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Title: New Uranyl Open Framework and Sheet Compounds Formed via In-Situ Protonation of Piperazine by Phosphorous Acid

Journal Article · · Minerals
DOI:https://doi.org/10.3390/min8110497· OSTI ID:1492676
 [1]; ORCiD logo [2];  [3]
  1. Univ. of Notre Dame, IN (United States). Dept. of Civil Engineering and Geological Sciences; Univ. of Notre Dame, IN (United States). Dept. of Chemistry and Biochemistry; Creighton Univ., Omaha, NB (United States). Dept. of Chemistry
  2. Univ. of Notre Dame, IN (United States). Dept. of Civil Engineering and Geological Sciences; Univ. of Notre Dame, IN (United States). Dept. of Chemistry and Biochemistry; Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Univ. of Notre Dame, IN (United States). Dept. of Civil Engineering and Geological Sciences; Univ. of Notre Dame, IN (United States). Dept. of Chemistry and Biochemistry; Florida State Univ., Tallahassee, FL (United States). Dept. of Chemistry
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Two new uranyl compounds were hydrothermally synthesized employing piperazine as an organic templating agent. The piperazine was protonated in-situ by phosphorous acid, forming the piperazinium dication featured in these compounds. The two new structures presented here are a uranyl phosphite 2D sheet and a 3D uranyl mixed phosphite–phosphate network with cation occupied channels. Both included strong hydrogen bonding from the piperazinium cation to the uranyl phosphite or mixed phosphite–phosphate network. These two structures can be reliably formed through careful control of pH of the starting solution and the reaction duration. The piperazinium uranyl phosphite compound was the latest in a family of uranyl phosphites, and demonstrates the structural versatility of this combination. Finally, the mixed phosphite–phosphate compound builds on hydrothermal redox chemistry, illustrating the variety of compounds that can be isolated by exploiting in-situ redox processes to elucidate new uranium structure types.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Actinide Science & Technology (CAST). Materials Science of Actinides (MSA); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
89233218CNA000001; SC0001089; SC0016568
OSTI ID:
1492676
Report Number(s):
LA-UR-18-28721; MBSIBI
Journal Information:
Minerals, Vol. 8, Issue 11; ISSN 2075-163X
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

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Cited By (1)

Uranyl Coordination Compounds with Alkaline Earth Metals and Crotonate Ligands journal August 2019

Linked Research (2)

Figures / Tables (13)

Table 1(p. 5)table Table 1
Table 2(p. 6)table Table 2
Table 3(p. 6)table Table 3
Table 4(p. 7)table Table 4
Table 5(p. 8)table Table 5
Figure 1(p. 9)figure Figure 1
Figure 2(p. 9)figure Figure 2
Table 6(p. 11)table Table 6
Figure 3(p. 12)figure Figure 3
Figure 4(p. 13)figure Figure 4
Figure A1(p. 14)figure Figure A1
Table A1(p. 15)table Table A1
Table A2(p. 15)table Table A2

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
uranium(VI)
phosphite
piperazinium
hydrothermal redox
crystal structures