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 [Ag-2(apym)(1.5)(nipa)center dot H2O](n) (1) and [Ag-2(dmapym)(2)(nipa)](n) (2) were synthesized and characterized by single-crystal X-ray analysis (apym = 2-aminopyrimidine, dmapym = 2-amino-4,6-dimethylprimidine, H(2)nipa = 5-nitroisophthalic acid). Complex 1 possesses a one-dimensional (1D) structure built from rhombic [Ag-4(apym)(2)(nipa)(2)] second building units (SBUs). The uncoordinated O-nitro is involved in the significant lone-pair (Ip)center dot center dot center dot pi interaction with the benzene ring of nipa. Complex 2 possesses a two-dimensional (20) structure in which dmapym ligands show two different coordination modes, monodentate and bidentate, respectively. Moreover, 2 shows abundant nonvalent interactions, such as Ip(O-carboxyl)center dot center dot center dot pi, pi center dot center dot center dot pi, C-H center dot center dot center dot pi 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. (C) 2010 Elsevier B.V. All rights reserved.National Natural Science Foundation of China [20721001]; 973 Project [2007CB815301]; MSTC ; National Science Fund of China for Fostering Talents in Basic Science [J0630429