自聚合物发现以来,科学家对其结构始终存在争论。在Hermann Staudinger提出大分子概念前,学界普遍认为聚合物源于小颗粒或分子的胶体聚集。自1920年起,聚合物和大分子被认为是通过共价键将单体在二维或三维空间连接构成的材料。尽管大分子链间超分子相互作用的重要性不言而喻,但当时难以设想基于小分子相互作用可构建聚合物材料。超分子化学的突破性进展表明,通过强方向性次级相互作用可实现小分子构建聚合物材料——超分子聚合物领域由此诞生。通过控制分子片段间的超分子相互作用,设计具有响应性与动态功能的新型功能材料变得更为容易。其中,对分子时空位置的控制是获得目标功能的关键。本次讲座将探讨手性在时空维度中的典型案例及涌现机制,同时聚焦非共价合成中的分子相互作用,探讨其在自旋过滤、生物材料及OLED等领域的应用前景。
Since the discovery of the first polymers, scientists have debated their structures. Before Hermann Staudinger published the brilliant concept of macromolecules, it was generally assumed that the properties of polymers were based on the colloidal aggregation of small particles or molecules. Since 1920, polymers and macromolecules have been synonymous with each other; i.e. materials made by means of many covalent bonds that connect monomers in 2 or 3 dimensions. Although supramolecular interactions between macromolecular chains are clearly important, e.g. in nylons, it was unthinkable to imagine polymeric materials based on the interaction of small molecules. Breakthroughs in supramolecular chemistry have shown that polymer materials can be made by small molecules using strong directional secondary interactions; the field of supramolecular polymers was born. In a sense, we have come full circle [1]. By controlling the supramolecular interactions between molecular fragments, it became easier to design systems materials with unconventional responsive behavior and dynamic functionalities. In all cases, control over the position of the molecules in time and space is essential to achieve the required functionality. In our group we focus on the emergence of homochirality in time and space and some examples of this challenge will be discussed in the lecture. We use this to design supramolecular materials and chiral systems with highly ordered morphologies that change their properties on the action of light, pressure, temperature, or the addition of chemicals. On the other hand, applications in spin filtering, biomaterials and OLEDs will be discussed with a continues focus on the molecular interactions using non-covalent synthesis [2].
嘉宾介绍
E.W. “Bert” Meijer
美国国家科学院外籍院士E.W. “Bert” Meijer,荷兰埃因霍温理工大学杰出教授和超分子化学领域的著名科学家,美国国家科学院外籍院士、欧洲科学院院士和荷兰皇家科学院院士。在格罗宁根大学获得博士学位后,他在工业界(飞利浦和帝斯曼)工作十年。1991年受聘于埃因霍温理工大学,期间也在美因茨、圣巴巴拉和悉尼兼任客座职务。E. W. Meijer教授担任《Journal of the American Chemical Society》等多家学术期刊编委。他曾获多项殊荣,包括Spinoza奖(2001年)、美国化学会高分子化学奖(2006年)、美国化学会Cope学者奖(2012年)、Prelog奖章(2014年)、名古屋金奖(2017年)以及德国化学会Staudinger奖(2022年)。
