The Analytical Aspects of Thorium Chemistry.

Moeller, Therald; Schweitzer, George K.; Starr, Donald D.

doi:10.1021/cr60131a002

Cited by 45 publications

(16 citation statements)

References 71 publications

(152 reference statements)

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“…The solid product was filtered and a light-yellow final product was obtained, and yield of the compound was 83.15%. Characterization (C 14 H 8 N 2 O 4 ): 1 Ph-COOMe: 1,10-phenanthroline-2,9-dicarboxylic acid (0.4 g, 1.49 mmol) was suspended in 100 mL methanol and to this solution, 10 mL of conc. H 2 SO 4 was added and the mixture was refluxed overnight.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…Thorium is a naturally occurring radioactive element and its chemistry resembles to that of lanthanides and group IVB elements (Ti, Zr, and Hf). 1 The isotope concentration of thorium and the ratios of parent and daughter isotope concentrations are used to study the formation and metamorphosis of rocks and sediments. 2 In marine systems, thorium has proven to be a very useful tracer of oceanographic processes such as particle cyclic, 3 carbon export flux to boundary scavenging, 4,5 and paleo-circulation.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Thorium is a naturally occurring radioactive element and its chemistry resembles to that of lanthanides and group IVB elements (Ti, Zr, and Hf) . The isotope concentration of thorium and the ratios of parent and daughter isotope concentrations are used to study the formation and metamorphosis of rocks and sediments .…”

Section: Introductionmentioning

confidence: 99%

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Development of the Smartphone-Assisted Colorimetric Detection of Thorium by Using New Schiff’s Base and Its Applications to Real Time Samples

Kumar

Vijayakrishna

et al. 2018

Inorg. Chem.

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In this paper, a new Th 4+ ion-selective chromogenic sensor (L) was developed by reacting 1,10phenanthroline-2,9-dicarbohydrazide with 2-hydroxy naphthaldehyde. The sensing ability of L toward Th 4+ was investigated in solution and paper strips loaded with L using spectrophotometric and colorimetric methods. The selective interaction of L was examined with various f-metal ions and other selected metal ions from s-block and d-block elements. Results show that by the colorimetric method in solutionphase dimethyl sulfoxide/H 2 O (7:3, v/v) and paper strip methods, the naked-eye detectable color change of L occurred from colorless solution to yellow-orange and pale yellow colour upon interacting with Th 4+ and Al 3+ , respectively, whereas other metal ions did not interfere. The ligand L exhibits two absorbance bands at 320 and 375 nm because of ligand-toligand charge transfer. Upon interaction with Th 4+ , L undergoes red shift of both absorption bands and the formation of a new UV−vis band at 335 and 440 nm. The UV−visible spectral studies indicate the formation of a 1:1 host−guest complex between L and Th 4+ with an association constant of 4.7 × 10 3 M −1 . The limit of quantification and limit of detection of L for the analysis of Th 4+ are found to be 167 and 50 nM, respectively. The visually detectable color change of L has been well integrated with a smartphone RGB color value to make it an analytical signal for real-time analysis of Th 4+ with the detection limit down to 116 nM. Besides, L was applied for the analysis of Th 4+ content present in various real water samples, monazite, and lantern mantle samples by spectrophotometry and RGB color values. The binding mode of L with Th 4+ is investigated by 1 H NMR, electrospray ionization-mass, and theoretical studies.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Development of the Smartphone-Assisted Colorimetric Detection of Thorium by Using New Schiff’s Base and Its Applications to Real Time Samples

Kumar

Vijayakrishna

et al. 2018

Inorg. Chem.

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“…For the tetrahalides of thorium a great number of complexes with nitrogen donors are known, mostly with a coordination number of eight for the Th atom. Important complexes like the 8‐quinolol complex, an important reagent for the gravimetric determination of thorium, were synthesized in the first half of the 20th century , . Other examples are thorium complexes with methylamine ThCl 4 (CH 5 N) 4 , aniline ThBr 4 (C 5 H 7 N) 4 or even cocaine ThCl 4 (C 17 H 21 NO 4 ) 2 …”

Section: Introductionmentioning

confidence: 99%

A Simple Access to Pure Thorium(IV) Halides (ThCl₄, ThBr₄, and ThI₄)

Deubner

Rudel

Kraus

2017

Zeitschrift anorg allge chemie

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“…Oxalic acid and thorium nitrate standard solutions are used. The end point is sharp, stoichiometric, and reproducible to a few EXCELLENT reviews have been written on methods of analysis for thorium (4,7). The conclusion of some of the writers ( 7) is that volumetric methods for the determination of thorium are either involved or inaccurate.…”

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confidence: 99%