New sol-gel oxygen sensor based on luminescence cyclometallated platinum complexes

A triethoxysilyl-functionalized cyclometallated platinum(II) complex Pt(MeOPhC∧N∧N)X (where MeOPhCN∧N=C-anion of 3-phenyl-5-p-methoxylphenyl-2,2′-bipyridine and X=NH 2(CH 2) 3Si(OCH 2CH 3) 3) was homogeneously incorporated into sol-gel glass by cocondensation with Si(OCH 2CH 3) 4. The resultant luminescence shows a rapid and sensitive response to oxygen gas: 58% luminescence is quenched in ca. 10 s when switching from dinitrogen to dioxygen. © 1998 Elsevier Science S.A. All rights reserved.link_to_subscribed_fulltex