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

2013 Fiscal Year Final Research Report

• 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
• 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

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] 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
  • URL: http://www.nishina.riken.jp/researcher/APR/index_e.html
  • 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
  • Year and Date: 20130922-27
• [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)
  • Year and Date: 20120916-21