文献类型：期刊文献

英文题名：Covalent Organic Frameworks: Reversible 3D Coalesce via Interlocked Skeleton-Pore Actions and Impacts on π Electronic Structures

作者：Li, Juan[1];Liu, Lili[1];Tang, Xuan[2];Bai, Xi[3];Liu, Yukun[1];Wang, Dongsheng[1];Tao, Shanshan[4];Liu, Ruoyang[4];Jiang, Donglin[4]

机构：[1]Shanxi Univ, Inst Crystalline Mat, Taiyuan 030006, Peoples R China;[2]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Feringa Nobel Prize Scientist Joint Res Ctr, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[3]Changzhi Med Coll, Pharmaceut Dept, Changzhi 046000, Peoples R China;[4]Natl Univ Singapore, Fac Sci, Dept Chem, Singapore 117543, Singapore

年份：2023

卷号：145

期号：48

起止页码：26383

外文期刊名：JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

收录：;EI(收录号：20234915176445);WOS:【SCI-EXPANDED(收录号:WOS:001123033900001)】；

基金：J.L. gratefully acknowledges financial support from the National Natural Science Foundation of China (21805173, 52273208), the Research Project Supported by Shanxi Scholarship Council of China (2022-004), the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (2021L354), and the Natural Science Foundation of Shanxi Province (202203021211289, 202303021211109).D.J. acknowledges the Singapore Ministry of Education (MOE) Tier 2 grants (MOE-T2EP10220-0004 and MOE-T2EP10221-0006), MOE Tier1 grants (A-0008368-00-00 and A-0008369-00-00),and an A*star grant (U2102d2004).

语种：英文

外文关键词：Carboxylic acids - Energy gap - Hydrogen - Hydrogen bonds - Light absorption - Musculoskeletal system - Pore pressure - Quay walls - Water absorption

摘要：Covalent organic frameworks (COFs) create extended two-dimensional (2D) skeletons and aligned one-dimensional (1D) channels, constituting a class of novel pi architectures with predesignable structural ordering. A distinct feature is that stacks of pi building units in skeletons shape the pore walls, onto which a diversity of different units can be assembled to form various pore interfaces, opening a great potential to trigger a strong structural correlation between the skeleton and the pore. However, such a possibility has not yet been explored. Herein, we report reversible three-dimensional (3D) coalescence and interlocked actions between the skeleton and pore in COFs by controlling hydrogen-bonding networks in the pores. Introducing carboxylic acid units to the pore walls develops COFs that can confine water molecular networks, which are locked by the surface carboxylic acid units on the pore walls via multipoint, multichain, and multidirectional hydrogen-bonding interactions. As a result, the skeleton undergoes an interlocked action with pores to shrink over the x-y plane and to stack closer along the z direction upon water uptake. Remarkably, this interlocked action between the skeleton and pore is reversibly driven by water adsorption and desorption and triggers profound effects on pi electronic structures and functions, including band gap, light absorption, and emission.