Abstract
Three new organic–inorganic hybrid compounds, namely [CuILp]2[W6O19]·H2O (1), [CuILp]3[W6O19]Cl (2) and [CuILp]2[W6O19]·2H2O (3) (Lp=α,α′-bis-[3-(2-pyridyl)pyrazol-1-yl]-1,4-dimethylbenzene) based on copper(I) ion, a neutral N-donor bichelate-bridging ligand (Lp) and a Lindqvist-type polyoxometalate (POM) [W6O19]2−, have been hydrothermally prepared under different synthetic conditions and structurally characterized by elemental analyses, IR spectra, TG analyses, powder X-ray diffraction (PXRD), and single-crystal X-ray diffraction analyses. Compounds 1 and 2 contain two different but topologically similar meso-helical chainlike coordination moieties. Compound 3 contains both left- and right-handed chiral “mobius strip” units. These cationic meso-helical chains and “mobius strip” units in compounds 1–3 are further combined with Lindqvist-type polyoxoanions to form 3-D supramolecular assemblies through extensive electrostatic forces and/or π–π interactions. The photo-luminescent properties of 1–3 have also been investigated, which are mainly attributed to the Lp ligand-centered emission.
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