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Dynamics of glass-forming liquids. III. Comparing the dielectric α- and β-relaxation of 1-propanol and o-terphenyl
Abstract
We have measured the dielectric relaxation of the glass-former 1-propanol for temperatures between 65 and 350 K in the frequency range 10−2 to 2⋅1010 Hz and the photon correlation spectro-scopy decays near Tg. Attributing the strong Debye-type process of 1-propanol to distinct -OH group effects leaves two faster processes related to the structural relaxation which can be identified as α-relaxation and Johari–Goldstein type β-relaxation characteristic of nonhydrogen-bonding supercooled liquids. From the temperature dependent relaxation times τ(T) regarding the three distinct loss peaks, we can specify an α-β-bifurcation temperature Tβ, which coincides with characteristic qualitative changes in the τ(T) behavior, as also observed for ortho-terphenyl and other glass-forming liquids. This assignment is confirmed by the correla-tion times derived from incoherent quasielastic light-scattering data obtained from the simultaneously measured photon-correlation spectroscopy.
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Cited by
Deep eutectic solvents: A review of fundamentals and applications
Hansen, B. B., Spittle, S., Chen, B., Poe, D., Zhang, Y., Klein, J. M., Horton, A., Adhikari, L., Zelovich, T., Doherty, B. W., et al. (2021) · Chemical Reviews · doi:10.1021/acs.chemrev.0c00385 · Cited by 3,422
Classification of secondary relaxation in glass-formers based on dynamic properties
Ngai, K. L., & Paluch, M. (2004) · The Journal of Chemical Physics · doi:10.1063/1.1630295 · Cited by 831
Femtosecond Mid-IR Pump-Probe Spectroscopy of Liquid Water: Evidence for a Two-Component Structure
Woutersen, S., Emmerichs, U., & Bakker, H. J. (1997) · Science · doi:10.1126/science.278.5338.658 · Cited by 579
Dynamic and thermodynamic properties of glass-forming substances
Ngai, K. L. (2000) · Journal of Non-Crystalline Solids · doi:10.1016/s0022-3093(00)00238-6 · Cited by 425
Ngai, K. L., Lunkenheimer, P., León, C., Schneider, U., Brand, R., & Loidl, A. (2001) · The Journal of Chemical Physics · doi:10.1063/1.1381054 · Cited by 254
Metadata
- Authors
- Hansen, C., Stickel, F., Berger, T., Richert, R., & Fischer, E. W.
- Venue
- The Journal of Chemical Physics
- Publisher
- AIP Publishing
- Published
- 1997-07-22
- Volume
- 107
- Issue
- 4
- Pages
- 1086-1093
- ISSN
- 0021-9606 (ISSN-L)
- 1089-7690
- OpenAlex
- W2058534458
- Cited by
- 430
- References
- 0
- FWCI
- 17.65
- Type
- journal article
- Language
- en
- Open access
- closed
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- Hansen, C., Stickel, F., Berger, T., Richert, R., & Fischer, E. W. (1997). Dynamics of glass-forming liquids. III. Comparing the dielectric α- and β-relaxation of 1-propanol and o-terphenyl. The Journal of Chemical Physics. https://doi.org/10.1063/1.474456
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