35 results about "Triphenylmethane" patented technology

The invention discloses a low-dielectric polyimide film based on a fluorine-containing triphenylmethane unit as well as a preparation method and application of the low-dielectric polyimide film, and the low-dielectric polyimide film is a novel polyimide material FPOPF-6FDA obtained by polymerizing a fluorine-containing triaryl methane diamine monomer and 4, 4 '-(hexafluoroisopropenyl) diphthalic anhydride. The fluorine-containing triarylmethane diamine monomer is preferably 4, 5-diphenyl-1, 3, 5-triazine. According to the invention, 4, 4 '-((4-fluoro-3-phenoxy phenyl) methylene)) bis (2-fluoroaniline) is used, specifically, 4, 4'-diaminotriphenylmethane is used as a functional core, a fluorine-containing group and a large-volume side chain group are introduced, and non-coplanar twisted conformation destroys close packing of molecular chains and increases the chain spacing, so that the effect of a charge transfer complex (CTC) is weakened, and the photoelectric conversion efficiency is improved. And the heat resistance and optical transparency of polyimide are maintained while the dielectric constant of the material is reduced.

The application discloses a triphenylmethane polyether dye and a preparation method thereof, and the preparation method comprises the following steps: (1) adding an organic catalyst and an oxidant into a triphenylmethane polyether dye leucoaqueous solution in the interval of 40-60 DEG C, adding an acid-binding agent to maintain a proper pH, and completing oxidation; the organic catalyst is a ferrocene-rotene iron compound; (2) adjusting the pH with an acid-binding agent aqueous solution, removing the organic catalyst by hot filtration, removing water through vacuum distillation of the filtrate, and performing pressure filtration to obtain the triphenylmethane polyether dye. The improved rotene iron catalyst is used in the application, the catalytic effect is obviously improved, the reaction temperature and activation energy are reduced, the defects of excessive hydrogen peroxide oxidation are overcome, and the obtained product meets the EN71-3 standard.

The application relates to a conductive silver glue and a preparation method and application thereof, and belongs to the technical field of bonding materials.The conductive silver glue comprises an epoxy resin, an active diluent, a curing agent, an accelerator and silver powder; the epoxy resin comprises a main body resin and an auxiliary resin; the main body resin comprises a glycidyl amine type epoxy resin; and the auxiliary resin comprises a combination of a phenolic epoxy resin, a triphenylmethane type epoxy resin and an alicyclic epoxy resin.The conductive silver glue provided by the application is a high-reliability conductive silver glue of an epoxy resin system, has the characteristics of high moisture and heat resistance, high high-temperature bonding force, high residual glue rate and low resin overflow, effectively solves the problem that the existing conductive silver glue has low reliability under high-temperature and high-humidity conditions, is suitable for complex scenes, and has a simple preparation method and controllable cost.

The invention relates to a non-aqueous electrolyte solution for a lithium ion secondary battery and the lithium ion secondary battery. Provided is a technique capable of suppressing the growth of precipitated lithium metal. The non-aqueous electrolyte solution disclosed herein contains a supporting salt, a non-aqueous solvent, and a compound having a triphenylmethane skeleton. The compound contains a branched hydrocarbon group and a hydroxyl group. The branched hydrocarbon group is present on a phenyl group in the triphenylmethane skeleton and has 3 or more carbon atoms. The hydroxyl group is present on the phenyl group and is adjacent to the branched hydrocarbon group.

The invention belongs to the technical field of biosensing detection, and particularly discloses a label-free ratio fluorescence sensor and application thereof in quinine detection. The label-free ratio fluorescent aptamer sensor takes isothiocyanate as an internal reference signal and a fluorescent dye as a detection signal, and is obtained by mixing and incubating a quinine specific nucleic acid aptamer, a triphenylmethane fluorescent dye and isothiocyanate in a buffer solution. According to the invention, isothiocyanate is introduced as an internal reference signal, triphenylmethane dye is selected as a target response fluorescence signal molecule, and the quinine is detected by using the obvious fluorescence change of the target response fluorescence signal molecule in the binding-dissociation process of the target response fluorescence signal molecule and a quinine specific nucleic acid aptamer. The label-free ratio fluorescence sensor has excellent selectivity and stability, can be widely applied to the fields of food safety supervision, drug quality control, environmental water quality detection and the like, and is particularly suitable for rapid detection and emergency monitoring of quinine under the condition of limited resources.

This invention relates to the field of high-entropy lithium manganese oxide cathode materials, specifically to a method for preparing high-entropy lithium manganese oxide cathode materials. This method addresses the problems of short cycle life, poor structural stability, and inadequate rate performance in traditional lithium manganese oxide cathode materials due to Jahn-Teller distortion and manganese leaching. The method involves ball milling a manganese source, lithium salt, and dopant ions M to obtain a mixture, followed by sintering in a muffle furnace, cooling, grinding, and sieving to obtain a lithium manganese oxide matrix material. The lithium manganese oxide matrix material and a silane-containing triphenylmethane-structured polyimide are then ball milled, coated with a low-temperature heat treatment solution, cooled, and sieved to obtain the high-entropy lithium manganese oxide cathode material. This high-entropy lithium manganese oxide cathode material exhibits high cycle stability, excellent rate performance, and good high-temperature safety, making it suitable for high-performance lithium-ion batteries.

The invention discloses a preparation method and application of a magnetic sulfonated covalent organic framework, and belongs to the technical field of preparation of organic pollutant adsorbents. The method comprises the following steps: dissolving a surfactant, a protonic acid catalyst, an amino monomer, carboxylated magnetic nanoparticles and a sulfonic acid functional reagent in an organic solvent / water mixed solvent to obtain a suspension; dissolving an aldehyde group monomer in an organic solvent to obtain a solution; and mixing the turbid liquid with the solution, and obtaining the magnetic sulfonated covalent organic framework through a solvothermal method. The Fe3O4 (at) COF not only has the functions of efficiently adsorbing cationic organic pollutants and the like by modifying a sulfonic acid group, but also has the characteristics of large specific surface area, good thermal stability, strong specificity, high repeated utilization rate and the like, and has the advantages of smaller particle size, better adsorption effect, stronger enrichment capacity and the like compared with a covalent organic framework of an unmodified sulfonic acid functional group; the composite material can be used for detection and efficient adsorption of cationic pollutants in water and aquatic products, especially triphenylmethane organic dyes.

The application provides a wear-resistant enameled copper wire and a preparation method thereof, and belongs to the technical field of enameled copper wires.The preparation method comprises the following steps: repeatedly coating wear-resistant paint on a copper wire and curing the wear-resistant paint into a paint film, and then cooling and winding the copper wire to obtain the wear-resistant enameled copper wire.The preparation method of the wear-resistant paint comprises the following steps: adding 4,4'-diamino-4"-hydroxytriphenylmethane and 2,2-bis-[4-(4-aminophenoxy)phenyl]propane into a polymerization bottle, adding N,N-dimethylacetamide, stirring and dissolving, adding 3,3',4,4'-benzophenonetetracarboxylic dianhydride, stirring and polymerizing, and obtaining a polyamic acid solution one; adding 4,4'-diamino diphenyl ether into the polymerization bottle, adding N,N-dimethylacetamide, stirring and dissolving, adding pyromellitic dianhydride, stirring and polymerizing, and obtaining a polyamic acid solution two; adding the polyamic acid solution one and the polyamic acid solution two into the polymerization bottle, adding a silane coupling agent, stirring, adding N,N-dimethylacetamide and a peroxide initiator, and stirring uniformly to obtain the wear-resistant paint; and the wear resistance of the wear-resistant enameled copper wire can be effectively improved.

The objective is to provide a photosensitive resin composition containing a dye that exhibits excellent hue stability and, consequently, is less susceptible to deterioration of its photosensitive properties even after long-term storage, by suppressing structural changes in the dye during storage. [Solution] A photosensitive resin composition comprising (A) an alkali-soluble polymer, (B) a compound having an ethylenically unsaturated bond, (C) a photopolymerization initiator, (D) a dye, and (E) an antioxidant, wherein the (D) dye comprises one or two selected from the group consisting of (D1) a dye having a triphenylmethane structure and (D2) a dye having a triphenylmethyl cation structure, and the (E) antioxidant comprises a specific compound represented by N-isopropyl-N'-phenyl-p-phenylenediamine.

The invention discloses a triphenylmethane dye metabolite rapid detection method based on magnetic nano-enzyme selective oxidation and a preparation method of magnetic nano-enzyme, a novel nano-enzyme MnFe2O4 / PSS of sodium polystyrenesulfonate (PSS) modified magnetic ferrite (MnFe2O4) is prepared by adopting a coprecipitation method, the morphology and Zeta potential of the nano-enzyme are changed by doping PSS, and the magnetic nano-enzyme can be used for rapidly detecting the metabolite of the triphenylmethane dye. The nano-enzyme can react with leuco crystal violet and leuco malachite green more quickly, the leuco crystal violet and the leuco malachite green are oxidized into corresponding crystal violet and malachite green without further oxidation, after the reaction is completed, the error of a detection system can be reduced by utilizing magnetic separation, and by detecting the ultraviolet absorption peak intensity of oxidation products of the nano-enzyme, the detection accuracy is improved. A triphenylmethane dye metabolite oxidation-detection system is established, the magnetic nano-enzyme has good magnetism, the influence of the nano-enzyme on the absorbance of the system can be reduced through simple magnetic separation, and the purposes of reducing experimental errors and accurately detecting are achieved.

The invention relates to a photosensitive colored resin composition, a color filter, a manufacturing method of the color filter and a liquid crystal display. The photosensitive colored resin composition comprises a colorant (A), an alkali-soluble resin (B), a photopolymerizable compound (C), a photoinitiator (D) and a solvent (E). The nickel content in the photosensitive colored resin composition ranges from 1 ppm to 100 ppm, and the colorant (A) includes a triphenylmethane colorant (A-1). The manufacturing method of the color filter comprises the step of forming a pixel layer by using the photosensitive colored resin composition. The color filter is manufactured by the manufacturing method. The liquid crystal display comprises the color filter. By using the coloring agent (A) including the triphenylmethane coloring agent (A-1) and controlling the nickel content to be 1 ppm to 100 ppm, the size of foreign matters after a multi-stage thermal process in a pixel layer formed by the photosensitive colored resin composition can be reduced.

The application belongs to the technical field of disease detection, and particularly relates to application of triphenylmethane compounds in detection of Alzheimer's disease. The application is accidentally discovered that triphenylmethane compounds, especially crystal violet, can be inserted into misfolded beta-sheets of A beta oligomers, so as to cause change of spectrum. Macroscopically, oxidation and discoloration are caused, so that the triphenylmethane compounds can be used for monitoring and early screening of Alzheimer's disease patients. Compared with antigen-antibody preparation of antigen-antibody immunoreaction products, the product in the application has the defects of complicated antigen-antibody preparation and high cost, and the product in the application has low cost. Meanwhile, the main component of the application is a chemical reagent, has good stability, does not need refrigeration storage condition, is convenient to transport, and is convenient to use. Meanwhile, the technical scheme of the application effectively avoids the cleaning process of enzyme-labeled plates and chemiluminescence experiments, and does not need special equipment, so that the basic medical institutions can use the application, and therefore the application has good practical application value and application prospect.

Provided is a bonded magnet which can be suitably used for applications in which it is immersed or brought into contact with oil, the bonded magnet comprising a cured product of a curable composition, the curable composition comprising: a magnetic powder; at least one or more of a novolak phenol-type epoxy resin, a cresol novolak-type epoxy resin, or a triphenylmethane-type epoxy resin having an epoxy equivalent of 250 g / eq or less; and a curing agent having a hydroxyl equivalent of 150 g / eq or less and being at least one or more of a novolak-type phenol resin, a cresol novolak-type phenol resin, or a triphenylmethane-type phenol resin.

The present invention provides a bonded magnet that exhibits excellent heat resistance and oil resistance, making it suitable for applications where it is immersed in or in contact with oil, such as in automotive main motors and oil pumps. [Solution] A bonded magnet for use in applications involving immersion in or contact with oil, comprising a cured product of a curable composition containing magnetic powder, an epoxy resin which is at least one of phenol novolac type epoxy resin, cresol novolac type epoxy resin, or triphenylmethane type epoxy resin, and a phenol resin curing agent which is at least one of novolac type phenol resin, cresol novolac type phenol resin, or triphenylmethane type phenol resin.

The invention provides hollow silicon dioxide and a preparation method thereof. The method comprises the following steps that a mixed solution containing a template agent and a catalyst is obtained, the template agent is subjected to self-assembly under the action of the catalyst, a spherical template is separated out, and the template agent is a cationic triphenylmethane organic matter, specifically alkaline blue 7; adding a silicon source into the mixed solution, and carrying out hydrolysis reaction on the silicon source to form silicon dioxide on the surface of the spherical template; after the hydrolysis reaction is finished, carrying out solid-liquid separation, and collecting a solid phase to obtain a hollow silicon dioxide precursor; and calcining the hollow silicon dioxide precursor to obtain the hollow silicon dioxide. According to the method for preparing the hollow silicon dioxide, the cationic triphenylmethane organic matter is used as the template agent for the first time, the spherical template is formed through self-assembly of the cationic triphenylmethane organic matter, the silicon dioxide with a uniform hollow structure is synthesized, and a brand new method is provided for synthesis of the hollow silicon dioxide.

The invention discloses an auramine O hapten, an artificial antigen as well as a preparation method and application thereof, and relates to an auramine O hapten, an artificial antigen, an antibody, a colloidal gold immunochromatography card as well as preparation and application of the auramine O hapten, the artificial antigen, the antibody and the colloidal gold immunochromatography card in auramine O detection. The auramine O hapten prepared by the invention completely retains a dimethylamino characteristic group with positive charges on a benzene ring of auramine O, so that the immunogenicity of the antigen is improved; the prepared auramine O artificial antigen and monoclonal antibody are used for an enzyme-linked immunosorbent assay method, the detection sensitivity and specificity are high, the IC50 to auramine O reaches 0.18 ng / mL, the linear range is 0.09 ng / mL-0. 34 ng / mL, the cross reaction to other common triphenylmethane basic dyes is very low and is smaller than 0.5%, and the application prospect is wide.

A process for preparing a compound of formulaincluding oxidizing the triphenylmethane sulfone of formula (V) with a quinone chosen from 1,4-benzoquinone, 1,2-benzoquinone, a di(C1-C4)alkyl-1,4-benzoquinone, a di(C1-C4)alkyl-1,2-benzoquinone, a mono(C1-C4)alkyl-1,4-benzoquinone and a mono(C1-C4)alkyl-1,2-benzoquinone. A crystalline form of patent blue, sodium salt, can be achieved.

The application provides a preparation method and application of a self-supporting intrinsic microporous uranium adsorption film, and belongs to the technical field of uranium adsorption materials. The polymer has a structural formula shown in formula I: the polymer is dissolved in an organic solvent to obtain a casting solution; the casting solution is coated on the surface of a base material, and then immersed in a non-solvent for phase inversion to obtain the self-supporting intrinsic microporous film uranium adsorption film. In the application, cyanobenzaldehyde and spirocyclic tetraols are used to increase the molecular weight of the polymer through a carbon-carbon single bond mode, and the triphenylmethane in the macromolecular main chain can significantly increase the free volume of the polymer and simultaneously retain the substituents in the monomer, thereby creating favorable conditions for constructing large-scale pore structures and enriching uranium adsorption sites. Experimental results show that the uranium adsorption capacity of the uranium adsorption film prepared from the polymer reaches 183.1 mg / g, and the uranium element enrichment efficiency is as high as 91.5%.

The invention discloses a preparation method of a Taniaphos supported catalyst by a solvent weaving method, and belongs to the technical field of organic chemistry. The method comprises the following steps: adding a Taniaphos ligand and a metal salt into a reaction container at room temperature, adding a solvent in an inert gas atmosphere, stirring at room temperature until the Taniaphos ligand and the metal salt are completely dissolved, and then adding an aryl-containing comonomer to obtain a reaction solution; adding Lewis acid or Bronsted acid, and carrying out Friedel-Crafts alkylation reaction to obtain a supported Taniaphos catalyst; wherein the aryl-containing comonomer comprises at least one of biphenyl, triphenylbenzene, diphenylmethane, triphenylmethane, furan, thiophene and pyrrole. The method is simple and efficient, the supported Taniaphos catalyst shows excellent catalytic activity and good stability in an asymmetric allyl alkylation reaction of a cinnamyl bromide substrate, and the product can be obtained only through solvent extraction and distillation without column chromatography. The activity of the catalyst remains unchanged after the catalyst is recycled for five times.

To provide a technology that can suppress the growth of precipitated metallic lithium. [Solution] The non-aqueous electrolyte disclosed herein comprises a supporting salt, a non-aqueous solvent, and a compound having a triphenylmethane skeleton. The compound comprises a branched hydrocarbon group and a hydroxyl group. The branched hydrocarbon group is located on a phenyl group in the triphenylmethane skeleton and has three or more carbon atoms. The hydroxyl group is located on the phenyl group and is adjacent to the branched hydrocarbon group.

The invention discloses a broad-spectrum alkyne metathesis catalyst and a preparation method of a ligand of the broad-spectrum alkyne metathesis catalyst. In an inert gas atmosphere, in the presence of a palladium catalyst and alkali, pinacol borate substituted triphenylmethane and aryl halide are subjected to a heating reaction in a mixed solvent of an organic solvent and water, and the tridentate ligand is obtained. The method comprises the following steps: mixing a tridentate ligand and a molybdenum carbine precursor in an organic solvent, stirring and reacting to obtain a tridentate ligand metal catalyst, then adding a metathesis substrate, and catalyzing alkyne metathesis reaction at 25-110 DEG C. The invention provides a simple, convenient and efficient preparation process, synthesis of various ligands can be realized, and a new technical approach is provided for expansion of a ligand library. The catalyst prepared by using the ligand has high solvent and substrate applicability, overcomes the dependence of a known catalyst system on a high-toxicity solvent carbon tetrachloride, and can realize efficient conversion of a substrate which is generally difficult to carry out alkyne double decomposition reaction.

The present application relates to a photosensitive resin composition, a color filter and a manufacturing method thereof, and a liquid crystal display. A photosensitive resin composition includes a colorant (A), an alkali-soluble resin (B), a photopolymerizable compound (C), a photoinitiator (D), a compound (E) having a structure represented by formula (V), and a solvent (F). The colorant (A) includes a triphenylmethane-based colorant (A-1). In formula (V), R 24 , R 25 , R 26 , R 27 , X, M are defined as described in the specification and claims. The present application also provides a manufacturing method of a color filter, a color filter manufactured by the aforementioned manufacturing method, and a liquid crystal display including the color filter. The present application can provide a photosensitive resin composition with good high-fineness temporal filtration stability by the triphenylmethane-based colorant (A-1) and the compound (E) having a structure represented by formula (V). Formula (V)

The application discloses a preparation method and application of a branched polyarylide ion exchange membrane, and comprises the following steps: preparing a branched polyarylide high polymer by using p-terphenyl, diphenylethane, triphenylmethane and indigo; preparing 6-bromoalkyl-1-methylpiperidine monomers by using 1,3-dibromopropane and N-methylpiperidine; after reaction of the branched polyarylide high polymer, the 6-bromoalkyl-1-methylpiperidine monomers and K2CO3, pouring into ethyl acetate, filtering and drying, piperidine functionalized branched polyarylide high polymer is obtained; after dissolving the piperidine functionalized high polymer in N-methylpyrrolidone, casting on a glass plate, drying into a film, soaking in a KOH solution, a branched polyarylide ion exchange membrane is obtained. − The branched polyarylide ion exchange membrane has excellent OH conductivity, and meets the application requirement of anion exchange membrane electrolysis water.

The invention discloses a preparation method of a water-soluble colorimetric probe based on hydrogen bonds and application of the water-soluble colorimetric probe in anion recognition. The preparation method comprises the following steps: carrying out a Schiff base condensation reaction on an aldehyde group derivative of a xanthene or triphenylmethane indicator (such as phenolphthalein) and an aminoguanidine derivative to obtain a type I probe, and carrying out a reduction reaction to obtain a type II probe. The prepared two types of colorimetric probes can identify F <->, AcO <-> and SO4 < 2-> anions in water with high selectivity and high sensitivity, and can realize visual detection through obvious color change. A binding constant gt calculated by an ultraviolet-visible titration experiment; the water-based anion probe is superior to most of existing water-based anion probes. The probe has the advantages of low raw material cost, simple and convenient synthesis steps, quick response, obvious colorimetric signal and the like, and has a good application prospect in the fields of anion recognition, environmental pollutant detection, water treatment and the like.

The invention provides a preparation method and application of a self-supporting inherent microporous uranium adsorption film, and belongs to the technical field of uranium adsorption materials. The polymer disclosed by the invention has a structural formula as shown in a formula I. The polymer is dissolved in an organic solvent to obtain a membrane casting solution; the surface of a base material is coated with the membrane casting solution, then the base material is immersed in a non-solvent for phase inversion, and the self-supporting intrinsic microporous membrane uranium adsorption membrane is obtained. The molecular weight of the polymer is increased through cyanated benzaldehyde and spirotetraphenol in a carbon-carbon single bond mode, the free volume of the polymer can be remarkably increased through triphenylmethane in a macromolecular main chain, substituent groups in monomers are synchronously reserved, and favorable conditions are created for constructing a large-scale pore structure and enriching uranium adsorption sites. Experimental results show that the uranium adsorption capacity of the uranium adsorption film prepared from the polymer to uranium reaches 183.1 mg / g, and the uranium enrichment efficiency reaches up to 91.5%.

Provided is a compound that has a metal powder content of 96.5 mass% or more, has outstanding fluidity, and increases the mechanical strength at high temperatures (e.g., 150°C or higher) of a molded body containing the compound uncured or semi-cured. The compound contains a metal powder and a resin composition. The metal powder is a soft magnetic material. The resin composition contains an epoxy resin and a curing agent. The curing agent contains a triphenylmethane-type phenol resin and a phenol novolac resin. The metal powder content in the compound is 96.5-98.0 mass%. The resin composition content in the compound is 2.0-3.5 mass%. The mass ratio of the triphenylmethane-type phenol resin and the phenol novolac resin to 100 parts by mass of the epoxy resin is 47.0-63.0 parts by mass.

The application discloses a color developing agent stabilizer and a stabilizing method. The application provides a color developing agent stabilizer, which comprises a reducing substance and a weak acid buffer. The pH of the weak acid buffer is 3.8-6.2. The reducing substance is one or more of sodium sulfite, sodium bisulfite, sodium thiosulfate or 1-mercapto glycerol. The color developing agent is one or both of a phenothiazine color developing agent or a triphenylmethane color developing agent. The color developing agent can be stably stored by using the stabilizer. The method for stably storing the color developing agent is to dissolve the color developing agent in the stabilizer. The color developing agent can be stably stored in the stabilizer for two weeks, and the stabilizer does not have an inhibiting effect on the subsequent use of the color developing agent. The application not only solves the problems of low stability and spontaneous color development of the color developing reagent, but also avoids the influence of the stabilizer on the performance of the color developing agent, and provides a new method for storing the color developing agent.

A process for synthesizing a compound of formula (I)including: (a) condensing the benzaldehyde compound of formula (II) with the dialkylaniline of formula (III) to give the triphenylmethane of formula (IV); (b) treating the triphenylmethane of formula (IV) with sulfuric acid to form the triphenylmethane sulfone of the formula (V); and (c) oxidizing the triphenylmethane sulfone of formula (V) with a quinone. Such a process may be used to prepare patent blue.

The present application relates to a kind of high Tg modified high modulus bismaleimide resin composition and its preparation method, prepreg and application, the bismaleimide resin composition includes: 5-10 parts of bisphenol A double allyl ether, 50-80 parts of bismaleimide resin, 5-20 parts of cyanate resin, 5-15 parts of epoxy resin;The molecular main chain of the bismaleimide resin includes aromatic ring or biphenyl structure;The epoxy resin includes multiple continuous aromatic heterocyclic epoxy resin, phenol biphenyl type epoxy resin or triphenylmethane type epoxy resin.Aiming at the problem that the Tg of existing conventional bismaleimide prepreg system is generally limited to below 350 DEG C, due to the establishment of bismale-imide-triazine-oxazoline ketone full interpenetrating polymer network, the crosslinking density reaches the extreme, the glass transition temperature of system is stably jumped to above 387 DEG C (the physical extreme deduction is more than 390 DEG C), thereby having the ability of long-term safe bearing under the harsh thermodynamic environment of more than 350 DEG C.

This disclosure concerns aromatic and polyaromatic eutectic mixtures and their uses as solvents, particularly in liquid-liquid separation. The mixtures may include compounds including di-tert-butyl-benzenes, biphenyls and terphenyls, polycyclic aromatic hydrocarbons selected from naphthalenes, acenaphthenes, anthracenes and pyrenes, fluorenes and carbazoles, 2,5-Diphenyloxazoles, compounds of formula (I), triphenylmethane, tribenzylamine, and 2,5-dibenzylphenol.