Investigation on oxidation states of rhenium in Re-HEDP

Investigation on oxidation states of rhenium in Re-HEDP 1 first-author 1 1 1 1 Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900 Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900 The oxidation states of rhenium in Re-HEDP (hydroxyethylidene diphosphonate) were measured by the methods of extraction and potentiometric titration. The oxidation state of rhenium in Re-HEDP was mostly +4 valence, and the Re(Ⅳ)-HEDP was oxidized to Re(Ⅴ)-HEDP when it was titrated by I 3 - at pH 2.0. In the reduction system of Vc+Sn 2+ , ReO 4 - was only reduced by Sn 2+ , but Vc was oxidized earlier than Sn 2+ when it was titrated by I 3 - . Rhenium HEDP (hydroxyethylidene diphosphonate) Oxidation state References Luo S Z , Qiao J , Pu M F et al . Nucl Sci Tech , 1996 , 7 ( 4 ): 177 - 179 Nucl Sci Tech Luo S Z , Pu M F , Qiao J et al . J Radioanal Nucl Chem , 1992 , 160 ( 2 ): 443 - 448 J Radioanal Nucl Chem Tji T G , Vink H A , Gelsema W J et al . Int J Appl Radiat Isot , 1990 , 41 ( 1 ): 17 - 28 Int J Appl Radiat Isot Qiao J , Luo S Z , Wang W J et al . J Nucl Radio Chem (in Chinese) , 1999 , 21 ( 2 ): 83 - 87 J Nucl Radio Chem (in Chinese) Eisenhut M . Int J Appl Radiat Isot , 1982 , 33 ( 2 ): 99 - 103 Int J Appl Radiat Isot O614.432 Supported by the National Natural Science Foundation of China (29971027) 2002-05-15 2003-08-01 2021-01-19 2003 Nuclear Science and Techniques 03 14