Synthesis, crystal structures and photocatalytic properties of four silver(I) coordination polymers based on semirigid bis(pyrazole) and carboxylic acid co-ligands

摘要

Four Ag(I) coordination polymers, formulated as [Ag(L1)(tpa)(0.5)] (n) (1), {[Ag(L2)(ndc)(0.5)]center dot 0.5H(2)ndc} (n) (2), [Ag(L3)(0.5)(ndc)(0.5)] (n) (3) and {[Ag(L3)]center dot H(3)bptc} (n) (4) (L1 = 4,4'-bis(pyrazole-1-ylmethyl)-biphenyl, L2 = 4,4'-bis(3,5-dimethylpyrazol-1-ylmethyl)-biphenyl, L3 = 1,4-bis(3,5-dimethylpyrazol-1-ylmethyl)benzene, H(2)tpa = terephthalic acid, H(2)ndc = 2,6-naphthalenedicarboxylic acid, H(4)bptc = 3,3',4,4'-biphenyltetracarboxylic acid), have been hydrothermally synthesized and structurally characterized. Complex 1 features the rare binodal (4,4)-connected 2D 4,4L10 topological network with a point symbol of {3(2)center dot 4.6(2)center dot 7}(2){3(2)center dot 6(2)center dot 7(2)}. Complex 2 has a folded ladder-like chain structure, which is further extended into a 3D supramolecular network via O-H center dot center dot center dot O hydrogen bonding and pi center dot center dot center dot pi stacking interactions. Complexes 3 and 4 both possess 1D zigzag chain structures. Complex 3 is further extended into a binodal (3,4)-connected network with the point symbol of {4.8(4)center dot 10}{6(2)center dot 8(2)}(2) by Ag center dot center dot center dot O weak interactions, while complex 4 is further connected through O-H center dot center dot center dot O hydrogen bonding and pi center dot center dot center dot pi interactions to afford a 2D supramolecular structure. The photoluminescence spectra and photocatalytic properties of these complexes for degradation of methylene blue and methyl orange are reported.