Influence of aminopyrimidyl derivatives on the supramolecular architectures and abundant nonvalent interactions of silver 5-nitroisophthalate coordination polymers

Two 5-nitroisophthalate silver(I) coordination polymers with 2-aminopyrimidyl derivatives, namely [Ag2(apym)1.5(nipa)·H2O]n (1) and [Ag2(dmapym)2(nipa)]n (2) were synthesized and characterized by single-crystal X-ray analysis (apym = 2-aminopyrimidine, dmapym = 2-amino-4,6-dimethylprimidine, H2nipa = 5-nitroisophthalic acid). Complex 1 possesses a one-dimensional (1D) structure built from rhombic [Ag4(apym)2(nipa)2] second building units (SBUs). The uncoordinated Onitro is involved in the significant lone-pair (lp)⋯π interaction with the benzene ring of nipa. Complex 2 possesses a two-dimensional (2D) structure in which dmapym ligands show two different coordination modes, monodentate and bidentate, respectively. Moreover, 2 shows abundant nonvalent interactions, such as lp(Ocarboxyl)⋯π, π⋯π, C–H⋯π interactions and hydrogen-bonding simultaneously. 1 and 2 also exhibit diverse structure motifs due to the effects of substituent methyl groups. The photoluminescence properties of these complexes also were examined.