Three-Dimensional Anionic Cyclodextrin-Based Covalent Organic Frameworks

Yuanyuan Zhang; Jiyun Duan; Dou Ma; Pengfei Li; Siwu Li; Haiwei Li; Junwen Zhou; Xiaojie Ma; Xiao Feng; Bo Wang

doi:10.1002/anie.201710633

Three-Dimensional Anionic Cyclodextrin-Based Covalent Organic Frameworks

Angew Chem Int Ed Engl. 2017 Dec 18;56(51):16313-16317. doi: 10.1002/anie.201710633. Epub 2017 Nov 22.

Authors

Yuanyuan Zhang¹, Jiyun Duan¹, Dou Ma¹, Pengfei Li¹, Siwu Li¹, Haiwei Li¹, Junwen Zhou¹, Xiaojie Ma¹, Xiao Feng¹, Bo Wang¹

Affiliation

¹ Department Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science, Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China.

PMID: 29106041
DOI: 10.1002/anie.201710633

Abstract

Three-dimensional covalent organic frameworks (3D COFs) are promising crystalline materials with well-defined structures, high porosity, and low density; however, the limited choice of building blocks and synthetic difficulties have hampered their development. Herein, we used a flexible and aliphatic macrocycle, namely γ-cyclodextrin (γ-CD), as the soft struts for the construction of a polymeric and periodic 3D extended network, with the units joined via tetrakis(spiroborate) tetrahedra with various counterions. The inclusion of pliable moieties in the robust open framework endows these CD-COFs with dynamic features, leading to a prominent Li ion conductivity of up to 2.7 mS cm^-1 at 30 °C and excellent long-term Li ion stripping/plating stability. Exchanging the counterions within the pores can effectively modulate the interactions between the CD-COF and CO₂ molecules.

Keywords: covalent organic frameworks; cyclodextrin; ionic structures; microporous materials; three-dimensional structures.

Publication types

Research Support, Non-U.S. Gov't