Figure 3.
(a) Fluorescence spectra of Poly-1 in the absence and presence of different anions under the conditions of Poly-1 solution at 22 mg L−1 (the concentration of urea group was 60 μM) and anion solution at 1.0 mM in DMF/H2O (v/v = 1:1) at 25 °C and λex = 350 nm. (b) Maximum fluorescent intensity at 468 nm of Poly-1 + anion under the same conditions with (a). (c) Particle size distribution and average hydrodynamic diameter of Poly-1 (red), Poly-2 + Br− (blue), and Poly-2 + CN− (green) determined by DLS in DMF/H2O (v/v = 1:1) under the same conditions with (a)