USEFUL COMPOSITIONS FOR THE DETECTION OF OXYGEN METHOD FOR THE PREPARATION OF SAID COMPOSITIONS AND OXYGEN DETECTORS CONTAINING THEM

摘要

The present invention relates to compositions useful for the detection of oxygen in a humid medium, characterized in that they comprise at least one complex of the formula (LMX)n in which the ligand L is selected from among the groups: IMAGE IMAGE IMAGE where: R represents Cl,Br,NO2,C1-4-alkoxyl, C1-4-alkyl, m and p are comprised between 0 and 3, q is comprised between 0 and 2, the substituent R on the pyridine nuclei never occupying a position neighboring the nitrogen atom, X=Cl,Br,I,NO3,C104, M represents Cu or Mn, and n is equal to 1 or 2, as colored indicator of the presence of oxygen in a humid medium, in solution in an acceptable solvent. The present invention also relates to a process for preparing such compositions, and detectors of the presence of oxygen comprising them.