Luminescent oxygen sensor based on a lanthanide complex
US4861727A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1986 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Sep 8, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/207497
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An oxygen sensor is provided for determination of the partial pressure of oxygen. In one aspect, the invention consists of oxygen-quenchable luminescent lanthanide complexes for an oxygen sensor. The complexes are oxygen-quenchable even though immobilized in a solid matrix, such as a solid polymeric matrix, and preferably are terbium complexes of Schiff base or .beta.-diketone ligands. Certain preferred processes are described for improving the oxygen sensitivity of the lanthanide complexes. In another aspect, the invention consists of a combination measuring and reference analyte sensor containing both quenchable and nonquenchable luminescent materials. The materials luminesce at different wavelengths and thus may be transmitted together down a single optical fiber and later descriminated by means of filters and separately detected. In a third aspect, the invention consists of a low-noise phosphorescent analyte sensor employing a gatable detector. By use of an analyte-quenchable material having a relatively long-lived phosphorescence, a pulsed excitation source, and selectively coupling the detector after the excitation source is off and any short-lived background luminescence has…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.