Jungkamp , T. P. W., Kirchner , U., Schmidt, Mark and Schindler , R. N. (1995) UV Absorption Cross Section Data for the Hypochlorites ROCl (R=H, CH3, C2H5, i-C3H7, tert-C4H9). Journal of Photochemistry and Photobiology / A, Chemistry, 91 (1). pp. 1-6. DOI 10.1016/1010-6030(95)04074-P.

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Abstract

UV absorption cross-section data in the wavelength range 230 nm < λ < 400 nm are reported for the hypochlorites ROCl (R  H, CH3, C2H5, i-C3H7 or tert-C4H9). The data were obtained using a long-path UV absorption flow cell in a diode array spectrometer to a quadrupole mass spectrometer with a molecular beam sampling inlet for purity control.
The absorption spectra of all the hypochlorites studied show a strong continuous band with maximum around λ = 235–240 nm and a weak band centred at 310 nm. The alkyl substitution does not influence the spectral shape significantly. On the basis of this finding, it is suggested that the photochemical removal process for hypochlorites formed in the atmosphere will be the same as that of HOCl. The mass and IR absorption spectra of CH3OCl are included as reference.

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