• 作者： 鄭華生; 徐健民; 陳明媛; 陸珩
• 作者服務機構： Institute of Chemistry, Tsing Hua University, Hsinchu, Taiwan, R.O.C.
• 中文摘要： The Mossbauer parameters of frozen solutions of 0.05M Sn(H/sub 2/O)(CIO/sub 4/)/sub 2/, Sn(H/sub 2/O)/sub 2/(CIO/sub 4/)/sub 4/, SnCl/sub 4/.bcdot.5H/sub 2/O, SnBr/sub 4/ and Na/sub 2/SnBr/sub 6/ [designated as Sn(H/sub 2/O)/sup N-N'/L/sub N'//sup (Z-N')+/, in which N'.ltoreq.N; N'=N=6 for SnBr/sub 6//sup 2-/, N'=4 with N=6 for Sn(H/sub 2/O)/sub 2/(CIO/sub 4/)/sub 4/, Sn(H/sub 2/O)/sub 2/Cl/sub 4/ and Sn(H/sub 2/O)/sub 2/Br/sub 4/, and N'=2 with N=3 for Sn(H/sub 2/O)(CIO/sub 4/)/sub 2/] were found to be linearly related to the concentration ( c) of perchloric acid. These facts were attributed to a change in activity of water (a/sub w/). At c=0, a/sub w/=1, the Mossbauer parameters corresponded to Sn(H/sub 2/O)/sun N//sup z+/,whereas at c=11.6M (70%), they corresponded to the crystalline state of Sn(H/sub 2/O)/sup N-N'/L/sub N'//sup (Z-N')+/. It was shown that even CIO/sub 4//sup -/ ion could coordinate to tin atom in perchloric acid. The degree of association at any given c could be estimated very easily through the relation .nbar./N'=0.086c. It was emphasized that the activity of water should be taken into account when equilibrium studies were carried out in perchloric acid solutions. Further corrections for perchlorate complex formation should be made, if a very weak ligand was added into metal perchlorate solutions.
• 英文摘要： --
• 中文關鍵字： Tin-119 Mossbauer effect; frozen solutions; perchloric acid; complex formation.
• 英文關鍵字： Tin-119 Mossbauer effect; frozen solutions; perchloric acid; complex formation.