TY - JOUR
T1 - Fluorido complex formation of element 104, Rutherfordium (Rf)
AU - Ishii, Yasuo
AU - Toyoshima, Atsushi
AU - Tsukada, Kazuaki
AU - Asai, Masato
AU - Li, Zijie
AU - Nagame, Yuichiro
AU - Miyashita, Sunao
AU - Mori, Tomotaka
AU - Suganuma, Hideo
AU - Haba, Hiromitsu
AU - Goto, Shin Ichi
AU - Kudo, Hisaaki
AU - Akiyama, Kazuhiko
AU - Oura, Yasuji
AU - Shinohara, Atsushi
AU - Schädel, Matthias
AU - Pershina, Valeria
AU - Kratz, Jens V.
PY - 2011
Y1 - 2011
N2 - We have investigated the cation-exchange behavior of element 104, rutherfordium (Rf), together with its lighter group-4 homologs Zr and Hf, and the tetravalent pseudo-homolog Th in HF/HNO3 mixed solution. The results, obtained on a one-atom-at-a-time scale, demonstrate that distribution coefficients (Kd) of Rf in HF/0.10M HNO3 decrease with increasing concentration of the fluoride ion [F-]. This resembles the behavior of the homologs, indicating the consecutive formation of fluorido complexes of Rf. We also measured the Kd values of Rf and the homologs as a function of the hydrogen ion concentration [H+] in the range of [F-] = 5.29 × 10-7 -3.17 × 10 -6 M. The logKd values decrease linearly with an increase of log[H+] with slopes between -2.1 and -2.5. This indicates that these elements are likely to form the same chemical compounds: mixture of [MF] 3+ and [MF2]2+ (M = Rf, Zr, Hf, and Th) in the studied solution. It is also ascertained that the fluorido complex formation of Rf is significantly weaker than that of Zr and Hf, but it is stronger than that of Th.
AB - We have investigated the cation-exchange behavior of element 104, rutherfordium (Rf), together with its lighter group-4 homologs Zr and Hf, and the tetravalent pseudo-homolog Th in HF/HNO3 mixed solution. The results, obtained on a one-atom-at-a-time scale, demonstrate that distribution coefficients (Kd) of Rf in HF/0.10M HNO3 decrease with increasing concentration of the fluoride ion [F-]. This resembles the behavior of the homologs, indicating the consecutive formation of fluorido complexes of Rf. We also measured the Kd values of Rf and the homologs as a function of the hydrogen ion concentration [H+] in the range of [F-] = 5.29 × 10-7 -3.17 × 10 -6 M. The logKd values decrease linearly with an increase of log[H+] with slopes between -2.1 and -2.5. This indicates that these elements are likely to form the same chemical compounds: mixture of [MF] 3+ and [MF2]2+ (M = Rf, Zr, Hf, and Th) in the studied solution. It is also ascertained that the fluorido complex formation of Rf is significantly weaker than that of Zr and Hf, but it is stronger than that of Th.
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U2 - 10.1246/bcsj.20110126
DO - 10.1246/bcsj.20110126
M3 - Article
AN - SCOPUS:80052737286
SN - 0009-2673
VL - 84
SP - 903
EP - 911
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
IS - 9
ER -