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Updated: Nov 8, 2025
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Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
Published on: September 5, 2018
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Optimizing Fe-Based Metal-Organic Frameworks through Ligand Conformation Regulation for Efficient Dye Adsorption and
Xiurong Zhang1, Weidong Fan1, Weifeng Jiang1
1School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), NO. 66, Changjiang Road West, Qingdao, Shandong, 266580, P.R. China.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|April 22, 2021
Summary
Researchers designed new metal-organic frameworks (MOFs) by modifying organic ligands. These MOFs demonstrate enhanced adsorption for organic dyes and selective gas separation, highlighting ligand design
Area of Science:
- Materials Science
- Chemistry
- Nanotechnology
Background:
- Designing metal-organic frameworks (MOFs) with tailored structures is crucial for selective adsorption.
- Ligand modification offers a pathway to tune MOF properties for specific applications.
Purpose of the Study:
- To synthesize novel tricarboxylic ligands (H3L-Cl and H3L-NH2) based on H3TTCA.
- To construct new 3D Fe-MOFs (UPC-60-Cl and UPC-60-NH2) with unique topologies and pore structures.
- To investigate the adsorption and separation capabilities of the synthesized MOFs.
Main Methods:
- Synthesis of two tricarboxylic ligands, H3L-Cl and H3L-NH2, by modifying H3TTCA with C=C bonds and functional groups.
- Construction of two 3D iron-based metal-organic frameworks (Fe-MOFs), UPC-60-Cl and UPC-60-NH2.
- Characterization of MOF structures, including channel systems and surface windows.
- Evaluation of adsorption capacities for organic dyes (CV, RHB, MO) and selective gas separation (C2H2/CO2).
Main Results:
- UPC-60-Cl exhibits irregular 2D channels, while UPC-60-NH2 features surface cages with two types of windows.
- Both MOFs demonstrate high adsorption capacities for organic dyes: UPC-60-Cl for CV (147.2 mg g⁻¹), RHB (100.3 mg g⁻¹), and MO (220.9 mg g⁻¹).
- UPC-60-NH2 shows selective adsorption for MO (158.7 mg g⁻¹).
- UPC-60-Cl and UPC-60-NH2 achieve selective separation of equimolar C2H2/CO2 based on their pore structures and active sites.
Conclusions:
- Reasonable regulation of organic ligands is vital for diversifying MOF structures and enhancing their performance.
- The synthesized Fe-MOFs show significant potential for applications in organic dye adsorption and selective gas separation.
- Ligand design, incorporating features like C=C bonds and functional groups, effectively controls MOF topology and functionality.
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