Superheavy Element Flerovium (Element 114) Is a Volatile Metal

doi:10.1021/ic4026766

	Superheavy Element Flerovium (Element 114) Is a Volatile Metal
	Yakushev, Alexander 1; Gates, Jacklyn M.1,2; Tuerler, Andreas 1; Schaedel, Matthias 2; Duellmann, Christoph E.2,3,4; Ackermann, Dieter 2; Andersson, Lise-Lotte 5; Block, Michael 2; Bruechle, Willy 2; Dvorak, Jan 6,7
刊名	INORGANIC CHEMISTRY
	2014-02-03
卷号	53 页码:1624-1629
ISSN号	0020-1669
DOI	10.1021/ic4026766
文献子类	Article
英文摘要	The electron shell structure of superheavy elements, i.e., elements with atomic number Z >= 104, is influenced by strong relativistic effects caused by the high Z. Early atomic calculations on element 112 (copernicium, Cn) and element 114 (flerovium, Fl) having closed and quasi-closed electron shell configurations of 6d(10)7s(2) and 6d(10)7s(2)7p(1/2)(2), respectively, predicted them to be noble-gas-like due to very strong relativistic effects on the 7s and 7p(1/2) valence orbitals. Recent fully relativistic calculations studying Cn and Fl in different environments suggest them to be less reactive compared to their lighter homologues in the groups, but still exhibiting a metallic character. Experimental gas solid chromatography studies on Cn have, indeed, revealed a metal-metal bond formation with Au. In contrast to this, for Fl, the formation of a weak bond upon physisorption on a Au surface was inferred from first experiments. Here, we report on a gas solid chromatography study of the adsorption of Fl on a Au surface. Fl was produced in the nuclear fusion reaction (244)pu(Ca-48, 3-4n)(288,289)Fl and was isolated in-flight from the primary Ca-48 beam in a physical recoil separator. The adsorption behavior of Fl, its nuclear alpha-decay product Cn, their lighter homologues in groups 14 and 12, i.e., Pb and Hg, and the noble gas Rn were studied simultaneously by isothermal gas chromatography and thermochromatography. Two Fl atoms were detected. They adsorbed on a Au surface at room temperature in the first, isothermal part, but not as readily as Pb and Hg. The observed adsorption behavior of Fl points to a higher inertness compared to its nearest homologue in the group, Pb. However, the measured lower limit for the adsorption enthalpy of Fl on a Au surface points to the formation of a metal-metal bond of Fl with Au. Fl is the least reactive element in the group, but still a metal.
资助项目	Science and Technology Facilities Council[ST/J000094/1] ; Science and Technology Facilities Council[ST/L005689/1] ; Science and Technology Facilities Council[ST/F012039/1] ; Science and Technology Facilities Council[ST/L005670/1]
WOS关键词	HEAVIEST ELEMENTS ; CA-48-INDUCED REACTIONS ; ADSORPTION ; CHEMISTRY ; SURFACES ; RADON ; MODEL ; SEPARATOR ; NUMBERS ; GASES
WOS研究方向	Chemistry
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000330812700043
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/49649]
专题	中国科学院近代物理研究所
通讯作者	Duellmann, Christoph E.
作者单位	1.Tech Univ Munich, Inst Radiochem, D-85748 Garching, Germany 2.GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany 3.Johannes Gutenberg Univ Mainz, Inst Kernchem, D-55099 Mainz, Germany 4.Helmholtz Inst Mainz, Sekt SHE Chem, D-55099 Mainz, Germany 5.Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England 6.Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA 7.Univ Calif Berkeley, Fac Chem, Berkeley, CA 94720 USA 8.Lund Univ, Dept Phys, S-22100 Lund, Sweden 9.Univ Oslo, Dept Chem, N-0315 Oslo, Norway 10.Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Yakushev, Alexander,Gates, Jacklyn M.,Tuerler, Andreas,et al. Superheavy Element Flerovium (Element 114) Is a Volatile Metal[J]. INORGANIC CHEMISTRY,2014,53:1624-1629.
APA	Yakushev, Alexander.,Gates, Jacklyn M..,Tuerler, Andreas.,Schaedel, Matthias.,Duellmann, Christoph E..,...&Wiehl, Norbert.(2014).Superheavy Element Flerovium (Element 114) Is a Volatile Metal.INORGANIC CHEMISTRY,53,1624-1629.
MLA	Yakushev, Alexander,et al."Superheavy Element Flerovium (Element 114) Is a Volatile Metal".INORGANIC CHEMISTRY 53(2014):1624-1629.