744 results about "Conjugated system" patented technology

Processes are provided for the storage and release of hydrogen by means of a substantially reversible catalytic hydrogenation of extended pi-conjugated substrates which include large polycyclic aromatic hydrocarbons, polycyclic aromatic hydrocarbons with nitrogen heteroatoms, polycyclic aromatic hydrocarbons with oxygen heteroatoms, polycyclic aromatic hydrocarbons with alkyl, alkoxy, nitrile, ketone, ether or polyether substituents, pi-conjugated molecules comprising 5 membered rings, pi-conjugated molecules comprising six and five membered rings with nitrogen or oxygen hetero atoms, and extended pi-conjugated organic polymers. The hydrogen, contained in the at least partially hydrogenated form of the extended pi-conjugated system, can be facilely released for use by a catalytic dehydrogenation of the latter in the presence of a dehydrogenation catalyst which can be effected by lowering the hydrogen gas pressure, generally to pressures greater than 0.1 bar or raising the temperature to less than 250° C. or less, or by a combination of these two process parameters.

Various non-limiting embodiments disclosed herein relate to ophthalmic devices comprising photochromic materials having extended pi-conjugated systems. For example, various non-limiting embodiments disclosed herein provide a photochromic material, such as an indeno-fused naphthopyran, which comprises a group that extends the pi-conjugated system of the indeno-fused naphthopyran bonded at the 11-position of thereof. Further, the photochromic materials according to certain non-limiting embodiments disclosed herein may display hyperchromic absorption of electromagnetic radiation as compared to conventional photochromic materials and/or may have a closed-form absorption spectrum that is bathochromically shifted as compared to conventional photochromic materials. Other non-limiting embodiments relate to methods of making the ophthalmic devices comprising photochromic materials.

The present invention relates to intercalator pseudonucleotides. Intercalator pseudonucleotides according to the invention are capable of being incorporated into the backbone of a nucleic acid or nucleic acid analogue and they comprise an intercalator comprising a flat conjugated system capable of co-stacking with nucleobases of DNA. The invention also relates to oligonucleotides or oligonucleotide analogues comprising at least one intercalator pseudo nucleotide. The invention furthermore relates to methods of synthesising intercalator pseudo nucleotides and methods of synthesising oligonucleotides or oligonucleotide analogues comprising at least one intercalator pseudonucleotide. In addtition, the invention describes methods of separating sequence specific DNA(s) from a mixture comprising nucleic acids, methods of detecting a sequence specific DNA (target DNA) in a mixture comprising nucleic acids and/or nucleic acid analogues and methods of detecting a sequence specific RNA in a mixture comprising nucleic acids and/or nucleic acid analogues. In particular said methods may involve the use of oligonucleotides comprising intercalator pseudo nucleotides. The invention furthermore relates to pairs of oligonucleotides or oligonucleotide analogues capable of hybridising to one another, wherein said pairs comprise at least one intercalator pseudonucleotide. Methods for inhibiting a DNAse and/or a RNAse and methods of modulating transcription of one or more specific genes are also described.

The invention relates to the application field of photoelectric conversion materials in the fine chemistry industry, in particular to ethylene naphthalene and paradiazine dye and application thereof to dye-sensitized solar cells. The dye is characterized by taking ethylene naphthalene and paradiazine and derivatives thereof as a conjugated system, one end of the conjugated system is connected with adjacent dicarboxyl or a single carboxyl as electron withdraw group which is used to be absorbed on TiO2, and the other end thereof is connected with different electron-donating groups to form an electric push-pull type organic dye. As taking the ethylene naphthalene and paradiazine as the conjugated system ensures a fine plane structure, by connecting the conjugated system with the electron group and the electron-withdrawing group, electrons are easy to transfer in case of excited state and the dye is led to generate unique photoelectrochemical property, therefore enjoying fine application performance in dye-sensitized solar cells; in addition, the ethylene naphthalene and paradiazine dye features simple synthetic method and easily available raw materials, thus being capable of replacing noble metal photosensitive dyes with relatively high price and effectively reducing the cost of the dye-sensitized solar cells.

The invention relates to a DNA-targeted o-dicyano-acenaphtho pyrazine compound in the field of application of antineoplastic medicaments. The compound is prepared by taking acenaphthene quinone as a raw material and performing bromination, cyclization and aromatic nucleophilic substitution reaction. The compound is characterized in that: one end takes an amino straight chain of a flexible side chain or an annular group as an electron-donating group, while the other end takes two cyanogen groups as electron-withdrawing groups; the two ends form an electron deficient large-plane conjugated system; and the structure accords with an ideal DNA intercalator. The compound shows obvious inhibitory activity to an in vitro test of MCF-7 (human mammary cancer cells).

The invention belongs to the technical fields of material preparation and photocatalysis, and discloses a phenyl ring modified graphite-like carbon nitride photocatalyst, and a preparation method and an application thereof. The method comprises the following steps: 1, dissolving nitrogen-containing organic micro-molecules and a phenyl ring-containing compound in a solvent, and evaporating the obtained solution until the solution is dry in order to obtain a mixed precursor; and 2, roasting the mixed precursor to obtain the phenyl ring modified graphite-like carbon nitride photocatalyst, wherein the nitrogen-containing organic micro-molecules are one or more of urea and melamine; and the phenyl ring-containing compound is one or more of trimesic acid, phenol, benzoic acid and benzaldehyde. The electron structure of the photocatalyst is changed by phenyl ring modification, so the pi electron delocalization of graphite-like carbon nitride is excited, the absorption of visible lights is improved, compounding of photon-generated carriers is inhibited, and the photocatalytic hydrogen production performance is improved. The method has the advantages of simple preparation, no expensive device and good practical application prospect.

The invention relates to an organic electroluminescent material of a large-pi conjugated system. A structural general formula is shown in the specification, wherein A represents aromatic groups. By the organic electroluminescent material, phenanthro-carbazole series derivatives are synthesized; the series derivatives are large in conjugated system and high in film-forming performance, can form a large large-pi conjugated system, and can be used as organic electroluminescent devices (OLED) easily; and particularly, by substituting the introduction of an F atom, electron transition can be regulated, the emission range of different materials emitting blue light from light blue to dark blue can be formed, the demand on light-emitting materials and particularly the required light blue light emitting materials is met. Simultaneously, the organic electroluminescent material is easy to synthesize and purify and low in cost, and can meet the demand of industrial development. The efficiency of the material can be regulated, the efficiency can be improved obviously, the film-forming performance is improved obviously, and the service life of the material is prolonged obviously; and the material is easy and convenient to synthesize and wide in application range, can be used in multiple materials of the devices, and has a bright prospect.

The invention discloses a novel diamine compound, and a preparation method and an application thereof. The preparation method of the novel functional diamine compound comprises the following steps: a large conjugate structure comprising benzophenone carbonyl group is obtained; the ketone carbonyl group is subjected to a Wittig or Wittig-Horner reaction, such that a large conjugate system with a triphenylethylene/tetraphenylethylene structure and comprising a halogen atom is obtained; the halogen atom is further subjected to a Suzuki reaction or a plurality steps of reactions, such that a monoamine compound comprising a triphenylethylene/tetraphenylethylene large conjugate system is obtained; the monoamine compound is subjected to a reaction with halogenated nitrobenzene, such that a dinitro monomer comprising triphenylamine and the triphenylethylene/tetraphenylethylene large conjugate system is obtained; and the dinitro monomer is reduced into the novel diamine compound, such that the novel functional diamine compound comprising triphenylamine and a triphenylethylene/tetraphenylethylene structure is obtained. The synthesis method provided by the invention is simple. Purification is easy. The method is suitable for industrial productions. The synthesized diamine compound has a significant aggregation-induced emission property, and can be used for synthesizing high-performance and functional polymers such as polyamide, polyimide, polyamideimide, polyesterimide, and the like.

The invention provides a fluorescent probe represented by the formula (I), wherein R1 and R2 are independently selected from H or an aromatic vinyl group, and at least one of R1 and R2 is the aromatic vinyl group; R3 is selected from H, F, Cl, Br, OH, OCH3, N(CH3)2 or C1-C6 alkyl; and R4 is selected from C1-C6 alkyl. Compared with the prior art, because the fluorescent probe provided by the invention has a relatively large electronic conjugated system and plane, the intensity of the intramolecular charge transfer effect can affect the molecular fluorescence emission intensity; when the fluorescent probe and the G-quadruplex generate a specific action, the flexibility of intramolecular rotatable double bonds is restricted, the intramolecular charge transfer effect is enhanced, and the fluorescence is also enhanced significantly; moreover, the fluorescent probe provided by the invention has the advantages of low biotoxicity, phototoxicity and photobleaching property, good light stability, good water solubility and good cell membrane permeability.

The invention discloses a fluorine-containing functional diamine monomer with a large conjugated structure as well as a synthesis method and an application thereof. The synthesis method comprises the following steps of: firstly allowing di-halogenated fluorine to react with halogenated nitrobenzene, linking halogen atoms with other chemical groups to form a large conjugated system, and finally reducing binitro into diamine; or firstly carrying out a chemical coupling reaction between two active hydrogen atoms in fluorine to form the large conjugated structure, carrying out a Suzuki reaction on the large conjugated structure and two halogen atoms to obtain the diamine, and finally obtaining the novel fluorine-containing functional diamine monomer. By means of the specific structure of the diamine monomer, the polymer obtained by the diamine monomer has the advantage of good solubility, and the diamine monomer and the polymer can also achieve certain photoelectric properties; and the synthesis method has the advantages of simple process and easy purification procedure, thus being applicable to industrial production. The fluorine-containing functional diamine monomer has obvious characteristics of luminescence aggregation and induction, thus the diamine monomer can be used for synthesizing high-performance functional polymers such as polyamide, polyimide, polyamideimide, polyesterimide and the like.

The present invention provides an electroconductive composition containing an aqueous solvent-soluble electroconductive polymer as represented by formula (1) which has a π-electron conjugated system and exhibits electroconductivity in electron conducting mechanism and an aqueous solvent-soluble resin.

By using the electroconductive composition of the invention, reduction in resistivity and enhancement in electroconductivity of the coating film can be achieved, and the coating film can be suitable used, for example, as an electroconductive coating film, as a coating film for a coated article and in an anode buffer layer of an organic electronic device.

The invention relates to an organic blue phosphorescent main body material with fluorene as a center unit structure, and a preparation method and application thereof in a blue organic light-emitting diode (OLED). In the material, fluorene is used as a main body structure, and different electron properties of groups are bonded to 3-, 6- and 9- positions of fluorene, thereby the conjugated system of the main body material is effectively reduced, the effective molecular weight of the compound is increased, and the triplet energy and glass transition temperature of the material are improved to some extent. In addition, the polarity of the compound can be adjusted by drawing/withdrawing electron groups; compared with the commonly used blue phosphorescent main body materials including 4,4'-(9-carbazole)-biphenyl (CBP) and N,N'-dicarbazoyl-1,3-benzene (m-CP), the efficiency roll-off problem under a high luminescence condition of the blue phosphorescent OLED devices is effectively solved under a condition of appropriate polarization rate; and the main body material can be widely used in the organic light-emitting field.

The invention relates to a stable perovskite film and a preparation method thereof and an application of the perovskite film in photoelectric devices. According to the perovskite film, an anti-solventcontaining small organic molecules of a conjugated pi system is dropwise added in a one-step spin-coating preparation process, and a mixed layer of the small organic molecules and perovskite is formed after annealing. Through supermolecular cation-pi interaction between the small organic molecules of the conjugated pi system and cations in the perovskite, the defect of the perovskite film can begreatly reduced and the stability is significantly improved. Furthermore, the invention further provides the corresponding photoelectric devices, such as a perovskite cell, a light-emitting diode anda photoelectric detector, prepared by using the preparation method of the perovskite film. Compared with a standard device to which the small organic molecules of the conjugated pi system are not added, the obtained photoelectric devices have the advantages that the performance and the stability are improved.

The invention discloses a conjugated ligand-based perovskite quantum dot, and a preparation method and an application thereof. The perovskite quantum dot comprises an organic conjugated ligand and a perovskite quantum dot main body from outside to inside; the molecule of the organic conjugated ligand is an organic amine molecule having an all-conjugated structure; and the composition of the perovskite quantum dot is ABX3. Electrons in the organic all-conjugated molecule have delocalization characteristics, and the mobility of the electrons in the conjugated system is significantly higher than the mobility of the electron only existing in covalent single-bonded long chain molecules, so the mobility of carriers in a whole perovskite quantum dot luminescence layer is improved, and the improvement of the luminous efficiency is promoted.

The invention relates to an organic electroluminescent material and a preparation method thereof, and solves the technical problem that the luminous efficiency of the conventional luminescent material cannot meet requirements of an OLED (Organic Light Emitting Diode). The organic electroluminescent material is a novel material which is synthesized by introducing C14-C20 condensed ring aryl group, triarylated amine or N-phenyl-3-carbazolyl based on 7H-benzacridine. Compared with 7H-benzacridine, the synthesized green organic electroluminescent material has a bigger plane structure and a conjugated system, and can change electron transition energy level, thereby changing luminescent spectrum and obviously improving luminous efficiency. The preparation method of the organic electroluminescent material is simple in synthesis and purification, low in cost, and can meet requirements of industrial development.

The invention provides a phenanthro-carbazole donor-acceptor organic dye and application thereof in a dye-sensitized solar cell, and belongs to the field of organic dyes. The organic dye utilizes the characteristics of phenanthro-carbazole structural units such as a large plane conjugated system and higher fluorescence quantum yield to be connected with the structural units with different electronic withdrawing abilities so as to realize step-by-step regulation and control to the dye molecular energy level; meanwhile, a molecular non-conjugated skeleton is connected with a long alkyl chain, so that the solubility of phenanthro-carbazole units is improved, the difficulty in molecular synthesis and device processing is reduced, and charge transfer among molecules caused by molecular aggregation is reduced; meanwhile, raw materials of phenanthro-carbazole compounds are abundant in source, low in price and easy to cut structurally.

The present invention discloses phosphorescence iridium complex and an organic electroluminescent apparatus thereof. The phosphorescence iridium complex of the present invention is that 1-phenyl phthalizine derivative is used as a ligand for the complexation of iridium metal ion, the structure of which is as a formula (I). The phosphorescence iridium complex of the present invention contains 1-phenyl phthalizine group, which not only can adjust the size of the conjugated system of the ligand to obtain the satisfying energy transmission efficiency, luminescent light wave and luminescence life, but also can produce certain space effect, so as to reduce the direction effect among complex luminescent centers, reduce the self quenching phenomenon of triple-state exciton and improve the luminescent performance of material. At the same time, the complex has high synthesis yield, easy purification, good solubility and high stability, is in favor of vapor plating and can increase the film-forming performance and improve the stability of the apparatus. The electroluminescent apparatus which is manufactured by the phosphorescence iridium complex has very high internal and external quanta yield, luminescent brightness and stability.