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Fluorescence emission spectra of the AIE-S-Cu (20 μM for AIE-S and 10 μM for Cu2+ ) in HEPES buffer (10 mM, pH 7.4, 25oC, 10% THF) right after the addition of Na2S or other biologically relevant anions, biothiols (20 μM) (λex = 533 nm). (a) Spectra collected between 490-675 nm. (b) Emission intensity at 533 nm (y) when different species (x) were added.
