11 results about "Methyl radical" patented technology

The invention relates to the technical field of quantum computing and molecular electronic devices, in particular to a probabilistic bit device based on polyfluoroaryl methyl free radicals and a preparation method of the probabilistic bit device. According to the probabilistic bit device, the coupling efficiency of molecules and electrodes is improved by virtue of the characteristic that the paramagnetic unpaired electron spin state of tri (polyfluoroaryl) methyl free radical molecules can be used as a random expansion physical entropy source and high electronegativity and stability formed by modification of a plurality of strong electron-withdrawing fluorine atoms in the molecules. During the operation period of the device, the spin fluctuation can efficiently regulate and control tunneling current passing through molecules, promote random conversion between output high and low current states, show excellent random binary fluctuation characteristics, and simultaneously have high sensitivity and long coherence time. Compared with the prior art, the device has remarkable advantages in the aspects of device stability, energy efficiency ratio and external field controllability. The preparation method is simple and convenient to operate, mild in reaction condition and beneficial to large-scale production.

The present application pertains to a methane dehydrogenation process subjecting a methane feed to a novel SiO2 catalyst under dehydrogenation conditions and producing hydrogen, ethylene, an aromatic, or any mixture thereof. In another embodiment, the present application pertains to a novel catalyst for methane dehydrogenation. The catalyst comprises amorphous particles of SiO2. The amorphous particles have a particle size with a nominal diameter of from about 5 nm to 1 cm. The amorphous particles of SiO2 comprise a Lewis acidity sufficient to activate one or more C—H bonds in methane and generate one or more methyl radicals when the catalyst is subjected to methane dehydrogenation conditions. In another embodiment, the present application pertains to method of making the novel catalyst for methane dehydrogenation.

Alkyl-silicates and alkyl-silicate-containing organosilicon compounds. The alkyl-silicate-containing organosilicon compound includes at least 90% by weight, preferably at least 95% by weight, of alkyl silicates of average formula (I)[SiO4 / 2]a[(RxO)SiO3 / 2]b[(RyO)SiO3 / 2]b′[(RxO)2SiO2 / 2]c [(RxO)(RyO)SiO2 / 2]c′[(RyO)2SiO2 / 2]c″[(RxO)3SiO1 / 2]d [(RxO)2(RyO)SiO1 / 2]d′[(RxO)(RyO)2SiO1 / 2]d″[(RyO)3SiO1 / 2]d′″  (I).Where the radicals Rx are each independently selected from radicals that meet at least one of the following conditions: (a) where Rx is a substituted or unsubstituted, C4-C20 hydrocarbon radical that is branched at the α-carbon atom, (b) where Rx is a substituted or unsubstituted, C5-C20 hydrocarbon radical that is doubly branched at the β-carbon atom, and / or (c) where Rx is an unsubstituted or alkyl-substituted cyclopentyl, cyclohexyl or cycloheptyl radical having a total of not more than 9 carbon atoms. Where the radicals Ry are each independently selected from (i) hydrogen, (ii) methyl radical, and (iii) ethyl radical.

The invention relates to the technical field of organic electroluminescent materials, in particular to a methyl radical compound and an organic electroluminescent device. According to the methyl free radical compound provided by the invention, a structural unit with a conjugation characteristic and electron donor / acceptor capability is introduced into a molecular skeleton, and the electron distribution and configuration rigidity of molecules are accurately regulated and controlled, so that the dual-state spin characteristic is maintained, meanwhile, the excited state non-radiative attenuation is effectively inhibited, and the photoinduced or electroluminescent efficiency of the methyl free radical compound is improved; meanwhile, the methyl free radical compound contains an aza-aromatic group with a stable free radical center and is connected to a push-pull electronic structure through a pi-conjugate bridging unit, the luminescence performance is adjusted through the charge transfer effect, and the methyl free radical compound is suitable for application scenes such as high-resolution display, biological imaging and low-energy-consumption infrared communication.

A method of making a semiconductor device includes forming a cap layer comprising a first metal over a substrate. The method further includes modifying the cap layer to form an organometallic film. Modifying the cap layer includes adding ammonia to a top surface of the cap layer; reacting a portion of the ammonia with methyl radicals; and removing hydrogen from the ammonia and methyl groups of the methyl radicals to form the organometallic film.

The invention discloses a low-temperature methane oxidative coupling series catalyst and a preparation method thereof, and belongs to the field of catalysts. The invention aims to solve the problem that methyl free radicals generated in the existing methane oxidative coupling mainly depend on gas phase coupling to generate a C2 product, so that the low-temperature catalytic activity of the methyl free radicals is seriously limited. The catalyst is formed by connecting an oxide Eu2MxO3 with an acidic molecular sieve b-KZSM-5 in series, and is applied to methane oxidative coupling reaction, oxygen is activated by using a rare earth oxide rich in oxygen vacancies so as to activate methane, and generated methyl free radicals are subjected to C-C coupling at acidic sites of the acidic molecular sieve so as to generate a C2 product. The C-C coupling efficiency is improved in a manner of connecting molecular sieves in series, so that the low-temperature reaction activity of the catalyst is greatly improved.

The application discloses a method for preparing C2-C6 olefins by chemical chain oxidative coupling of methane and carbon dioxide. The method utilizes the coupling synergy of an oxygen carrier and CO2, stimulates selective oxidation of methane, promotes directional recombination coupling of methyl radicals under the action of a catalyst to generate ethane, and further generates C2-C6 low-carbon olefins such as ethylene. The method improves the methane conversion rate, produces additional negative carbon benefits, and has good emission reduction effect.

The present application relates to the technical field of quantum computing and molecular electronic devices, and particularly relates to a probability bit device based on a polyfluoro aryl methyl radical and a preparation method thereof. The probability bit device can be used as a random fluctuation physical entropy source by virtue of the characteristic that the unpaired electron spin state of the paramagnetic three (polyfluoro aryl) methyl radical molecule can be used as a random fluctuation physical entropy source, and the high electronegativity and stability formed by the modification of multiple strong electron-withdrawing fluorine atoms in the molecule improve the coupling efficiency of the molecule and the electrode. During the operation of the device, the spin fluctuation can efficiently regulate the tunneling current through the molecule, promote the random transition between the high and low current states of the output, and exhibit excellent random binary fluctuation characteristics, while having high sensitivity and long coherence time. Compared with the prior art, the present application has significant advantages in device stability, energy efficiency ratio and external field controllability. The preparation method is simple in operation and mild in reaction conditions, and is conducive to large-scale production.

This application relates to a methane dehydrogenation process in which a methane feedstock is subjected to a novel SiO2 catalyst under dehydrogenation conditions to produce hydrogen, ethylene, aromatics, or any mixture thereof. In another embodiment, this application relates to a novel catalyst for methane dehydrogenation. The catalyst comprises amorphous particles of SiO2. The amorphous particles have a nominal particle size of about 5 nm to 1 cm. The amorphous particles of SiO2 have sufficient Lewis acidity to activate one or more C-H bonds in methane and produce one or more methyl radicals when the catalyst is subjected to methane dehydrogenation conditions. In another embodiment, this application relates to a method for making a novel catalyst for methane dehydrogenation.

The present invention describes a cost-effective, essentially chlorine-free process for the production of fluorinated olefins such as tetrafluoroethylene (TFE), hexafluoropropylene (HFP), and vinylidene fluoride (VDF) from fluoropolymer residues. The fluoropolymers are decomposed by pyrolysis at temperatures above 600°C, and the pyrolysis gases are reacted with ethylene or methyl radicals under varying conditions. This process makes it possible to obtain all the aforementioned olefins.