Results 21 to 30 of about 648 (164)

Solution Combustion Synthesis of Cr₂O₃ Nanoparticles and the Catalytic Performance for Dehydrofluorination of 1,1,1,3,3-Pentafluoropropane to 1,3,3,3-Tetrafluoropropene

Molecules, 2019
Cr2O3 nanoparticles were prepared by solution combustion synthesis (SCS) with chromium nitrate as the precursor and glycine as the fuel. Commercial Cr2O3 and Cr2O3 prepared by a precipitation method were also included for comparison.
Haili Wang, Wenfeng Han, Xiliang Li, Bing Liu, Haodong Tang, Ying Li   +5 more
doaj   +1 more source

The contrastive study of chemical treatment on the properties of hydrophobic PVDF membrane

Journal of Applied Science & Process Engineering, 2015
In this study, polyvinylidene fluoride (PVDF) flat membranes were treated with potassium hydroxide (KOH), sodium hydroxide (NaOH) and sodium hypochlorite (NaOCl).
Mohamad Fairus Rabuni
doaj   +1 more source

A direct and rapid route to α,α-difluoroacylsilanes from trifluoroethanol

, 2005
α,α-Difluoroacylsilanes were synthesised directly from a range of allyl ethers of trifluoroethanol via dehydrofluorination/metallation procedures, followed by thermal [3,3]-sigmatropic rearrangement of the intermediate vinylmetals.
Percy, Jonathan, Hongli Yang, Erwan Kerouredan, Kerouredan, Erwan, Maxime R. Garayt, Jonathan M. Percy, Audouard, Christophe, Garayt, Maxime R, Yang, Hongli, Christophe Audouard   +9 more
core   +3 more sources

Composite Electrolyte Membranes from Partially Fluorinated Polymer and Hyperbranched, Sulfonated Polysulfone

Nanomaterials, 2013
Macromolecular modification of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF) was done with various proportions of sulfonic acid terminated, hyperbranched polysulfone (HPSU) with a view to prepare ion conducting membranes.
Surya Subianto, Namita Roy Choudhury, Naba Dutta   +2 more
doaj   +1 more source

A concise route to difluorinated analogues of cyclitols and sugars [PDF]

, 2008
Allyl ethers of trifluoroethanol are transformed to difluorinated analogues of deoxysugars via concise sequences involving dehydrofluorination/metallation, [3,3]-Claisen rearrangement, reduction, and RCM, affording cyclohexenediol substrates for ...
Kerouredan, E., Percy, J.M., Rinaudo, G., Singh, K.   +3 more
core   +3 more sources

Influence of isothermal heat-treatment duration on magnetic and structural properties of chemically carbonized poly (vinylidene fluoride) derivatives

Известия Томского политехнического университета: Инжиниринг георесурсов, 2019
Relevance of the work: Modern science and technology show interest to use of low-dimensional and nanodimensional materials based on carbon. One of the most prospective materials for synthesis of similar structures is poly (vinylidene fluoride).
Vladimir Zhivulin, Leonid Pesin, Olga Mezhenina, Igor Kovalyov, Natalia Zlobina, Mikhail Gavrilov, Viktoriya Morilova, Olga Koryakova   +7 more
doaj   +2 more sources

Synthesis, Reactivity, and Antibacterial Activity of gem-Difluoroalkene, Difluoromethyl, and Trifluoromethyl β-Lactams. [PDF]

Org Lett
New gem-difluoroalkenes were synthesized by the dehydrofluorination of the corresponding 4-CF3-β-lactams. An unexpected rearrangement mechanism of the ester moiety dependent on a stabilizing negative charge was observed. Hydrogenation to 4-CHF2-β-lactams
Skibinska M, Warowicka A, Koroniak H, Cytlak T, Crousse B.   +4 more
europepmc   +2 more sources

Lewis Acid Triggered Reactivity of a Lewis Base Stabilized Scandium-Terminal Imido Complex: C–H Bond Activation, Cycloaddition, and Dehydrofluorination

, 2016
A stable scandium-terminal imido complex is activated by borane to form an unsaturated terminal imido complex by removing the coordinated Lewis base, 4-(dimethylamino)­pyridine, from the metal center.
Xianghao Han (1769848), Christos E. Kefalidis (1415137), Xuebing Leng (1351092), Jiaxiang Chu (1769851), Jiliang Zhou (1351089), Laurent Maron (1346082), Yaofeng Chen (1351095)   +6 more
core   +2 more sources

Lewis Acid Triggered Reactivity of a Lewis Base Stabilized Scandium-Terminal Imido Complex: C–H Bond Activation, Cycloaddition, and Dehydrofluorination

, 2014
International audienceA stable scandium-terminal imido complex is activated by borane to form an unsaturated terminal imido complex by removing the coordinated Lewis base, 4-(dimethylamino)pyridine, from the metal center.
Han, Xianghao, Maron, Laurent, Chen, Yaofeng, Kefalidis, Christos E., Chu, Jiaxiang, Leng, Xuebing, Zhou, Jiliang   +6 more
core   +3 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