A novel 3D silver(I) supramolecular framework assembled from hybrid ligands incorporating Ag···C interactions

A novel silver(I) complex with mixed 2-amino-4-methylpyrimidine (mapym) and naphthalene-2,6-dicarboxylic acid (H2npd), {[Ag(mapym)(npd)0.5·H2O]}n (1), has been synthesized and characterized by elemental analysis, IR spectroscopy and single crystal X-ray diffraction. In 1, Ag(I) ions exhibit a T-shaped coordination geometry and are doubly clamped by two npd anions to form [Ag2C2O4] units incorporating a short Ag···Ag contact of 2.8192(15) Å. The coordination bonds link Ag(I) ions and npd ligands to form one-dimensional (1D) fish-bone chains which are extended into a two-dimensional (2D) layer by inter-chain hydrogen bonds. Interestingly, Ag···Cnpd(η2) interactions of av. 2.88 Å combine inter-layer hydrogen bonds and π···π stacking interactions to give 1 a three-dimensional (3D) supramolecular framework. The photoluminescence properties of 1 were investigated in the solid state at room temperature.