China, Natl Synchrotron Radiat Lab）
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The photoionization and dissociation of 1,3,5-trimethylbenzene (TMB, C9H12) have been obtained using supersonic molecule beam, synchrotron radiation and photoionization mass spectrometry (PIMS) The photoionization efficiency (PIE) curves of the parent ion and some fragment ions were measured The ionization energy (IE) of TMB and the appearance energies (AEs) of C9H11+ and C8H9+ were measured to be (8 32 +/- 003), (11 71 +/- 003) and (11 59 +/- 0 03) eV respectively The dissociation energies (E-d) to produce C9H11+ and C8H9+ were deduced to be (3 39 +/- 0 06) and (3 27 +/- 0 06) eV respectively The formation enthalpies of C9H12+, C9H11+ and C8H9+ were also deduced to be 786 87, 897 93 and 956 68 kJ/mol respectively
出处ACTA CHIMICA SINICA,2010,68（27）：2059-2062
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