Xu Y, Qi G, Yan L, Yue B, Yang Y, Hu D. Development of dissolved oxygen sensor based on time-domain lifetime measurement with a film fabricated by embedding PtOEP in a highly stable and hydrophobic fluorinated matrix.
Chem Asian J 2022;
17:e202200365. [PMID:
35587017 DOI:
10.1002/asia.202200365]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/05/2022] [Indexed: 11/08/2022]
Abstract
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 [[EQUATION]] ratio of 5.68 and a Stern-Volmer constant of 0.112 mg -1 dm 3 . 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.
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