Inorganic Chemistry, Vol.58, No.9, 5646-5653, 2019
Anion-Induced Structural Diversity of Zn and Cd Coordination Polymers Based on Bis-9,10-(pyridine-4-yl)-anthracene, Their Luminescent Properties, and Highly Efficient Sensing of Nitro Derivatives and Herbicides
Luminescent coordination polymers (CPs) of Zn(2+)or Cd2+ and bis-9,10-(pyridine-4-yl)-anthracene (BA) show different 1D and 2D topologies depending on the anion used in the precursor. Compounds {[Zn(mu(2)-BA)(MeOH)(2)(p-Tos)(2)]}(n) (1) and {[Zn(mu(2)-BA)(MeOH)(2)(CF3CO2)(2)]}(n) (2) form linear structures and {BA@ [Zn(mu(2)-BA)-(MeOH)(2)(H2O)(2)](CF3SO3)(2)}(n) (3) featuring intercalation of uncoordinated BA molecules into linear ribbons. Cd-based CPs {[Cd(mu(2)-BA)(2)(ClO4)(2)]center dot n(DCM)}(n) (4) and {[Cd(mu(2)-BA)(MeOH)(2)(Dioxane)(eta(2)-SiF6)]center dot mDioxane}(n )(5) form porous structures with 2D lattices. All complexes exhibit strong blue emission in the solid state with average lifetimes between 8 and 13 ns. The emission of compound 4 is sensitive to the presence of nitro aromatics, simazine, and trichloroanisole (TCA) and demonstrates nonlinear Stern-Volmer quenching kinetics. Limits of detection (LOD) of 15 and 16 ppb for picric acid and TCA were achieved, respectively.