Experimental and Theoretical Study of the XYO (X, Y = Cl, Br) Light-Induced Interconversion in Argon Matrix
摘要:
The complex ClBrO has been generated in argon matrix by photolysis of the O-3:BrCl complex and has been characterized by its Fourier-transform IR spectrum. Wavelength dependence of ClBrO photochemistry has been determined in the range from 317 to 870 nm by using laser irradiations and in the frequency region of a Nernst globar. Visible irradiation between 633 and 700 nm transforms ClBrO into BrClO and that above 700 nm continues the transformation into BrOCl. Reverse photoisomerization of BrOCl into ClBrO or BrClO was not observed. BrClO but not ClBrO is sensitive to IR irradiation. Calculations are combined with experimental observations to present a model for the photochemical isomerization of ClBrO and a comparison with related Cl2O and Br2O isomerizations.
Photolysis of argon samples containing Cl2, Br2, O3 with 800-360 nm irradiation produced new absorptions at 940.9-932.7 and 818.9-817.5 cm−1, which were assigned to the new BrClO and ClBrO species. Formation of these species proceeds through photodissociation of BrCl: O3 and ClBr: O3 complexes. Photolysis of ClBrO molecules above 400 nm produced BrCl species.
含Cl 2,Br 2,O 3的氩气样品在800-360 nm照射下发生光解,在940.9-932.7和818.9-817.5 cm -1处产生新的吸收,这些吸收被指定为新的BrClO和ClBrO种类。这些物质的形成通过BrCl:O 3和ClBr:O 3络合物的光解而进行。ClBrO分子在400 nm以上的光解产生BrCl物质。