The Experts below are selected from a list of 285 Experts worldwide ranked by ideXlab platform
Christoph Schick - One of the best experts on this subject based on the ideXlab platform.
-
Highly stable glasses of cis-Decalin and cis/trans-Decalin mixtures.
The journal of physical chemistry. B, 2013Co-Authors: Katherine R. Whitaker, Daniel J. Scifo, Mark Ediger, Mathias Ahrenberg, Christoph SchickAbstract:In situ AC nanocalorimetry was used to measure the reversing heat capacity of vapor-deposited glasses of decahydronaphthalene (Decalin). Glasses with low heat capacity and high kinetic stability, as compared to the corresponding liquid-cooled glass, were prepared from cis-Decalin and from several cis/trans-Decalin mixtures. This is the first report of highly stable glass formation for molecular mixtures. The 50/50 cis/trans-Decalin mixture is the highest fragility material reported to produce an ultrastable glass. The 50/50 mixture exhibited high kinetic stability, with a ∼500 nm film deposited at 116 K (0.86 Tg) displaying a transformation time equivalent to 104.4 times the structural relaxation time of the supercooled liquid at the annealing temperature. cis-Decalin and the Decalin mixture formed stable glasses that had heat capacities as much as 4.5% lower than the liquid-cooled glass.
-
highly stable glasses of cis Decalin and cis trans Decalin mixtures
Journal of Physical Chemistry B, 2013Co-Authors: Katherine R. Whitaker, Daniel J. Scifo, Mathias Ahrenberg, M D Ediger, Christoph SchickAbstract:In situ AC nanocalorimetry was used to measure the reversing heat capacity of vapor-deposited glasses of decahydronaphthalene (Decalin). Glasses with low heat capacity and high kinetic stability, as compared to the corresponding liquid-cooled glass, were prepared from cis-Decalin and from several cis/trans-Decalin mixtures. This is the first report of highly stable glass formation for molecular mixtures. The 50/50 cis/trans-Decalin mixture is the highest fragility material reported to produce an ultrastable glass. The 50/50 mixture exhibited high kinetic stability, with a ∼500 nm film deposited at 116 K (0.86 Tg) displaying a transformation time equivalent to 104.4 times the structural relaxation time of the supercooled liquid at the annealing temperature. cis-Decalin and the Decalin mixture formed stable glasses that had heat capacities as much as 4.5% lower than the liquid-cooled glass.
Masakatsu Shibasaki - One of the best experts on this subject based on the ideXlab platform.
-
Synthesis of cis‐Decalin Derivative via π‐Allylpalladium Intermediate and Its Transformation to Usefully Functionalized trans‐ Decalin Derivative.
ChemInform, 2010Co-Authors: Toshiyasu Takemoto, Yuji Nishikimi, Mikiko Sodeoka, Masakatsu ShibasakiAbstract:Abstract treatment of 15 or 16 with Pd(PPh3)4 (10 mol %) and NaH (1.2 equiv) afforded the cis-Decalin derivative 18 stereoselectivity in high yield, which was effectively transformed into the usefully functionalized trans-Decalin derivative 29.
-
Synthesis of cis-Decalin derivative via π-allylpalladium intermediate and its transformation to usefully functionalized trans-Decalin derivative
Tetrahedron Letters, 1992Co-Authors: Toshiyasu Takemoto, Yuji Nishikimi, Mikiko Sodeoka, Masakatsu ShibasakiAbstract:Abstract treatment of 15 or 16 with Pd(PPh3)4 (10 mol %) and NaH (1.2 equiv) afforded the cis-Decalin derivative 18 stereoselectivity in high yield, which was effectively transformed into the usefully functionalized trans-Decalin derivative 29.
Katherine R. Whitaker - One of the best experts on this subject based on the ideXlab platform.
-
Highly stable glasses of cis-Decalin and cis/trans-Decalin mixtures.
The journal of physical chemistry. B, 2013Co-Authors: Katherine R. Whitaker, Daniel J. Scifo, Mark Ediger, Mathias Ahrenberg, Christoph SchickAbstract:In situ AC nanocalorimetry was used to measure the reversing heat capacity of vapor-deposited glasses of decahydronaphthalene (Decalin). Glasses with low heat capacity and high kinetic stability, as compared to the corresponding liquid-cooled glass, were prepared from cis-Decalin and from several cis/trans-Decalin mixtures. This is the first report of highly stable glass formation for molecular mixtures. The 50/50 cis/trans-Decalin mixture is the highest fragility material reported to produce an ultrastable glass. The 50/50 mixture exhibited high kinetic stability, with a ∼500 nm film deposited at 116 K (0.86 Tg) displaying a transformation time equivalent to 104.4 times the structural relaxation time of the supercooled liquid at the annealing temperature. cis-Decalin and the Decalin mixture formed stable glasses that had heat capacities as much as 4.5% lower than the liquid-cooled glass.
-
highly stable glasses of cis Decalin and cis trans Decalin mixtures
Journal of Physical Chemistry B, 2013Co-Authors: Katherine R. Whitaker, Daniel J. Scifo, Mathias Ahrenberg, M D Ediger, Christoph SchickAbstract:In situ AC nanocalorimetry was used to measure the reversing heat capacity of vapor-deposited glasses of decahydronaphthalene (Decalin). Glasses with low heat capacity and high kinetic stability, as compared to the corresponding liquid-cooled glass, were prepared from cis-Decalin and from several cis/trans-Decalin mixtures. This is the first report of highly stable glass formation for molecular mixtures. The 50/50 cis/trans-Decalin mixture is the highest fragility material reported to produce an ultrastable glass. The 50/50 mixture exhibited high kinetic stability, with a ∼500 nm film deposited at 116 K (0.86 Tg) displaying a transformation time equivalent to 104.4 times the structural relaxation time of the supercooled liquid at the annealing temperature. cis-Decalin and the Decalin mixture formed stable glasses that had heat capacities as much as 4.5% lower than the liquid-cooled glass.
Toshiyasu Takemoto - One of the best experts on this subject based on the ideXlab platform.
-
Synthesis of cis‐Decalin Derivative via π‐Allylpalladium Intermediate and Its Transformation to Usefully Functionalized trans‐ Decalin Derivative.
ChemInform, 2010Co-Authors: Toshiyasu Takemoto, Yuji Nishikimi, Mikiko Sodeoka, Masakatsu ShibasakiAbstract:Abstract treatment of 15 or 16 with Pd(PPh3)4 (10 mol %) and NaH (1.2 equiv) afforded the cis-Decalin derivative 18 stereoselectivity in high yield, which was effectively transformed into the usefully functionalized trans-Decalin derivative 29.
-
Synthesis of cis-Decalin derivative via π-allylpalladium intermediate and its transformation to usefully functionalized trans-Decalin derivative
Tetrahedron Letters, 1992Co-Authors: Toshiyasu Takemoto, Yuji Nishikimi, Mikiko Sodeoka, Masakatsu ShibasakiAbstract:Abstract treatment of 15 or 16 with Pd(PPh3)4 (10 mol %) and NaH (1.2 equiv) afforded the cis-Decalin derivative 18 stereoselectivity in high yield, which was effectively transformed into the usefully functionalized trans-Decalin derivative 29.
Susumu Kobayashi - One of the best experts on this subject based on the ideXlab platform.
-
Synthetic study of akaterpin: Determination of the relative stereochemistry of the upper Decalin moiety with disulfated hydroquinone
Tetrahedron Letters, 1999Co-Authors: Nobuyuki Kawai, Ken Ichi Takao, Susumu KobayashiAbstract:Abstract In order to establish the stereochemistry of akaterpin, a specific inhibitor of PI-PLC, synthesis of cis-Decalin 2 and trans-Decalin 3 was carried out. Comparison of NMR spectra of 2 and 3 with that of akaterpin indicated that the upper Decalin has a cis-fused structure.
