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The Effect of the Argon Carrier Gas in the Multiphoton Dissociation-Ionization of Tetracene
Laboratorio de Colisiones Atómicas Moleculares, Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Av. Universidad Colonia Chamilpa, Cuernavaca, Morelos C.P. 62210, México
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Received: 12 August 2008; in revised form: 10 October 2008 / Accepted: 15 October 2008 / Published: 28 October 2008
Abstract: The multiphoton dissociation-ionization of tetracene at 355 nm using 6.5 nanosecond laser pulses, with and without argon as a carrier gas (CG), has been studied and compared. Ion fragments were analyzed in a time-of-flight mass spectrometer and separated according to their mass-to-charge ratio (m/z). The results show that the dynamic of photodissociation at ~1010 W⋅cm-2 intensities is strongly influenced by the CG. The suppression of fragmentation channels primarily those relating to the formation of the CHm+ (m = 2, 4), C2H4+ and C5H4+2 ions. CH5+ and CH6+ were observed which have not been reported before in photodissociation tetracene experiments.
Keywords: Polycyclic Aromatic Hydrocarbons; Tetracene; Multiphoton dissociation; ToF-MS
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Poveda, J.C.; San Román, A.; Guerrero, A.; Álvarez, I.; Cisneros, C. The Effect of the Argon Carrier Gas in the Multiphoton Dissociation-Ionization of Tetracene. Int. J. Mol. Sci. 2008, 9, 2003-2015.
Poveda JC, San Román A, Guerrero A, Álvarez I, Cisneros C. The Effect of the Argon Carrier Gas in the Multiphoton Dissociation-Ionization of Tetracene. International Journal of Molecular Sciences. 2008; 9(10):2003-2015.
Poveda, Juan C.; San Román, Alejandro; Guerrero, Alfonso; Álvarez, Ignacio; Cisneros, Carmen. 2008. "The Effect of the Argon Carrier Gas in the Multiphoton Dissociation-Ionization of Tetracene." Int. J. Mol. Sci. 9, no. 10: 2003-2015.