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Tuning the release rate of volatile molecules by pore surface engineering in metal-organic frameworks
- Source :
- Chinese Chemical Letters. 32:1988-1992
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Encapsulation and controlled release of volatile molecules such as fragrances in a designed manner is important but challenging for the flavor and fragrance industry. Here, we report the tuning release of volatile molecules by postsynthetic modification of an amine-terminated metal-organic framework (MOF) MIL-101-NH2. By amidation, we obtained three MIL-101 MOFs, the trimethylacetamide-terminated TC-MIL-101, the benzamide-terminated BC-MIL-101, and the oxalic acid monoamide-terminated OC-MIL-101. All the MOFs can efficiently encapsulate volatile molecules. Moreover, we demonstrate that the release profile of volatiles can be widely tuned to sustain the release in several days to months and even over a year using different modified MIL-101 MOFs. We show that the release profiles are correlated with the binding energies between the guest volatiles and pores in MOFs. The pore diffusion and the synergistic transport are the rate-limiting step of the guest molecules from the modified MOFs.
- Subjects :
- Chemistry
fungi
Oxalic acid
Binding energy
02 engineering and technology
General Chemistry
Surface engineering
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Controlled release
0104 chemical sciences
chemistry.chemical_compound
Chemical engineering
Molecule
Metal-organic framework
0210 nano-technology
Subjects
Details
- ISSN :
- 10018417
- Volume :
- 32
- Database :
- OpenAIRE
- Journal :
- Chinese Chemical Letters
- Accession number :
- edsair.doi...........a0d29053a3b3941fc572d7d9dc093dc3