单氧代-二硒烷基-1, w-二氧取代杯[4]衍生物的合成,结构及萃取性能研究

Novel macrocyclic monooxa-diselkylene-1,ω-dioxy substituted calix4]arene derivatives 1a-5a were synthesized by the reaction of calix4]arene dibromides 1-5 with the disodium salt of bis（2-selenylethyl）ether in the yields between 28% and 64%. Their structures were characterized by proton and carbon NMR spectra. X-Ray structure analysis of la further confirmed the cone conformation of compounds 1a-5a. An interesting host-guest complex of la with dichloromethane via CH/π and C1/π interactions was elucidated. Extraction experiments showed that these novel monooxa-diselkylene-1,ω-dioxy substituted calix4]arene derivatives 1a-5a had strong extraction ability towards mercury ion. The interaction of Hg^2＋with the calix ligand has also been investigated by 1^H NMR titration.

Synthesis,Structure and Ion Extraction Properties of Novel Monooxa‐diselkylene‐1,ω‐dioxy Substituted Calix[4]arene Derivatives

Novel macrocyclic monooxa‐diselkylene‐1,ω‐dioxy substituted calix4]arene derivatives 1a – 5a were synthesized by the reaction of calix4]arene dibromides 1 – 5 with the disodium salt of bis(2‐selenylethyl)ether in the yields between 28% and 64%. Their structures were characterized by proton and carbon NMR spectra. X‐Ray structure analysis of 1a further confirmed the cone conformation of compounds 1a – 5a . An interesting host‐guest complex of 1a with dichloromethane via CH/π and Cl/π interactions was elucidated. Extraction experiments showed that these novel monooxa‐diselkylene‐1,ω‐dioxy substituted calix4]arene derivatives 1a – 5a had strong extraction ability towards mercury ion. The interaction of Hg²⁺with the calix ligand has also been investigated by ¹H NMR titration.