Interdigitated Architectures Assembled from α-metatungstates and Lanthanide-organic Complexes

  • Key Laboratory of Green Chemical Engineering and Technology of College of Heilongjiang Province, College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin 150040, China

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Two compounds represent the first examples of interdigitated architectures assembled from POMs and lanthanide-organic complexes have been synthesized.

The title compounds show a good electrocatalytic activity toward hydrogen peroxide molecules.

The IR, UV spectra, and elemental analysis of the title compounds were studied in details.


Two new compounds were constructed by isopolyanions and lanthanide-organic units, [Hdpdo]Ln(Hdpdo)2(H2O)6[H2W12O40]·nH2O (Ln = Ce and n = 17 for 1, Ln = Nd and n = 18 for 2, dpdo = 4,4'-dipyridine-N,N'-dioxide) were synthesized at room temperature and characterized by IR and UV spectra, elemental analysis and single-crystal X-ray diffraction analysis. Compounds 1 and 2 are isostructural, and in their stacking architectures there exist poly-pendant wave-like layers formed by discrete {Ln(Hdpdo)2(H2O)6[H2W12O40]}- fragments via π···π interactions, in which the [H2W12O40]6- (W12) clusters as pendants are orderly appended to wave crests, by covalent bonds between Ln cations of Ln(Hdpdo)2 and terminal oxygen atoms of W12. Adjacent layers mutually engage in a zipper-like pattern to result in a novel 3D interdigitated architecture, in which overhanging W12 clusters act as teeth. Furthermore, the electrochemical studies show that 1 has a good electrocatalytic activity toward reduction of hydrogen peroxide (H2O2) molecules.

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