65 results about "Diphenylacetylene" patented technology

The invention discloses a diphenylacetylene LCD compound to increase negative dielectric aeolotropic value, which possesses structural formula as formula (I), wherein R is C1-9 straight chain normal paraffin; R' is C1-3 straight chain normal paraffin or alkoxy.

The invention relates to a polymer dispersed liquid crystal electronic paper and a manufacturing method thereof. A composite film is constituted by two transparent flexible conductive films and a polymer dispersed liquid crystal layer, wherein, electrodes are etched on the two flexible transparent conductive films. A polymer is modified polyurethane acrylate which is added by a surfactant and lecithin, and liquid crystal is dielectric switching liquid crystal material which is the mixture of 20 percent biphenyl ester and 80 percent difluoro diphenylacetylene or the product with the same series. When a low-frequency electric field is imposed on the polymer dispersed liquid crystal electronic paper, the polymer dispersed liquid crystal electronic paper is in the transparent open state, and the transparent open station is still maintained after removing the electric field; when a high-frequency electric field is imposed, the polymer dispersed liquid crystal electronic paper is in the scattering closed state, and the scattering closed state is still maintained after removing the electric field. The manufacturing method of the polymer dispersed liquid crystal electronic paper is to form the weak anchoring polymer which is packaged by a dielectric switching liquid crystal droplet structure by separating after mixing the weak anchoring polymer with the dielectric switching liquid crystal. The manufacturing method combines the natures of the weak anchoring polymer and the dielectric switching liquid crystal with the dual-frequency drive of low-frequency writing and high-frequency erasing so as to realize the stable zero-field of the polymer dispersed liquid crystal, thereby obtaining the new electronic paper technology or being applied as a new product of dimming glass.

The invention discloses a dicyclohexyl ethylene group substituted diphenylacetylene liquid crystal compound and a preparation method thereof. The structural general formula of the dicyclohexyl ethylene group substituted diphenylacetylene liquid crystal compound is shown in the specification, wherein (F)m, (F)n and (F)x respectively represent fluorine atom substitution, m, n and x represent substitution number of the fluorine atoms and the value of m, n and x is 0 or 1, and the cyclohexyl is trans-cyclohexyl; both R and R' represent C1-C15 alkyl, C1-C15 alkenyl, C1-C15 alkoxy, C1-C15 alkenyloxy, fluoro-substituted C1-C15 alkyl or fluoro-substituted C1-C15 alkenyl. The dicyclohexyl ethylene group substituted diphenylacetylene liquid crystal compound not only has high clearing point, wide nematic phase section, large birefringence, and low optical absorption coefficient, but also has low melting point, low viscosity and good intermiscibility, and can be used in liquid crystal optical elements; the dicyclohexyl ethylene group substituted diphenylacetylene liquid crystal compound with side fluorine can also be used in a double frequency liquid crystal display mode.

The invention discloses a synthetic method of benzil and derivatives thereof. The diphenylacetylene compound shown in formula I is used as the raw material and is subjected to reaction in a CH3CN/H2O solvent in the presence of a copper catalyst/select flour oxidant system, so as to obtain the benzil derivatives shown in formula II. The synthetic method disclosed by the invention has the advantages of cheap and easily available catalyst, available oxygen source, environment protection, moderate reaction condition, convenient operation and the like, and the functional groups have good universality.

The invention discloses a method for highly selectively reducing an alkyne to a Z-olefin. The method comprises the steps of adding cuprous chloride, a ligand and potassium t-butoxide to a Schlenk reaction tube, conducting vacuumizing, adding an organic solvent A under protective gas conditions, and conducting uniform stirring at room temperature; and then dissolving a diphenylacetylene compound shown in a formula I and bis(pinacolato)diboron in an organic solvent B to obtain a solution, dropwise adding the solution to the reaction tube, conducting stirring for reaction at room temperature for1-12 hours, and conducting post-treatment on an obtained reaction solution to obtain a Z-olefin and derivatives thereof represented by a formula II, wherein the ligand is 1,3-bis(2,4,6-trimethylphenyl)imidazolium chloride or 1,3-bis(2,6-diisopropylphenyl)imidazolium chloride. The method takes safe cheap ethanol as a hydrogen source, is mild in reaction conditions, saves energy consumption, and inaddition, has the characteristics of high yield, high selectivity, high substrate universality and easy operation.

The invention provides a mixed liquid crystal material having high double-refractivity within terahertz frequency band. A series of derivatives R1-PPT (2.6-F)P-R2, accounting for 70-85% and having fluoro-diphenylacetylene skeleton structure, are used as a component a; a series of derivatives R1-P'(3-F)PP-F, accounting for 10-15% and having a fluoro-diphenyl pyridine skeleton structure, are used as a component b; a series of derivatives R1-PTP-R2, accounting for 2-10% and having a diphenylacerylene skeleton structure, are used as a component c; a series of derivatives R1-PT(2,6-F)P-R2, accounting for 2-10% and having a fluoro-diphenylacerylene skeleton structure, are used as a component d; and the components a, b, c and d are subjected to melt blending so as to form a mixed liquid crystal. The the mixed liquid crystal material has the maximum double-refractivity within the terahertz frequency band, has the advantages of wide-temperature liquid crystal phase (from -15 DEG C to 150 DEG C) and low viscosity, can be used for production of quick-response compact THz modulation devices with low working voltage, and is applicable to application fields of material sciences, biomedicines, nondestructive detection and the like in a wide scope.

The invention relates to phosphine imide ligand (E)-(2-(diphenyl phosphino) benzylidene) hydrazine, which belongs to a diphosphine ligand containing imide groups and contains two atoms coordinated with metal ions. A synthetic method is characterized in that the final target is prepared through preparing an intermediate of 2-diphenylphosphine benzaldehyde; and phosphine imide ligand and cuprous salt form a catalyst system, and the catalyst system is used for cross-coupling catalytic reaction between terminal alkyne and sp2 type carbon halide for preparing substituted diphenylacetylene. The phosphine imide ligand (E)-(2-(diphenyl phosphino) benzylidene) hydrazine has the advantages that the catalyst system has high reaction reactivity on aryl iodide substrates and also has a certain activity on aryl bromide, the applicable substrate range is wide, and in addition, self-coupling products can be perfectly controlled not to be generated; the synthetic method is simple, and the post treatment is convenient; expensive and toxic palladium is not used in the catalysis, and cheap, economic and clean copper which is easy to obtain is adopted; and organic amine is not used as an alkaline solvent, in addition, the reaction time is short, the catalyst consumption is low, and good application prospects are realized in industrial production.

An oligomer having di-phenylethynyl endcaps is disclosed. The capped oligomer has the formula:

D-A-D

wherein

D is a di-phenylethynyl endcap; and

A is an oligomer selected from the group consisting of imidesulfone; ether; ethersulfone; amide; imide; ester; estersulfone; etherimide; amideimide; oxazole; oxazole sulfone; thiazole; thiazole sulfone; imidazole; and imidazole sulfone.

The invention discloses a diphenylacetylene butene liquid crystal compound and a synthesis method thereof. The structural formula of the compound is shown as the specification, wherein (F)x and (F)y both represent fluorine atom substitution, x and y indicate the substitution number of fluorine atom, and can be 0 or 1, and R represents C1-C15 alkyl or C1-C15 alkoxy. The method provided by the invention employs acetal deprotection and Witting reaction to prepare the diphenylacetylene butene liquid crystal compound, the preparation method is simple in operation, the product yield and purity are high, and the obtained compound has the characteristics of low melting point, low viscosity, wide liquid crystal phase interval, good low temperature performance, direct preparation of liquid crystal mixture and the like, and is suitable for liquid crystal display, especially for TFT liquid crystal display technology.

The invention relates to the technical field of fluorescent materials, in particular to a piezochromic tetraphenylethylene compound as well as a preparation method and application thereof. The tetraphenylethylene-based compound has excellent piezochromism and molecular aggregation-induced fluorescence, can change color without solvent fumigation and heating, and has a rapid recovery property. The preparation method comprises the following steps: reacting diphenylacetylene with bis (pinacolato) diboron to prepare stilbene (pinacolato) diboron, and reacting with a p-bromobenzene substituent to obtain a final product. Due to the piezo-chromic effect and the rapid recovery property of the piezo-chromic tetraphenylethylene compound, the piezo-chromic tetraphenylethylene compound can be applied to preparation of piezo-chromic materials at room temperature and is further applied to the fields of brain tumor imaging technologies, near-infrared probe technologies, photoelectric devices and the like.

The present invention relates to a method for producing a picolinic acid compound. Specifically, the present invention relates to a method for producing a picolinic acid compound, which comprises reacting an aromatic compound that contains a phenyl group represented by the following formula (I), (II), or (III) with aromatic ring dioxygenase, aromatic ring dihydrodiol dehydrogenase, and aromatic ring diol dioxygenase, and obtaining a picolinic acid compound (I′), (II′), or (III′).

The present invention provides processes for the preparation of zuclomiphene, as well as intermediates useful in the preparation thereof. In particular, processes are provided for the carbometallation of diphenylacetylene with a compound of Formula (3) to afford either zuclomiphene or an intermediate which is converted to zuclomiphene.