Complexes of Ag⁺ with mixed donor phenanthroline-containing macrocycles: spectrofluorimetric, spectrophotometric, conductometric and potentiometric studies

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• 作者：Greta De Filippo ; Francesco Demartin ; Aless ; ra Garau ; Vito Lippolis ; Abdollah Yari ; Ardeshir Shokrollahi ; Mojtaba Shamsipur
• 关键词：Silver ; Macrocyclic ligands ; Spectrofluorimetric and spectrophotometric titrations ; X-ray diffraction
• 刊名：Inorganica Chimica Acta
• 出版年：2005
• 出版时间：10 February 2005
• 年：2005
• 卷：358
• 期：3
• 页码：801-807
• 全文大小：386 K

文摘

The reactions of Ag⁺ with five mixed donor phenanthroline-containing macrocycles (L¹–L⁵) having N₂S₃-, N₂S₂O-, N₂S₂-, N₃S₂-, and N₄S₂-donor sets, respectively, have been studied in MeCN by spectrofluorimetric, spectrophotometric, conductometric and potentiometric methods. All ligands form 1:1 [Ag(L)]⁺ complexes, and in the case of L⁴ and L⁵, formation of 1:2 [Ag(L)₂]⁺ species is also observed. The corresponding formation constants have been evaluated and their values allow a deeper insight into the role played by complexation process in the potentiometric selectivity for Ag⁺ of membrane electrodes (ISE), and in the selective transport of Ag⁺ through supported liquid membrane (SLM) systems based on these ligands. The X-ray crystal structure of the complex [Ag(L⁴)]BF₄ is also reported.