Uranyl Complexes of Alkyl-Bridged Ditopic Diaminotetraphenol Ligands and Their Use as Uranyl Ion Extractors

2013 ◽  
Vol 52 (15) ◽  
pp. 8591-8600 ◽  
Author(s):  
Antti Riisiö ◽  
Ari Väisänen ◽  
Reijo Sillanpää
Keyword(s):  
Uranyl Ion ◽  
Uranyl Complexes

scholarly journals Investigation on the Synthesis and Photocatalytic Property of Uranyl Complexes of the β-Diketonates Biscatecholamide Ligand

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Qingchun Zhang ◽  
Bo Jin ◽  
Rufang Peng ◽  
Xiaofang Wang ◽  
Zhaotao Shi ◽  
...  
Keyword(s):  
Oxygen Atom ◽  
Photocatalytic Degradation ◽  
Elemental Analysis ◽  
Uranyl Nitrate ◽  
Rhodamine B ◽  
Photocatalytic Property ◽  
Uranyl Ion ◽  
Uranyl Complexes ◽  
H Nmr ◽  
Degradation Properties

A series of uranyl complexes have been synthesized by reacting hexadentate ligands CH2[COO (CH2)nCAM; n=2, 3, 4]2 [CAM = 2,3-Ph(OH)2CONH] containing the catecholamide (CAM) group and β-diketonates framework with uranyl nitrate. They were characterized by FTIR, UV-vis, 1H NMR, XPS, TGA, and elemental analysis. The analysis revealed that oxygen atom of β-diketonate did not bind to uranyl ion in complexes 1–3. The photocatalytic degradation properties of the target complexes for degradation of rhodamine B (RhB) were investigated. The result indicated that approximately 74%, 71%, and 67% RhB were degraded in the presence of complexes 1–3 after about 210 min, respectively. Consequently, complexes 1–3 have excellent photocatalytic degradation property.

The low frequency infrared and Raman spectroscopic studies of some uranyl complexes: the deformation frequency of the uranyl ion

1970 ◽  
Vol 48 (19) ◽  
pp. 3095-3097 ◽  
Author(s):  
J. I. Bullock ◽  
F. W. Parrett
Keyword(s):  
Raman Spectra ◽  
Vibrational Spectra ◽  
Low Frequency ◽  
Monovalent Cation ◽  
Spectroscopic Studies ◽  
Uranyl Ion ◽  
Not Given ◽  
Uranyl Complexes ◽  
Raman Spectroscopic ◽  
Deformation Frequency

A study of the low frequency vibrational spectra of compounds of the type L2UO2(NO3)2 (L = mono-dentate ligand), MUO2(NO3)3 (M = monovalent cation), and CS2UO2X4 (X = Cl or Br) has shown that the deformation frequency of the uranyl group occurs in the region 274–245 cm−1 but detailed assignments of the U—O (nitrate) frequencies are not given since it is shown that structurally related complexes do not necessarily give similar low frequency infrared (i.r.) and Raman spectra.

scholarly journals Synthesis of 3-(2-Hydroxyphenyl)-5-(2-Pyridinyl)-1,2,4-triazoles as a potential chelate ligand for Uranyl ion

2020 ◽  
Vol 8 (2) ◽  
pp. 1-6
Author(s):  
Oleksandr Vashchenko ◽  
Dmytro Khomenko ◽  
Roman Doroschuk ◽  
Ilona Raspertova ◽  
Rostyslav Lampeka
Keyword(s):  
Ir Spectroscopy ◽  
Uranyl Ion ◽  
Molecular Formula ◽  
Chelate Ligand ◽  
Pyridyl Nitrogen ◽  
Uranyl Complexes ◽  
Mononuclear Complexes ◽  
Phenol Oxygen

Two new uranyl complexes with the molecular formula [(UO2)(H2L1)](СH3OH) and [(UO2)(H3L2)](СH3OH) {H4L1 = 2-[5-[[5-[[5-(2-pyridyl)-1H-1,2,4-triazol-3‑yl]methyl]-1H-1,2,4-triazol-3-yl]methyl]-1H-1,2,4-triazol-3-yl]phenol and H5L2 = 2-[5-[[5-[[5-[[5-(2-pyridyl)-1H-1,2,4‑triazol-3-yl]methyl]-1H-1,2,4-triazol-3-yl]methyl]-1H-1,2,4-triazol-3-yl]methyl]-1H-1,2,4-triazol-3-yl]phenol)} have been synthesized. All compounds have been characterized by NMR and IR spectroscopy. With H4L1 and H5L2 uranyl ion forms mononuclear complexes. In [(UO2)(H3L2)](СH3OH) pyridyl nitrogen was uncoordinated and bonding of H5L2 was realized only through phenol oxygen and N4-nitrogens of triazole cycles.

The Preparation of p(acrylonitrile-co-acrylamide) hydrogels for uranyl ion recovery from aqueous environments

2014 ◽  
Vol 1 (42) ◽  
pp. 89-89 ◽  
Author(s):  
Duygu Alpaslan ◽  
Nahit Aktas ◽  
Selehattin Yilmaz ◽  
Nurettin Sahiner
Keyword(s):  
Uranyl Ion ◽  
Aqueous Environments

Preconcentration of Uranium(VI) on Modified and Unmodified Amberlite XAD 4 Sorbent

1993 ◽  
Vol 58 (8) ◽  
pp. 1813-1820 ◽  
Author(s):  
Jan Vácha ◽  
Lumír Sommer
Keyword(s):  
Spectrophotometric Determination ◽  
Uranyl Ion ◽  
Sodium Diethyldithiocarbamate ◽  
Uranyl Ions ◽  
Methanolic Solution

The sorption of uranyl ions on columns with the macrophorus hydrophobic sorbent Amberlite XAD 4 modified with 1-(2-pyridylazo)-2-naphthol and sodium diethyldithiocarbamate was examined. Following elution of the uranyl ion with HNO3 (2 - 4 mol l-1) or of the diethyldithiocarbamate UO22+-chelate with a methanolic solution of HCl (0.1 mol l-1), uranium was determined spectrophotometrically with 4-(2-pyridylazo)resorcinol or with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol. The preconcentration of uranium on Amberlite XAD 4 type sorbents is convenient for its spectrophotometric determination in waters.

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