The authors would like to add one citation to ref. 46 of their published paper: M. Dufaye, S. Duval, G. Stoclet, X. Trivelli, M. Huve', A. Moissette and T. Loiseau, Inorg. Chem., 2019, 58, 1091-1099. The full reference is provided below as ref. 1. The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.