Three Distinct Silver(I) Coordination Polymers: Bridging-Ligand Directed Syntheses, Crystal Structures, Luminescence, and Nitrobenzene Sensing Properties

摘要

Three distinct Ag-I-DMAP [DMAP = 4-(dimethylamino)pyridine] coordination polymers [Ag2I2(DMAP)(2)](n) (1), [Ag-2(CN)(2)(DMAP)(2.5)center dot DMAP](n) (2), and [Ag(SCN)(DMAP)](n) (3) were constructed by monatomic I-, diatomic CN-, and triatomic SCN- bridges, respectively. 1-3 were determined by FT-IR spectroscopy, elemental analyses, TGA, powder and single-crystal X-ray diffraction. 1 exhibits a 1D wavelike chain structure, sustained by 3-connected I- bridges, whereas 2 shows a unique 1D single- and double-strand alternating chain, supported by 3-connected CN- bridges. Compound 3 has a 2D 3-connected network architecture, fabricated by 3-connected SCN- bridges, and exhibits a (4 center dot 8(2)) topology. The luminescence and nitrobenzene sensing properties of 1-3 were explored in 2-propanol suspensions, which revealed that compounds 1-3 exhibit DMAP originated luminescence emissions and are highly sensitive for nitrobenzene detection.