An unprecedented binodal (4,10)-connected metal-organic framework based on pentanuclear cobalt(II) clusters

A three-dimensional Co(II) metal-organic framework {[Co5(btec)2(btx)(μ3-OH)2(H2O)2]·2H2O}n (1) (H4btec = 1,2,4,5-benzenetetracarboxylatic acid, btx = 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene) containing rare pentanuclear Co(II)-clusters has been hydrothermally synthesized and structurally characterized, which shows an unusual binodal (4,10)-connected topology. The fluorescence property and catalytic activity of the complex for degradation of methyl orange dye in Fenton process were investigated.