| A series of coordination polymers based on Ag···Ag interactions, namely,[Ag2（hpyb）0.5（L1）0.5（NO3）]·H2O（1）, [Ag4（hpyb）（HL2）（NO3）2]·2H2O（2）,[Ag3（hpyb）0.5（L3）（NO3）]（3）, [Ag6（hpyb）（L4）2（NO3）]·NO3·2H2O（4）,[Ag5（hpyb）0.5（L5）2（NO3）]·H2O（5）, {Ag4（hpyb）[L6（CH3）2]2}（6）,{Ag6（hpyb）（HL7）2[L7（CH3）]}（7） and [Ag3（hpyb）0.5（HL8）]·H2O（8）（hpyb =hexakis[2-（1H-pyrazol-3-yl）pyridine-ylmethy1]benzene, H2L1 = p-phthalic acid,H3L2 = 1,2,3-benzenetricarboxylic acid, H2L3 = cis-2-butenedioic acid, H2L4 =2,3-pyridinedicarboxylic acid, H2L5 = m-phthalic acid, H4L6 =1,2,4,5-benzenetetracarboxylic acid, H3L7 = 1,2,4-benzenetricarboxylic acid and H4L8 = 4,4′-oxydiphthalic acid） have been synthesized. For compounds 1-4, the polycarboxylate anions bridge multinuclear AgI units to form 1D chains,respectively. The chains are extended by π-π interactions into a 2D supramolecular layer for compound 3, and 3D supramolecular architectures for compounds 1, 2 and 4.Compound 5 displays a 3D（4,8）-connected（34·42）（34·412·58·64）2 framework.Compounds 6-8 exhibit 2D layers, where the layers of 6 and 8 are further linked byπ-π interactions to yield 3D supramolecular architectures. In the solid state, the fluorescence properties of compounds 1-8 have been investigated.Scheme 1. The structures of hpyb ligand and the polycarboxylate ligands. |
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