Three three-dimensional supramolecular networks formed by one-dimensional chains of Ag(I) and N,N′-di(3-pyridyl)succinamide via weak intermolecular interactions

• The [Ag(L)] chains are connected via weak interactions to form a 3D net of 1.
• The [Ag(L)] helical chains are linked by weak interactions to afford a 3D net of 2.
• Two [Ag(L)] chains are linked by the Ag⋯O interactions to yield a 3D net of 3.
• The results offer an insight into effects of weak interactions on the structures.

Reactions of N,N′-di(3-pyridyl)succinamide (L) with AgOTf, AgTFA and AgNO3 (OTf = triflate, TFA = trifluoroacetate) produced three coordination polymers {Ag(L)(OTf)·DMF·MeCN}n (1·DMF·MeCN), {Ag(L)(TFA)·2H2O}n (2·2H2O) and {[Ag(L)]2(NO3)2}n (3), respectively. In 1, two one-dimensional (1D) [Ag(L)] chains are joined by the Ag⋯Ag, π⋯π and hydrogen-bonding interactions to form a 1D double chain, which is further linked to other equivalent ones via the hydrogen bonding interactions to yield a three-dimensional (3D) structure. In 2, the 1D [Ag(L)] helical chains are connected by the Ag⋯O, π⋯π, CH⋯π and hydrogen-bonding interactions to afford a 3D framework. In 3, two kinds of 1D [Ag(L)] chains are linked by the Ag⋯O and hydrogen-bonding interactions to form a 3D structure. The luminescent properties of 1–3 along with L were also investigated.

Three coordination polymers derived from N,N′-di(3-pyridyl)succinamide (L) and AgOTf, AgTFA and AgNO3 were synthesized. The 1D [Ag(L)]n chains in these complexes are connected by the Ag⋯O, π⋯π, CH⋯π and hydrogen-bonding interactions to form three different 3D supramolecular frameworks.Figure optionsDownload as PowerPoint slide