Anion-Templated Self-Assembly of Silver(I)Frameworks Bridged by μ-,μ3-,μ4-1,2,4,5-Tetrazine

摘要

The formation of Ag(I)-l,2,4,5-tetrazines(ttz)based coordination polymers via the Ag-N coordination and anion-πi interactions is described.Coordination-driven self-assembly is a key step to construct coordination polymers,and ttz,an electron-deficient aromatic ring compound,forms interesting anion-n interactions.In this study,a series of silver salts,AgX [X = BF4,PF6 and CF3SO3(OTf)],is introduced to determine the influence of shape and size of anions on the formation of coordination polymers,{[Ag(ttz)](BF4)}n(1),{[Ag2(ttz)3](PF6)2}n(2)and {[Ag2(ttz)3(OTf)](OTf)}n(3).It shows different types of channels in polymers and the coordination modes of ttz(μ,μ3,and μ4).The structure of coordination polymers and the influence of anion-π interactions are revealed by single crystal X-ray diffraction.In particular,3 shows not only the anion-π interaction but also the coordination between the anion and Ag(I)which contributes to the unique framework compared to 1 and 2.