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Typical response to DO using F2 (covalently crosslinked 2 in PHEMA) in B-R pH 7.0 buffer (A) and the Stern-Volmer fittings (B) for F2, F4 (physically doped PtTFPP in PHEMA), F6 (covalently crosslinked 2 in PS) and F8 (physically doped PtTFPP in PS) excited at 405 nm. I0 is the emission intensity in the deoxygenated buffer by flushing with nitrogen. I is the emission intensity of oxygen-containing solutions equilibrated with different oxygen partial pressures.
