The Effect of the Argon Carrier Gas in the Multiphoton Dissociation-Ionization of Tetracene

International Journal of Molecular Sciences

Juan Carlos Poveda¹  Alejandro San Román²  Alfonso Guerrero²  Ignacio Álvarez² 

[1] Laboratorio de Colisiones Atómicas Moleculares, Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Av. Universidad Colonia Chamilpa, Cuernavaca, Morelos C.P. 62210, México

关键词: Polycyclic Aromatic Hydrocarbons;    Tetracene;    Multiphoton dissociation;    ToF-MS;   

DOI  :  10.3390/ijms9102003

来源: mdpi

【 摘 要 】

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 CH_m⁺ (m = 2, 4), C₂H₄⁺ and C₅H₄⁺² ions. CH₅⁺ and CH₆⁺ were observed which have not been reported before in photodissociation tetracene experiments.

【 授权许可】

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