A method for the production of a sol-gel based matrix comprising the steps of: a) providing a first alkoxysilane of the general formula: R 1 -Si(OR 2) 3 and a second alkoxysilane of the general formula: wherein R 1 represents a straight or branched C 1 -C 6 alkyl or C 2 -C 6 alkenyl, a C 3 -C 6 cycloalkyl, a C 1 -C 6 aminoalkyl, a C 1 -C 6 hydroxyalkyl, a C 1 -C 6 cyanoalkyl, a phenyl, a group of the formula -Y-(X-Y) n H, wherein Y independently is selected from straight or branched C 1 -C 6 alkylene, X is a hetero atom or group selected among O, S, NH, and n is an integer of 1-5, or R 1 represents a C 1 -C 6 alkyl substituted with a group Z, wherein Z independently is selected form the group comprising hydrogen, cyano, halogen, hydroxy, nitro, amide C 1 -C 24 -alkyl, C 1 -C 24 -haloalkyl, C 2 -C 24 -alkeny), C 2 -C 24 -alkynyl, aryl, C 1 -C 24 -alkoxy, C 1 -C 24 -alkylsulfonyl, amino, aminocarbonyl, aminothiocarbonyl, aminocarbonylamino, aminothiocarbonylamino, aminocarbonyloxy, aminosulfonyl, aminosulfonyloxy, aminosulfonylamino, amidino, carboxyl, carboxyl ester comprising a C 1 -C 6 alkyl alcohol moiety, (carboxyl ester)amino comprising a C 1 -C 6 alkyl alcohol moiety, (carboxyl ester)oxy comprising a C 1 -C 6 alkyl alcohol moiety, sulfonyl, sulfonyloxy, thiol, thiocarbonyl, C 1 -C 24 -alkylthio, 5 or 6 membered heteroaryl, or a C 3 -C 7 cycloalkyl; R 2 independently represents a straight or branched C 1 -C a alkyl; and R 3 represents a linker chosen from a group of the formula -R 4 -(X-R 4) n - wherein R 4 independently is selected from straight or branched C 2 -C 6 alkylene, C 2 -C 24 -haloalkylene, X is a hetero atom or group selected among O, S, NH, and n is an integer of 0-12, b) preparing a first sol-gel component by polymerisation of the first alkoxysilane in the presence of an acid catalyst, c) preparing a second sol-gel component by polymerisation of the second alkoxysilane in the presence of a Lewis acid catalyst, d) Mixing the first sol-gel component and the second sol-gel component for the preparation of a sol-gel based matrix. a) providing a first alkoxysilane of the general formula: R 1 -Si(OR 2) 3 and a second alkoxysilane of the general formula: wherein R 1 represents a straight or branched C 1 -C 6 alkyl or C 2 -C 6 alkenyl, a C 3 -C 6 cycloalkyl, a C 1 -C 6 aminoalkyl, a C 1 -C 6 hydroxyalkyl, a C 1 -C 6 cyanoalkyl, a phenyl, a group of the formula -Y-(X-Y) n H, wherein Y independently is selected from straight or branched C 1 -C 6 alkylene, X is a hetero atom or group selected among O, S, NH, and n is an integer of 1-5, or R 1 represents a C 1 -C 6 alkyl substituted with a group Z, wherein Z independently is selected form the group comprising hydrogen, cyano, halogen, hydroxy, nitro, amide C 1 -C 24 -alkyl, C 1 -C 24 -haloalkyl, C 2 -C 24 -alkeny), C 2 -C 24 -alkynyl, aryl, C 1 -C 24 -alkoxy, C 1 -C 24 -alkylsulfonyl, amino, aminocarbonyl, aminothiocarbonyl, aminocarbonylamino, aminothiocarbonylamino, aminocarbonyloxy, aminosulfonyl, aminosulfonyloxy, aminosulfonylamino, amidino, carboxyl, carboxyl ester comprising a C 1 -C 6 alkyl alcohol moiety, (carboxyl ester)amino comprising a C 1 -C 6 alkyl alcohol moiety, (carboxyl ester)oxy comprising a C 1 -C 6 alkyl alcohol moiety, sulfonyl, sulfonyloxy, thiol, thiocarbonyl, C 1 -C 24 -alkylthio, 5 or 6 membered heteroaryl, or a C 3 -C 7 cycloalkyl; R 2 independently represents a straight or branched C 1 -C a alkyl; and R 3 represents a linker chosen from a group of the formula -R 4 -(X-R 4) n - wherein R 4 independently is selected from straight or branched C 2 -C 6 alkylene, C 2 -C 24 -haloalkylene, X is a hetero atom or group selected among O, S, NH, and n is an integer of 0-12, R 1 represents a straight or branched C 1 -C 6 alkyl or C 2 -C 6 alkenyl, a C 3 -C 6 cycloalkyl, a C 1 -C 6 aminoalkyl, a C 1 -C 6 hydroxyalkyl, a C 1 -C 6 cyanoalkyl, a phenyl, a group of the formula -Y-(X-Y) n H, wherein Y independently is selected from straight or branched C 1 -C 6 alkylene, X is a hetero atom or group selected among O, S, NH, and n is an integer of 1-5, or R 1 represents a C 1 -C 6 alkyl substituted with a group Z, wherein Z independently is selected form the group comprising hydrogen, cyano, halogen, hydroxy, nitro, amide C 1 -C 24 -alkyl, C 1 -C 24 -haloalkyl, C 2 -C 24 -alkeny), C 2 -C 24 -alkynyl, aryl, C 1 -C 24 -alkoxy, C 1 -C 24 -alkylsulfonyl, amino, aminocarbonyl, aminothiocarbonyl, aminocarbonylamino, aminothiocarbonylamino, aminocarbonyloxy, aminosulfonyl, aminosulfonyloxy, aminosulfonylamino, amidino, carboxyl, carboxyl ester comprising a C 1 -C 6 alkyl alcohol moiety, (carboxyl ester)amino comprising a C 1 -C 6 alkyl alcohol moiety, (carboxyl ester)oxy comprising a C 1 -C 6 alkyl alcohol moiety, sulfonyl, sulfonyloxy, thiol, thiocarbonyl, C 1 -C 24 -alkylthio, 5 or 6 membered heteroaryl, or a C 3 -C 7 cycloalkyl; R 2 independently represents a straight or branched C 1 -C a alkyl; and R 3 represents a linker chosen from a group of the formula -R 4 -(X-R 4) n - wherein R 4 independently is selected from straight or branched C 2 -C 6 alkylene, C 2 -C 24 -haloalkylene, X is a hetero atom or group selected among O, S, NH, and n is an integer of 0-12, b) preparing a first sol-gel component by polymerisation of the first alkoxysilane in the presence of an acid catalyst, c) preparing a second sol-gel component by polymerisation of the second alkoxysilane in the presence of a Lewis acid catalyst, d) Mixing the first sol-gel component and the second sol-gel component for the preparation of a sol-gel based matrix.