(1)   Series of Ag(I) Coordination Complexes Derived from Aminopyrimidyl Ligands and Dicarboxylates: Syntheses, Crystal Structures, and Properties. Sun, Di; Zhang, Na; Huang, Rong-Bin; Zheng, Lan-Sun. Crystal Growth & Design DOI: 10.1021/cg100554u.

Abstract: A series of new metal–organic frameworks, namely, [Ag(mapym)(suc)_0.5·0.5H₂O]_n (1), [Ag₂(mapym)₂(glu)·1.5H₂O]_n (2), [Ag₂(mapym)₂(ipa)·2H₂O]_n (3), [Ag₂(mapym)₂(tpa)(H₂O)]_n (4), [Ag(dmapym)₂(ox)_0.5·H₂O] (5) and [Ag(dmapym)(bbdc)_0.5·0.5H₂O]_n (6) (mapym = 2-amino-4-methylpyrimidine, dmapym = 2-amino-4,6-dimethylpyrimidine, H₂suc = succinic acid, H₂glu = glutaric acid, H₂ipa = isophthalic acid, H₂tpa = terephthalic acid, H₂ox = oxalic acid, H₂bbdc = 4,4-bibenzenedicarboxylic acid) have been synthesized and structurally characterized. Complex 1 and 2 exhibit two-dimensional (2D) interpenetrated and double-sheet structures respectively. Complex 3 is a three-dimensional (3D) framework constructed through unusual 2D→3D parallel interpenetration of corrugated 2D 4⁴-sql net. Complex 5 is a 0-dimensional (0D) H-shaped molecule and the self-complementary N–H×××N hydrogen bonds incorporating R₄⁴(14) hydrogen bond motifs extend these molecules into a 3D supramolecular framework. Complex 4 and 6 are also 2D sheets constructed with the similar fashion to that of 1 and 2, but with aryl-dicarboxylate as bridge. The results show that the coordination geometry of Ag(I) ions and the configuration and coordination mode of dicarboxylates as well as the competition between steric and electronic effects of methyl groups on aminopyrimidyl ligands play crucial roles in determining the structure of the complexes. Additionally, results about IR spectra, thermogravimetric curves and photoluminescence spectra were addressed.