55450-33-4Relevant academic research and scientific papers
Visible Absorption Spectra and Two-Photon Photodissociation of Halobenzene Cations in Solid Argon
Keelan, Brian W.,Andrews, Lester
, p. 829 - 832 (1981)
Matrix photoionization experiments with bromobenzene, chlorobenzene, and fluorobenzene precursors produced absorptions dur to bromobenzene cation at 505 +/- 5 nm, chlorobenzene cation at 470 +/- 2 nm, and fluorobenzene cation at 431 +/- 1 nm, respectively, in excellent agreement with gas-phase photodissociation and photoelectron spectra.Two-photon dissosiation of the bromobenzene cation in solid argon was affected by photolysis in the very strong visible n2 ->? charge-transfer electronic transition, as found in earlier gas-phase work.The lack of significant two-photon dissociation of fluorobenzene cation is attributed to lower oscillator strength for the ?->? transition corresponding to absorption of the first photon.
Vibrational Spectroscopy and Photodissociation Properties of Ions As Determined by Two-Laser Photodissociation Techniques.
Honovich, Jeffrey P.,Dunbar, Robert C.
, p. 3755 - 3758 (2007/10/02)
Iodobenzene, bromobenzene, and m-iodotoluene cations trapped in an ion cyclotron resonance (ICR) mass spectrometer undergo an enhanced visible photodissociation process in the presence of infrared irradiation.The infrared wavelength dependence in the 9.7-10.7-μm region for this effect exhibits features wich relate to the infrared spectroscopy of these ions.The variation in extent of the infrared enhancement with visible wavelength is interpreted as reflecting two different mechanisms: at short wavelengths the enhancement is attributed to changes invisible-absorption cross section with increasing internal energy and gives a useful means of observing such effects, while at long wavelengths the enhancement is attributed to a perturbation of the two-photon dissociation kinetics.The photodissociation rates of several other ions were shown not to undergo an enhancement effect when irradiated with the infrared laser.
