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Yamagata, Kazuhito*; Ouchi, Kazuki; Marumo, Kazuki*; Tasaki-Handa, Yuiko*; Haraga, Tomoko; Saito, Shingo*
Inorganic Chemistry, 62(2), p.730 - 738, 2023/01
Times Cited Count：3 Percentile：74.01(Chemistry, Inorganic & Nuclear)The inert NpO
complex with a fluorescein-modified phenanthroline-2,9-dicarboxylic acid was found by kinetic selection using polyacrylamide gel electrophoresis (PAGE) from a small chemical library. The small spontaneous dissociation rate constant of 8
10
s
(the half-life of 23 hours) was determined. This is the singly-charged NpO complex exhibiting unusual kinetic inertness in aqueous solution, one million times slower than widely accepted fast kinetics of neptunyl complexes. Selective fluorescence detection of NpO was achieved in PAGE with a detection limit of 68 pmol dm
(17 fg). This system was successfully applied to simulated spent nuclear fuel and high-level radioactive waste samples.
Omasa, Yoshinori*; Takagi, Shigeyuki*; Toshima, Kento*; Yokoyama, Kaito*; Endo, Wataru*; Orimo, Shinichi*; Saito, Hiroyuki*; Yamada, Takeshi*; Kawakita, Yukinobu; Ikeda, Kazutaka*; et al.
Physical Review Research (Internet), 4(3), p.033215_1 - 033215_9, 2022/09
Ikeda, Takashi; Suzuki, Shinichi; Yaita, Tsuyoshi
Journal of Physical Chemistry A, 119(30), p.8369 - 8375, 2015/07
Times Cited Count：21 Percentile：65.95(Chemistry, Physical)Adsorption states of alkali metal ions in three kinds of 2:1 type clay minerals are systematically investigated via first-principles-based metadynamics. Our reconstructed free energy surfaces in a two dimensional space of coordination numbers specifically employed as collective variables for describing the interlayer cations show that an inner-sphere (IS) complex is preferentially formed for Cs in the 2:1 type trioctahedral clay minerals with saponitelike compositions, where lighter alkali ions show a tendency to form an outer-sphere one instead. The strong preference for an IS complex observed for Cs is found to result partially from the capability of recognizing selectively Cs ions at basal O atoms with the Lewis basicity significantly enhanced by the isomorphic substitution in tetrahedral sheets.
-dimethylformamideKim, S.-Y.; Asakura, Toshihide; Morita, Yasuji; Ikeda, Yasuhisa*
Journal of Alloys and Compounds, 408-412, p.1291 - 1295, 2006/02
Times Cited Count：10 Percentile：54.57(Chemistry, Physical)The electrochemical reactions of UO(
-diketonato)DMF, UO(trop)DMF and UO(sap)(DMF), (DMF = N,N-dimethylformamide, -diketonate = thenoyltrifluoroacetonate (ttfa), benzoyltrifluoroacetonate (btfa), and dibenzoylmethanate(dbm), trop = tropolonate, and sap = 2-salicylidenaminophenolate) complexes in DMF solution containing tetrabutyl ammonium perchlorate as a supporting electrolyte have been studied with cyclic voltammetry. These uranyl(VI) complexes were found to be quasi-reversibly reduced to U(V) species. The formal redox potentials (E
, 
. ferrocene/ferrocenium) for U(VI)/U(V) couples were determined to be -1.18 V for UO(ttfa)DMF, -1.18 V for UO(btfa)DMF, -1.46 V for UO (dbm)DMF, -1.46 V for UO(trop)DMF, and -1.59 V for UO(sap)(DMF).
emission spectroscopy of layered manganate La
Sr
MnO
Agui, Akane; K
mbre, T.*; S
the, C.*; Nordgren, J.*; Usuda, Manabu; Saito, Tomohiko*; Moritomo, Yutaka*
Journal of Electron Spectroscopy and Related Phenomena, 144-147, p.589 - 592, 2005/06
Times Cited Count：1 Percentile：5.68(Spectroscopy)Current research in the perovskite and layered perovskite-type manganese oxides has expanded to include the study of electronic and magnetic properties such as the colossal magnetoresistance (CMR), orbital ordering and charge ordering. The O K soft X-ray emission and absorption spectra (XES and XAS) of LaSrMnO were measured at selected excitation energies in order to investigate the electronic structure. The measurements were carried out by using a soft X-ray emission spectrometer at beamline BW3 at HASYLAB, Germany. The dependence of O K XES on excitation-energy was observed. It is attributed the different site of oxygen ions.
Emission spectra of layered manganite LaSrMnOAgui, Akane; Butorin, S. M.*; Kmbre, T.*; Sthe, C.*; Saito, Tomohiko*; Moritomo, Yutaka*; Nordgren, J.*
Journal of the Physical Society of Japan, 74(6), p.1772 - 1776, 2005/06
Times Cited Count：8 Percentile：48.26(Physics, Multidisciplinary)no abstracts in English
Kim, S.-Y.; Asakura, Toshihide; Morita, Yasuji; Uchiyama, Gunzo*; Ikeda, Yasuhisa*
Radiochimica Acta, 93(2), p.75 - 81, 2005/02
Times Cited Count：9 Percentile：53.1(Chemistry, Inorganic & Nuclear)no abstracts in English
(NO
);M=Cs,Rb,K,NH
);
Spectrochimica Acta, Part A, 51(3), p.309 - 318, 1995/00
no abstracts in English
A.Li*; H.Huang*; D.Li*; S.Zheng*; H.Du*; S.Zhu*; Iwata, Tadao
Japanese Journal of Applied Physics, 32(3), p.1033 - 1038, 1993/03
Times Cited Count：8 Percentile：44.66(Physics, Applied)no abstracts in English
Nagaoka, Yoshiharu; Saito, Minoru;
Transactions of the American Nuclear Society, 66, p.454 - 455, 1992/11
no abstracts in English
Iyoku, Tatsuo; Shiozawa, Shusaku; Ishihara, Masahiro; ; Oku, Tatsuo*
Nucl. Eng. Des., 132, p.23 - 30, 1991/00
Times Cited Count：23 Percentile：89.72(Nuclear Science & Technology)no abstracts in English
Radioisotopes, 35(11), p.571 - 576, 1986/11
no abstracts in English
Applied Spectroscopy, 34(3), p.327 - 331, 1980/00
no abstracts in English
Journal of Inorganic and Nuclear Chemistry, 41(8), p.1145 - 1147, 1979/00
Times Cited Count：7no abstracts in English
Spectrochimica Acta, Part A, 35A(1), p.99 - 104, 1979/00
no abstracts in English
Spectrochimica Acta, Part A, 35A(11), p.1283 - 1288, 1979/00
no abstracts in English
Journal of Inorganic and Nuclear Chemistry, 40(7), p.1369 - 1374, 1978/07
Times Cited Count：20no abstracts in English
;
Analytica Chimica Acta, 96, p.211 - 214, 1978/00
Times Cited Count：0no abstracts in English
J.Coord.Chem., 8, p.35 - 39, 1978/00
Times Cited Count：12no abstracts in English
JAERI-M 7255, 30 Pages, 1977/09
no abstracts in English
