周惠久论坛|Crystalline Molecular Machines
2020-01-02 09:48:49

邀请讲座人:朱克龙  教 授

简介:1982年9月。2004-2009年在浙江大学化学系获得博士学位,2009年起在加拿大温莎大学从事博士后研究工作,于2016年加入中山大学,现为化学学院教授,博导。先后入选中山大学“百人计划”、国家第十三批 “青年千人”计划,广东省“珠江人才计划”青年拔尖人才。长期从事于超分子化学与材料领域研究,在设计与合成新型超分子主体、机械互锁分子及配位聚合物材料(MOF)等方面具有丰富经验。主持过多项国家自然科学基金的研究,至今已在Nature Chemistry. (3)、J. Am. Chem. Soc. (2)、Angew. Chem. Int. Ed. (3) 等国际顶级化学期刊杂志上发表了关于金属有机框架及机械互锁分子的研究性论文和综述文章30多篇,撰写英文专著2章。研究成果包括与加拿大温莎大学的Stephen J. Loeb教授合作开发的UWDMs(University of Windsor Dynamic Materials)系列材料,被Nature、C&EN、ChemistryWorld等亮点评述。

【报告】Organizing Mechanically Interlocked Molecules (MIMs) into Crystalline Materials -- A Step Further in Molecular Machines

时间: 2020年1月3日  上午10:00

地点: 仲英楼 pt老虎机 第一会议室

摘要:The dynamics of mechanically interlocked molecules (MIMs) such as rotaxanes and catenanes have been studied in solution as examples of rudimentary molecular switches and machines, but in this medium, the molecules are randomly dispersed and their motion incoherent. As a strategy for achieving a higher level of molecular organization, we have constructed a series of metal–organic framework materials (UWDMs) using [2]rotaxanes as the organic linker and metal ions (Cu, Zn, Zr…) units as the nodes. Activation of the as-synthesized materials allows the soft macrocyclic rings of the [2]rotaxanes to rotate or undergo a rapid to-and-fro (shuttling) motion along a “crossing bar” built between struts of the interpenetrated frameworks. Variable-temperature 13C and 2H and 13C 2D EXSY experiment are used to characterize the nature and rate of the dynamic processes occurring inside these unique materials. These results provide a blueprint for the future creation of solid-state molecular switches and molecular machines based on mechanically interlocked molecules.