Abstract
In this article, two new tetra-Zr(iv)-substituted sandwich-type Keggin polyoxometalates functionalized by chiral d-tartaric acid and glycolic acid, K 2 H 10 [Zr 4 (H 2 O) 2 (μ-OH)(μ 3 -O) 2 (d-tartH)(GeW 10 O 37 ) 2 ]·27H 2 O (1, D-tartH 4 = d-tartaric acid) and K 2 H 10 [Zr 4 (H 2 O) 2 (μ 3 -O) 2 (gly) 2 (GeW 10 O 37 ) 2 ]·32H 2 O (2, glyH 2 = glycolic acid), have been synthesized under hydrothermal conditions and characterized by FT-IR spectra, elemental analysis, single-crystal X-ray structure analysis, powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), ultraviolet-visible absorption spectroscopy (UV-vis) and cyclic voltammetry (CV). The structure analysis reveals that both 1 and 2 contain a [Zr 4 (H 2 O) 2 (μ 3 -O) 2 (GeW 10 O 37 ) 2 ] cluster. UV-vis spectra indicate that both compounds are a wide-gap semiconductor. In addition, compound 1 is a chiral Zr(iv)-substituted sandwich-type Keggin cluster because the d-tartH ligand is chiral and the Flack divisor of 1 is 0.00, showing non-linear optical properties. The cyclic voltammograms indicate that compounds 1 and 2 have good electrocatalytic activity in the reduction of H 2 O 2 .
| Original language | English |
|---|---|
| Pages (from-to) | 876-883 |
| Number of pages | 8 |
| Journal | CrystEngComm |
| Volume | 21 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2019 |