Anion-Controlled Assembly of Silver(I)/Aminobenzonitrile Compounds: Syntheses, Crystal Structures, and Photoluminescence Properties

Five coordination compounds (CCs) of the formulas {[Ag(m-abn)2]·NO3}n (1), {[Ag2(m-abn)6]·(ClO4)2} (2), {[Ag(o-abn)2]·NO3}n (3), [Ag(o-abn)2(NO2)]n (4), and {[Ag(o-abn)2]·PF6}n (5) (m-abn = 3-aminobenzonitrile, and o-abn = 2-aminobenzonitrile) were synthesized and structurally characterized by element analysis, IR, powder X-ray diffraction, and X-ray single-crystal diffraction. Structural analysis reveals that aminobenzonitrile acts as bidentate μ2-N,N′ or monodentate μ1-N ligands in 1–5. Complex 1 is a 1D chain comprised of C2-symmetric [Ag(m-abn)]2 14-membered rings. The uncoordinated NO3– anions interact with the 1D chain to form a resulting 2D supramolecular sheet through N–O···N hydrogen bond. Complex 2 is a discrete binuclear Ag(I) CC incorporating concurrent bidentate μ2-N,N′ and monodentate μ1-N m-abn ligands. The variation of anions from NO3– to ClO4– results in the dimensionalities of 1 and 2 decreasing from 1D to 0D. When using o-abn, complexes 3–5 are obtained as 1D chain with C2-symmetric [Ag...