Estudio comparativo de disociación de iones moleculares inducida por absorción secuencial de fotones infrarrojos
DOI:
https://doi.org/10.32480/rscp.2018-23-1.35-56Palabras clave:
iones moleculares, disociación, activación multifotónicaResumen
La disociación de iones moleculares de acetofenonas sustituidas inducidas por absorción multifotónica secuencial de fotones infrarrojos ha sido estudiada en un espectrómetro de resonancia ciclotrónica de iones por transformada de Fourier con el objetivo de obtener datos termoquímicos. Dos métodos diferentes se han usado para este fin: 1) la radiación emitida por un filamento de tungsteno incandescente situado en la propia celda del espectrómetro, y 2) un láser continuo de CO2. En el primer caso, es posible obtener una pseudo energía de activación a partir de los valores de la constante de disociación en función de la temperatura. En el segundo caso, el estudio de la constante de disociación en función de la intensidad de la radiación del láser ofrece una alternativa para obtener la energía de activación. El uso de una ecuación cinética maestra se ha utilizado para obtener valores aproximados de las energías de disociación y se discuten las limitaciones de los métodos.
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