Journal
CHEMICAL COMMUNICATIONS
Volume 57, Issue 40, Pages 4954-4957Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1cc00867f
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Funding
- Office of Science, Office of Basic Energy Sciences, of the U.S. DOE [DE-AC02-05CH11231]
- U.S. Department of Energy/National Nuclear Security Administration (DOE/NNSA) Nuclear Science and Security Consortium (NSSC) Graduate Student Program [DE-NA0003180, DE-NA0000979]
- Advanced Light Source, a U.S. DOE Office of Science User Facility [DE-AC02-05CH11231]
- NIH [S10-RR027172, S10OD024998]
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Four homoleptic thorium(iv) amidate complexes were synthesized as single-source molecular precursors for thorium dioxide. The substituents on the amidate ligands significantly impacted their volatility and thermal stability, with ThO2 samples formed from C-alkyl amidates showing higher purity and crystallinity than those formed from C-aryl amidates. These complexes decomposed via alkene elimination to give ThO2 without the need for a secondary oxygen source.
We report the synthesis of four homoleptic thorium(iv) amidate complexes as single-source molecular precursors for thorium dioxide. Each can be sublimed at atmospheric pressure, with the substituents on the amidate ligands significantly impacting their volatility and thermal stability. These complexes decompose via alkene elimination to give ThO2 without need for a secondary oxygen source. ThO2 samples formed from pyrolysis of C-alkyl amidates were found to have higher purity and crystallinity than ThO2 samples formed from C-aryl amidates.
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