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Title: Alkali metal yttrium neo-pentoxide double alkoxide precursors to alkali metal yttrium oxide nanomaterials

In this study, a series of alkali metal yttrium neo-pentoxide ([AY(ONep) 4]) compounds were developed as precursors to alkali yttrium oxide (AYO 2) nanomaterials. The reaction of yttrium amide ([Y(NR 2) 3] where R=Si(CH 3) 3) with four equivalents of H-ONep followed by addition of [A(NR 2)] (A=Li, Na, K) or A o (A o=Rb, Cs) led to the formation of a complex series of A nY(ONep) 3+n species, crystallographically identified as [Y 2Li 33-ONep)(μ 3-HONep)(μ-ONep) 5(ONep) 3(HONep) 2] (1), [YNa 23-ONep) 4(ONep)] 2 (2), {[Y 2K 33-ONep) 3(μ-ONep) 4(ONep) 2(ηξ-tol) 2][Y 4K 24-O)(μ 3-ONep) 8(ONep) 4]•η x-tol]} (3), [Y 4K 24-O)(μ 3-ONep) 8(ONep) 4] (3a), [Y 2Rb 34-ONep) 3(μ-ONep) 6] (4), and [Y 2Cs 46-O)(μ 3-ONep) 63-HONep) 2(ONep) 2x-tol) 4]•tol (5). Compounds 1–5 were investigated as single source precursors to AYOx nanomaterials following solvothermal routes (pyridine, 185 °C for 24h). The final products after thermal processing were found by powder X-ray diffraction experiments to be Y 2O 3 with variable sized particles based on transmission electron diffraction. Energy dispersive X-ray spectroscopy studies indicated that the heavier alkali metal species were present in the isolated nanomaterials.
Authors:
 [1] ;  [1] ;  [1] ;  [2]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Univ. of Hawaii, Honolulu, HI (United States)
Publication Date:
Report Number(s):
SAND-2016-1744J
Journal ID: ISSN 2365-6549; 619560
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Chemistry Select
Additional Journal Information:
Journal Volume: 1; Journal Issue: 3; Journal ID: ISSN 2365-6549
Publisher:
Wiley
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; alkoxides; yttrium; alkali metal; neo-pentoxide; nanomaterials
OSTI Identifier:
1249092