Structural characterization of three organically modified Cd(II) compounds

Based on a strategy of introducing the inorganic SCN− group into CdX2-organoamine system, three organically modified Cd(II) compounds as 1-D [H2dmpip][CdCl3(SCN)] (dmpip = N,N´-Dimethylpiperazine) 1, 2-D [Cd(SCN)2(dach)] (dach = 1,4-Diazacycloheptane) 2 and mononuclear [CdI3(Hdach)] 3 were obtained in H2O/C2H5OH solutions under ambient conditions. X-ray single-crystal diffraction analysis revealed that compound 1 is diprotonated dmpip-templated chained cadmium-chloro thiocyanate, compound 2 is the first example of dach-extended layered cadmium-thiocyanato coordination polymer, and compound 3 is monoprotonated dach-coordinated mononuclear cadmium iodide. The photoluminescence analysis indicates that the title three compounds are the potential fluorescence materials.

By introducing inorganic anionic group SCN− into CdX2-organoamine system in H2O/C2H5OH solutions, three new organically modified Cd(II) compounds [H2dmpip][CdCl3(SCN)] 1, [Cd(SCN)2(dach)] 2 and [CdI3(Hdach)] 3 (dmpip = N,N'-Dimethylpiperazine, dach = 1,4-Diazacycloheptane) were obtained by room-temperature self-assemblies.Figure optionsDownload as PowerPoint slideHighlights
► This article is based on a simple strategy of incorporating inorganic SCN– group into CdX2-organoamine system.
► Three new organically modified Cd(II) complexes were synthesized under ambient conditions.
► The structural characterization of the first example of dach-extended coordination polymer was reported.
► The reason that dach could act as the different roles in the complex was analyzed.