Nuclear Field Shift Effect in Isotope Fractionation of Mercury during Abiotic Reduction in the Absence of Light

2010 ◽  
Vol 114 (12) ◽  
pp. 4238-4245 ◽  
Author(s):  
Wang Zheng ◽  
Holger Hintelmann
Keyword(s):  
Isotope Fractionation ◽  
Nuclear Field ◽  
Field Shift ◽  
Abiotic Reduction ◽  
Shift Effect

scholarly journals Nuclear field shift effect of lead in ligand exchange reaction using a crown ether

2011 ◽  
Vol 1 (1) ◽  
pp. 387-392 ◽  
Author(s):  
T. Fujii ◽  
F. Moynier ◽  
A. Agranier ◽  
E. Ponzevera ◽  
M. Abe
Keyword(s):  
Crown Ether ◽  
Ab Initio ◽  
Exchange Reaction ◽  
Ligand Exchange ◽  
Isotope Fractionation ◽  
Ligand Exchange Reaction ◽  
Nuclear Field ◽  
Field Shift ◽  
Shift Effect ◽  
Mass Dependent

AbstractLead isotopes were fractionated by the liquid-liquid extraction technique between an aqueous phase and a crown ether. After purification by ion-exchange chemistry, the 207Pb/206Pb and 208Pb/206Pb isotopic ratios were measured by multiple-collector inductively coupled plasma mass spectrometry (MC-ICP-MS). Isotope fractionations > 0.05‰ have been found. The conventional equilibrium mass-dependent isotope effect estimated by an ab initio calculation was smaller than the Pb isotope fractionation experimentally obtained. Conventional mass-dependent isotope fractionation is not a valuable explanation for our results. The nuclear field shift effect, which results from the isotopic change in the nuclear size and shape, was also estimated by an ab initio method combined with a finite nucleus model. The nuclear field shift effect calculated was in agreement with our experimental results. Therefore, this study reports the first nuclear field shift effect of Pb in an equilibrium ligand exchange reaction.

scholarly journals Nuclear field shift effect in isotope fractionation of thallium

2012 ◽  
Vol 296 (1) ◽  
pp. 261-265 ◽  
Author(s):  
Toshiyuki Fujii ◽  
Frédéric Moynier ◽  
Arnaud Agranier ◽  
Emmanuel Ponzevera ◽  
Minori Abe ◽  
...  
Keyword(s):  
Isotope Fractionation ◽  
Nuclear Field ◽  
Field Shift ◽  
Shift Effect

scholarly journals The nuclear field shift effect in chemical exchange reactions

2009 ◽  
Vol 267 (3-4) ◽  
pp. 139-156 ◽  
Author(s):  
Toshiyuki Fujii ◽  
Frédéric Moynier ◽  
Francis Albarède
Keyword(s):  
Chemical Exchange ◽  
Exchange Reactions ◽  
Nuclear Field ◽  
Field Shift ◽  
Shift Effect

scholarly journals Nuclear field shift effect in the isotope exchange reaction of cadmium using a crown ether

2009 ◽  
Vol 267 (3-4) ◽  
pp. 157-163 ◽  
Author(s):  
Toshiyuki Fujii ◽  
Frédéric Moynier ◽  
Philippe Telouk ◽  
Francis Albarède
Keyword(s):  
Crown Ether ◽  
Exchange Reaction ◽  
Isotope Exchange ◽  
Isotope Exchange Reaction ◽  
Nuclear Field ◽  
Field Shift ◽  
Shift Effect

Nuclear Field Shift Effect in the Isotope Exchange Reaction of Chromium(III) Using a Crown Ether

2002 ◽  
Vol 106 (30) ◽  
pp. 6911-6914 ◽  
Author(s):  
Toshiyuki Fujii ◽  
Daisuke Suzuki ◽  
Katsubumi Gunji ◽  
Kazuo Watanabe ◽  
Hirotake Moriyama ◽  
...  
Keyword(s):  
Crown Ether ◽  
Exchange Reaction ◽  
Isotope Exchange ◽  
Isotope Exchange Reaction ◽  
Nuclear Field ◽  
Field Shift ◽  
Shift Effect

scholarly journals Isotope fractionation of palladium in chemical exchange reaction

2011 ◽  
Vol 1 (1) ◽  
pp. 339-344
Author(s):  
T. Fujii ◽  
F. Moynier ◽  
A. Agranier ◽  
E. Ponzevera ◽  
M. Abe
Keyword(s):  
Inductively Coupled Plasma ◽  
Isotope Fractionation ◽  
Chemical Exchange ◽  
Atomic Mass ◽  
Inductively Coupled ◽  
Field Shift ◽  
Plasma Mass Spectrometry ◽  
Shift Effect ◽  
Two Phases ◽  
Solvent Extraction Technique

Abstract Palladium isotopes were fractionated by the solvent extraction technique with a crown ether. After purification by ion-exchange chemistry, the isotopic ratios of 105Pd/106Pd, 108Pd/106Pd, and 110Pd/106Pd were determined by multiple-collector inductively coupled plasma mass spectrometry. Isotope fractionations between the two phases were found to be larger than 0.1‰. The isotope fractionation of the odd atomic mass isotope (105Pd) showed a deviation from that estimated from the even atomic mass isotopes (106Pd, 108Pd, and 110Pd). The mass-independent isotope fractionation found was attributable to the nuclear field shift effect. The quantum chemical calculations for the different Pd species supported the validity of the isotope fractionation factors obtained.

Nuclear Field Shift Effect of Chromium(III) in Repeated Extraction Using a Crown Ether

2008 ◽  
Vol 26 (2) ◽  
pp. 100-112 ◽  
Author(s):  
Toshiyuki Fujii ◽  
Daisuke Suzuki ◽  
Hajimu Yamana
Keyword(s):  
Crown Ether ◽  
Nuclear Field ◽  
Field Shift ◽  
Shift Effect
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