Abstract
Two Zn MOFs {[Zn4(OH)(tipe)2(btc)2]·(OH)·9H2O·DMF}n (1·(OH)·9H2O·DMF) and {[Zn(tipe)1/2(bpdc)]·H2O}n (2·H2O) (tipe = 1,1,2,2-tetrakis(imidazol-1-yl)phenyl)ethylene, btc = 1,3,5-benezenetricarboxylate, bpdc = 2,2′-biphenyldicarboxylate) were obtained using the hydrothermal method and characterized. MOF 1 exhibits the (3,4,4,6)-connected 3D topology with point symbol of (83)(44·82)(4·84·12)(42·89·102·122). MOF 2 shows the (4,4)-connected 3D topology with point symbol of (84·102)2(42·82·102). MOF 1 and 2 present the strong luminescence emission at 507 nm and 492 nm, respectively. The energy gap (Eg), valence band (Ev) and conduction band (Ec) data of MOF 1 and 2 were 2.31 and 2.17 eV, 2.37 and 2.54 eV, 0.06 and 0.37 eV, respectively. MOF 1 and 2 are good photocatalytic and sonocatalytic catalysts for degradation of methylene blue under visible light and ultrasound irradiation. The catalytic mechanism was proposed.
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