Development of Dissolved Oxygen Sensor Based on Time‐domain Lifetime Measurement with a Sensing Film Fabricated by Embedding PtOEP in Highly Stable and Highly Hydrophobic Fluorinated Matrix

• Published in: Chemistry, an Asian journal Vol. 17; no. 14; pp. e202200365 - n/a
• Main Authors: Xu, Yihan, Qi, Guoping, Yan, Liuming, Yue, Baohua, Yang, Yang, Hu, Desheng
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 15.07.2022
• Subjects: Chemistry; Dissolved oxygen; dissolved oxygen sensor; domain lifetime measurement; Domains; Embedding; Fluorescence; fluorinated polymer; Fluorination; Free radical polymerization; Free radicals; Hydrophobicity; Oxygen probes; Service life assessment; Stability; Time measurement; dissolved oxygen; dissolved oxygen sensor; fluorinated polymer; domain lifetime measurement
• ISSN: 1861-4728; 1861-471X
• DOI: 10.1002/asia.202200365

A dissolved oxygen sensor was developed based on time‐domain lifetime measurement with an oxygen sensing film. The oxygen sensing film was fabricated by embedding PtOEP in a highly stable and highly hydrophobic fluorinated matrix synthesized from methacrylate, fluorinated methacrylate, and 3‐(tris(trimethylsilyloxy)silyl)propyl methacrylate via free radical polymerization. The fluorinated methacrylate provided the high stability and the 3‐(tris(trimethylsilyloxy)silyl)propyl methacrylate provided the extra hydrophobicity. The PtOEP was excited using pulsed signals from a green‐light LED and the fluorescence lifetime was evaluated by time‐domain lifetime measurement. The dynamical quenching of fluorescence response by dissolved oxygen was calibrated using the Stern‐Volmer plot with a high τ0/τ100 ratio of 5.68 and a Stern‐Volmer constant of 0.112 mg−1 dm3. It was demonstrated that the dissolved oxygen sensing film showed high stability under the varied excitation intensity and long‐term stability in the accelerated aging experiment and the repeated freeze‐thaw‐cycling tests. A dissolved oxygen sensor was developed based on time‐domain lifetime measurement with an oxygen sensing film. And the dissolved oxygen sensing film showed great long‐term stability in the accelerated aging experiment and the repeated freeze‐thaw‐cycling tests by incorporation of the fluorinated methacrylate and the 3‐(tris(trimethylsilyloxy)silyl)propyl methacrylate into the polymeric matrix.