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. Author manuscript; available in PMC: 2018 Oct 25.
Published in final edited form as: J Am Chem Soc. 2017 Sep 8;139(42):14954–14960. doi: 10.1021/jacs.7b06371

Figure 5.

Figure 5

Fluorescence titration profiles of S2 (3 μM) with opiates in H2O (pH 3, HCl). Top: [heroin] = 0–40 μM, λex = 310 nm; Middle: [morphine] = 0–200 μM, λex = 305 nm; Bottom: [oxycodone] = 0–100 μM, λex= 290 nm; Graph insets show titration isotherms based on the change of fluorescence intensity at max. wavelength.