Synthesis of Bis-substituted Calix[4]arenes and Mechanism of Substituents Effect on K^+ and Hg^(2+) Ions Transports through Liquid Membrane  

作　　者：陶旭晨 李磊 何瑾馨 

机构地区：[1]Auhui Provincial Key Laboratory of Textile Fabric,Anhui Polytechnic University [2]College of Chemistry and Chemical Engineering,Donghua University

出　　处：《Journal of Donghua University(English Edition)》2011年第6期621-623,共3页东华大学学报（英文版）

基　　金：Natural Science Foundation of Education Department of Anhui Province,China(No. KJ2011B021)

摘　　要：New calix[4]arene derivatives containing nitro,amino and benzoyl in the upper and lower rims of molecule were successfully synthesized.Their effectiveness towards K+ and Hg2+ across bubbling liquid membrane(BLM) was examined.For K+ ion transfer,preserving phenolic hydroxyl in the lower rim of calix[4]arene could enhance its transport ability.When benzoyl replaced phenolic hydroxyl,the transport would fall off,because benzoyl caused steric hindrance on the K+ transfer.The study also revealed that the group having the electron-withdrawing conjugative effect on phenolic hydroxyl,-NO2 in the upper rim of calix[4]arene,made transport ability of calix[4]arene fall off.On the contrary,-NH2 that had electron-repulsive conjugative effect enhanced the transport ability of the compound.For Hg2+ ion,only -NH2 in the upper rim of calix[4]arenes had high affinity for it and contributed to Hg2+ transfer.Transport amount of Hg2+ ion increased with increasing calix[4]arene5 concentration and ΔpH in BLM.New calix[4]arene derivatives containing nitro,amino and benzoyl in the upper and lower rims of molecule were successfully synthesized.Their effectiveness towards K^＋ and Hg^2＋ across bubbling liquid membrane（BLM） was examined.For K^＋ ion transfer,preserving phenolic hydroxyl in the lower rim of calix[4]arene could enhance its transport ability.When benzoyl replaced phenolic hydroxyl,the transport would fall off,because benzoyl caused steric hindrance on the K^＋ transfer.The study also revealed that the group having the electron-withdrawing conjugative effect on phenolic hydroxyl,-NO2 in the upper rim of calix[4]arene,made transport ability of calix[4]arene fall off.On the contrary,-NH2 that had electron-repulsive conjugative effect enhanced the transport ability of the compound.For Hg^2＋ ion,only -NH2 in the upper rim of calix[4]arenes had high affinity for it and contributed to Hg^2＋ transfer.Transport amount of Hg^2＋ ion increased with increasing calix[4]arene5 concentration and ΔpH in BLM.

关 键 词：arene derivatives substituting groups liquid mettubrane transport polymer MECHANISM 

分 类 号：O658[理学—分析化学]