Layers for the detection of oxygen

Oxygen permeable layer for detection of molecular oxygen, wherein the layer comprises a carrier material,

• wherein the carrier material is polyvinylidene fluoride or a copolymer of polyvinylidene fluoride, and
• wherein the carrier material comprises at least one particle,
• wherein the particle comprises a polymer or a copolymer, wherein the polymer or copolymer of the particle comprises a chemically covalently bonded indicator compound for detection of molecular oxygen, and the particle is mechanically immobilized in the carrier material;
• wherein the indicator compound is selected from a compound of formula (I):
• wherein
• M is Pd2+ or Pt2+,
• each R1 is independently CF3 or H,
• each R2 is independently —(CH2)n—R3 or H, wherein at least one R2 is —(CH2)n—R3,
• each R3 is independently ortho-styryl, meta-styryl, para-styryl, vinyl, acrylamide, methacrylamide, acrylate, methacrylate, vinyl sulfonate or vinyl sulfonamide, and
• n is an integer from 0 to 12 in case R3 is vinyl, acrylamide, methacrylamide, acrylate, methacrylate, vinyl sulfonate, or vinyl sulfonamide, and
• n is an integer from 1 to 12 in case R3 is ortho-styryl, meta-styryl, or para-styryl, and a compound of formula (II):
• wherein
• M is Pd2+ or Pt2+,
• each R1 is independently CF3 or H,
• each R2 is independently —(CH2)n—R3 or H, wherein at least one R2 is —(CH2)n—R3,
• each R3 is independently ortho-styryl, meta-styryl, para-styryl, vinyl, acrylamide, methacrylamide, acrylate, methacrylate, vinyl sulfonate, or vinyl sulfonamide, and
• n is an integer from 1 to 12.