Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 136, Issue 21, Pages 7579-7582Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja5030723
Keywords
-
Categories
Funding
- U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) [DE-FG02-13ER46972]
- NSF [DMR1207063]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1207063] Funding Source: National Science Foundation
Ask authors/readers for more resources
Metal-organic frameworks (MOFs) with cationic frameworks and mobile anions have many applications from sensing, anion exchange and separation, to fast ion conductivity. Despite recent progress, the vast majority of MOFs have neutral frameworks. A common mechanism for the formation of neutral frameworks is the attachment of anionic species such as F- or OH- to the framework metal sites, neutralizing an otherwise cationic scaffolding. Here, we report a general method capable of converting such neutral frameworks directly into cationic ones with concurrent generation of mobile anions. Our method is based on the differential affinity between distinct metal ions with framework anionic species. Specifically, Al3+ is used to strip F- anions away from framework Cr3+ sites, leading to cationic frameworks with mobile Cl- anions. The subsequent anion exchange with OH- further leads to a porous network with mobile OH- anions. New materials prepared by anion stripping can undergo ion exchange with anionic organic dyes and also exhibit much improved ionic conductivity compared to the original unmodified MOFs.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available