Journal
INORGANIC CHEMISTRY
Volume 56, Issue 14, Pages 7694-7706Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.7b00312
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [21671191, 21577144, 11405186]
- Major Resarch Plan Breeding and Transmutation of Nuclear Fuel in Advanced Nuclear Fission Energy System of the Natural Science Foundation of China [91426302, 91326202]
- Ministry of Industry and Information Technology of China [JCKY2016212A504]
- U.S. Department of Energy, Office of Basic Energy Sciences, Heavy Element Chemistry, at LBNL [DE-AC02-05CH11231]
Ask authors/readers for more resources
The reaction of uranyl nitrate with terephthalic acid (H2TP) under hydrothermal conditions in the presence of an organic base, 1,3-(4,4'-bispyridyl)propane (BPP) or 4,4'-bipyridine (BPY), provided four uranyl terephthalate compounds with different entangled structures by a pH-tuning method. [UO2(TP)(1.5)](H2BPP)(0.5)center dot 2H(2)O (1) obtained in a relatively acidic solution (final aqueous pH, 4.28) crystallizes in the form of a noninterpenetrated honeycomb-like two-dimensional network structure. An elevation of the solution pH (final pH, 5.21) promotes the formation of a dimeric uranyl-mediated polycatenated framework, [(UO2)(2)(mu-OH)(2)(TP)(2)](2)(H2BPP)(2)center dot 4.5H(2)O (2). Another new polycatenated framework with a monomeric uranyl unit, [(UO2)(2)(TP)(3)](H2BPP) (3), begins to emerge as a minor accompanying product of 2 when the pH is increased up to 6.61, and turns out to be a significant product at pH 7.00. When more rigid but small-size BPY molecules replace BPP molecules, [UO2(TP)(1.5)](H2BPP)(0.5) (4) with a polycatenated framework similar to 3 was obtained in a relatively acidic solution (final pH, 4.81). The successful preparation of 2-4 represents the first report of uranyl organic polycatenated frameworks derived from a simple H2TP linker. A direct comparison between these polycatenated frameworks and previously reported uranyl terephthalate compounds suggests that the template and cavity-filling effects of organic bases (such as BPP or BPY), in combination with specific hydrothermal conditions, promote the formation of uranyl terephthalate polycatenated frameworks.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available