Preparation of Microporous Solids from Molecular Building Blocks

从分子构件制备微孔固体

• 批准号: 9522303
• 负责人: Omar Yaghi
• 金额: $ 22.5万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-12-01 至 1998-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9522303&HistoricalAwards=false
• 关键词: Preparation; Microporous; Solids; Molecular; Building

This project, funded by the Inorganic, Bioinorganic and Organometallic Chemistry Program, will support the research of Professor Omar Yaghi of Arizona State University on the synthesis of new porous solids from soluble molecular building blocks. The focus of the project is the development and understanding of two fundamental issues that are relevant to the preparation of solids from molecular building blocks: 1) how to control the relative orientation of the molecular components so that the resulting structure has the desired structure, stability and physical properties, and 2) how to obtain the solid product in crystalline form so that its structure is readily determined. The general method to be used will involve the room-temperature condensation polymerization of inorganic clusters or suitably functionalized coordination compounds using polymeric matrices as diffusion and reaction media for addition copolymerization and condensation polymerization reactions. The anticipated zeolitic type structures are expected to have voids that can accommodate guest molecules or ions and thus to be useful in separations, ion-exchange, and catalysis. In principle, these framework structures can be chemically modified and manipulated to predictably vary their properties. The term porous solid applies to a class of network solids that contain channels and voids that are comparable in size to many small molecules and ions. Such species often may diffuse into these solids to be exchanged for an existing ion or to be otherwise retained as a result of intermolecular interactions. Such solids are widely used industrially for the selective adsorption and catalytic transformation of molecular structures, particularly through acid catalyzed pathways. Such materials are usually synthesized by high temperature processes that often do not provide crystalline products. This research project will attempt the synthesis of porous solids by formation of bonds between small pre-formed fragments of the desired structure through various types of room-temperature, condensation polymerization reactions. Polymeric matrices will be used as reaction media to prevent the formation of more dense structures and to slow the condensation process such that crystals are more likely to be formed. The materials that result from this project may be useful in separations technology and in catalysis.

该项目由无机，生物无机和有机生物学资助， 化学计划，将支持奥马尔·亚吉教授的研究， 亚利桑那州州立大学的新的多孔固体的合成， 可溶性分子构建块。 该项目的重点是 发展和理解两个相关的基本问题 涉及从分子结构单元制备固体：1）如何 控制分子组分的相对取向， 所得结构具有所需的结构、稳定性和物理性质 性质，以及2）如何获得结晶形式的固体产物， 它的结构很容易确定。 使用的一般方法 将涉及室温缩聚反应， 无机簇或适当官能化的配位化合物 使用聚合物基质作为扩散和反应介质 共聚和缩聚反应。 的 预期的沸石型结构预期具有空隙， 容纳客体分子或离子并因此可用于分离， 离子交换和催化。 原则上，这些框架结构 可以被化学修饰和操纵，以可预测地改变它们的 特性. 术语多孔固体适用于一类含有以下物质的网状固体： 通道和空隙的大小与许多小分子相当 和离子。 这样的物质通常可以扩散到这些固体中， 与现有离子交换或以其他方式保留， 分子间相互作用 这种固体在工业上广泛使用 用于分子的选择性吸附和催化转化 结构，特别是通过酸催化途径。 此类材料 通常通过高温工艺合成， 提供结晶产品。 该研究项目将尝试 通过在小的预成型材料之间形成键来合成多孔固体 所需结构的片段通过各种类型的 室温缩聚反应。 聚合物 基质将用作反应介质，以防止形成更多的 致密的结构，并减缓冷凝过程， 更有可能形成。 由此产生的材料 该项目可能在分离技术和催化方面很有用。