| abstract |
An oxygen sensitive ink or coating with enhanced photostability, comprising an oxygen sensitive indicator, a photostabilizer, an oxygen permeable binder and a solvent mixture is provided. The oxygen sensitive indicator is selected from, but not limited to [Ru(L 1)(L2)(L3)]2+, wherein Ru represents the central ruthenium ion, Ll, L2 and L3 represent the bidentate ligands diphenylphenanthroline, phenanthroline or bipyridine ligands or optionally substituted variations of same with representative counter ions selected from (PF6)-, Cl-, BF4-, Br- and (C104)-, platinum or palladium based metallo- porphyrin. The photostabilizer is selected from, but not limited to CIBA TINUVIN 5236, TINUVIN 292, TINUVIN 123 and TINUVIN 272, TINUVIN 477W, DABCO and ascorbic acid. Oxygen sensitive elements incorporating the oxygen sensitive ink or coating are manufactured by printing on a continuous flexible or rigid substrate using printing method including ink-jet, gravure, flexographic, pad printing or pin printing. |