A new organic–inorganic hybrid
based on a Nb/W mixed-addendum
polyoxometalate with the formula H14[(Co(H2O)3)2(C10H8N2)4(P4W30Nb6O123)]·4(C10H8N2)·8H2O (Co-POM) has been synthesized by the solvothermal method
and characterized by single-crystal X-ray diffraction (XRD), powder
X-ray diffraction (PXRD), elemental analysis, FTIR spectroscopy, UV–vis
absorption spectrum, and thermogravimetric analysis (TGA). Importantly,
visible-light-absorption peaks around 525 nm for Co-POM indicated that this material should have potential in
visible-light-induced organic reactions. Herein, we disclosed visible-light-promoted
phosphorylation of N-aryl-tetrahydroisoquinoline
using Co-POM as an efficient heterogeneous
photocatalyst. In this procedure, diverse phosphorus reagents are
compatible at room temperature and in an O2 atmosphere,
giving the corresponding products in good to excellent yields (up
to 97%). Simultaneously, this heterogeneous photocatalyst can be recycled
up to ten times with a negligible decrease in yield, showing outstanding
sustainability and recyclability.
Four new transition metal-containing Nb/W Mixed-addendum POMs trimers with the formula of H19[M4(H2O)X(P2W15Nb3O62)3]·m(HCOOH)·nH2O (M = Cu, x = 15, m = 0, n = 21, Cu-POM ; M = Co,...
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