scholarly journals Experimental and theoretical studies on the formation of pure β-phase polymorphs during fabrication of polyvinylidene fluoride membranes by cyclic carbonate solvents

2021 ◽  
Vol 23 (5) ◽  
pp. 2130-2147
Author(s):  
Norafiqah Ismail ◽  
Mohamed Essalhi ◽  
Mahmoud Rahmati ◽  
Zhaoliang Cui ◽  
Mohamed Khayet ◽  
...  
Keyword(s):  
Propylene Carbonate ◽  
Polyvinylidene Fluoride ◽  
Ethylene Carbonate ◽  
Cyclic Carbonate ◽  
Theoretical Studies ◽  
Β Phase ◽  
Experimental And Theoretical Studies

The preparation of β-phase PVDF membranes using three green, inexpensive, and biodegradable cyclic carbonate solvents: ethylene carbonate, propylene carbonate, and butylene carbonate.

Spectroscopic and Transport Properties of Lithium Salts in Ethylene Carbonate Based Mixed Solvents for Lithium Batteries

1998 ◽  
Vol 548 ◽  
Author(s):  
M. Nazri ◽  
G. A. Nazri ◽  
R. Aroca
Keyword(s):  
Lithium Batteries ◽  
Dimethyl Carbonate ◽  
Ethylene Carbonate ◽  
Mixed Solvents ◽  
Lithium Perchlorate ◽  
Electrolyte Solutions ◽  
Lithium Salts ◽  
Theoretical Studies ◽  
Temperature Dependence Of Conductivity ◽  
Experimental And Theoretical Studies

ABSTRACTElectrolyte solutions formed by the addition of lithium hexafluorophosphate (LiPF6) and lithium perchlorate (LiC104) to solvents obtained by mixing ethylene carbonate (EC) with propylene carbonate (PC) and dimethyl carbonate (DMC) were studied. The temperature dependence of conductivity, infrared and Raman spectra of the EC-DMC and PC-EC-DMC solvent electrolytes are discussed. The experimental and theoretical studies of characteristic vibrations of DMC are reported.

The Stabilizing Effect of Pre-Equilibria: A Trifluoromethyl Complex as CF2 Reservoir in Catalytic Olefin Difluorocarbenation

2020 ◽  
Author(s):  
Thomas Louis-Goff ◽  
Huu Vinh Trinh ◽  
Eileen Chen ◽  
Arnold L. Rheingold ◽  
Christian Ehm ◽  
...  
Keyword(s):  
High Selectivity ◽  
Side Reactions ◽  
Theoretical Studies ◽  
Attractive Feature ◽  
Catalyst Recovery ◽  
Wide Range ◽  
Stabilizing Effect ◽  
Experimental And Theoretical Studies

A new, efficient, catalytic difluorocarbenation of olefins to give 1,1-difluorocyclopropanes is presented. The catalyst, an organobismuth complex, uses TMSCF<sub>3</sub> as a stoichiometric difluorocarbene source. We demonstrate both the viability and robustness of this reaction over a wide range of alkenes and alkynes, including electron-poor alkenes, to generate the corresponding 1,1-difluorocyclopropanes and 1,1-difluorocyclopropenes. Ease of catalyst recovery from the reaction mixture is another attractive feature of this method. In depth experimental and theoretical studies showed that the key difluorocarbene-generating step proceeds through a bismuth non-redox synchronous mechanism generating a highly reactive free CF<sub>2</sub> in an endergonic pre-equilibrium. It is the reversibility when generating the difluorocarbene that accounts for the high selectivity, while minimizing CF<sub>2</sub>-recombination side-reactions.

Strong coupling: resonant effects

2017 ◽  
Author(s):  
Alexey V. Kavokin ◽  
Jeremy J. Baumberg ◽  
Guillaume Malpuech ◽  
Fabrice P. Laussy
Keyword(s):  
Strong Coupling ◽  
Experimental Studies ◽  
Strong Coupling Regime ◽  
Theoretical Studies ◽  
Stimulated Scattering ◽  
Quantum Theories ◽  
Pump Probe ◽  
Exciton Polaritons ◽  
Linear Optical Properties ◽  
Experimental And Theoretical Studies

This chapter presents experimental studies performed on planar semiconductor microcavities in the strong-coupling regime. The first section reviews linear experiments performed in the 1990s that evidence the linear optical properties of cavity exciton-polaritons. The chapter is then focused on experimental and theoretical studies of resonantly excited microcavity emission. We mainly describe experimental configuations in which stimulated scattering was observed due to formation of a dynamical condensate of polaritons. Pump-probe and cw experiments are described in addition. Dressing of the polariton dispersion and bistability of the polariton system due to inter-condensate interactions are discussed. The semiclassical and the quantum theories of these effects are presented and their results analysed. The potential for realization of devices is also discussed.

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