Speciation and chemical behaviors of a superheavy elemnt, Rf in aqueous solution

• Project/Area Number: 23550070
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Inorganic chemistry
• Research Institution: Kanazawa University
• Principal Investigator: YOKOYAMA AKIHIKO 金沢大学, 物質化学系, 教授 (80230655)
• Co-Investigator(Kenkyū-buntansha): SATO Wataru 金沢大学, 理工研究域物質化学系, 准教授 (90333319)
• Co-Investigator(Renkei-kenkyūsha): TSUKADA Kazuaki 日本原子力機構, 先端基礎研究センター, サブリーダー (30343916) ; HABA Hiromitsu 理化学研究所, 森田超重元素研究室, 専任研究員 (60360624)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2011: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
• Keywords: 超重元素 / 抽出クロマトグラフィー / ラザホージウム / 液液抽出 / 液液平衡

Research Abstract

In order to elucidate relevant chemical species of Rf by means of reversed-phase extraction chromatography with 2-thenoyltrifluoroacetone (TTA) as a stationary phase, we measured the equilibration time and distribution ratios in extraction by batch method experiments with carrier-free radiotracers of Zr and Hf on TTA-resin in the HF/HNO3 solutions and optimized an appropriate experimental condition for Rf. An online experiment has been also performed for the reversed-phase chromatographic behaviors of Zr and Hf on the TTA resin to simulate the Rf experiments. The elution curves from columns with the resin in the on-line experiment using Zr and Hf short-lived isotopes were obtained to show the effective adsorption with TTA although the equilibrium has not been attained, yet. The Rf atoms appears to be adsorbed to TTA in the on-line experiment with Rf, but the analysis is still on the way to deriving conclusive results.

Research Products

• [Journal Article] Adsorption behavior of Zr and Hf to TTA-resin in microcolumn for determining the forming ability of Rf monofluoride complex (2014)
  • Author(s): A. Yokoyama, Y. Kitayama, Y. Fukuda, A. Toyoshima, K. Tsukada, E. Maeda, H. Kimura, T. Taniguchi, S. Ueno, K. Hayashi, H. Kikunaga, M. Murakami, J. Kanaya, M. Huang, H. Haba
  • Journal Title: RIKEN Accel. Prog. Rep Volume: Vol.47(in press)
  • URL: http://www.nishina.riken.jp/researcher/APR/index_e.html
  • Peer Reviewed
• [Journal Article] Adsorption Behavior of Zr and Hf to TTA-resin in Microcolumn for Determining the Forming Ability of Rf Monofluoride Complex (2014)
  • Author(s): Y. Kitayama, Y. Shigeyoshi, A. Yokoyama, A. Toyoshima, K. Tsukada, K. Ooe, E. Maeda, H. Kimura, H. Kikunaga, Y. Kudou, J. Kanaya, M. Huang, H. Haba
  • Journal Title: Journal of Nuclear and Radioanalytical Chemistry Volume: 未定
  • Peer Reviewed
• [Journal Article] Adsorption behavior of Zr and Hf to TTA-resin in microcolumn for determining the forming ability of Rf monofluoride complex (2014)
  • Author(s): A. Yokoyama, Y. Kitayama, Y. Fukuda, A. Toyoshima, K. Tsukada, E. Maeda, H. Kimura
  • Journal Title: RIKEN Accelerator Report 2013 Volume: 48
  • Peer Reviewed
• [Journal Article] Preliminary study on quadrivalent chemical species of rutherfordium in aqueous solution by means of TTA resin (2013)
  • Author(s): A. Yokoyama, Y. Shigeyoshi, Y. Kitayama, A. Toyoshima, K. Tsukada, K. Ooe, E. Maeda, H. Kimura, H. Kikunaga, Y. Kudou, J. Kanaya, M. Huang, H. Haba
  • Journal Title: RIKEN Accel. Prog. Rep Volume: Vol.46 Pages: 242-242
  • URL: http://www.nishina.riken.jp/researcher/APR/index_e.html
  • Peer Reviewed
• [Journal Article] Preliminary study on quadrivalent chemical species of rutherfordium in an aqueous solution by using TTA resin (2013)
  • Author(s): A. Yokoyama, Y. Shigeyoshi, Y. Kitayama, A. Toyoshima, K. Tsukada, K. Ooe, E. Maeda, H. Kimura, H. Kikunaga, Y. Kudou, J. Kanaya, M. Huang, and H. Haba
  • Journal Title: RIKEN Accelerator Progress Report Volume: Vol. 46
  • Peer Reviewed
• [Presentation] Adsorption Behavior of Zr and Hf to TTA-resin in Microcolumn for Determining the Forming Ability of Rf Monofluoride Complex (2013)
  • Author(s): Y. Kitayama, Y. Shigeyoshi, A. Toyoshima, K. Tsukada, K. Ooe, E. Maeda, H. Kimura, H. Kikunaga, Y. Kudou, J. Kanaya, M. Huang, H. Haba, A. Yokoyama
  • Organizer: 5th Asia-Pacific Symposium on Radiochemistry
  • Place of Presentation: Kanazawa, Japan
• [Presentation] Adsorption Behavior of Zr and Hf to TTA-resin in Microcolumn for Determining the Forming Ability of Rf Monofluoride Complex (2013)
  • Author(s): Y. Kitayama, Y. Shigeyoshi, A. Yokoyama, A. Toyoshima, K. Tsukada, K. Ooe, E. Maeda, H. Kimura, H. Kikunaga, Y. Kudou, J. Kanaya, M. Huang, H. Haba
  • Organizer: 5th Asia-Pacific Symposium on Radiochemsitry
  • Place of Presentation: 金沢市民文化ホール、金沢市
• [Presentation] Study on Quadrivalent Chemical Species of Rutherfordium in Aqueous Solution by Means of TTA resin (2012)
  • Author(s): A. Yokoyama, Y. Shigeyoshi, Y. Takeda, M. Araki, A. Toyoshima, K. Tsukada, Y. Kasamatsu, H. Kikunaga, H. Haba, and J. Kanaya
  • Organizer: EuCheMS International Conference on Nuclear and Radiochemistry (NRC-8)
• [Presentation] Rfの化学種解明に向けた逆相クロマトグラフ用樹脂調製法の再検討II (2012)
  • Author(s): 重吉祐生, 北山雄太, 横山明彦
  • Organizer: 2012日本放射化学会年会・第56回放射化学討論会
  • Place of Presentation: 東京工業大学大岡山
• [Presentation] Study on Quadrivalent Chemical Species of Rutherfordium in Aqueous Solution by Means of TTA resin (2012)
  • Author(s): A. Yokoyama, Y. Shigeyoshi, Y. Takeda, M. Araki, A. Toyoshima, K. Tsukada, Y. Kasamatsu, H. Kikunaga, and H. Haba
  • Organizer: International Conference on Nuclear and Radiochemistry (NRC8)
  • Place of Presentation: Como, Italy
• [Presentation] ラザホージウム化学種解明のための逆相抽出クロマトグラフ用樹脂調整法の再検討 (2011)
  • Author(s): 武田 勇樹
  • Organizer: 日本放射化学会
  • Place of Presentation: 長野市若里市民文化ホール(長野）