Syntheses, IR spectra, thermal analyses, crystal structures, luminescence properties and DFT calculations of two silver–saccharinato complexes with 2-(dimethylaminomethyl)-3-hydroxypyridine and N-(2-aminoethyl)pyrrolidine

Abstract

Two new silver(I)–saccharinato (sac) complexes, [Ag(sac)(dmamhpy)] ( 1), [Ag 2(sac) 2(aeprd) 2] ( 2), (dmamhpy=2-(dimethylaminomethyl)-3-hydroxypyridine and aeprd= N-(2-aminoethyl)pyrrolidine, have been prepared and characterized by elemental analysis, IR spectroscopy, thermal analysis and single crystal X-ray diffraction. X-ray diffraction analyses reveal that complexes 1 and 2 have a dimeric structure containing three-coordinate silver(I) ions with a distorted T-shaped coordination of AgN 3. The dimeric structure of complex 1 is achieved by aromatic π⋯π stacking interactions, while the dimeric structure of complex 2 was governed by ligand unsupported Ag⋯Ag interaction with Ag–Ag contact of 3.1444(3) Å. The dimeric units are further linked by hydrogen bonds and C–H⋯π interactions into a three-dimensional supramolecular network so that the structure of 1 has solvent accessible voids with a volume of 132.1 Å 3. IR spectra and thermal analysis data for 1 and 2 are in agreement with the crystal structures. Complex 2 displays intense luminescence with emission maximum at 373 nm upon excitation at 210 nm. On the basis of experiment, both complexes were calculated by DFT-B3LYP/3-21G in gaussian 03.