Results 11 to 20 of about 648 (164)

Catalytic Dehydrofluorination of Hydrofluoroalkanes to Fluorinated Olifein Over Ni/AlF3 Catalysts

MATEC Web of Conferences, 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.
Jia Wenzhi, Cai Xia, Zhang Yong, Zuo Xiaohua, Yuan Juanjuan, Liu Xinhua, Zhu Zhirong, Deng Xiangyi   +7 more
doaj   +3 more sources

Thermal Dehydrofluorination of GaPO-34 Revealed by NMR Crystallography [PDF]

The Journal of Physical Chemistry C, 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 either 1-methylimidazole (mim) or pyridine (py) as the structure-directing agent (SDA) and fluoride
Daniel M. Dawson, Laurie E. Macfarlane, Mahrez Amri, Richard I. Walton, Sharon E. Ashbrook   +4 more
openaire   +6 more sources

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

Chemical Communications, 2022
Hitherto unknown amidine-functionalized phosphabenzenes selectively form by a cascade of dehydrofluorination reactions.
Nathan T. Coles, Lucie J. Groth, Lea Dettling, Daniel S. Frost, Massimo Rigo, Samuel E. Neale, Christian Müller   +6 more
openaire   +3 more sources

Effect of Carbonate Source on the Dehydrofluorination Process in Polyvinylidene Fluoride/Alkali Metal Carbonate Composites. [PDF]

ACS Omega, 2023
In this paper, Raman and X-ray photoelectron spectroscopies were applied to analyze compositional and structural variations of the generated activated carbon (AC), as induced by changing carbonate source in three different types of systems, PVDF/M2CO3 (M
Zhu W, Okada K, Hoshida N, Yoshida Y, Martucci A, Zhu J, Marin E, Pezzotti G.   +7 more
europepmc   +3 more sources

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

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

, 2023
Ananion-dopedaluminiumchlorofluoride AlCl0.1F2.8(OTeF5)0.1(ACF-teflate) was synthesized.The material contains pentafluor-oorthotellurate(teflate)groups, which mimic fluoride ions electronically, but are sterically more demanding.
Emmerling, Franziska, Stawski, T.M., Sebastian Riedel, Braun, T., Minh Bui, Christian Heinekamp, Hoffmann, K. F., Scholz, G., Emmerling, F., Hoffmann, K.F., Thomas Braun, Riedel, S., Heinekamp, Christian, Kurt F. Hoffmann, Franziska Emmerling, Bui, M., Scheurell, K., Gudrun Scholz, Stawski, Tomasz, Kerstin Scheurell, Tomasz M. Stawski, Heinekamp, C.   +21 more
core   +4 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

Reactivity of Rh(I) Complexes Toward Fluorinated Ethers: Activation of Inhalation Anesthetics. [PDF]

ChemistryOpen
Reactions of the inhaled anesthetics and α‐fluorinated ethers sevoflurane, enflurane, and isoflurane with [Rh(H)(PEt3)3] led to versatile organometallic transformations including C(sp3)─F and C(sp3)─Cl bond cleavage and metal–halogen bond formation, a catalytic hydrodehalogenation reaction, as well as the generation of a unique fluorinated phosphonium ...
Mollasalehi S, Bölle J, Braun T.
europepmc   +2 more sources

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

Preparation of alkali-resistant PVDF membranes via immobilization of sodium lauryl sulfate (SDS) on surface

Applied Water Science, 2021
A novel strategy was proposed to fabricate alkali-resistant PVDF membrane via sodium lauryl sulfate (SDS) attached to the surface of membrane and immobilized by UV-curable polyester acrylate and tri(propylene glycol) diacrylate (TPGDA).
Gongpu Wen, Kun Chen, Yanhong Zhang, Yue Zhou, Jun Pan, Qian Wang, Siyuan Sun, Zhaohui Wang   +7 more
doaj   +1 more source