+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Productions of I, I*, and C2H5 in the A-band photodissociation of ethyl iodide in the wavelength range from 245 to 283 nm by using ion-imaging detection

, : Productions of I, I*, and C2H5 in the A-band photodissociation of ethyl iodide in the wavelength range from 245 to 283 nm by using ion-imaging detection. Journal of Chemical Physics 126(6): 064302-064302

Photodissociation dynamics of ethyl iodide in the A band has been investigated at several wavelengths between 245 and 283 nm using resonance-enhanced multiphoton ionization technique combined with velocity map ion-imaging detection. The ion images of I, I(*), and C(2)H(5) fragments are analyzed to yield corresponding speed and angular distributions. Two photodissociation channels are found: I(5p (2)P(3/2))+C(2)H(5) (hotter internal states) and I(*)(5p (2)P(1/2))+C(2)H(5) (colder). In addition, a competitive ionization dissociation channel, C(2)H(5)I(+)+h nu-->C(2)H(5)+I(+), appears at the wavelengths <266 nm. The I/I(*) branching of the dissociation channels may be obtained directly from the C(2)H(5) (+) images, yielding the quantum yield of I(*) about 0.63-0.76, comparable to the case of CH(3)I. Anisotropy parameters (beta) determined for the I(*) channel remain at 1.9+/-0.1 over the wavelength range studied, indicating that the I(*) production should originate from the (3)Q(0) state. In contrast, the beta(I) values become smaller above 266 nm, comprising two components, direct excitation of (3)Q(1) and nonadiabatic transition between the (3)Q(0) and (1)Q(1) states. The curve crossing probabilities are determined to be 0.24-0.36, increasing with the wavelength. A heavier branched ethyl group does not significantly enhance the I(5p (2)P(3/2)) production from the nonadiabatic contribution, as compared to the case of CH(3)I.


PMID: 17313210

DOI: 10.1063/1.2435341

Other references

Takeuchi, W., 2004: Botanical notes from the New Guinea ultrabasic flora. Gardenia kamialiensis (Rubiaceae) is newly described from the Morobe serpentine of Papua New Guinea. Supplementary descriptions are also provided for the previously unknown flowers of Guioa waigeoensis (Sapindaceae) and Psychotria haumugaensis (Ru...

Landry, G.J.; Moneta, G.L.; Taylor, L.M.J.; Edwards, J.M.; Yeager, R.A., 2003: Comparison of procedural outcomes after lower extremity reversed vein grafting and secondary surgical revision. Objective: Many lower extremity vein graft procedures require revision. Although morbidity associated with revision procedures is assumed minimal, this has not been previously quantified and may be underestimated. In this study, patient outcome af...

Djelantik, A.A.A.Manik.J.; Smid, G.E.; Kleber, R.J.; Boelen, P.A., 2016: Symptoms of prolonged grief, post-traumatic stress, and depression after loss in a Dutch community sample: A latent class analysis. NlmCategory="UNASSIGNED">Mental health problems following loss can manifest as heterogeneous symptomatology that may include symptoms of Prolonged Grief Disorder (PGD), Post-Traumatic Stress Disorder (PTSD), and Major Depressive Disor...

Defaut, B., 1988: Determination des Orthopteroides ouest-palearctiques. 3. Le genre Pyrgomorpha au Maroc (Caelifera: Pyrgomorphidae). The new subspecies Pyrgomorpha agarena zaeriana was proposed and described. A determination key for the species and subspecies of this genus was also proposed. Seven species were provisionally reported for Morocco: Pyrgomorpha cognata, P. conica,...

Asumadu-Mensah, A.; Smith, K.W.; Ribeiro, H.S., 2014: Solid lipid dispersions: potential delivery system for functional ingredients in foods. Structured solid lipid (SL) systems have the advantages of long-term physical stability, low surfactant concentrations, and may exhibit controlled release of active ingredients. In this research work, the potential use of high-melting SLs for the...

Mallory, S.B.; Morris, P., 1989: Bleeding hemangioma detected by enuresis blanket. Pediatric Dermatology 6(2): 139-140

Vetrone, S.A.; Montecino-Rodriguez, E.; Kudryashova, E.; Kramerova, I.; Hoffman, E.P.; Liu, S.D.; Miceli, M.Carrie.; Spencer, M.J., 2009: Osteopontin promotes fibrosis in dystrophic mouse muscle by modulating immune cell subsets and intramuscular TGF-beta. Duchenne muscular dystrophy (DMD) is an X-linked, degenerative muscle disease that is exacerbated by secondary inflammation. Here, we characterized the immunological milieu of dystrophic muscle in mdx mice, a model of DMD, to identify potential th...

Traugott, N.N., 1960: Problems on the evolutional-physiological study of damage to the higher nervous activity in cases of mental diseases. Academy Of Sciences, Ussr: Ems Of Evolution Of Physiological Functions. 143-154

Leonov, B.V.; Persianinov, L.S.; Chupriianova, N.E.; Veĭnberg, A.Ia.; Samokhvalov, G.I., 1973: Chromatographic mobility and the ability to form a complex with serotonin of the gangliosides of sea urchin gametes. Akusherstvo i Ginekologiia 49(12): 37-41

Krause, I.B., 1994: Numbers and meaning: a dialogue in cross-cultural psychiatry. Journal of the Royal Society of Medicine 87(5): 278-282