| Popis: |
Gold(I)-polyoxometalate hybrid complexes 1-4 ((PPh3AuMeCN)xH4xSiW12O40, x = 1-4) were synthesized and characterized. The structure of the primary gold(I)- polyoxometalate 1 (x = 1) was fully ascertained by XRD, FTIR, 31 P and 29 Si magic-angle spinning (MAS) NMR, mass spectroscopy, and SEM-energy dispersive X-ray spectros- copy (EDX) techniques. Moreover, this complex exhibited better catalytic activity and selectivity compared with standard, homogeneous, gold catalysts in the new re- arrangement of propargylic gem-diesters. Polyoxometalates (POMs) are oxygen-bridged, anionic, metal clusters with unique structural characteristics and a wide diver- sity in structures. The properties lead to various applications in different fields, especially in catalysis, medicine, biology, elec- trochromism, magnetism, and material science. (1) Recent years have thus witnessed the development of POM-based molecu- lar and composite materials. (2) |
