Figure 6
From: Naphthyridine derived colorimetric and fluorescent turn off sensors for Ni2+ in aqueous media
(a) Absorbance responses of L4 (20 µM) in the presence of Ni2+ (10 µM) with 10 equivalents of various metal ions in DMSO–H2O (v/v = 1:2) HEPES buffer solutions at pH = 7.4, (b) Absorbance at 537 nm of receptor L4 (20 µM) in the presence of Ni2+ (10 µM) in the presence of 10 equivalents of various anions in DMSO–H2O (v/v = 1:2) HEPES buffer solutions at pH = 7.4, (c) The color changes of L4 upon addition of Ni2+ and various anions (1–10).
