Ordered Oxygen Arrangements in Y1Ba2Cu3O7−x

1989 ◽  
Vol 156 ◽  
Author(s):  
R. Beyers ◽  
B.T. Ahn ◽  
G. Gorman ◽  
V.Y. Lee ◽  
S.S.P. Parkin ◽  
...  
Keyword(s):  
Phase Separation ◽  
Solid State ◽  
Electrical Properties ◽  
Wave Vector ◽  
Solid State Ionic ◽  
Ordered Structures ◽  
State Ionic

ABSTRACTWe describe the ordered oxygen arrangements in Y1Ba2Cu3O7−x samples prepared in precisely controlled oxygen environments using a solid-state ionic tehnique. The so-called “Ortho II”phase, characterized by a 〈1/200〉 superlattice wave vector, exists at oxygen contents from 6.28 to 6.65, with electrical properties that range from insulating to superconducting at up to 60 K. Additional ordered structures occur at oxygen contents from 6.65 to 6.90. All of the ordered structures are consistent with the removal of entire chains of oxygen along the b axis, which minimizes the number of three-fold coordinated copper and creates Cu+1 ions even in oxygen-rich samples. We found no evidence for phase separation between 6.0 and 7.0 or between 6.5 and 7.0. Phase separation, if it occurs at all, occurs on the 60 K and 90 K plateaus.

Preparation and electrochemical properties of Li0.33Sr La0.56–2/3TiO3-based solid-state ionic supercapacitor

2019 ◽  
Vol 45 (2) ◽  
pp. 2584-2590 ◽  
Author(s):  
Dong-liang Lu ◽  
Jiu-ming Ma ◽  
Jia-lin Wu ◽  
Ying-bang Yao ◽  
Tao Tao ◽  
...  
Keyword(s):  
Solid State ◽  
Electrochemical Properties ◽  
Solid State Ionic ◽  
State Ionic

Flexible and non-volatile redox active quasi-solid state ionic liquid based electrolytes for thermal energy harvesting

2018 ◽  
Vol 2 (8) ◽  
pp. 1806-1812 ◽  
Author(s):  
Abuzar Taheri ◽  
Douglas R. MacFarlane ◽  
Cristina Pozo-Gonzalo ◽  
Jennifer M. Pringle
Keyword(s):  
Ionic Liquid ◽  
Solid State ◽  
Energy Harvesting ◽  
Thermal Energy ◽  
Solid State Ionic ◽  
Waste Heat ◽  
Low Grade ◽  
Redox Active ◽  
Thermal Energy Harvesting ◽  
State Ionic

Towards the development of stable thermocells for harvesting low-grade waste heat, non-volatile and flexible electrolyte films are reported.

Conversion of covalent to ionic character of V2O5–CeO2–PbO–B2O3 glasses for solid state ionic devices

2012 ◽  
Vol 407 (21) ◽  
pp. 4269-4273 ◽  
Author(s):  
Gurinder Pal Singh ◽  
Parvinder Kaur ◽  
Simranpreet Kaur ◽  
D.P. Singh
Keyword(s):  
Solid State ◽  
Solid State Ionic ◽  
Ionic Character ◽  
Ionic Devices ◽  
State Ionic

Photochemistry of 9-methylbicyclo[3.3.1]nonyl aryl ketones — A novel 1,5-disproportionation of 1,4-hydroxy biradicals and asymmetric induction using the solid-state ionic chiral auxiliary method

2005 ◽  
Vol 83 (9) ◽  
pp. 1460-1472 ◽  
Author(s):  
Shuang Chen ◽  
Brian O Patrick ◽  
John R Scheffer
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Solid State Ionic ◽  
Chiral Auxiliary ◽  
Asymmetric Induction ◽  
X Ray Crystallography ◽  
Aryl Ketones ◽  
Hydroxy Biradicals ◽  
Phenyl Ketones ◽  
State Ionic

A novel 1,5-disproportionation reaction has been discovered for 1,4-hydroxy biradicals derived from the photolysis of 9-methylbicyclo[3.3.1]nonyl phenyl ketones (1), which undergo mainly Yang cyclization both in solution and the solid state. By applying the solid-state ionic chiral auxiliary method of asymmetric synthesis to the Yang cyclization, enantiomeric excesses as high as 95% were achieved at high reaction conversions. The origin of the reaction selectivity is discussed with the help of X-ray crystallography. In addition, the solid-state photoreaction of ketone 1b was found to occur in a single crystal-to-single crystal fashion.Key words: photochemistry, 1,4-hydroxy biradical, disproportionation, asymmetric induction, ionic chiral auxiliary, single crystal-to-single crystal reaction.

Sign in / Sign up

Export Citation Format

Share Document