US-Turkey Cooperative Research: Calixarene Based Receptors for Site Reclamation by the Removal of Toxic Heavy Metals

0111170 RoundhillDescription：该项目支持德克萨斯州拉伯克得克萨斯理工大学化学系D.M.RoundHill博士和土耳其科尼亚Selcuk大学化学系Mustafa Yilmaz博士之间的合作项目。合作的重点是合成新的化学修饰的杯芳烃，并将其用作重金属离子的液-液相萃取剂。特别是，目前正在造成环境问题的金属离子将成为目标。研究人员计划研究基于杯芳烃的受体，该受体设计用于重金属清除应用。这项工作包括产生新的离子载体聚合物系统，对Cs和选定的阳离子和阴离子具有特定的结合策略。具体地说，将合成被称为杯冠-6聚合物的杯芳烃，并将其并入共聚树脂中。这样得到的材料将进行表征，并将用于液-液萃取，对水相金属进行等体积的金属和萃取剂混合物分析。固-液萃取采用分批柱法测定。工作计划包括三个顺序的组成部分：电离团的合成、电离团的特征以及将评估电离团提取金属离子能力的提取研究。范围：该项目支持两位拥有互补专业知识和资源的知名科学家之间的合作，以研究重要的材料和环境问题。这项研究具有重大的环境影响，因为它可能导致新的和改进的方法，以消除重金属污染的地点。这两个小组都独立研究了杯芳烃对金属离子的络合作用，并将利用杯芳烃改性聚合物对重金属的液相萃取剂进行研究。Yilmaz博士是一名合成有机化学家，在杯芳烃化学方面拥有丰富的经验，而朗德希尔博士是一名无机化学家，他对重金属离子的络合化学有着丰富的知识。拟议的合作努力将建立更牢固的国际联系，并提供科学利益。该项目符合支持共同感兴趣领域的合作研究的INT目标。

0111170RoundhillDescription: This project supports a collaborative project between Dr. D.M. Roundhill, Department of Chemistry, Texas Tech University, Lubbock, Texas and Dr. Mustafa Yilmaz, Department of Chemistry, Selcuk University, Konya, Turkey. The focus of the collaboration is the synthesis of new chemically modified calixarenes, and their use as liquid-liquid phase extractants for heavy metal ions. In particular, metal ions will be targeted that are presently causing environmental problems. The researchers plan to study calixarene-based receptors designed for heavy metal clean up applications. The work includes the generation of new ionophore polymer systems with specific binding strategies for Cs+ and selected cations and anions. Specifically the calixarene known as calixcrown-6 polymer will be synthesized and incorporated into copolymer resins. The material thus derived will be characterized, and will be used in liquid-liquid extractions with equal volume mixtures of metal and extractant analyzed for aqueous phase metals. The solid-liquid extraction will be determined by batchwise column methods. The plan of work involves three sequential components: synthesis of ionophores, characterization of ionophores and extraction studies that will assess the ability of the ionophores to extract metal ions. Scope: The project supports collaboration between two well-known scientists who have complementary expertise and resources to investigate an important material and environmental problem. There are substantial environmental implications of the research, as it may lead to new and improved means for decontamination of heavy metal polluted sites. Both groups have independently studied the complexation of metal ions by calixarenes and both will conduct research on liquid phase extractants of heavy metals with the use of calixarene modified polymers. Dr. Yilmaz is a synthetic organic chemist with extensive experience in calixarene chemistry, and Dr. Roundhill is an inorganic chemist who has considerable knowledge of the complexation chemistry of heavy metal ions. The proposed collaborative effort will establish stronger international ties and provide scientific benefits. This project meets the INT objective of supporting collaborative research in areas of mutual interest.