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- W4309420766 abstract "Electrospinning fibers doped with phosphorescent Cu(I) complexes have been demonstrated as promising O2 sensing systems, but traditional oxygen sensing systems based on electrospinning fibers have low sensitivity (<10). In this work, three multi-cored phosphorescent Cu(I) probes were firstly synthesized and discussed via their single crystals and photophysical analysis. A long-lived lifetime of 7.9 μs with emission peaking at 441 nm and quantum yield of 0.45 was obtained. Time-dependent density functional theory (DFT) calculation was performed at RB3LYP/LANL2DZ level which revealed a metal-to-ligand-charge-transfer-based electronic transition in excited state, favoring oxygen sensing. Then narrowed electrospinning fibers (diameter<200 nm) were synthesized using a high-pressure pump. The Cu(I) probes were doped into these narrowed electrospinning fibers with three doping levels (5wt%, 10wt%, and 15wt%), so that sample specific surface area was increased to allow more collision chances with O2 molecules. A detailed comparison between normal fibers and narrowed fibers was performed. Our optimal sample showed sensitivity of 20.99 with a linear working equation of I0/I=0.656+0.198*[O2], R2=0.999. This value is by far the highest one among oxygen sensors based on phosphorescent Cu(I) complexes. The limit of detection was as low as 2.2% (O2%). Corresponding response and recovery time values were 7 and 20 seconds. It was found that using narrowed fibers as host was an effective way to improve oxygen sensing performance, showing higher sensitivity, linear calibration curve and faster response behavior." @default.
- W4309420766 created "2022-11-27" @default.
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- W4309420766 date "2023-03-01" @default.
- W4309420766 modified "2023-10-17" @default.
- W4309420766 title "Oxygen sensing performance improvement by the combination of narrowed electrospinning fibers and multi-cored phosphorescent photosensitizer: Strategy and performance comparison" @default.
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- W4309420766 doi "https://doi.org/10.1016/j.molstruc.2022.134592" @default.
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