Molecular Growth of a Core–Shell Polyoxometalate


  • We are grateful to Dr. Gordon Miller (Iowa State University) for granting access to X-ray facilities and Dr. Peter Müller (Massachusetts Institute of Technology) for helpful discussions on crystal structure refinement. Ames Laboratory is operated for the U.S. Department of Energy by Iowa State University under Contract No. DE-AC02-07CH11358.


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In a nutshell: A 4.3 nm core–shell aggregate of 16 polyoxotungstate building units (see picture of the W/Mn skeleton) delineates the upper limit for structural complexity in molecular metal oxide cluster chemistry to date. This structure is defined by a backbone network of dual Mn[BOND]O[DOUBLE BOND]W bridges; a retroanalysis of their formation suggests the importance of templation and kinetic control in the self-assembly of the {MnIII40WVI224} polyanion.