Luminescent dye comprising metallocomplex of a oxoporphyrin

Claim 2

Luminescent dye comprising a metallocomplex of an oxoporphyrin having a general formula: ##STR4## wherein R1 to R8 are radicals belonging to the group consisting of: H, lower alkyl (number of C≦6) or CH 2 --CH 2 --COO--R 9 , with R 9 =H or alkyl (number of C≦18) and M=Pt 2+ or Pd 2+ .

Claim 3

The dye according to claim 1, wherein R1 to R8=ethyl.

Claim 4

The dye according to claim 1, wherein R 1 =R 3 =R 5 =R 7 =methyl and R 2 =R 4 =R 6 =R 8 =CH 2 --CH 2 --COO--R 9 , with R 9 =H or alkyl (number of C≦18).

Claim 5

The dye according to claim 1, wherein R 1 =R 3 =R 5 =R 7 =methyl and R 2 =R 4 =R 6 =R 8 =CH 2 --CH 3 .

Claim 6

The dye according to claim 1, wherein R 1 =R 3 =R 5 =R 8 =methyl and R 2 =R 4 =R 6 =R 7 =CH 2 --CH 2 --COO--R 9 , with R 9 =H or alkyl (number of C≦18).

Claim 7

Active element for optical determination of oxygen in liquid and gaseous media comprising a composition prepared from at least one oxygen-permeable polymer and at least one luminescent dye distributed in said oxygen-permeable polymer, said polymer having a mass, wherein said luminescent dye is a metallocomplex of the oxoporphyrins having the general formula: ##STR5## wherein R1 to R8 are radicals belonging to a group consisting of: H, lower alkyl (number of C≦6) or CH 2 --CH 2 --COO--R 9 , with R 9 =H or alkyl (number of C≦18) and M=Pt 2+ or Pd 2+ or Zn 2+ .

Claim 8

Active element for optical determination of oxygen in liquid and gaseous media comprising a composition prepared from at least one oxygen-permeable polymer and at least one luminescent dye distributed in said oxygen-permeable polymer, said polymer having a mass, wherein said luminescent dye is a metallocomplex of the oxoporphyrins having the general formula: ##STR5## wherein R1 to R8 are radicals belonging to a group consisting of: H, lower alkyl (number of C≦6) or CH 2 --CH 2 --COO--R 9 , with R 9 =H or alkyl (number of C≦18) and M=Pt 2+ or Pd 2+ or Zn 2+ .

Claim 9

The active element according to claim 6, wherein said dye is platinum octaethyloxoporphyrin having a concentration of 1-10% of said polymer mass.

Claim 10

The active element according to claim 6, wherein said dye is palladium octaethyloxoporphyrin.

Claim 11

The active element according to claim 6, wherein said dye is zinc octaethyloxoporphyrin.

Claim 12

The active element according to claim 6, wherein said active element is prepared in the form of a film having 1-20 μm thickness.

Claim 13

The active element according to claim 10, wherein said film is applied onto a suitable solid support or optical element.

Claim 14

The active element according to claim 6, wherein said active element is additionally covered with a layer of a certain oxygen-dependent enzyme.

Claim 15

The active element according to claim 6, wherein said oxygen-permeable polymer is polystyrene.

Claim 16

Method for measuring oxygen concentration, including the following steps: using a sensitive element comprising an oxygen-permeable polymer with a distributed luminescent dye having the general formula: ##STR6## wherein R1 to R8 are radicals belonging to a group consisting of: H, lower alkyl (number of C≦6) or CH 2 --CH 2 --COO--R 9 , with R 9 =H or alkyl (number of C≦18) and M=Pt 2+ or Pd 2+ or Zn 2+ ; bringing said element into contact with a sample to be analyzed; exciting said sensitive element with an exciting wavelength optimum between 570 and 650 nm; measuring an emission wavelength optimum between 700 and 850 nm; calculating the lifetime value of the luminescent decay of said luminescent dye, and deriving the oxygen concentration from said lifetime value.

Claim 17

Method for measuring oxygen concentration, including the following steps: using a sensitive element comprising an oxygen-permeable polymer with a distributed luminescent dye having the general formula: ##STR6## wherein R1 to R8 are radicals belonging to a group consisting of: H, lower alkyl (number of C≦6) or CH 2 --CH 2 --COO--R 9 , with R 9 =H or alkyl (number of C≦18) and M=Pt 2+ or Pd 2+ or Zn 2+ ; bringing said element into contact with a sample to be analyzed; exciting said sensitive element with an exciting wavelength optimum between 570 and 650 nm; measuring an emission wavelength optimum between 700 and 850 nm; calculating the lifetime value of the luminescent decay of said luminescent dye, and deriving the oxygen concentration from said lifetime value.

Claim 18

The method according to claim 14, wherein said sensitive element is linked to a luminescent detector, having its optimum between 700 and 850 nm, by means of fibre optics and wherein excitation is performed with a LED having emission optimum between 570 and 650 mm.

Claim 19

The method according to claim 14, wherein said luminescent measurement is performed in pulsed mode with time resolution.

Claim 22

The method according to claim 17, wherein said sensitive element is linked to a luminescent detector, having its optimum between 700 and 850 nm, by means of fibre optics and wherein excitation is performed with a LED having emission optimum between 570 and 650 nm.

Claim 23

The active element according to claim 6, wherein said oxygen-permeable polymer is polyvinylchloride.

Claim 24

The active element according to claim 6, wherein said oxygen-permeable polymer is plasticized polyvinylchloride.