In this article, three bisimidazole derivatives (1,4-bis(2-ethylimidazol-1-yl)butane, L1; 4,4′-di(1 H -imidazol-1-yl)-1,1′-biphenyl, L2′; and 1,3-bis(2-ethylimidazol-1-yl)propane, L3) were employed to solvothermally react with AgI in an acidic environment, creating three new 1-D chained iodoargentates [H(L1)][Ag _(5) I _(6) ]·DMF (DMF = N , N ′-dimethylformamide) 1 , [L2][Ag _(3) I _(5) ] (L2 ~(2+) = 4,4′-di(1 H -imidazol-1-ium)-1,1′-biphenyl) 2 , and [H _(2) (L3)][Ag _(2) I _(4) ] 3 . L2 ~(2+) in 2 originated from the in situ N-alkylation of L2′ with the CH _(3) OH solvent. X-ray single-crystal diffraction analysis reveals that (i) in 1 , Ag ~(+) and I ~(?) aggregate to form a 1-D tube-like iodoargentate, which exhibits the same topology as the carbon tube; (ii) the chain structure of the iodoargentate in 2 is based on a kind of trinuclear Ag–I cluster, which can be viewed as a segment of the classical cubic M _(4) I _(4) cluster; (iii) the chain structure of the iodoargentate in 3 is simple, which can be described as a linear arrangement of the AgI _(4) tetrahedra by sharing edges. The photoluminescence analysis reveals that at 77 K, (i) 1 and 2 emit strong yellow light with ms-grade photoluminescence lifetimes (5.460 ms for 1 , 6.931 ms for 2 ); (ii) 3 possesses photochromic luminescence properties. Upon excitation at 254 nm, it emits blue-green light, whereas upon excitation at 365 nm, it emits yellow light.
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