Supercooled water confined in a metal-organic framework
arXiv:2009.07722 · doi:10.1038/s42005-020-0363-x
Abstract
Within the so-called "no-man's land" between about 150 and 235 K, crystallization of bulk water is inevitable. The glasslike freezing and a liquid-to-liquid transition of water, predicted to occur in this region, can be investigated by confining water in nanometer-sized pores. Here we report the molecular dynamics of water within the pores of a metal-organic framework using dielectric spectroscopy. The detected temperature-dependent dynamics of supercooled water matches that of bulk water as reported outside the borders of the no-man's land. In confinement, a different type of water is formed, nevertheless still undergoing a glass transition with considerable molecular cooperativity. Two different length scales seem to exist in water: A smaller one, of the order of 2 nm, being the cooperativity length scale governing glassy freezing, and a larger one (> 2 nm), characterizing the minimum size of the hydrogen-bonded network needed to create "real" water with its unique dynamic properties
arXiv commentThis is a pre-print of an article published in "Communication Physics". The final authenticated version is available online at: https://doi.org/10.1038/s42005-020-0363-x"
References in corpus (13)
- Pressure Dependence of Fragile-to-Strong Transition and a Possible Second Critical Point in Supercooled Confined Water
- The Excess Wing in the Dielectric Loss of Glass-Formers: A Johari-Goldstein beta-Relaxation?
- The Putative Liquid-Liquid Transition is a Liquid-Solid Transition in Atomistic Models of Water
- Glassy Aging Dynamics
- Fifth-order susceptibility unveils growth of thermodynamic amorphous order in glass-formers
- Electrode Polarization Effects in Broadband Dielectric Spectroscopy
- Electromagnetic-radiation absorption of water
- NMR Studies on the Temperature-Dependent Dynamics of Confined Water
- High-frequency dynamics of type-B glass formers investigated by broadband dielectric spectroscopy
- Glycerol confined in zeolitic imidazolate frameworks: The temperature-dependent cooperativity length scale of glassy freezing
- Dielectric spectroscopy in benzophenone: The beta relaxation and its relation to the mode-coupling Cole-Cole peak
- MFU-type metal-organic frameworks as host materials of confined supercooled liquids
- The length and time scales of water's glass transitions