From Discrete Molecular Cages to a Network of Cages Exhibiting Enhanced CO2 Adsorption Capacity

Lei Zhang; Long Xiang; Cheng Hang; Wenlong Liu; Wei Huang; Yichang Pan

doi:10.1002/anie.201702399

From Discrete Molecular Cages to a Network of Cages Exhibiting Enhanced CO₂ Adsorption Capacity

Angew Chem Int Ed Engl. 2017 Jun 26;56(27):7787-7791. doi: 10.1002/anie.201702399. Epub 2017 May 30.

Authors

Lei Zhang¹, Long Xiang², Cheng Hang¹, Wenlong Liu³, Wei Huang¹, Yichang Pan²

Affiliations

¹ State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P.R. China.
² State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P.R. China.
³ College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, P.R. China.

PMID: 28504831
DOI: 10.1002/anie.201702399

Abstract

We have adopted the concept of "cage to frameworks" to successfully produce a Na-N connected coordination networked cage Na-NC1 by using a [3+6] porous imine-linked organic cage NC1 (Nanjing Cage 1) as the precursor. It is found that Na-NC1 exhibits hierarchical porosity (inherent permanent voids and interconnected channel) and gas sorption measurements reveal a significantly enhanced CO₂ uptake (1093 cm³ g^-1 at 23 bar and 273 K) than that of NC1 (162 cm³ g^-1 under the same conditions). In addition, Na-NC1 exhibits very low CO₂ adsorption enthalpy making it a good candidate for porous materials with both high CO₂ storage and low adsorption enthalpy.

Keywords: Schiff bases; cage compounds; carbon dioxide storage; hierarchically porous materials; sodium.

Publication types

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