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Time-scale ordering in hydrogen- and van der Waals-bonded liquids by Lisa Anita Roed; Jeppe C. Dyre; Kristine Niss; Tina Hecksher; Birte Riechers is a Physics and Astronomy article available to read on EtoBox.

What is Time-scale ordering in hydrogen- and van der Waals-bonded liquids about?

The time scales of structural relaxation are investigated on the basis of five different response functions for 1,2, 6-hexanetriol, a hydrogen-bonded liquid with a minor secondary contribution, and 2,6,10,15,19,23-hexamethyl-tetracosane (squalane), a van der Waals-bonded liquid with a prominent secondary relaxation process. Time scales of structural relaxation are derived as inverse peak frequencies for each investigated response function. For 1,2,6-hexanetriol, the ratios of the time scales are temperature-independent, while a decoupling of time scales is observed for squalane in accordance with the literature. An alternative evaluation approach is made on the squalane data, extracting time scales from the terminal relaxation mode instead of the peak position, and in this case, temperature-independent time-scale ratios are also found for squalane, despite its strong secondary relaxation contribution. Interestingly, the very same ordering of response-function-specific time scales is observed for these two liquids, which is also consistent with the observation made for simple van der Waals-bonded liquids reported previously [Jakobsen et al., J. Chem. Phys. 136, 081102 (2012)]. This

Who reads Time-scale ordering in hydrogen- and van der Waals-bonded liquids?

Author

Lisa Anita Roed; Jeppe C. Dyre; Kristine Niss; Tina Hecksher; Birte Riechers

Publisher

AIP Publishing

Published

2021

Language

EN

Field

Physics and Astronomy (Physical Sciences)