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Journal Articles

Effect of the introduction of amide oxygen into 1,10-phenanthroline on the extraction and complexation of trivalent lanthanide in acidic condition

Kobayashi, Toru; Yaita, Tsuyoshi; Suzuki, Shinichi; Shiwaku, Hideaki; Okamoto, Yoshihiro; Akutsu, Kazuhiro*; Nakano, Yoshiharu*; Fujii, Yuki*

Separation Science and Technology, 45(16), p.2431 - 2436, 2010/11

https://doi.org/10.1080/01496395.2010.510094
 Times Cited Count：35 Percentile：71.17(Chemistry, Multidisciplinary)

Journal Articles

Structural studies of lanthanide nitrate-${it N,N'}$-dimethyl-${it N,N'}$-diphenylpyridine-2,6-dicarboxyamide complexes

Fujiwara, Asako; Nakano, Yoshiharu*; Yaita, Tsuyoshi; Okuno, Kenji*

Journal of Alloys and Compounds, 456(1-2), p.429 - 435, 2008/05

https://doi.org/10.1016/j.jallcom.2007.02.056
 Times Cited Count：17 Percentile：64.5(Chemistry, Physical)

The tridentate ligand ${it N,N'}$-dimethyl-${it N,N'}$-diphenylpyridine-2,6-dicarboxyamide (DMDPhPDA) and the corresponding lanthanum complex [La(NO$$_{3}$$)$$_{3}$$(DMDPhPDA)$$_{2}$$] have been prepared and structurally characterised. In the lanthanum complex, two DMDPhPDA molecules coordinated to La(III) in a tridentate fashion and to three nitrate ions in a bidentate fashion make the lanthanum atom 12-coordinate. The stability constants determined by spectrophotometric titration suggest that [Ln(DMDPhPDA)$$_{2}$$]$$^{3+}$$ is the primary product in nitrate media and [Ln(DMDPhPDA)$$_{3}$$]$$^{3+}$$ is difficult to form. However, [Ln(DMDPhPDA)$$_{2}$$]$$^{3+}$$ could not be distinguished in $$^{13}$$C NMR spectra. The $$^{13}$$C NMR titration results imply that a fast ligand exchange process takes place.

Journal Articles

Facile preparation and the crystal structure of ${it N,N'}$-dialkyl-2,6-pyridinedimethanaminium halide

Kobayashi, Toru; Yaita, Tsuyoshi; Sugo, Yumi; Suda, Hiroki*; Suzuki, Shinji*; Fujii, Yuki*; Nakano, Yoshiharu*

Journal of Heterocyclic Chemistry, 43(3), p.549 - 557, 2006/05

https://doi.org/10.1002/jhet.5570430305
 Times Cited Count：5 Percentile：13.44(Chemistry, Organic)

Journal Articles

Extraction of Am(III) and Lanthanide(III) ions from HNO$$_{3}$$ solutions using ${it N,N'}$-dimethyl-${it N,N'}$-diphenylpyridine-2,6-dicarboxyamide

Shimada, Asako; Yaita, Tsuyoshi; Narita, Hirokazu; Tachimori, Shoichi; Kimura, Takaumi; Okuno, Kenji*; *

Solvent Extraction Research and Development, Japan, 11, p.1 - 10, 2004/04

The distribution ratio (${it D}$) of Am(III) and lighter Ln(III) in the extraction with ${it N,N'}$-dimethyl-${it N,N'}$-diphenylpyridine-2,6-dicarboxyamide(DMDPhPDA) from HNO$$_{3}$$ solutions were determined. The D's increased with an increase of HNO$$_{3}$$ concentration. Additionally, separation of Am(III) from Ln(III) were confirmed for all the HNO$$_{3}$$ concentration range (S.F.=(D$$_{Am}$$/D$$_{Ln}$$)). From 4 M HNO$$_{3}$$ solution with 0.5 M DMDPhPDA CHCl$$_{3}$$ solution, the ${it D}$'s of Am(III), Eu(III) and Nd(III) were 1.3, 0.25 and 0.24, respectively. This result suggests that Am(III) can be separated from Eu and Nd in the higher HNO$$_{3}$$ concentration region than that has been reported so far. These ${it D}$'s value and the S.F. were reproduced in the extraction from the metal concentration range from 10$$^{-1}$$ M order to 10$$^{-8}$$ M.

Journal Articles

Photopromoted oxidative cyclization of an o-phenylene-bridged schiff base via a manganese(III) complex, leading to a fluorescent compound, 2-(2-hydroxyphenyl)benzimidazole

Sakamoto, Fuminori; *; Sato, Minoru*; *; X.S.Tan*; Fujii, Yuki*

Chemical Communications, (13), p.1391 - 1392, 1998/00

no abstracts in English

Oral presentation

Synthesis and their ion recognition properties of phenanthroline-aide type ligands for tri- and tetra-valent actinides

Kobayashi, Toru; Yaita, Tsuyoshi; Suzuki, Shinichi; Shiwaku, Hideaki; Okamoto, Yoshihiro; Akutsu, Kazuhiro; Nakano, Yoshiharu*; Fujii, Yuki*

no journal, , 

no abstracts in English

Oral presentation

Separation of lanthanide ion by aromatic nitrogen ligands and fluorescent property of the extracted complex

Shiwaku, Hideaki; Akutsu, Kazuhiro; Yaita, Tsuyoshi; Okamoto, Yoshihiro; Kobayashi, Toru; Numakura, Masahiko; Nakano, Yoshiharu*; Mahara, Saori*; Fujii, Yuki*

no journal, , 

no abstracts in English

Oral presentation

Extraction properties of lanthanides by various aromatic nitrogen ligands

Akutsu, Kazuhiro; Shiwaku, Hideaki; Okamoto, Yoshihiro; Suzuki, Shinichi; Ikeda, Atsushi; Kobayashi, Toru*; Numakura, Masahiko; Mahara, Saori*; Nakano, Yoshiharu*; Fujii, Yuki*; et al.

no journal, , 

no abstracts in English

8 (Records 1-8 displayed on this page)
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