Luminescent oxygen probes based on TbIII complexes chemically bonded to polydimethylsiloxane
| Autor: | Pamela C. Padovani, Fernando Aparecido Sigoli, Sofia Madruga Marcondes Ferraz, Paula R. Fortes, Rafael D. L. Gaspar, Ivo M. Raimundo, Italo Odone Mazali |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Lanthanide
Materials science Polydimethylsiloxane Metals and Alloys Oxide 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Siloxane Polymer chemistry Materials Chemistry Surface modification Electrical and Electronic Engineering 0210 nano-technology Luminescence Instrumentation Oxygen sensor Curing (chemistry) |
| Zdroj: | Sensors and Actuators B: Chemical. 287:557-568 |
| ISSN: | 0925-4005 |
| Popis: | In this work, the functionalization degree of siloxane crosslinkers by allyldiphenylphosphine oxide (adppo) and its effect on the performance of a lanthanide-based optical oxygen sensor were evaluated. Linear poly(dimethyl-co-hydromethylsiloxane) (PMS) and cyclic tetramethylcyclotetrasiloxane (D4i) crosslinkers were functionalized with different concentrations of adppo to chemically bond the [Tb(dcba)3]·1/2H2O (dcba = dichlorobenzoate) complex. Mechanically stable luminescent silicone membranes were obtained after the curing of the poly(dimethylsiloxane)-vinyl terminated siloxane backbone with the pre-functionalized crosslinkers. Sensing materials exhibit green emission upon 350 nm excitation, and their luminescent properties are dependent of functionalization degree of the crosslinkers. The luminescent sensor materials show fully reversible response and non-linear Stern-Volmer plots, which are fitted by two quenching parameter model, with highest KSV of 0.08930%−1 when using functionalized D4i as crosslinker and complex concentration of 0.75%. |
| Databáze: | OpenAIRE |
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