LUMINESCENCE STUDY OF COPPER HALIDES IN OXYGEN DISCHARGE FLOW CONTAINING CHLORINE

Copper halide luminescence was measured when CuBr heated at 500K, was vaporized into oxygen discharge flow in the absence and presence of ch lorine (Cl-2). With a slight Cl-2 addition, emission peaks for CuCl tr ansitions were detected instead of the CuBr transitions. As Cl-2 was a dded in the range of 0.24-6.7 mmol/min, the blue luminescence for CuCl transitions was gradually changed to a red color for the CuCl2 transi tion. Evidence of the excitation process for CuBr and CuCl2 was shown by the observation of NO2 chemiluminescence and O-2((1) Delta) emissio n in the discharged flow. The results indicated that atomic oxygen and singlet oxygen species are responsible for the excitation of CuBr and CuCl2, respectively.