Anion‐directed Silver(I) Coordination Assemblies Based on 1‐(2‐Pyridyl)‐2‐(4‐pyridyl)‐1,2,4‐triazolewith Diverse Supramolecular Networks and Dichromate Removal Capabilities

A series of silver(I) supramolecular complexes, namely, {[Ag(L 24 )](NO 3 )} n ( 1 ), [Ag 2 (L 24 )(NO 2 ) 2 ] n ( 2 ), and {[Ag 1.25 (L 24 )(DMF)](PF 6 ) 1.25 } n ( 3 ) were prepared by the reactions of 1‐(2‐pyridyl)‐2‐(4‐pyridyl)‐1,2,4‐triazole (L 24 ) and silver(I) salts with different anions (AgNO 3 , AgNO 2 , AgPF 6 ). Single‐crystal X‐ray diffraction indicates that 1 – 3 display diverse supramolecular networks. The structure of dinuclear complex 1 is composed of a six‐membered Ag 2 N 4 ring with the Ag ··· Ag distance of 4.4137(3) Å. In complex 2 , the adjacent Ag I centers are interlinked by L 24 ligands into a 1D chain, the adjacent of which are further extended by the bridged nitrites to construct a 2D coordination architecture. Complex 3 shows a 3D (3,4)‐connected framework, which is generated by the linkage of L 24 ligands. All complexes were characterized by IR spectra, elemental analysis, and powder X‐ray diffraction. Notably, a structural comparison of the complexes demonstrates that their structures are predominated by the nature of anions. Additionally, 1 and 2 show efficient dichromate (Cr 2 O 7 2– ) capture in water system, which can be ascribed to the anion‐exchange.