TY - JOUR
T1 - Pore breathing of metal-organic frameworks by environmental transmission electron microscopy
AU - Parent, L.R.
AU - Pham, C.H.
AU - Patterson, J.P.
AU - Denny, M.S.
AU - Cohen, S.M.
AU - Gianneschi, N.C.
AU - Paesani, F.
PY - 2017/10/11
Y1 - 2017/10/11
N2 - Metal-organic frameworks (MOFs) have emerged as a versatile platform for the rational design of multifunctional materials, combining large specific surface areas with flexible, periodic frameworks that can undergo reversible structural transitions, or "breathing", upon temperature and pressure changes, and through gas adsorption/desorption processes. Although MOF breathing can be inferred from the analysis of adsorption isotherms, direct observation of the structural transitions has been lacking, and the underlying processes of framework reorganization in individual MOF nanocrystals is largely unknown. In this study, we describe the characterization and elucidation of these processes through the combination of in situ environmental transmission electron microscopy (ETEM) and computer simulations. This combined approach enables the direct monitoring of the breathing behavior of individual MIL-53(Cr) nanocrystals upon reversible water adsorption and temperature changes. The ability to characterize structural changes in single nanocrystals and extract lattice level information through in silico correlation provides fundamental insights into the relationship between pore size/shape and host-guest interactions.
AB - Metal-organic frameworks (MOFs) have emerged as a versatile platform for the rational design of multifunctional materials, combining large specific surface areas with flexible, periodic frameworks that can undergo reversible structural transitions, or "breathing", upon temperature and pressure changes, and through gas adsorption/desorption processes. Although MOF breathing can be inferred from the analysis of adsorption isotherms, direct observation of the structural transitions has been lacking, and the underlying processes of framework reorganization in individual MOF nanocrystals is largely unknown. In this study, we describe the characterization and elucidation of these processes through the combination of in situ environmental transmission electron microscopy (ETEM) and computer simulations. This combined approach enables the direct monitoring of the breathing behavior of individual MIL-53(Cr) nanocrystals upon reversible water adsorption and temperature changes. The ability to characterize structural changes in single nanocrystals and extract lattice level information through in silico correlation provides fundamental insights into the relationship between pore size/shape and host-guest interactions.
UR - http://www.scopus.com/inward/record.url?scp=85031100674&partnerID=8YFLogxK
U2 - 10.1021/jacs.7b06585
DO - 10.1021/jacs.7b06585
M3 - Article
C2 - 28942647
AN - SCOPUS:85031100674
SN - 0002-7863
VL - 139
SP - 13973
EP - 13976
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 40
ER -