Two low-dimensional Schiff base copper(i/ii) complexes: synthesis, characterization and catalytic activity for degradation of organic dyesElectronic supplementary information (ESI) available. CCDC 982947 (1)-982949 (3). For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c4ce01207k

Two low-dimensional oxime-containing Schiff base copper( i / ii ) complexes with iodine-copper cluster [Cu 2 I 4 ] 2− bridges, namely, {[Cu II 4 I 3 (pop) 4 ] 2 (Cu I 2 I 4 )}·(CH 3 CN) 2 ·H 2 O ( 2 ) and [Cu II 4 I 2 (pop) 4 (Cu I 2 I 4 )·(CH 3 CN)] n ( 3 ) (Hpop = 2-(hydroxyimino)- N ′-[1-(2-yridyl)ethylidene]propanehydrazone), have been synthesized from the reaction of [2 × 2] grid-like compound {[Cu II I(pop)] 4 } 2 ·4H 2 O ( 1 ) with equivalent Cu I 2 I 2 (iodine-copper clusters) under solvothermal conditions and characterized by elemental analysis (EA), infrared spectroscopy (IR), thermogravimetric analysis (TGA), and X-ray single-crystal/powder diffraction. The results show that 2 is a 0-D discrete structure from an assembly of one [Cu 2 I 4 ] 2− unit and two [2 × 2] molecular grids ( 1 ) via μ 3 -I atoms coordinating to Cu I /Cu II atoms. However, compound 3 presents a 1-D wave-like chain, which is constructed by coordination of μ 2 -I atoms from [Cu I 2 I 4 ] 2− units with Cu II atoms in [2 × 2] molecular grids ( 1 ). Moreover, catalytic experiments demonstrated that compounds 2 and 3 have promising visible-light-driven catalytic activity in degrading various organic dyes. Two 2-D oxime-containing Schiff base copper( i / ii ) complexes with iodine-copper cluster [Cu 2 I 4 ] 2− bridges have been prepared, showing prominent catalytic activity towards photodegradation of organic dyes under visible-light illumination.