Abstract
Two enantiomerically pure chiral POM-based compounds, [(CH 3) 2NH 2] 10[Zr(PW 11O 39) 2] · 10H 2O (Left- 1, L -1 for short and Right- 1, R -1 for short) have been prepared by conventional aqueous solution method without a chiral auxiliary and structurally characterized by single-crystal X-ray diffraction. The structures of L- 1 and R- 1 contain two lacunary [PW 11O 39] 7− units, each acting as a tetra-dentate ligand, the Zr IV cation sandwiched between two [PW 11O 39] 7− anions is of eight coordination and occupies a distorted square antiprismatic geometry. The circular dichroism spectra confirmed the occurrence of spontaneous resolution and the enantiomeric nature of L- 1 and R- 1. Cyclic voltammetric experiment for 1 represents two redox peaks corresponding to the redox processes of [PW 11O 39] 7− in the potential range from −1000 to 1000 mV.
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