Synthesis, crystal structure and photophysical properties of bis[2,6-difluoro-3-(pyriam-2-yl)pyridine-κN](trifluoromethanesulfonato-κ O)silver(I)

초록

In the title compound, [Ag(CF3SO3)(C10H6F2N2)(2)], the Ag-I centre adopts a highly distorted trigonal-planar coordination environment resulting from its coordination by one O atom of the trifluoromethanesulfonate anion and the pyridine N atoms of two crystallographically independent 2',6'-difluoro-2,3'-bipyridine ligands, which display very similar conformations to one another. Pairwise Ag center dot center dot center dot O-SO2CF3- [Ag center dot center dot center dot O = 2.8314 (14) angstrom] interactions and intermolecular C-H center dot center dot center dot O interactions between inversion-related units lead to the formation of an eight-membered cyclic dimer in which the silver atoms are separated by 6.2152 (3) angstrom. In the crystal, the dimers are linked through C-H center dot center dot center dot O hydrogen bonds, halogen center dot center dot center dot pi and weak pi-pi stacking interactions, resulting in the formation of a three-dimensional supramolecular network. The title compound exhibits a strong and broad emission band from 400 nm to 550 nm in solution and its photoluminescence quantum efficiency is estimated to be ca 0.2, indicating that the title compound could have applications as an emitting material in organic light-emitting diodes (OLEDs).

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