A novel one-dimensional mixed ligands silver(I) coordination polymer containing two different chains

A mixed-ligand coordination polymer (CP) of the formula {[Ag3(bmimb)2 (ndca)1.5]·H2O}n (1) (where bmimb = 1,4-bis(2-methylimidazol-1-ylmethyl)benzene and H2ndca = naphthalene-1,4-dicarboxylic acid) was synthesized by reaction of Ag2O and bmimb ligand with H2ndca under the ammoniacal condition. It has been structurally characterized by element analysis, IR and X-ray single-crystal diffraction. The bmimb acts as bidentate μ2-N,N′ ligand, and the ndca ligand adopts two different coordination modes in 1, which are μ4-η1:η1:η1:η1 and μ2-η1:η0:η1:η0, respectively. Coordination of Ag(I) ions with bmimb and ndca ligands produces two different 1D chains, which is attributed to the different coordination modes of the ndca ligand, indicating the ndca ligand plays an important role in the formation of the diverse 1D chains. The complex 1 exhibits photoluminescent emission in the solid state at room temperature.

► A novel silver(I) coordination polymer was synthesized and characterized.
► Coexistent two kinds of 1D chain were observed in this silver(I) coordination polymer.
► The different coordination modes of the ndca ligand play an important role in the formation of the diverse 1D chains.
► Its photoluminescent property was also investigated.