Reticular design and crystal structure determination of covalent organic frameworks

Abstract

This article describes the conceptual basis of rational design in COF chemistry and comprehensively discusses the crystal structure determination of COFs using the topological approach, X-ray diffraction, and 3D electron diffraction.

A carbonyl-rich covalent organic framework as a high-performance cathode material for aqueous rechargeable zinc-ion batteries

“…Covalent organic frameworks (COFs), 32–36 an emerging class of crystalline and porous polymeric materials, often possess high chemical stability, well defined porosity, and ability to predictably organize redox-active groups. The unique features of COFs endow them with great advantages and potential for application as electrode materials for rechargeable batteries.…”

A Cubic 3D Covalent Organic Framework with nbo Topology

“…Covalent organic frameworks (COFs) have attracted interest for applications such as gas storage and separation, catalysis, optoelectronics, sensing, and drug delivery. − Like metal–organic frameworks (MOFs), COFs can be designed in a bottom-up manner from molecular building blocks using reticular chemistry principles. , Reticular chemistry allows us to target COFs of a specific topology, or net, by selecting building blocks of the required geometry and then connecting them through condensation reactions that fix them into a specific framework arrangement. , A representative example of reticular COF design is the synthesis of 2D imine COF-346, where a complex multinary tth topology was formed by precisely selecting building blocks that meet the essential geometry and metric requirements for that net . While 2D COFs are widely explored, the design and realization of 3D COFs is more challenging, and this goal has received increasing attention in recent years. − Two strategies are commonly used to target 3D COFs. One is to use high-connectivity, polyhedral organic building blocks, such as organic cages .…”

Covalent Organic Frameworks as Emerging Platforms for CO2 Photoreduction

“…Rational design of COFs using reticular chemistry has been well-discussed in the literature by Yaghi, Jiang, Bein, Banerjee, and Lotsch, etc. We have recently reported the reticular design and crystallography in COFs . We encourage readers, along with this work, to read the aforementioned works to comprehend the exquisiteness of COF chemistry.…”

“…We have recently reported the reticular design and crystallography in COFs. 45 We encourage readers, along with this work, to read the aforementioned works to comprehend the exquisiteness of COF chemistry. Understanding of principle designs of COFs lies at the heart of reticular chemistry interpretation, which includes the basic concepts of topology, secondary building unit (SBU), vertex, edge, natural tiling, topological deconstruction, etc.…”