• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Study of bromide complexation of group-4 elements for systematic discussion of halide complexation of Rf

Research Project

Project/Area Number 20K15317
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 34020:Analytical chemistry-related
Research InstitutionSALESIAN POLYTECHNIC (2021-2022)
Institute of Physical and Chemical Research (2020)

Principal Investigator

Yokokita Takuya  サレジオ工業高等専門学校, その他部局等, 助教 (10802655)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsラザホージウム / 臭化水素酸 / 硫酸 / イオン交換 / 固液抽出 / ジルコニウム / ハフニウム / トリウム / 陽イオン交換 / 陰イオン交換 / 紫外可視吸光スペクトル / ラザホージウム (Rf) / 臭化物 / 超重元素 / 化学種同定
Outline of Research at the Start

本研究の目的は、超重元素ラザホージウム(Rf) を含む第4族元素ジルコニウム(Zr)、ハフニウム(Hf)、Rfの臭化物錯形成を調べることである。まず、HBr及びHBrとLiBr混合溶液(HBr/LiBr) 中のZrとHfの化学種を同定し、Br-濃度変化に伴うZrとHfの臭化物錯形成を調べるため、分光分析を行う。次に、Zr、Hf、RfのHBr及びHBr/LiBr溶液系のイオン交換挙動を取得し、ZrとHfのイオン交換挙動をこれらの錯形成を基に解釈する。そして、RfとZrとHfのイオン交換挙動を比較し、単一原子でしか存在できないRfの臭化物錯形成を考察する。

Outline of Final Research Achievements

To study the bromide complexation of Rf, the bromide complexation of Zr and Hf were studied by using ion-exchange and UV-vis spectroscopic measurements in the hydrobromic acid system. On the other hand, the ion exchange reaction between Zr and Hf was slow, and it was difficult to obtain results below the chemical equilibrium for short-lived Rf. Therefore, experimental conditions need to be re-examined for the study of bromide complexes of Rf.
As a related study, a sulfuric acid complex of Rf was also studied: solvent extraction and ESI-MS measurements were performed to examine the dissolved states of Zr and Hf in sulfuric acid. We believe that this method can be used in other chemical reaction systems such as hydrobromic acid systems.

Academic Significance and Societal Importance of the Research Achievements

原子番号104番以降の超重元素に関しては、実験の難しさからこれまで実験がほとんど行われていない。そのような中で、最初の超重元素である104番元素のRfについては、いくつかの定量的な実験データも報告されており、さらなる実験データを取得することで、系統的な考察も行うことができ、超重元素領域における化学的性質の相対論効果の影響を調べることが可能となる。
今回、関連研究として研究を行った硫酸錯体の研究では、Rfと同族元素の間でイオン交換挙動に差が見られており、この実験データを考察し、Rfの化学における相対論効果の影響を調べることにつなげていくことができると考える。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (25 results)

All 2022 2021 2020

All Journal Article (20 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 14 results,  Open Access: 3 results) Presentation (5 results)

  • [Journal Article] Co-precipitation behavior of single atoms of rutherfordium in basic solutions2022

    • Author(s)
      Y. Kasamatsu, K. Toyomura, H. Haba, T. Yokokita, Y. Shigekawa, A. Kino, Y. Yasuda, Y. Komori, J. Kanaya, M. Huang, M. Murakami, H. Kikunaga, E. Watanabe, T. Yoshimura, K. Morita, T. Mitsugashira, K. Takamiya, T. Ohtuski, A. Shinohara
    • Journal Title

      RIKEN Accel. Prog. Rep.

      Volume: 55

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Online anion-exchange experiment of 89mZr in the Adgen 464/HNO3 system for the chemical resarch of Rf2022

    • Author(s)
      E. Watanabe, T. Yokokita, Y. Kasamatsu, S. Hayami, K. Tonai, Y. Shigekawa, H. Haba, A. Shinohara
    • Journal Title

      RIKEN Accel. Prog. Rep.

      Volume: 55 Pages: 120-121

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Solvent extraction of Zr and Hf in trioctylamine/H2SO4 system2022

    • Author(s)
      T. Yokokita, H. Haba
    • Journal Title

      RIKEN Accel. Prog. Rep.

      Volume: 55 Pages: 122-122

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Anion- and cation-exchange studies of Zr, Hf, and Th using ion-exchange resin and fiber in H2SO4 media for chemical characterization of sulfate complex of Rf2022

    • Author(s)
      Yokokita Takuya、Yano Shinya、Komori Yukiko、Haba Hiromitsu
    • Journal Title

      Journal of Radioanalytical and Nuclear Chemistry

      Volume: 331 Issue: 2 Pages: 1127-1134

    • DOI

      10.1007/s10967-021-08184-y

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Anion- and cation-exchange studies of Zr, Hf, and Th using ion-exchange resin and fiber in H2SO4 media for chemical characterization of sulfate complex of Rf2021

    • Author(s)
      E. Watanabe, Y. Kasamatsu, T. Yokokita, S. Hayami, K. Tonai, H. Ninomiya, N. Kondo, Y. Shigekawa, H. Haba, Y. Kitagawa, M. Nakano, and A. Shinohara
    • Journal Title

      Solvent Extr. Ion Exch.

      Volume: 未定 Issue: 6 Pages: 1-16

    • DOI

      10.1080/07366299.2021.2020956

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Production of 266Bh in the 248Cm(23Na, 5n)266Bh reaction and its decay properties2021

    • Author(s)
      H. Haba et al.
    • Journal Title

      RIKEN Accelerator Progress Report

      Volume: 54 Pages: 141-141

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Anion-exchange behavior of Db in HF/HNO3 solution2021

    • Author(s)
      M. Kato, S. Adachi, A. Toyoshima, K. Tsukada, M. Asai, T. Yokokita, Y. Komori, Y. Wang, Y. Shigekawa, D. Mori, H. Haba, A. Kashihara, A. Nakajima, K. Tokoi, Y. Suzuki, K. Nishizuka, K. Sueki
    • Journal Title

      RIKEN Accelerator Progress Report

      Volume: 54 Pages: 147-147

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Anion exchange of Rf in H2SO4 using the batch-type solid-liquid extraction apparatus AMBER2021

    • Author(s)
      T. Yokokita, Y. Kasamatsu, E. Watanabe, Y. Komori, Y. Shigekawa, Y. Wang, D. Mori, H. Ninomiya, S. Hayami, K. Tonai, K. Ghosh, A. Shinohara, H. Haba
    • Journal Title

      RIKEN Accelerator Progress Report

      Volume: 54 Pages: 148-148

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Online anion-exchange experiment of Zr in H2SO4 for the chemical study of Rf in H2SO42021

    • Author(s)
      T. Yokokita, Y. Shigekawa, Y. Wang, Y. Komori, Y. Kasamatsu, E. Watanabe, H. Haba
    • Journal Title

      RIKEN Accelerator Progress Report

      Volume: 54 Pages: 149-149

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Solvent extraction of Zr and Hf from HCl by Aliquat 336 using a flow-type extraction apparatus toward online chemical studies of element 104, rutherfordium2021

    • Author(s)
      Y. Kasamatsu, N. Kondo, K. Nakamura, Y. Kuboki, H. Ninomiya, Y. Shigekawa, E. Watanabe, Y. Yasuda, K. Toyomura, M. Nagase, T. Yokokita, Y. Komori, H. Haba, T. Yoshimura, H. Itabashi, A. Shinohara
    • Journal Title

      RIKEN Accelerator Progress Report

      Volume: 54 Pages: 150-150

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Cation- and anion-exchange behavior and UV-vis spectroscopy of Zr in HBr for chemical characterization of bromide complexes of Rf2021

    • Author(s)
      T. Yokokita and H. Haba
    • Journal Title

      RIKEN Accelerator Progress Report

      Volume: 54 Pages: 151-151

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Co-precipitation behaviour of single atoms of rutherfordium in basic solutions2021

    • Author(s)
      Y. Kasamatsu, K. Toyomura, H. Haba, T. Yokokita, A. Kino, Y. Yasuda, Y. Komori, J. Kanaya, M.H. Huang, M. Murakami, H. Kikunaga, E. Watanabe, T. Yoshimura, K. Morita, T. Mitsugashira, K. Takamiya, T. Ohtsuki, A. Shinohara
    • Journal Title

      NATURE CHEMISTRY

      Volume: 13 Issue: 3 Pages: 226-230

    • DOI

      10.1038/s41557-020-00634-6

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Production of Bh266 in the Cm248(Na23,5n)Bh266 reaction and its decay properties2020

    • Author(s)
      Haba H.他(Shigekawa Y. 19番目)
    • Journal Title

      Physical Review C

      Volume: 102 Issue: 2 Pages: 024625-024625

    • DOI

      10.1103/physrevc.102.024625

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Solvent Extraction of Zr and Hf from HCl by Aliquat 336 using a Flow-Type Extraction Apparatus Toward Online Chemical Studies of Element 104, Rutherfordium2020

    • Author(s)
      Kasamatsu Yoshitaka、Kondo Narumi、Nakamura Kouhei、Kuboki Yuki、Ninomiya Hidemi、Shigekawa Yudai、Watanabe Eisuke、Yasuda Yuki、Toyomura Keigo、Nagase Masahiro、Yokokita Takuya、Komori Yukiko、Haba Hiromitsu、Yoshimura Takashi、Itabashi Hideyuki、Shinohara Atsushi
    • Journal Title

      Solvent Extraction and Ion Exchange

      Volume: 38 Issue: 3 Pages: 318-327

    • DOI

      10.1080/07366299.2020.1726075

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] On-line anion-exchange experiment of Nb and Ta in HF/HNO3 mixture solution for Db chemistry2020

    • Author(s)
      S. Adachi, A. Toyoshima, K. Tsukada, H. Haba, Y. Komori, T. Yokokita, Y. Shigekawa, Y. Wang, A. Kashihara, M. Kato, A. Nakajima, K. Sueki
    • Journal Title

      RIKEN Accelerator Progress Report 2019

      Volume: 53 Pages: 162-162

    • Related Report
      2020 Research-status Report
  • [Journal Article] Anion-exchange behavior of Nb, Ta and Pa in H2SO42020

    • Author(s)
      M. Kato, K. Tsukada, H. Haba, Y. Komori, T. Yokokita, D. Mori, S. Adachi, A. Kashihara, K. Sueki
    • Journal Title

      RIKEN Accelerator Progress Report 2019

      Volume: 53 Pages: 163-163

    • Related Report
      2020 Research-status Report
  • [Journal Article] Anion exchange of Nb and Ta in HF/HCl mixture solution for Db chemistry2020

    • Author(s)
      T. Yokokita, H. Haba
    • Journal Title

      RIKEN Accelerator Progress Report 2019

      Volume: 53 Pages: 164-164

    • Related Report
      2020 Research-status Report
  • [Journal Article] Anion exchange of element 104, Rf, at 0.11 M H2SO4 by using batch-type solid-liquid extraction apparatus, AMBER2020

    • Author(s)
      T. Yokokita, Y. Kasamatsu, E. Watanabe, Y. Komori, Y. Shigekawa, Y. Wang, D. Mori, H. Ninomiya, S. Hayami, K. Tonai, K. Ghosh, A. Shinohara, H. Haba
    • Journal Title

      RIKEN Accelerator Progress Report 2019

      Volume: 53 Pages: 165-165

    • Related Report
      2020 Research-status Report
  • [Journal Article] Anion exchange of Zr, Hf, and Th by the automated extraction apparatus: toward the chemical study of 104Rf in HNO32020

    • Author(s)
      E. Watanabe, T. Yokokita, Y. Kasamatsu, S. Hayami, K. Tonai, Y. Shigekawa, H. Haba, A. Shinohara
    • Journal Title

      RIKEN Accelerator Progress Report 2019

      Volume: 53 Pages: 166-166

    • Related Report
      2020 Research-status Report
  • [Journal Article] An attempt to modify the membrane degasser (MDG)2020

    • Author(s)
      Y. Komori, K. Ooe, T. Yokokita. Y. Shigekawa, H. Haba
    • Journal Title

      RIKEN Accelerator Progress Report 2019

      Volume: 53 Pages: 169-169

    • Related Report
      2020 Research-status Report
  • [Presentation] クラウンエーテルを用いた102番元素ノーベリウムの硝酸系固液抽出実験2022

    • Author(s)
      渡邉瑛介, 笠松良崇, 横北卓也, 中西諒平 大髙咲希 板倉悠大 , 益田遼太郎, 王瑞麟, 重河優大, 南部明弘, 殷小杰, 羽場宏光, 高宮幸一, 篠原厚
    • Organizer
      日本放射化学会第66回討論会 (2022)
    • Related Report
      2022 Annual Research Report
  • [Presentation] Zr及びHfのスルファト錯体推定に向けたTOA/H2SO4系の溶媒抽出2022

    • Author(s)
      横北卓也, 羽場宏光
    • Organizer
      日本化学会第102春季年会 (2022)
    • Related Report
      2021 Research-status Report
  • [Presentation] HF/HNO3系における Db の陰イオン交 換挙動2020

    • Author(s)
      加藤 瑞 穂, 安達 サディア, 豊嶋 厚史, 塚田 和明, 浅井 雅人, 羽場 宏光, 横北 卓 也, 小森 有希子, 重河 優大, Yang Wang, 森 大輝, 柏原 歩那, 床井 健運, 中島 朗久, 鈴木 雄介, 西塚 魁人, 末木 啓介
    • Organizer
      日本放射化学会第 64 回討論会(2020)
    • Related Report
      2020 Research-status Report
  • [Presentation] 硫酸系における Rf の陰イオン交換: 分配係数の硫酸濃度依存性2020

    • Author(s)
      横北 卓也, 笠松 良崇, 渡邉 瑛介, 小森 有 希子, 重河 優大, 森 大輝, 王 洋, 二 宮 秀美, 速水 翔, 東内 克馬, ゴーシ ュ コースタブ, 篠原 厚, 羽場 宏光
    • Organizer
      日本放射化学会第 64 回討論会(2020)
    • Related Report
      2020 Research-status Report
  • [Presentation] Rf の化学研究に向けた 89mZr の硝酸系でのオンライン陰イオン交換実験2020

    • Author(s)
      渡邉 瑛介, 笠松 良崇, 横北 卓也, 速水 翔, 東内 克馬, 重河 優大, 羽場 宏光, 篠原 厚
    • Organizer
      日本放射化学会第 64 回討論会(2020)
    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi