Record-Setting Sorbents for Reversible Water Uptake by Systematic Anion Exchanges in Metal-Organic Frameworks.

ABSTRACT: The reversible capture of water vapor at low humidity can enable transformative applications such as atmospheric water harvesting and heat transfer that uses water as a refrigerant, replacing environmentally detrimental hydro- and chloro-fluorocarbons. The driving force for these applications is governed by the relative humidity at which the pores of a porous material fill with water. Here, we demonstrate modulation of the onset of pore-filling in a family of metal-organic frameworks with record water sorption capacities by employing anion exchange. Unexpectedly, the replacement of the structural bridging Cl^- with the more hydrophilic anions F^- and OH^- does not induce pore-filling at lower relative humidity, whereas the introduction of the larger Br^-</

SUBMITTER: Rieth AJ 

PROVIDER: S-EPMC6748661 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature