Home >
News > Ultrastable Copper Carboxylate Metal−Organic Frameworks
Ultrastable Copper Carboxylate Metal−Organic Frameworks
Summary:
The authors from Nanjing Normal University and Nanjing University developed a Cu2TBAPy material with ultra-high water stability, achieving excellent separation results for xylene isomers in the field of gas chromatography.
Background:
1. To address the problem of poor water stability of copper carboxylate metal−organic frameworks (MOFs), previous researchers conducted work on modifying coordination bonds and bulk particle structures, achieving some success. However, these methods often increased the complexity of synthesis and inadvertently blocked open pores, reducing application performance.
2. The authors in this study proposed a nanoenvelope strategy by utilizing the water resistance of pyrene ligands as a protective nanoenvelope, constructing a robust 2D copper carboxylate MOF, named Cu2TBAPy, and obtained results of exceptional water stability and separation performance.
Research Content:
1. Synthesis:
The authors synthesized Cu2TBAPy using the solvothermal method in DMF and EtOH mixtures.
2. Characterizations:
1) BET results show a surface area of 519 m² g⁻¹ and a pore size of 0.86 nm;
2) SEM/TEM tests show the particle size of the material is about 50 nm in thickness and 3-4 μm in lateral dimensions.
3) Other tests include PXRD, TGA, and RDF analyses.
3. Application:
The material was tested in gas chromatography for separating xylene isomers, achieving a resolution of 18.2 (meta-xylene/para-xylene) and a durability of 31 months.
4. Mechanism:
The analysis of the experimental results indicates that the AB stacking arrangement of Cu2TBAPy forms a protective nanoenvelope, hindering the accessibility of water to the Cu−O coordination bond. The DFT calculations and RDF analyses further prove the weak affinity between water and Cu2TBAPy.
Outlook:
This research achieves significant progress in developing highly water-stable copper carboxylate MOFs, providing valuable insights for the design and synthesis of MOFs with excellent stability and performance for practical applications.
Ultrastable Copper Carboxylate Metal−Organic Frameworks
Authors: Han Yang, Ming Xu, Min Mao, Lei Gao, Hao Zhang, Sha-Sha Meng, Wen-Qi Tang, Yu-Hao Gu, Shuai Yuan, Ling-Mei Liu, Zhi-Yuan Gu
DOI：10.1021/jacs.5c05507
Link：https://pubs.acs.org/doi/10.1021/jacs.5c05507
The above review is for academic progress sharing. For any errors or copyright issues, please contact us for correction or removal.
