904 results about "Anthraquinones" patented technology

A supercapacitor including a gel electrolyte and two electrodes having a substrate, date stone activated carbon, a conductive carbon compound different from the date stone activated carbon, and a binding compound. A mixture of the date stone activated carbon, the conductive carbon compound, and the binding compound partially coats a surface of the substrate. The two electrodes are assembled in a symmetrical layered configuration with the surfaces coated with the mixture facing each other. The gel electrolyte is present between the surfaces coated with the mixture to form the supercapacitor. The gel electrolyte is a mixture of H2SO4, polyvinyl alcohol, and anthraquinone. Particles of the date stone activated carbon have a nanosheet morphology, and the nanosheets are stacked on top of each other to form a hierarchical structure.

The invention belongs to the technical field of catalysts, and particularly relates to an alumina-based catalyst for anthraquinone hydrogenation and a preparation method thereof.The preparation method comprises the following steps that 1, aluminum salt and PVP are added into deionized water, and an aluminum salt mixed solution is obtained; (2) adding ammonium salt and cyclic polysaccharide micromolecules into deionized water to obtain an ammonium salt mixed solution; (3) dropwise adding the aluminum salt mixed solution into the ammonium salt mixed solution while stirring, and performing aging, suction filtration, drying and calcination to obtain an alumina carrier; (4) impregnating the alumina carrier with a palladium salt solution; and (5) drying, roasting and reducing the impregnated alumina carrier to obtain the alumina-based catalyst for anthraquinone hydrogenation. Macromolecular PVP (Polyvinyl Pyrrolidone) and cyclic polysaccharide micromolecules are used as composite template agents for ammonium-aluminum coprecipitation, so that not only is an alumina carrier material with a high specific surface area prepared, but also the loading capacity on palladium is improved, the dispersion of palladium is promoted, and the hydrogenation efficiency is favorably improved.

The invention provides a hydrophilic modified HDPE composition and application thereof, and relates to the technical field of composite materials. The hydrophilic modified HDPE composition is prepared from the following raw material components in parts by weight: 100 parts of HDPE and 1 to 10 parts of a hydrophilic anthraquinone compound. Preferably, the raw material component also can comprise 0.1-2 parts of a carbon-based material. The hydrophilic anthraquinone compound is obtained by reacting an anthraquinone compound with a diisocyanate compound and then reacting with a hydrophilic compound. According to the hydrophilic modified HDPE composition disclosed by the invention, the hydrophilicity of HDPE is improved, and an anthraquinone structure is introduced, so that the denitrification effect on nitrogen-containing sewage can be improved.

The invention relates to the technical field of data processing, in particular to a liquid disperse dye for polyester fabrics and a use method thereof, and the dye comprises an azo or anthraquinone disperse dye main agent subjected to superfine grinding, a nonionic and anionic compound dispersant system, a fiber plasticizer and a stabilizer. According to the preparation method, molecular dynamics simulation and mesoscale dissipative particle dynamics simulation are combined, the synergistic effect of a dispersant adsorption configuration and double electric layer potential is quantified, and a nonlinear association rule of dynamic particle size control and dispersion stability is established; a multi-physics field coupling model is adopted to integrate fiber humidity, temperature gradient and pressure distribution parameters, and cross-scale collaborative optimization of microscopic interface action and macroscopic process parameters is achieved. According to the method, repetitive experiment iteration is replaced by digital design, the formula development period is remarkably shortened, the dyeing uniformity and the batch-to-batch reproducibility are improved, and the method is suitable for continuous dyeing production of high-density and superfine polyester fabrics.

Provided is an anthraquinone derivative represented by formula (9-1). In formula (9-1), R1 and R2 are each independently an amino group or a hydroxyl group and Y1, Y2, and Z are each independently a hydrogen atom, a C1-C10 alkyl group, a C1-C10 alkoxy group, a cyano group, a nitro group, a halogen atom, a C1-C10 halogenated alkyl group, an amino group, an alkylamino group, a piperidyl group, an aryl group, or a cyclohexyl group, the aryl and cyclohexyl groups being optionally substituted.　

The invention relates to an application of a cytochrome P450 reductase 10273 inactivating agent in construction of an aspergillus terreus engineering strain for high yield of emodin or a derivative thereof. The invention further relates to aspergillus terreus engineering bacteria for high yield of emodin or the emodin derivatives and a construction method of the aspergillus terreus engineering bacteria. By knocking out the cytochrome P450 reductase gene 10273, the activation of anthraquinone methyl hydroxylase 4804 is blocked in aspergillus terreus, so that the hydroxylation pathway of the emodin is blocked, the purity of the emodin and the emodin-3-methyl ether in aspergillus terreus cells is improved, the production cost of the emodin and the emodin-3-methyl ether is reduced, and the method is suitable for industrial production. And a foundation is provided for the microbial industrial synthesis of the emodin and the emodin-3-methyl ether.

The invention discloses an emodin anthraquinone high-yield engineering strain. According to the invention, mdpG and mdpF genes of aspergillus nidulans are exogenous introduced into a chassis strain aspergillus nidulans LO8030, so that the genetically engineered bacterium for producing emodin is obtained. Furthermore, the g1234 gene is knocked out from the genetically engineered bacterium for producing the emodin, so that the yield of the emodin can be obviously improved. The decarboxylase gene is further introduced in an exogenous manner, so that the yield of the emodin can be further remarkably improved. And on the basis, exogenous introduction of mdpK, mdpC and mdpB genes is carried out, such that the chrysophanol-producing genetically engineered bacterium is obtained. Or the rugG gene from talaromyces sp.YE3016 is introduced in an exogenous manner, so that the genetically engineered bacterium for producing the muscardine hydrochloride is obtained.

The invention belongs to the technical field of gas sensor materials, and particularly relates to a novel high-conductivity conjugated coordination polymer gas-sensitive material, an ammonia gas sensor and a preparation method. Copper salt and 1, 5-diamino-4, 8-dihydroxy anthraquinone or 1-amino-4-hydroxy anthraquinone are used as raw materials, two novel high-conductivity conjugated coordination polymer materials are prepared by adopting a simple solvothermal method, and the preparation method is simple in process and can be used for mass production of materials. The obtained material can form a film on planar electrodes at two ends to prepare a resistance-type ammonia gas sensor, so that ammonia gas can be detected in a concentration range of 2.3 ppb-100 ppm, and the defects of narrow detection range and insufficient sensitivity of a single material in the prior art are overcome.

The invention relates to the technical field of power cables, and provides a high-flame-retardant power cable which comprises a conductor, an insulating layer, a shielding layer and an outer sheath layer. The insulating layer is arranged outside the conductor, the shielding layer is arranged outside the insulating layer, and the outer sheath layer is arranged outside the shielding layer; the conductor is an aluminum alloy conductor; the insulating layer is a crosslinked polyethylene insulating layer; the outer sheath layer comprises the following components in parts by mass: 60-70 parts of polyethylene, 10-20 parts of polypropylene, 10-20 parts of an ethylene-vinyl acetate copolymer and 40-50 parts of a flame retardant, and the flame retardant comprises the following raw materials: aluminum hydroxide, aluminum oxide and a hydroxy anthraquinone compound in a ratio of 10: 1: (0.05-1). According to the technical scheme, the problems of low mechanical property and poor flame retardance of the power cable in the prior art are solved.

The invention relates to the field of preparation of 2-alkyl anthracene, and discloses a method for optimizing a 2-alkyl anthracene oxidation process based on a feeding mode, which comprises the following steps: adding a solution containing 2-alkyl anthracene and a catalyst into an oxidation reactor through feeding, and reacting in an oxygen-deficient environment to obtain a mixture containing 2-alkyl anthraquinone, and the feeding mode is continuous feeding. The concentration of 2-alkyl anthracene in the oxidation reactor can be controlled through the feeding rate by selecting a continuous feeding mode; the concentration of the 2-alkylanthracene in the oxidation reactor of the continuous feeding process is low, so that the conversion rate of the 2-alkylanthracene and the selectivity of the 2-alkylanthraquinone are remarkably improved, the content of tail oxygen is controlled within a safe range, and the economic benefit and the safety performance are increased.

The invention discloses an anthraquinone dye as well as a preparation method and application thereof. The anthraquinone dye disclosed by the invention comprises a compound with a chemical formula as shown in formula (I): # imgabs0 #, wherein W1-W8 are independently selected from H, OH, substituted or unsubstituted C1-C30 alkyl groups or groups containing adamantyl groups; and at least one of W1-W8 is a group containing adamantyl. The anthraquinone dye with high solubility and optical aging resistance is obtained by modifying an anthraquinone main body through adamantane and utilizing high chemical stability and steric hindrance effect of adamantane. The ink prepared from the anthraquinone dye has stability and excellent display effect in electrowetting display, and electrowetting with high light stability is obtained.

The invention provides an emulsion slow crosslinking type plugging control gel, which is in an oil-in-water type, and is prepared from the following raw materials in percentage by weight: 25 to 40 weight percent of nonionic monomer, 0.5 to 2 weight percent of dihydroxy anthraquinone, 5 to 16 weight percent of anionic monomer, 0.002 to 0.2 weight percent of initiator and the balance of water. The emulsion comprises the following components in percentage by weight: 10 to 35 percent of deionized water, 15 to 30 percent of non-polar solvent, 2 to 8 percent of emulsifier, 1 to 4 percent of emulsifying aid and 0.5 to 1.5 percent of phase inversion agent. According to the plugging adjusting gel, the modified functional monomer dihydroxy anthraquinone is added, and the dihydroxy anthraquinone and monomers such as acrylamide are copolymerized to form oil-in-water type polymer gel, so that the initial viscosity is low, the strength and the plugging rate are high, and the gelling time is controllable.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a preparation method of a palladium catalyst for hydrogen peroxide production by an anthraquinone process, which comprises the following steps: at a certain temperature, alumina powder is impregnated in a palladium salt solution for equivalent-volume impregnation for a certain time, and alumina comprises gamma-Al2O3 and alpha-Al2O3; after impregnation is completed, deionized water is added into the solid, chloride ions are removed through electro-adsorption after ultrasonic treatment, and then a filter cake is obtained through filtering; according to the preparation method of the palladium catalyst, the aluminum oxide with the crystal phase in the specific proportion is matched with the ultrasonic treatment and the electro-adsorption method, the prepared catalyst has the advantages of being high in selectivity, good in catalytic activity and mechanical property and stable in product quality, chloride ions are easy to remove, and waste of a large number of water resources is avoided.

A transparent container comprising an aqueous liquid laundry detergent composition wherein the detergent comprises: from 2 to 60 wt. % of surfactant; and a dye comprising an anthraquinone dye, a triphenylmethane dye, an azo dye or a combination thereof; and from 0.001 to 0.06 wt. % of a phenolic based fragrance wherein the container has an internal volume of from 0.1 to 10 L; and wherein maximum absorbance of the aqueous liquid laundry detergent in the range of from 400 to 700nm and as measured at a 1cm pathlength is less than 1.

The invention relates to viologen-anthraquinone composite electrochromic liquid and a preparation method thereof, the viologen-anthraquinone composite electrochromic liquid comprises 1.2-2.5 parts by mole of viologen salt, 0.8-1.5 parts by mole of anthraquinone derivative and 8-12 parts by mole of electrolyte; the viologen salt is ethyl viologen tetrafluoroborate or heptyl viologen tetrafluoroborate or octyl viologen tetrafluoroborate; the anthraquinone derivative is 1-ethylamino-4-hydroxy anthraquinone or acid blue 43; the preparation method comprises the following steps: preparing an electrolyte solution; adding purple refined salt and anthraquinone derivatives according to the formula; fully dissolving the electrochromic material to form uniform and transparent initial liquid; and degassing the initial liquid to remove oxygen dissolved in the initial liquid. The electrochromic liquid has the advantages that after the purple refined salt and the anthraquinone derivative are added into the dissolving solution according to the proportion of the formula, the two color-changing materials are jointly dissolved in the electrolyte, and when the two color-changing materials are reduced at the same time, spectrum superposition absorbed by the two color-changing materials can cover the whole visible region, so that black and white switching of the electrochromic liquid is realized, and the use effect is good.

The invention discloses an anthraquinone-based MOF photocatalytic material as well as a preparation method and application thereof. The anthraquinone-based MOF photocatalytic material is prepared by carrying out solvothermal reaction on a ligand DPAq and a nickel source in a mixed solvent, wherein the ligand DPAq is 2, 6-bis (pyrazol-4-yl)-9, 10 anthraquinone, and the mixed solvent is a composition of N, N-dimethylformamide and water. The anthraquinone-based MOF photocatalytic material shows an appropriate band gap and good ROS generation efficiency and shows excellent catalytic activity and selectivity when applied to benzylamine coupling reaction, the reaction selectivity reaches 100%, the product yield can reach 97%, and the catalytic reaction efficiency is high; the product can be recycled, and the yield of the product can still reach 92% after the product is recycled for 5 times.

The invention belongs to the field of water treatment, and particularly relates to a graphene-based quinone mediator membrane as well as a preparation method and application thereof. The graphene-based quinone mediator membrane comprises a membrane matrix, and graphene, amino imidazopyridine and humus which are dispersed in the membrane matrix, the membrane substrate is made of polyvinylidene fluoride / butadiene, the polyvinylidene fluoride / butadiene is a random copolymer of polyvinylidene fluoride and butadiene, and an anthraquinone modification unit is bonded on a butadiene structural unit of the random copolymer. The graphene-based quinone mediator membrane provided by the invention has very high initial denitrification rate and over-time denitrification rate.

The invention relates to the technical field of biochar preparation and sewage denitrification, in particular to a preparation method of quinone-rich biochar, a product and application of the quinone-rich biochar in strengthening iron-nitrogen circulation. The preparation method of the quinone-rich biochar comprises the following steps: drying, crushing and pyrolyzing a biomass material to obtain biochar; the biochar is soaked in an anthraquinone-2-sodium sulfonate solution, then filtering, washing and drying are conducted, and the quinone-rich biochar is obtained. According to the preparation method of the quinone-rich biochar, the biochar and the quinone-rich biochar are prepared by using aquatic plant yellow acorus calamus residues as raw materials, and reference is provided for resource utilization of aquatic plant biomass. The invention further provides a method for improving iron circulation-nitrogen conversion, the quinone-rich biochar has high quinonyl functional group content, and the iron circulation-nitrogen conversion efficiency can be remarkably improved by coupling the quinone-rich biochar with zero-valent iron.

The invention discloses an MXene composite material as well as a preparation method and application thereof, and belongs to the technical field of composite materials. The MXene composite material provided by the invention comprises an anthraquinone based covalent organic framework and aminated MXene, the anthraquinonyl covalent organic framework is covalently connected to the surface of the aminated MXene. The MXene composite material is obtained through covalent connection of an anthraquinone covalent organic framework and aminated MXene, on one hand, the covalent connection of the covalent organic framework and the MXene can reduce an electron transfer energy barrier, and therefore the utilization rate of redox active groups in the covalent organic framework is increased; on the other hand, MXene can improve the overall conductivity of the material, anthraquinone groups in the anthraquinone covalent organic framework can be combined through lithium bonds and can be converted into lithium polysulfide, and the MXene composite material is beneficial to preparation of lithium-sulfur batteries with excellent electrochemical performance.

The utility model relates to a slurry bed hydrogenation reactor for producing hydrogen peroxide by an anthraquinone process. The slurry bed hydrogenation reactor comprises a hydrogenation reactor, a recycle gas condenser and a degassing tank, wherein the bottom of the hydrogenation reactor is provided with a working solution feeding distributor and a hydrogen feeding distributor, the middle of the hydrogenation reactor is provided with a gas raising cylinder, the gas raising cylinder and a straight cylinder at the lower part of the reactor have the same diameter and are provided with a gap, and an overflow area is arranged above the gas raising cylinder; an annular space between the gas raising cylinder and the upper expanded section of the reactor is a discharging standing area, a discharging baffle is arranged at a discharging port of the standing area, a discharging pipe is connected with a degassing tank, and a gas phase balance pipe and a gas-liquid balance pipe are sequentially arranged at the top of the degassing tank from top to bottom; the top of the hydrogenation reactor is connected with the recycle gas condenser. By adopting internal and external circulation two-stage degassing and solid separation, the conditions that the discharged material of the hydrogen reactor carries hydrogen and the concentration of a catalyst is too high are avoided, and the consumption of raw materials is reduced.

The invention provides a polyurethane composite material and application thereof, and relates to the technical field of polyurethane materials. The polyurethane composite material consists of a component A and a component B, the component A comprises the following raw material components in parts by weight: 100 parts of polymer dihydric alcohol, 1-8 parts of a chain extender, 1-3 parts of a catalyst, 0-5 parts of a cross-linking agent, 0.1-2 parts of a carbon-based material, 1-10 parts of an anthraquinone compound and 0.5-2 parts of water; and the component B is an isocyanate curing agent and comprises a prepolymer with a plurality of ester bonds and urea bonds. The polyurethane composite material disclosed by the invention has relatively high mechanical strength, wear resistance and the like, and is suitable for treating nitrogen-containing sewage.

The invention belongs to the technical field of lithium ion battery materials, and discloses a semi-solid electrolyte and a lithium ion battery. The semi-solid electrolyte comprises an anhydrous solvent, a lithium salt, a functional additive and a polymer gel network, the polymer gel network is obtained by carrying out polymerization reaction on the following monomers in percentage by mass: 40 to 70 percent of acrylate monomer, 30 to 50 percent of polyether monomer and 1 to 10 percent of anthraquinone modified crosslinking monomer; the anthraquinone modified crosslinking monomer has a structural formula as shown in a formula (1). The anthraquinone modified crosslinking monomer is adopted to modify a polymer gel network of the semi-solid electrolyte, so that the ionic conductivity of the semi-solid electrolyte can be remarkably improved, meanwhile, the impedance with an electrode interface can be remarkably reduced, and a lithium ion transmission path is improved. Therefore, the electrochemical performance of the semi-solid lithium ion battery is obviously improved.

The invention relates to a silicon-based negative electrode additive for a lithium battery. The silicon-based negative electrode additive for the lithium battery comprises lithium-embedded polyamino-anthraquinone. The lithium battery silicon-based negative electrode additive provided by the embodiment of the invention comprises the lithium-intercalated polyamino-anthraquinone, and the lithium-intercalated polyamino-anthraquinone can provide additional active lithium ions for a battery system in charge and discharge cycles, so that lithium loss caused by generation of an SEI film on the surface of a negative electrode is made up, the first coulombic efficiency of the battery is improved, and the service life of the battery is prolonged. The release of the battery capacity is improved; meanwhile, the polyamino anthraquinone lithium has better mechanical property, solvent resistance, better elasticity and higher tensile strength, and can bear and buffer the volume change of silicon-based particles in the charge-discharge cycle process and improve the pulverization phenomenon of a silicon-based negative electrode, thereby enhancing the long cycle performance of the battery.

The invention belongs to the field of preparation of secondary battery electrode materials, and particularly relates to an anthraquinone conjugated coordination polymer electrode material for a secondary battery as well as a preparation method and application of the anthraquinone conjugated coordination polymer electrode material. The structure of the anthraquinone conjugated coordination polymer is shown as a formula # imgabs0 #, R1 and R2 are respectively and independently selected from O, S or NH, and R1 and R2 are not O at the same time; r3 and R4 are independently selected from a hydrogen atom, an amino group, a hydroxyl group or a sulfydryl group; m is a transition metal ion. The anthraquinone conjugated coordination polymer is used as a positive electrode of a secondary battery, the anthraquinone conjugated coordination polymer, a conductive agent and a binder are uniformly mixed in a dispersion liquid, then a current collector is uniformly coated with the mixture, and then vacuum drying is performed to obtain the positive electrode of the secondary battery. The technical problems of low specific capacity, low energy density and rapid degradation of capacity and cycle performance of the secondary battery are solved.

The invention relates to the technical field of dimming films, in particular to a dye PDLC composition and a PDLC dimming film. Based on the total weight of the dye PDLC composition as 100%, the dye PDLC composition comprises the following components in percentage by weight: 35-66% of a liquid crystal composition, 3-7% of an anthraquinone dichroic dye, 30-60% of a polymer precursor, 0.05-3% of a photoinitiator and 0.2-1% of a spacer, and the polymer precursor comprises an oligomer and a reactive diluent in a mass ratio of 1: (2-7). According to the dye PDLC composition provided by the invention, all the components have a synergistic effect, and a PDLC dimming film prepared from the dye PDLC composition has relatively high off-state haze, relatively low on-state haze and relatively low driving voltage, and also has excellent properties of light absorption, heat insulation, wide all-light dimming range, color adjustability and the like.

The invention provides a sulfonated modified COF-based hydrogel based on a TPAD skeleton, and a preparation method and application thereof, and belongs to the field of water treatment. The preparation method comprises the following steps: S1, synthesizing a TPAD-NHBoc amino monomer by using reagents such as 1, 4, 5, 8-tetrachloroanthraquinone and the like; s2, sequentially adding a TPAD-NHBoc amino monomer, a Dha aldehyde monomer, dioxane and trifluoroacetic acid into a glass tube according to a certain proportion, carrying out ultrasonic treatment, stirring, putting into a reaction kettle, and reacting at 115-125 DEG C for 96-120 hours; s3, after the reaction is finished and cooling is performed, carefully taking out the blocky gel from the glass tube, respectively immersing the blocky gel into dioxane and DMF, and repeatedly replacing the solvent for washing; s4, washing the gel, soaking the washed gel in a DMF solution containing 1, 3-propane sultone, and carrying out a reaction at 75-85 DEG C for 16-20 h to obtain sulfonated modified gel; s5, the obtained sulfonated modified COF-based gel is soaked in DMF, acetone, methanol and water for multiple times of soaking and washing, and the hydrogel is obtained. The sulfonated modified hydrogel based on the TPAD skeleton has excellent solar photo-thermal water evaporation performance.

The invention relates to the technical field of catalysts, and discloses a catalyst, a preparation method thereof and a method for preparing hydrogen peroxide through anthraquinone hydrogenation. The catalyst comprises a modified carrier and an active component loaded on the modified carrier; the modified carrier comprises an inorganic heat-resistant oxide and a modified component, and is characterized in that the modified component comprises rare earth metal, and the atom dispersity of the rare earth metal in the catalyst is not less than 92%. The rare earth metal in the catalyst provided by the invention is highly dispersed, so that the catalyst has excellent catalytic performance; according to the method for preparing the catalyst provided by the invention, the rare earth metal can be highly dispersed on the carrier in a short time, and the agglomeration phenomenon in the roasting process is avoided, so that the catalyst has excellent catalytic performance, hydrogenation efficiency, hydrogen peroxide selectivity and relatively high production capacity.

The invention relates to the technical field of chemical production, in particular to a hydrogen peroxide working solution purifying and washing process. Comprising the following steps: S1, constructing a hydrogen peroxide working solution purifying and washing system; s2, injecting the working solution into a stock solution kettle in a hydrogen peroxide working solution purifying and washing system for reaction, and then carrying out solid-liquid separation; s3, performing dissolution treatment on a product obtained through solid-liquid separation; s4, after the dissolving treatment is completed, washing with water, performing secondary separation when precipitates appear in the liquid, and temporarily storing the obtained separation liquid; s5, purifying the carclazyte bed in the washing system by using the hydrogen peroxide working solution to separate residual substances, recombining effective component substances, and finally regenerating and temporarily storing a finished product; according to the invention, the production speed of octahydro-anthraquinone in the working solution is reduced, the conversion or extraction process of octahydro-anthraquinone is improved, the purpose of reducing by-product components in the working solution to be controllable is realized, the reaction activity of the working solution is improved, the production consumption is reduced, and long-period safe and stable operation of the device is realized.

The invention belongs to the technical field of material chemistry and sewage detection, and particularly relates to a nanofiber for detecting Cu < 2 + > as well as a preparation method and application thereof. The invention provides a preparation method of a 1, 4-DHAQ (at) GEL-PCL nanofiber membrane, which comprises the following steps: dissolving gelatin and polycaprolactone in an organic solvent to obtain a substrate solution, and putting the substrate solution into 1, 4-dihydroxy anthraquinone for electrostatic spinning to obtain the nanofiber membrane. The nanofiber membrane can be used for preparing a solid fluorescence sensor for detecting Cu < 2 + > in a water body. The nanofiber membrane is prepared by only one step, the raw materials are green, environment-friendly, economical and easy to obtain, and the treatment process is simple; the original performance can be maintained and stored for six months under the normal-temperature dark condition; the prepared fluorescence sensor is short in incubation time, suitable for rapid detection of large-batch samples, high in sensitivity and good in stability; the prepared fluorescence sensor is a solid sensor and is convenient to carry. The sensor is resistant to interference of various ions, good in specificity and suitable for Cu < 2 + > detection in various wastewater treatment fields.

A silicone hydrogel contact lens formulation comprising [a] at least 40 wt% of a polymerisable siloxane, [b] at least 30 wt% of hydrophilic N-vinyl amide monomer, such as vinyl-N-methyl acetamide (VMA), N-vinyl pyrrolidone (NVP), N-vinyl formamide, or N-vinyl acetamide; [c] triphenylphosphine (TPP) and [d] 1,4-bis[(2-methacryloxyethyl)amino]-9,10-anthraquinone (RB247). The contact lens formulation can further comprise an anthraquinone blue tinting agent, a benzophenone UV-absorbing agent and / or a benzotriazole HEVL absorber to stabilise the silicone hydrogel contact lens formulation.