Structural dynamics inside a functionalized metal–organic framework probed by ultrafast 2D IR spectroscopy
Abstract
A unique aspect of metal–organic frameworks (MOFs) is their structural flexibility coexisting with a degree of regularity. Adsorbed guest molecules can cause MOF pore shapes to deform. Pore shape changes may be related to the high capacity and selectivity of the MOFs for gas adsorption and other processes. MOF flexibility and other properties are influenced by fast dynamics of the framework. Direct measurements to characterize fast motions of the MOFs have not been applied previously. We show that 2D IR spectroscopy can be performed on functionalized MOFs. We use 2D IR and other ultrafast IR methods to elucidate the timescales for ultrafast structural fluctuations and how they are influenced by a solvent filling the pores.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 15, 2014
- Source ID
- 10.1073/pnas.1422194112
Entities
People
- Amr Tamimi
- Honghan Fei
- Jun Nishida
- Michael D. Fayer
- Sascha Ott
- Seth M Cohen
- Sonja Pullen
Organizations
- Air Force Office of Scientific Research
- Knut and Alice Wallenberg Foundation
- National Science Foundation
- Stanford University
- Swedish Energy Agency
- Swedish Research Council
- United States Department of Energy
- University of California
- Uppsala University