New organically templated photoluminescence iodocuprates(I)

Two types of organic cyclic aliphatic diamine molecules piperazine (pip) and 1,3-bis(4-piperidyl)propane (bpp) were used, respectively, to react with an inorganic mixture of CuI and KI in the acidic CH3OH solutions under the solvothermal conditions, generating finally three new organically templated iodocuprates as 2-D layered [(Hpip)Cu3I4] 1, 1-D chained [tmpip][Cu2I4] 2 (tmpip=N,N,N′,N′-tetramethylpiperazinium) and dinuclear [H2bpp]2[Cu2I5] I·2H2O 3. Note that the templating agent tmpip2+ in compound 2 originated from the in situ N-alkylation reaction between the pip molecule and the methanol solvent. The photoluminescence analysis indicates that the title compounds emit the different lights: yellow for 1, blue for 2 and yellow–green for 3, respectively.

The solvothermal self-assemblies of CuI, KI and pip/bpp in acidic CH3OH solutions created three iodocuprates 2-D layered [(Hpip)Cu3I4] 1, 1-D chained [tmpip][Cu2I4] 2 and dinuclear [H2bpp]2[Cu2I5] I·2H2O 3.Figure optionsDownload as PowerPoint slideHighlights
► A new layered iodocuprate(I) with 20-membered rings was hydrothermally prepared.
► A simple approach to prepare the new organic templating agent was reported.
► Photoluminescence analysis indicates the emission for iodocuprate(I) is associated with the Cu···Cu interactions.