[1] [1] Schiff H I,Ann N Y. Mass spectrometry of gases subjected to electrical discharge [J].Aca. Sci.,1957,67: 518-529.

[2] [2] Cuthbert J. Mass spectrometric sampling and detection of intermediates in gaseous reactions [J].Adv. Mass.Spectrom.,1966,3: 821-839.

[3] [3] Foner S N. Mass spectrometry of free radicals [J].Adv. Atom. Mol. Phys.,1966,2: 385-461.

[4] [4] Fujii T. A novel method for detection of radical species in the gas phase: uage of Li+ ion attachment to chemical species [J].Chem. Phys. Lett.,1992,191(1-2): 162-168.

[5] [5] Fujii T. Alkali-metal ion/molecule association reactions and their application to mass spectrometry [J].Mass Spectrom. Rev.,2000,19(3): 111-138.

[6] [6] Bentley T. Theoretical study of lithium cation interactions with hydrocarbon radicals [J].Chem. Phys. Lett.,1992,200(5): 518-523.

[7] [7] Felice G,Vittorio V. Complexes of lithium cation with nitrogen trifluoride: a computational investigation on the structure and stability of Li+-NF3 isomers [J].J. Mol. Struct.(THEOCHEM).,2001,574: 185-193.

[8] [8] Sablier M,Fujii T. Mass spectrometry of free radicals [J].Chem. Rev.,2002,9: 2855-2923.

[9] [9] Ahsen S,Willner H. Fluorocarbon oxy and peroxy radicals [J].J. Fluorine. Chem.,2004,125: 1057-1070 .

[10] [10] Wallington T J,Dagaut P,Kurylo M. UV absorption cross sections and reaction kinetics and mechanisms for peroxy radicals in the gas phase [J].Chem. Rev.,1992,92(4): 667-710.

[11] [11] Timothy J W,James C B. Spectroscopic,kinetic,and mechanistic study of CH2FO2 radicals in the gas phase at 298 K [J].J. Phys. Chem.,1992,96: 1241-1246.

[12] [12] El-taher S,El-azhary A A. Theoretical investigation of the structures and properties of fluoromethyl peroxyl radicals [J].Int . J. Quant .Chem.,2004,98: 502-514 .

[13] [13] Nandi S,Blanksby S J,et al. Polaried infrared absorption spectrum of matrix-isolated methylperoxyl radicals [J].J. Phys. Chem. A.,2002,106(33): 7547-7556.

[14] [14] Liu L,Davis SR. Matrix-isolation spectroscopic study of tetrafluoroethylene oxidation [J].J. Phys. Chem.,1992,96(24): 9719-9724.

[15] [15] Frisch M J,Trucks G W,Schlegel H B,et al. Gaussian O3 [S].Pittsburgh,pA,2003.

[16] [16] Fujii T,Tokiwa H,Ichikawa H. Li+ affinity of C2H3 and C2H5 radicals,ab initio characterization of Li+-radical complexes [J].J. Mol. Struct.(THEOCHEM).,1995,339: 209-217.

[17] [17] Fujii T,Yashiro M,Tokiwa H. Proton and Li+ cation interactions with H2O3 and H2O/O2: ab initio molecular orbital study [J].J. Am .Chem. Soc.,1997,119: 12280-12284.

[18] [18] Burk P,Koppel I A,Kopper I,et al. Revised and expanded scale of gas-phase lithium cation basicities. an experimental and theoretical atudy [J].J. Phys. Chem. A,2000,104: 2824-2833.