Correction to: Catalysis Letters (2019) 149:2132–2141 https://doi.org/10.1007/s10562-019-02816-5

An error appeared in our paper entitled “Bulk Ring-Opening Polymerization of ε-Caprolactone by Zeolitic Imidazolate Framework” published in Catalysis Letters. The wrong version of Fig. 7 has been used in the article. The corrected Fig. 7 is shown below.

Fig. 7
figure 7

Powder X-ray diffraction patterns of ZIF-8 (before use) and recovered ZIF-8 (after 3rd cycle). a SEM pictures of ZIF-8 (scale bar: 2 μm), b SEM micrographs of recovered ZIF-8 (1 μm)