From Discrete Molecular Cages to a Network of Cages Exhibiting Enhanced CO2 Adsorption Capacity. Issue 27 (30th May 2017)

• Record Type: Journal Article
• Authors: Zhang, Lei; Xiang, Long; Hang, Cheng; Liu, Wenlong; Huang, Wei; Pan, Yichang
• Is Part Of: Angewandte Chemie international edition. Volume 56:Issue 27(2017)
• Page Start: 7787
• Page End: 7791
• Publication Date: 2017-05-30
• Subjects: cage compounds -- carbon dioxide storage -- hierarchically porous materials -- sodium -- Schiff bases; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201702399
• Languages: English
• ISSNs: 1433-7851

Abstract

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 cm 3 g −1 at 23 bar and 273 K) than that of NC1 (162 cm 3 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. Abstract : Networking : Hierarchically porous structures are prepared by linking discrete shape‐persistent porous organic cages with sodium ions. The resulting cage network has an excellent CO2 storage capacity along with low adsorption enthalpy compared to the discrete cage precursor.