Oxidatively robust monophenolate-copper(ii) complexes as potential models of galactose oxidaseElectronic supporting information (ESI) available: Synthetic procedures and instrumental methods, crystallographic data for [LPhenCuII(CF3SO3)] and [LPhenCuIICl], and Figures S1, S2 and S3. See http://www.rsc.org/suppdata/cc/b2/b212921c/