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Title: Reduction-Triggered Self-Assembly of Nanoscale Molybdenum Oxide Molecular Clusters

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.6b05882· OSTI ID:1324096
 [1];  [2];  [3];  [1];  [1];  [3];  [4];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Inst. Max Von Laue Paul Langevin, Grenoble (France)

The understanding of the formation mechanism of giant molecular clusters is an essential requirement for rational design and synthesis of cluster-based nano-materials with required morphologies and functionalities. Here, typical synthetic reactions of a 2.9 nm spherical molybdenum oxide cluster, {Mo132} (Formula: [MoVI72MoV60O372(CH3COO)30(H2O)72]42-) with systematically varied reaction parameters have been fully explored for the morphologies and concentration of products, reduction of metal centers, and chemical environments of organic ligands. The growth of these clusters shows a typical sigmoid curve, suggesting a general multi-step self-assembly mechanism for the formation of giant molecular clusters. The reaction starts with a lag phase period when partial MoVI centers of molybdate precursors are reduced to form {MoV2(acetate)} structures under the coordination effect of the acetate groups. Once the concentration of {MoV2(acetate)} reaches a critical value, it triggers the co-assembly of MoV and MoVI species into the giant clusters.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725; AC02-06CH11357
OSTI ID:
1324096
Alternate ID(s):
OSTI ID: 1368099
Journal Information:
Journal of the American Chemical Society, Vol. 138, Issue 33; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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{Nb 288 O 768 (OH) 48 (CO 3 ) 12 }: A Macromolecular Polyoxometalate with Close to 300 Niobium Atoms journal June 2018
Unprecedented Halide‐Ion Binding and Catalytic Activity of Nanoscale Anionic Metal Oxide Clusters journal July 2019
Poly(ethylene glycol) nanocomposites of sub-nanometer metal oxide clusters for dynamic semi-solid proton conductive electrolytes journal January 2019
{Nb 288 O 768 (OH) 48 (CO 3 ) 12 }: A Macromolecular Polyoxometalate with Close to 300 Niobium Atoms journal June 2018
Improved peroxidase-mimic property: Sustainable, high-efficiency interfacial catalysis with H2O2 on the surface of vesicles of hexavanadate-organic hybrid surfactants journal February 2018
Synthesis of polyoxometalate clusters using carbohydrates as reducing agents leads to isomer-selection journal January 2019
Scattering functions of carved-ellipsoid-shaped particles text January 2019