1,5-二溴-3-氧杂戊烷,1,8-二溴-3,6-二氧杂辛烷和1,11-二溴-3,6,9-三氧杂十二烷与硫酚和2-氨基硫酚的相转移催化亲核取代反应分别提供无环受体α,ω-双(苯硫基/ 2-氨基苯硫基)氧杂烷烃(6-11)。1,8-双(2-氨基苯硫基)-3,6-二氧杂辛烷(10)与乙酸酐和间苯二甲酰氯反应,分别提供无环(12)和大环(14)受体。α,ω-(2-氨基苯硫基)氧杂烷烃(9-11)与二氯硫代二甘醇和2,6-二羰基吡啶的盐酸进行分子间环脱氯化氢作用,以提供各自的大环16-18和20-22。无环受体6-11表现出与Ag +和Pb 2+的强络合作用,对Ag +的特异性较弱。12中胺单元向酰胺的转化显着降低了络合,但提高了Ag + / M z +的选择性。通过将无环受体12转变成其环状类似物来形成连接位点,以及在环状受体16-18和20-22中存在其他连接位点,不仅恢复了提取能力,而且还导致了较高的Ag
Synthesis and characterization of a novel (E,E)-dioxime and its mono- and heterotrinuclear complexes containing a 21-membered trioxadithiadiaza macrocycle
New heavy metal ion-selective macrocyclic ligands with mixed-donor atoms and their extractant properties
作者:Halıt Kantekın、Meltem B. Kiliçaslan、Fatma Ağin、Hakan Alp、Ümmühan Ocak
DOI:10.1080/00958972.2010.494303
日期:2010.6.10
Synthetic procedures for new macrocyclic diamides with N2S4O3- and N2S5O3-donors were given. The corresponding macrocyclic ligands were prepared by reaction of NaBH4 with the macrocyclic diamides in the presence of boron triflouride ethyl etherate in dry tetrahydrofuran. The solvent extraction method was used to evaluate metal-ion binding properties of the new ligands. The values of the extraction constants (log Kex) and the complex compositions were determined for the extracted complexes. The solvent extraction experiments suggested that the reduced N2S5O3-donor macrocycle has Ag+ selectivity compared to Pb2+, Co2+, Ni2+, Mn2+, and Cd2+ for chloroform as organic solvent.