Effect of different carboxylates on two Ag(I) coordination polymers with 2,5-dimethylpyrazine ligand

• Two Ag(I) complexes have been synthesized.
• The argentophilicity interaction was existed in the complexes.
• They were used for IR spectroscopy, photoluminescent and powder X-ray diffraction.
• Complexes 1 and 2 exhibit fluorescence emissions at 519 nm and 425 nm.

Two new metal–organic framework namely, [Ag3(dmpyz)1.5(btc)]n[Ag3(dmpyz)1.5(btc)]n (1), and [Ag2(dmpyz)(pta)]n[Ag2(dmpyz)(pta)]n (2), have been synthesized and structurally characterized. Compound 1 is a 3D structure incorporating μ5-(η1,η1):(η1,η1):(η1,η1)μ5-(η1,η1):(η1,η1):(η1,η1) btc and μ2-N1,N1,μ2-N2,N3 dmpyz ligands. In compound 2, the μ5-η1:η2:η3:η1μ5-η1:η2:η3:η1 pta and the dmpyz ligands link the [Ag4O2Ag4O2] units into a 2D structure. It is noteworthy that the Ag⋯Ag interactions were observed in the two coordination polymers. The results show that the structural diversity of the polymers is mainly attributed to the usage of diverse ancillary carboxylate ligands. The thermal stabilities and photoluminescence behaviors were addressed.

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