Syntheses, Structures, and Characterizations of Four New Silver(I) Sulfonate Coordination Polymers with Neutral Ligands

In this paper, four novel silver(I) sulfonate coordination polymers containing neutral ligands, namely, [Ag2L1(biim)2]·2H2O (1), AgL2(biim) (2), [Ag(HL3)(Pic)2]·H2O (3), and [Ag3(L3)(HL3)(4,4‘-bipy)3(H2O)2]·4H2O (4), have been synthesized
[L1 = 3-carboxy-4-hydroxybenzenesulfonate, L2 = p-aminobenzenesulfonate, H2L3 = p-hydroxybenzenesulfonic acid, biim =
1,1‘-(1,4-butanediyl)-bis(imidazole), Pic = β-picoline, 4,4‘-bipy = 4,4‘-bipyridine]. For compounds 1 and 2, Ag(I) cations are bridged
by biim ligands to form a one-dimensional (1D) “zigzag” chain, and L1 and L2 sulfonate ligands are not coordinated to the silver
cation. Compound 3 has a dimeric structure in which two silver cations are bridged by two HL3 ligands. For compound 4, L3 ligand
coordinates to a silver cation as a monodentate ligand, and Ag(I) cations are bridged by 4,4‘-bipy ligands to form a 1D chain.
Compound 1 contains water dimers, while compound 4 contains water trimers. Compounds 1−3 display room-temperature
photoluminescence.