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Title: The “anomalous” dynamics of decahyroisoquinoline revisited

Decahydroisoquinoline (DHIQ) appears to be a unique material—the only non-associated, simple liquid with dynamics deviating from density scaling. To examine whether this anomaly is real, the density, ρ, of DHIQ was measured at temperatures, T, as low as 214 K and pressures up to ∼1.2 GPa. This enabled the equation of state (EoS) to be determined, without extrapolation, over the range of thermodynamic conditions for which the relaxation times had been reported. Using this less ambiguous EoS, we find that within the precision of the available relaxation times, the latter are a function of T/ρ{sup 3.9}, contrary to previous reports. Thus, the behavior of DHIQ is unexceptional; similar to every non-associated liquid tested to date, its dynamics comply with density scaling.
Authors:
;  [1]
  1. Chemistry Division, Naval Research Laboratory, Washington, DC 20375-5320 (United States)
Publication Date:
OSTI Identifier:
22493647
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 144; Journal Issue: 2; Other Information: (c) 2016 U.S. Government; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ACCURACY; DENSITY; EQUATIONS OF STATE; EXTRAPOLATION; HYDROCARBONS; LIQUIDS; PRESSURE DEPENDENCE; QUINOLINES; TEMPERATURE DEPENDENCE; THERMODYNAMICS