126 citations · 333 across the 9 of their papers we have counts for
9 papers
Tetramethylbenzidine-TetrafluoroTCNQ: A narrow-gap semiconducting salt with room temperature relaxor ferroelectric behavior
Stefano Canossa, Elena Ferrari, Pit Sippel +8
We present an extension and revision of the spectroscopic and structural data of the mixed stack charge transfer (CT) crystal 3,3,5,5-tetramethylbenzidine--tetraf…
Supercooled water confined in a metal-organic framework
Jonas K. H. Fischer, Pit Sippel, Dmytro Denysenko +3
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, pr…
Glycerol confined in zeolitic imidazolate frameworks: The temperature-dependent cooperativity length scale of glassy freezing
M. Uhl, J. K. H. Fischer, P. Sippel +4
In the present work, we employ broadband dielectric spectroscopy to study the molecular dynamics of the prototypical glass former glycerol confined in two microporous zeolitic imid…
Importance of reorientational dynamics for the charge transport in ionic liquids
P. Sippel, S. Krohns, D. Reuter +2
Most ionic liquids contain at least one rather complex ion species exhibiting a dipolar moment. In the present work, we provide a thorough evaluation of broadband dielectric spectr…
Dielectric study on mixtures of ionic liquids
E. Thoms, P. Sippel, D. Reuter +3
Ionic liquids are promising candidates for electrolytes in energy-storage systems. We demonstrate that mixing two ionic liquids allows to precisely tune their physical properties,…
Impact of water on the charge transport of a glass-forming ionic liquid
P. Sippel, V. Dietrich, D. Reuter +4
Using dielectric spectroscopy and differential scanning calorimetry, we have performed a detailed investigation of the influence of water uptake on the translational and reorientat…
MFU-type metal-organic frameworks as host materials of confined supercooled liquids
J. K. H. Fischer, P. Sippel, D. Denysenko +3
In this work we examine the use of metal-organic framework (MOF) systems as host materials for the investigation of glassy dynamics in confined geometry. We investigate the confine…
Importance of glassy fragility for energy applications of ionic liquids
P. Sippel, P. Lunkenheimer, S. Krohns +2
Ionic liquids (ILs) are salts that are liquid close to room temperature. Their possible applications are numerous, e.g., as solvents for green chemistry in various electrochemical…
Dielectric signature of charge order in lanthanum nickelates
P. Sippel, S. Krohns, E. Thoms +7
Three charge-ordering lanthanum nickelates La2-xAxNiO4, substituted with specific amounts of A = Sr, Ca, and Ba to achieve commensurate charge order, are investigated using broadba…