To investigate the influence of POM species, temperature and counterions on the structures of POM-MOFs containing Cu-tda second building units (SBUs), six new complexes with various dimensionalities, e.g. three dimensional (3D) [Cu(H2tda)(H2O)2]4[SiW12O40]·12H2O (1), two dimensional (2D) [Cu2(H2tda)2(H2O)3]·[Cu(H2tda)(H2O)2]·[PMo12O40]·5H2O (2), H-bond 2D [Cu(H2tda)(H2O)2]3·[PMo12O40]·[Cu(Htda)(H2O)3]·8H2O (3), one dimensional (1D) [Cu2(H2tda)2(H2O)4]2·[Cu2(tda)2(H2O)4]·[HPW12O40]·5H2O (4), 1D [Cu2(H2tda)2(H2O)4][SiW12O40]·(TMA)2·3H2O (5), and zero dimensional (0D) [Cu(H2tda)(H2O)3][SiW12O40]·(TMA)3·H2O (6), were isolated depending on the reaction conditions. It is observed that the POM species, temperature and counterions exhibit an essential effect on the structures, which results in the formation of various dimensional POM-MOF complexes 1–6. In addition, photocatalytic degradation of RhB by complexes 1, 5 and 6 under UV irradiation was also investigated.
