Correction to: Polym. Bull. (2019) 76:205–213 https://doi.org/10.1007/s00289-018-2374-2

This erratum corrects the legends of Fig. 3 (inset) of the published paper. The results presented in the published paper are correct and are not affected by the change in legends of Fig. 3 (inset).

Fig. 3
figure 1

Fluorescence spectral changes of 1 immersed in HEPES buffered water–EtOH solution of Fe3+ (up to 4.64 × 10−4 M) (λexc = 350 nm). Inset: Solid-state UV–Vis spectrum of 1 when immersed in 4.64 × 10−4 M Fe3+ solution