53 results about "Pyridinium Compounds" patented technology

An electrophoretic display device includes an electrophoretic dispersion liquid in which electrophotographic particles are dispersed. Each of the electrophotographic particles has a surface salt structure consisting of an acid-derived anionic group and any one of cationic compounds including a specific imidazolium compound, a specific pyridinium compound, a specific quaternary ammonium compound, and a specific trialkylamine-derived compound.

In a dye-sensitized photovoltaic device including a semiconductor fine particle layer 2 on which a sensitizing dye is adsorbed, a counter electrode 3, and an electrolyte layer 4 between the electrodes, a molecule having a plurality of acid functional groups for adsorption onto the semiconductor electrode is used as a molecule of the sensitizing dye, and part of the acid functional groups is neutralized with an alkaline compound which is a hydroxide of at least one metal or compound selected from the group consisting of Li, Na, K, tetramethylammonium, tetraethyl ammonium, tetrapropyl ammonium, tetrabutyl ammonium, an imidazolium compound, and a pyridinium compound. In this manner, a dye-sensitized photovoltaic device that can achieve high photoelectric conversion efficiency even in the cases where a dye containing readily aggregating acid functional groups, such as carboxylic acid, as the adsorbing groups is used. A method for making the device is also provided.

An aqueous, alkaline, cyanide-free electrolyte bath for deposition of zinc alloy layers on substrate surfaces is described, which contains cationic pyridinium compounds as brighteners and polyamines as complexing agents. The electrolyte bath is suitable for electroplating bright and even zinc alloy coatings.

The invention discloses a bifunctional basic ionic liquid and a novel water-phase catalytic synthesis method of a substituted pyridinium compound by using the same. In the method, a used catalyst is the bifunctional ionic liquid simultaneously containing a Lewis base and a Bronsted base; aromatic aldehyde, malononitrile and a sulfhydryl compound are used as raw materials; water is used as a reaction medium; and a multi-substituted pyridinium compound is obtained through catalytic synthesis. Compared with the prior art, the invention has the following advantages: (1) the raw materials are wide in sources, the preparation process is convenient, and the double-base catalyst has high activity, is hydrostable and can not be deactivated; (2) the reaction can be performed at room temperature, thereby ensuring that the conditions are mild; (3) the water solution containing the catalyst can be recycled and is environment-friendly; and (4) water is used instead of an organic solvent, thereby achieving environment and economic double benefits. Thus, the synthesis method of a multi-substituted pyridinium compound is efficient and environment-friendly, and is beneficial to large-scale industrial production.

The present invention is directed to the amphiphilic pyridinium compounds, such as for suppressing IL-8 secretion and production. The present invention further provides methods of making and using such compounds for the treatment of the IL-8 related diseases, such as cystic fibrosis.

The invention relates to a method for the treatment or prevention of diseases or conditions associated with vascular endothelium dysfunction or liver injury comprising the administration to a patient in a need of such treatment or prevention of a therapeutically or prophylactically effective amount of a compound selected from the group consisting of:wherein R represents hydrogen atom, CH3, OH, pyridyl (C5H4N), 1-methylpyridyl (C5H4N—CH3) or pyridyl substituted with hydroxy group ((OH)C5H3N), and X represents a physiologically acceptable counterion.

Methods of forming graphene may include reacting a dispersed mixture, comprising fly ash, a charged heteroaromatic compound, particularly a pyridinium compound, such as a 1-(4-pyridyl)-pyridinium salt, and a solvent, particularly an alcohol, such as ethanol, with a polymeric oxidizing agent, preferably polymer-supported pyridinium chlorochromate, to form a second mixture; and contacting the second mixture at a temperature of 120 to 180° C. with a gas stream comprising at least 0.1 vol. % CH4 and at least 10 vol. % H2 to form graphene on the fly ash. Methods of managing waste may comprise using fly ash waste to produce graphene. Devices for implementing such methods may involve steel cylindrical reaction vessels including a cover through which a valve-stoppable pipe is fed, which reaction vessel is at least partially surrounded by a heating device, and suitable for handling solvent and fly ash, as well as for receiving gas inflow through the pipe.

A method for producing a reaction product comprising an ester-functional silane, the method comprising: i) reacting a composition comprising: a) a haloorganosilane, b) a metal salt of a carboxy-functional compound, c) a phase transfer catalyst comprising a bicyclic amidine, an iminium compound, or a mixture thereof, provided that the iminium compound is not an acyclic guanidinium compound or pyridinium compound, and d) a co-catalyst, provided that the co-catalyst is optional when the phase transfer catalyst comprises the iminium compound.

The present invention addresses the problem of providing a palladium plating solution in which occurrence of defective parts such as pin holes on a palladium coating is reduced, and in which heat resistance performance equivalent to that obtained conventionally can be obtained even when a gold plating coating formed on the palladium coating is made thinner. The problem was overcome by: a palladium plating solution containing a soluble palladium salt as a palladium source, and a specific pyridinium compound in which an alkyl group is bonded to a nitrogen atom at the 1-position and one to five of the 2- to 6-positions are substituted with one or more specific substituents selected from the group consisting of an alkyl group, an aryl group, a carboxy group, an alkoxycarbonyl group, a sulfo group, an alkoxy sulfonyl group, an amino group, an alkylamino group, a dialkylamino group, and a cyano group; and a palladium coating obtained by performing palladium plating on a nickel, nickel alloy, copper, or copper alloy coating using the palladium plating solution.

For the reproducible manufacturing of particularly uniform and brilliant i.e., highly bright copper coatings that are leveled and ductile as well, a copper plating bath is utilized that contains as an additive a mixture of oligomeric phenazinium compounds. The mixture contains at least one phenazinium compound selected from the group comprising compounds containing two monomeric units and compounds containing three monomeric units having the general chemical formulae <I> and <II> set forth in the patent claims and in the specification as well as further oligomeric phenazinium compounds.

The present invention is a class of fluorescent compounds derived from hydrazine-2-yl-pyridine containing a triazaborolopyridinium core. The compounds are prepared using a stepwise procedure that begins with a reaction of a hydrazinylpyridine with an aldehyde or ketone to produce a hydrazine. A general formula for the invention is

The present invention provides an aqueous redox flow battery comprising a negative electrode immersed in an aqueous liquid negative electrolyte, a positive electrode immersed in an aqueous liquid positive electrolyte, and a cation-permeable separator (e.g., a porous membrane, film, sheet, or panel) between the negative electrolyte from the positive electrolyte. During charging and discharging, the electrolytes are circulated over their respective electrodes. The electrolytes each comprise an electrolyte salt (e.g., a lithium or sodium salt), a redox reactant. The negative redox reactant comprises a pyridinium compound of Formula (I) as described in the specification

Stable electroless copper plating baths include pyridinium compounds to improve rate of copper deposition on substrates. The copper from the electroless plating baths can be plated at low temperatures and at high plating rates.

The invention discloses an organic molecule-carbon black compound-containing lithium ion battery negative electrode material and a preparation method thereof. The negative electrode material comprisesan organic molecule-carbon black compound, wherein the organic molecule-carbon black compound is formed from organic molecule and carbon black, and the organic molecule is selected from at least oneof a fused ring pyranium salt compound and a fused ring pyridinium compound. The preparation method comprises the following steps of dissolving the organic molecule in acetone; adding the carbon black, and continuing to stir; drying a solvent to obtain the organic molecule-carbon black compound; adding a bonding agent to prepare battery paste; and coating the battery paste on a copper foil, and performing drying to obtain the organic molecule-carbon black compound-containing lithium ion battery negative electrode material. The negative electrode material has favorable specific capacity and cycle stability, and high capacity can be achieved under a room temperature. The preparation method is simple in step, and the cost is reduced.

Methods for the synthesis of N-substituted carboxylated pyridinium compounds by reaction of a pentamethine precursor with a primary amine are provided. In this reaction an N-substituted alkoxycarbonyl pyridinium heterocycle is formed.

The present invention concerns pyridinium compounds, a synthesis method for their preparation, metal or metal alloy plating baths containing said pyridinium compounds and a method for use of said metal or metal alloy plating baths.The plating baths are particularly suitable for use in filling of recessed structures in the electronics and semiconductor industry including dual damascene applications.

The compositions of the invention are novel benzothiazol-based pyridinium compounds with potent acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory activities. Such compositions can be used, for example, to treat Alzheimer's Disease and other neurodegenerative disorders. The compounds of the invention can also be used to prevent or treat the neurotoxic effects of nerve agents (e.g., sarin gas or insecticides).

The present invention addresses the problem of providing: an electrolytic nickel (alloy) plating solution which is able to fill micro holes or micro recesses 14 within an electronic circuit componentwith nickel or nickel alloy 18 without the generation of defects such as voids and seams; a nickel or nickel alloy plating / filling method which uses this electrolytic nickel (alloy) plating solution;and a method for producing a three-dimensional microstructure. The above-described problem has been solved by filling the micro holes or micro recesses 14 with use of an electrolytic nickel (alloy) plating solution which contains a specific N-substituted carbonyl pyridinium compound.

The present invention provides novel mito-pyridinium compounds, prodrugs and the uses thereof for the treatment of cancer, particularly drug resistant cancer.

The invention provides tetraphenyl ethylene borate pyridinium salt, a preparation method and application thereof, and a reagent and method for detecting fructose. The structural formula of the tetraphenyl ethylene borate pyridinium is shown as a formula (I) or a formula (II). According to the invention, a series of tetraphenyl ethylene borate pyridinium compounds are prepared by adopting specificraw materials and methods, can be used as fructose detection reagents, have high selectivity and high sensitivity detection capability on fructose, can detect fructose-containing samples including honey, seminal plasma and the like, and have wide application prospects.