title: Spectral image analysis for the absorption bands of the beta-methallyl free radical in the vapor phase.
abstract: The radicals formed in the flash photolysis of 2-methylbut-1-ene and subsequent reactions have been investigated by kinetic spectroscopy and gas liquid chromatography. Less than 10% of photo products are formed by a molecular made of fission of the excited olefin, and of the radical modes the relative probabilities of band fission, beta(CH):beta(CH):alpha(CC) are 13:1.37:1. The extinction coefficients of beta-methallyl radical measured experimentally for all the absorption bands. The decay of the beta-methallyl radical was second order. The rate constant for the beta-methallyl radical recombination experimentally measured was 2.6+/-0.3 x 10(10) l mol(-1)s(-1) at 295+/-2K. The spectrum image showing the absorption bands was examined by image processing techniques in order to improve the visual experience of each band by localizing to a specific region of interest. Experimental results illustrate how the exact location of absorption bands was clearly extracted from the spectral image and further improvements in the visual detection of absorption bands.
authors.affiliation: Department of Biomedical Engineering, Yeditepe University, Istanbul 34755, Turkey. fubay@yeditepe.edu.tr
authors.forename: Fuat
authors.initials: F
authors.lastname: Bayrakçeken
authors.forename: Ziya
authors.initials: Z
authors.lastname: Telatar
authors.forename: Fikret
authors.initials: F
authors.lastname: Ari
authors.forename: Aykut B
authors.initials: AB
authors.lastname: Bayrak
mesh_terms: D000042:Absorption; D000475:Alkenes / Q000737:chemistry; D000498:Allyl Compounds / Q000737:chemistry*; D005609:Free Radicals; D005740:Gases / Q000737:chemistry*; D007700:Kinetics; D010782:Photolysis; D013053:Spectrophotometry; D013997:Time Factors
chemical_list: D000475:Alkenes; D000498:Allyl Compounds; D005609:Free Radicals; D005740:Gases; C008176:isobutylene