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. © 2011 Elsevier B.V.
| Original language | English |
|---|---|
| Pages (from-to) | 269-273 |
| Number of pages | 5 |
| Journal | Analytica Chimica Acta |
| Volume | 702 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 30 Sept 2011 |
Keywords
- Gold complex
- Ormosil
- Oxygen sensor
- Phosphorescence
- Polystyrene
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