Lanthanide-oxalate coordination polymers formed by reductive coupling of carbon dioxide to oxalate: [Ln(2)(3,5-pdc)(2)(C2O4)(H2O)(4)]center dot 2H(2)O (Ln = Eu, Sm, Ho, Dy; pdc = pyridinedicarboxylate)
- Authors
- Huh, HS[Huh, Hyun Sue]; Lee, SW[Lee, Soon W.]
- Issue Date
- 20-Nov-2006
- Publisher
- KOREAN CHEMICAL SOC
- Citation
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.27, no.11, pp.1839 - 1843
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY
- Volume
- 27
- Number
- 11
- Start Page
- 1839
- End Page
- 1843
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/86503
- ISSN
- 0253-2964
- Abstract
- Hydrothermal reactions of Ln(NO3)(3.)5H(2)O (Ln = Eu (1), Sm (2), Ho (3), Dy (4)) with 3,5-pyridinedicarboxylic acid (3,5-pdcH(2)) in the presence of 4,4'-bipyridine led to the formation of the 3-D Ln(III)-coordination polymers with a formula unit of [Ln(2)(3,5-pdc)(2)(C2O4)(H2O)(4)]-2H(2)O. These polymers contain a bridging oxalate ligand (C2O42-). On the basis of GC-MS study of the mother liquor remaining after the reaction, we proposed that the C2O42- formation proceeds in three steps: (1). Ln(III)-mediated decarboxylation of 3,5-pdcH2 to give CO2, (2) the reduction of CO2 to CO2.- by the Ln(II) species, and (3) the reductive coupling of the two CO2.- radicals to the oxalate (C2O42-) ion. All polymers were structurally characterized by X-ray diffraction.
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