title: Thin-film oxygen sensors using a luminescent polynuclear gold(I) complex.
abstract: Robust thin-film oxygen sensors were fabricated by encapsulating a lipophilic, polynuclear gold(I) complex, bis{m-(bis(diphenylphosphino)octadecylamine-P,P')}dichlorodigold(I), in oxygen permeable polystyrene and ormosil matrices. Strong phosphorescence, which was quenched by gaseous and dissolved oxygen, was observed from both matrices. The polystyrene encapsulated dye exhibited downward-turning Stern-Volmer plots which were well fitted by a two-site model. The ormosil trapped complex showed linear Stern-Volmer plots for dissolved oxygen quenching but was downward turning for gaseous oxygen. No leaching was observed when the ormosil based sensors were immersed in flowing water over an 8 h period. Both films exhibited fully reversible response and recovery to changing oxygen concentration with rapid response times.
authors.affiliation: Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, UK G1 1XL.
authors.forename: A
authors.initials: A
authors.lastname: Mills
authors.forename: C
authors.initials: C
authors.lastname: Tommons
authors.forename: R T
authors.initials: RT
authors.lastname: Bailey
authors.forename: P
authors.initials: P
authors.lastname: Crilly
authors.forename: M C
authors.initials: MC
authors.lastname: Tedford
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation / Q000379:methods*; D049408:Luminescent Agents / Q000737:chemistry*; D050607:Organogold Compounds / Q000737:chemistry*; D010100:Oxygen / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D011137:Polystyrenes / Q000737:chemistry; D015203:Reproducibility of Results; D012833:Siloxanes / Q000737:chemistry; D013997:Time Factors
chemical_list: D049408:Luminescent Agents; D050607:Organogold Compounds; D011137:Polystyrenes; D012833:Siloxanes; C510784:ormosil; D010100:Oxygen