Effects of solvent systems on two silver coordination complexes: From discrete structure to 2D sheet

• Published in: Journal of molecular structure 2014-02, Vol.1059, p.81-86
• Main Authors: Wang, Dan-Feng, Wang, Zhan-Hui, Lu, Bo-Wei, Chen, Shu-Fen, Zhang, Ting, Huang, Rong-Bin, Zheng, Lan-Sun
• Format: Article
• Language: English
• Subjects: 3-Nitro-1,2-benzenedicarboxylic acid; Ag⋯Ag interaction; Chain branching; Chains; Effects of solvent systems; Methyl-pyrazine ligand; Molecular structure; Photoluminescence; Self assembly; Silver; Silver(I); Solvents; Stands; Thermogravimetric analysis
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2013.11.033

[Display omitted] •Two silver(I) CCs of methylpyrazine were synthesized and characterized.•The structure of complex 1 exhibits a 1D-63-silver-ring formed by the Ag4 units.•The Ag8 units of complex 2 repeat to form a 1D silver chain.•The photoluminescence behaviors of the compounds were discussed. Two mixed-ligand silver(I) coordination complexes (CCs), [Ag4(mpyz)(npt)2·(H2O)2]n (1) and [Ag4(mpyz) (npt)2]n (2) were synthesized with reactions of methyl-pyrazine(mpyz) and 3-nitro-1,2-benzenedicarboxylic acid (H2npt) with silver nitrate in different solvent systems and were structurally characterized by single-crystal X-ray crystallography. Structural differences of CCs are due to the effects of solvent systems and the intricacy of the self-assembly process for these systems. For 1, the Ag4 unit which is like Y letter which stand upside and down and repeat to form a 1D-63-silver-ring which shares Ag1 and Ag2 only with npt ligands. The eight Ag ions of complex 2 are in a shape like the branches of a tree which repeat to form a 1D silver chain. Effects of solvents on the structures, as well as the intricacy of the self-assembly process were discussed. The photoluminescence, infrared spectroscopy (IR) and thermogravimetric analyses (TGA) behaviors of the compounds were also discussed.