Results 11 to 20 of about 5,681,212 (125)

Titanium-Catalyzed Defluorination of Poly(Vinyl Fluoride) and Poly(Vinylidene Fluoride) Under Friedel-Crafts Conditions. [PDF]

Angew Chem Int Ed Engl
Cationic titanium sandwich catalysts display exceptional activity in the hydrodefluorination of Csp3─F bonds, in the presence of silanes and aromatic solvents (turnover numbers up to 3000). As a result, they can be used to defluorinate challenging fluoropolymers, such as poly(vinyl fluoride) (PVF) or poly(vinylidene fluoride) (PVDF).
Le Moigne L, Sircoglou M, Bonnin Q, Penouilh MJ, Vignolle J, Grau E, Le Coz C, Bousquet M, Fleurat-Lessard P, Normand AT.   +9 more
europepmc   +3 more sources

Germylium Catalyzed Dehydrofluorination Reactions of Fluorinated Alkanes. [PDF]

Chemistry
Dehydrofluorination reactions of fluorinated alkanes catalyzed by germylium ions are reported. Computational studies of the mechanism revealed an E2 type mechanism involving a germane as a base to facilitate olefin formation in competition with an SN2 mechanism for hydrodefluorination.
Borel J, Lehmann M, Kaupp M, Braun T.
europepmc   +2 more sources

Mechanochemical Upcycling of Polyvinylidene Fluoride: Lewis Acid Induced Generation of Sodium Aluminium Fluorides. [PDF]

ChemSusChem
A solvent‐free mechanochemical process to upcycle PVDF waste into sodium aluminium fluorides, which are essential for aluminium production, was developed. By ball milling PVDF with AlCl3 and NaCl, the polymer degrades into chiolite and graphitic materials. Subsequent calcination then yields cryolite.
Bui M, Bölle J, Radnik J, Weidner S, Sander L, Ahrens M, Scheurell K, Balasubramanian K, Emmerling F, Braun T.   +9 more
europepmc   +2 more sources

Triple dehydrofluorination as a route to amidine-functionalized, aromatic phosphorus heterocycles [PDF]

, 2022
Hitherto unknown amidine-functionalized phosphabenzenes selectively form by a cascade of dehydrofluorination ...
Frost, Daniel S., Groth, Lucie J., Müller, Christian, Neale, Samuel E., Coles, Nathan T., Rigo, Massimo, Dettling, Lea   +6 more
core   +1 more source

An Amorphous Teflate Doped Aluminium Chlorofluoride: A Solid Lewis Superacid for the Dehydrofluorination of Fluoroalkanes [PDF]

, 2022
An anion doped aluminium chlorofluoride AlCl0.1F2.8(OTeF5)0.1 (ACF-teflate) was synthesized. The material contains pentafluoroorthotellurate (teflate) groups, which mimic fluoride ions electronically, but are sterically more demanding.
Thomas, Braun, Gudrun, Scholz, Kurt, Hoffmann, Franziska, Emmerling, Kerstin, Scheurell, Minh, Bui, Christian, Heinekamp, Tomasz, Stawski, Sebastian, Riedel, Kurt Hoffmann, Sebastian Riedel, Minh Bui, Christian Heinekamp, Thomas Braun, Franziska Emmerling, Gudrun Scholz, Tomasz Stawski, Kerstin Scheurell   +17 more
core   +2 more sources

Thermal dehydrofluorination of GaPO-34 revealed by NMR crystallography [PDF]

, 2021
Using a combination of solid-state NMR spectroscopy, powder X-ray diffraction (pXRD), thermogravimetry, and periodic density functional theory (DFT) calculations, we investigate the calcination of the chabazite-type gallophosphate, GaPO-34, prepared with
Amri, Mahrez, Ashbrook, Sharon E., Dawson, Daniel M., Walton, Richard I., Macfarlane, Laurie E., Dawson, Daniel M.; id_orcid, Ashbrook, Sharon E.; id_orcid   +6 more
core   +1 more source

Catalytic Dehydrofluorination of Hydrofluoroalkanes to Fluorinated Olifein Over Ni/AlF

, 2018
The hydrofluoric acid-resisting aluminum compounds (AlF3, AlPO4, AlN) supported with Ni catalyst were prepared by the wetness impregnation and tested for dehydrofluorination of hydrofluoroalkane to synthesize fluoroolefins.
Zhirong Zhu, Wenzhi Jia, Xiangyi Deng, Xinhua Liu, Xiaohua Zuo, Xia Cai, Yong Zhang, Juanjuan Yuan   +7 more
core   +2 more sources

Recent Advance for PVDF Based Flexible Piezoelectric Sensors

EcoEnergy, EarlyView.
This review focus on the structural regulation of PVDF via boundary confinement, blending regulation, electric‐field‐assisted orientation, and chemical modification for flexible piezoelectric sensors. ABSTRACT The rapid advancement of flexible electronics, wearable devices, and biomedical engineering has spurred increasing demand for sensor materials ...
Chaoran Tan, Aokai Yang, Yuyang Ling, Meilin Liu, Liang Huang   +4 more
wiley   +1 more source

Next‐Generation Carbon‐Based Anodes for Alkali Metal‐Ion Batteries: Recent Progress on Biphenylene and Emerging Materials

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Recent advances in carbon‐based anodes for alkali metal‐ion batteries are critically reviewed, with emphasis on biphenylene and other emerging carbon allotropes. Biphenylene exhibits exceptional theoretical electrochemical properties beyond conventional graphite, highlighting its strong potential as a next‐generation anode material once scalable ...
Adewale Hammed Pasanaje, Nirpendra Singh
wiley   +1 more source

Molecular‐Grafting‐Induced Anion Immobilization in Polymer Electrolytes for High‐Transference‐Number and Dendrite‐Free Solid‐State Lithium Batteries

Electron, EarlyView.
By grafting lithium phenylsulfonate onto a PVDF backbone, we create a solid electrolyte that immobilizes anions and enhances Li+ transport. This results in a high Li+ transference number (0.67) and uniform ion flux, enabling stable, dendrite‐free cycling in lithium metal batteries.
Weiqiang Lv, Zongqing Tian, Zhao Wan, Jiaqi Wang, Xiaodong Fang, Rui Liu, Yuhang Dou, Taoda Liu, Tian Ouyang, Boateng Bismark, Ning Chen, Yinghua Niu   +11 more
wiley   +1 more source