Figure 5.
(a) Fluorescence spectra of Poly-2 with cyanide anion at different concentrations under the conditions of Poly-2 solution at 22 mg L−1 (the concentration of urea group was 91 μM) in DMF/H2O (v/v = 1:1) at λex = 350 nm. (b) The dependence of fluorescence intensity maximum (left) and the wavelength at maximum emission (right) of Poly-2 on the molar concentration of cyanide anion. (c) Particle size distribution and average hydrodynamic diameter of Poly-2 (red), Poly-2 + 0.10 mM CN− (blue), Poly-2 + 1.0 mM CN− (green), and Poly-2 + 10.0 mM CN− (brown) determined by DLS in DMF/H2O (v/v = 1:1) under the same conditions with (a)