Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Jan Philipp Gabriel"'
Publikováno v:
The Journal of Physical Chemistry B. 127:371-377
We present a dielectric and shear mechanical study of 1-propanol and three phenylpropanols. Contrary to other monoalcohols, the phenylpropanols do not show a bimodal behavior in their dielectric response, but instead show a single, rather narrow proc
Publikováno v:
Physical Chemistry Chemical Physics. 24:18272-18280
We show that intramolecular dynamics can induce significant broadening of the spectral shape of the α-process in polyalcohols (PAs). The effect is only observed in long-chained PAs, like sorbitol, and is absent in short-chained PAs, like glycerol.
Autor:
R. Horstmann, Thomas Blochowicz, Jan Philipp Gabriel, Florian Pabst, Till Böhmer, Michael Vogel
Publikováno v:
Macromolecules. 54:10340-10349
Due to their size disparity, the dynamics of solvent molecules in concentrated polymer solutions can be faster by several orders of magnitude compared to the polymer matrix. Despite these observations, past research suggests that a fraction of the so
Publikováno v:
The Journal of Physical Chemistry Letters. 12:8465-8469
We compare structural relaxation and structural recovery dynamics for molecular glass-formers, both measured by dielectric techniques in the regime of linear responses. It is emphasized that structural recovery restores ergodicity, whereas structural
Publikováno v:
Physical chemistry chemical physics : PCCP. 24(30)
Using depolarized light scattering, we have recently shown that structural relaxation in a broad range of supercooled liquids follows, to good approximation, a generic line shape with high-frequency power law
Autor:
Timo Richter, Jan Philipp Gabriel, Andreas Helbling, Thomas Walther, Thomas Blochowicz, Parvaneh Zourchang, Till Böhmer, Peter Weigl, Florian Pabst
Publikováno v:
The Journal of Physical Chemistry Letters. 12:3685-3690
One of the unsolved problems of dynamics in supercooled liquids are the differences in spectral shape of the structural relaxation observed among different methods and substances, and a possible generic line shape has long been debated. We show that
Autor:
Ranko Richert, Jan Philipp Gabriel, Mark Ediger, Anthony Guiseppi-Elie, Erik Thoms, Birte Riechers
Publikováno v:
The Journal of chemical physics. 154(2)
Depositing a simple organic molecular glass-former 2-methyltetrahydrofuran (MTHF) onto an interdigitated electrode device via physical vapor deposition gives rise to an unexpected variety of states, as revealed by dielectric spectroscopy. Different p
Autor:
Jan Philipp Gabriel, Florian Pabst, Parvaneh Zourchang, Peter Weigl, Thomas Blochowicz, Till Böhmer, Andreas Helbling
Publikováno v:
Physical chemistry chemical physics : PCCP. 22(20)
We suggest a way to disentangle self- from cross-correlation contributions in the dielectric spectra of glycerol. Recently it was demonstrated for monohydroxy alcohols that a detailed comparison of the dynamic susceptibilities of photon correlation a
Autor:
Thomas Blochowicz, Jan Philipp Gabriel, Florian Pabst, Thomas Walther, Peter Weigl, Daniel Koestel
Publikováno v:
Physical chemistry chemical physics : PCCP. 21(44)
The dielectric Debye relaxation in monohydroxy alcohols has been subject of long-standing scientific interest and is presently believed to arise from the relaxation of transiently H-bonded supramolecular structures. Therefore, its manifestation might
Publikováno v:
Journal of Molecular Liquids. 330:115626
High electric fields are applied to illuminate the role of hydrogen bonding in the dielectric relaxation of 1-phenyl-1-propanol (1P1P). Unlike many other monohydroxy alcohols, 1P1P is not associated with a strong distinct Debye loss peak, which would