Figure 9
From: Naphthyridine derived colorimetric and fluorescent turn off sensors for Ni2+ in aqueous media
Color change of the test strips of L4 (1 × 10−3 M) at various concentrations of Ni2+ in water, from left to right: 0, 1 × 10−3 M, 1 × 10−4 M, 1 × 10−5 M and 1 × 10−6 M.
