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Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
Systematic functionalization of a metal-organic framework via a postsynthetic modification approach
Kristine K Tanabe1, Zhenqiang Wang, Seth M Cohen
1Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0358, USA.
Journal of the American Chemical Society
|June 11, 2008
Summary
Postsynthetic modification of isoreticular metal-organic framework-3 (IRMOF-3) with alkyl anhydrides preserved crystallinity and porosity. Longer alkyl chains reduced conversion, impacting surface area proportionally.
Area of Science:
- Materials Science
- Chemistry
- Nanotechnology
Background:
- Isoreticular metal-organic framework-3 (IRMOF-3) possesses pendant amino groups amenable to postsynthetic modification.
- Tuning the properties of MOFs is crucial for targeted applications.
Purpose of the Study:
- To investigate the postsynthetic modification of IRMOF-3 with linear alkyl anhydrides.
- To evaluate the impact of modification on conversion, stability, and porosity.
Main Methods:
- Modification of IRMOF-3 with 10 different linear alkyl anhydrides.
- Characterization using 1H NMR, PXRD, single-crystal X-ray diffraction, ESI-MS, and N2 sorption (BET).
Main Results:
- Conversion decreased with increasing alkyl chain length, ranging from ~99% to ~7%.
- Modified IRMOF-3 materials exhibited thermal stability up to ~430°C and retained crystallinity.
- All modified MOFs maintained microporosity, with surface area correlating to substituent size and number.
Conclusions:
- Postsynthetic modification of IRMOF-3 is feasible and preserves framework integrity.
- The extent of modification and resulting porosity can be controlled by alkyl chain length.
