Reduction-Triggered Self-Assembly of Nanoscale Molybdenum Oxide Molecular Clusters
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- 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
Web of Science
Similar Records
Mechanistic Insights on C-O and C-C Bond Activation and Hydrogen Insertion during Acetic Acid Hydrogenation Catalyzed by Ruthenium Clusters in Aqueous Medium
GMC Collisions as Triggers of Star Formation. III. Density and Magnetically Regulated Star Formation