3 years ago

Syntheses, structures, and properties of four novel Ag(I) coordination polymers based on 2,6-dimethylpyrazine and benzene dicarboxylates

Syntheses, structures, and properties of four novel Ag(I) coordination polymers based on 2,6-dimethylpyrazine and benzene dicarboxylates
Four silver(I) coordination polymers based on 2,6-dimethylpyrazine(dmpz), {Ag2(dmpz)(L1)}n (1), {Ag2(dmpz)(L2)}n (2), {Ag2(dmpz)(L3)0.5·H2O}n (3) and {Ag6(dmpz)6(L4)2·2H2O}n (4) (H2L1 =5-Nitroisophthalic acid, H2L2 =3-Nitrophthalic acid, H4L3 =Pyromellitic acid, H2L4 =5-Sulfoisophthalic acid), were synthesized under the ammoniacal condition in mixed solvents and characterized by elemental analyses, IR spectra and single-crystal X-ray diffraction. 1 contains rhombic Ag4 unit, but 4 exhibits Zigzag Ag4 unit, both with 2D double layer architecture. In 2, L2 anions link Ag pairs into 1D corrugated chains, which are further connected by dmpz ligand into 2D 44-sql network. 3 possess 3D supramolecular framework resulting from AgO and AgN interaction and Zigzag Ag4 units. AgAg interactions exist in four coordination polymers. Benzene dicarboxylates and pyrazine ligands play vital roles in formation of the multiple architectures. Photoluminescence and thermogravimetry of the complexes were also measured.

Publisher URL: www.sciencedirect.com/science

DOI: S1387700317306883

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