Construction of a 3D luminescent cadmium(II) network with an unusual deprotonated 1,3-imidazolidine-2-thione ligand

A novel three-dimensional (3D) polymer [Cd(SC3H5N2)2]n (SC3H5N2 = deprotonated 1,3-imidazolidine-2-thione) (1) was synthesized. The deprotonated 1,3-imidazolidine-2-thione ligand has been found at cadmium for the first time. The single-crystal X-ray diffraction shows that the deprotonated 1,3-imidazolidine-2-thione ligand contributes greatly to the formation of the 3D framework and the helical structure. Compound 1 exhibits blue fluorescence at 494 nm in the solid state upon excitation at 372 nm.