RUI: Development of A Synthetic Platform for Highly Tunable Cationic Porous Materials

非技术摘要：该项目旨在开发新的合成概念和方法，以发明浸渍有移动的阴离子的结晶多孔材料。均匀和可调的孔径，连同对骨架的电荷和官能度的控制一起结合联合收割机，使得能够在阴离子交换、分离、检测和传导中实现新的和更有效的应用。大自然厌恶阳离子框架，并提出各种中和方法来防止它们的形成。这个项目使用新的概念和策略来对抗这种自然趋势，主动和先发制人。作为一所拥有大量学生（包括来自代表性不足群体的学生）的本科院校，PI努力利用NSF的支持，通过建立一个高度激励和重要的研究项目，并通过发展最先进的综合和工具能力，为不同背景的学生拓宽学习机会，来促进学生的教学和培训。技术摘要：该项目旨在开发新的合成概念和方法，以创建具有带正电荷的框架的多孔材料，该框架将均匀和可调的孔径与移动的阴离子集成在一起，用于阴离子交换，螯合，分离，传感以及快速阴离子传导等应用。它涉及材料设计中的基本问题，如控制负性和中性官能团之间的比例以及混合价或异金属体系中金属离子之间的比例。这些问题对于骨架电荷性质的控制及其应用至关重要。核心战略涉及设计具有阳离子倾向的簇型结构构件，同时发明先进的方法以主动防止此类单元可能的中和。使用各种方法来调整孔径和性质，以基于分子和离子的尺寸、形状和电荷来增强工艺选择性。该项目整合了各种学生培训活动，从化学合成，晶体生长，晶体结构分析和性能表征，目标是扩大本科生和研究生在化学研究中的参与，并促进材料科学的多元化学生群体。

NON-TECHNICAL Abstract: This project seeks to develop new synthetic concepts and methods to invent crystalline porous materials impregnated with mobile anions. The uniform and tunable pore size, together with the control over the charge and functionality of the framework combine to enable new and more efficient applications in anion exchange, separation, detection, and conduction. Nature abhors cationic frameworks and comes out with various neutralization ways to prevent their formation. This project combats this nature's tendency using novel concepts and strategies to counter such natural tendency proactively and preemptively. Being at an undergraduate institution with a large population of students including those from underrepresented groups, the PI strives to utilize the NSF support to promote teaching and training of students by establishing a highly stimulating and important research project and by developing the state-of-the-art synthetic and instrumental capability to broaden learning opportunities for students with diverse backgrounds.TECHNICAL Abstract: The project seeks to develop new synthetic concepts and methods to create porous materials with the positively charged framework integrating uniform and tunable pore size with mobile anions for applications such as anion exchange, sequestration, separation, sensing, as well as fast anion conduction. It deals with fundamental issues in materials design such as the control of ratio between negative and neutral functional groups and the ratio between metal ions in mix-valence or heterometallic systems. Such issues are fundamental to the control of the framework charge property and their applications. The core strategy involves designing cluster-type structural building blocks with propensity for being cationic and simultaneously inventing advanced methods to proactively prevent possible neutralization of such units. Various methods are used to tune the pore size and properties to enhance process selectivity based on size, shape, and charge of molecules and ions. The project integrates a variety of student-training activities ranging from chemical synthesis, crystal growth, to crystal structure analysis and property characterizations with the goal to broaden the participation of undergraduate and graduate students in chemical research and to promote a diverse student population in materials sciences.