6results about How to "Achieving selective recognition" patented technology

The invention relates to the technical field of formaldehyde adsorption, in particular to a preparation method of modified activated carbon for removing formaldehyde, which comprises the following steps: S1, performing acidification pretreatment on coconut shell charcoal, and grafting the pretreated coconut shell charcoal with polyethyleneimine to obtain activated carbon loaded with polyethyleneimine; s2, carrying out dipping treatment and cyclohexanol treatment on the activated carbon loaded with polyethyleneimine to obtain functionalized activated carbon; s3, reacting the magnesium-aluminum hydrotalcite with a quaternary ammonium salt solution and a sodium benzenesulfonate solution to obtain modified hydrotalcite; reacting the modified hydrotalcite with a vinyl silane coupling agent to obtain vinyl hydrotalcite; s4, the vinyl hydrotalcite and 4-amino-3-hydrazino-5-sulfydryl-triazole are subjected to a reaction, and secondary modified hydrotalcite is obtained; and S5, dispersing the secondary modified hydrotalcite and the functionalized activated carbon in water, and adding glutaraldehyde to obtain the modified activated carbon. The modified activated carbon prepared by the preparation method disclosed by the invention realizes selective recognition, efficient adsorption and catalytic degradation of formaldehyde.

The invention discloses a tyrosine enantiomer sensor and an identification method thereof based on the aggregation-induced electrochemiluminescence effect of chiral pyrene tetracarboxylic acid, and belongs to the field of electrochemiluminescence technology. With 3,4,9,10-pyrene tetracarboxylic acid as the main material, S-3-amino-1-butanol as the chiral ligand, chirality transfer is achieved through an amidation reaction, and under the action of dodecyl ammonium bromide, chloroform and cyclohexane, the monomers are aggregated in micelles through intermolecular π-π stacking interactions, which restricts intramolecular motion, thereby triggering the aggregation-induced electrochemiluminescence effect, and obtaining a pyrene tetracarboxylic acid-S-3-amino-1-butanol assembly, potassium persulfate as a co-reaction reagent, when tyrosine enantiomers are present in the system, electrochemiluminescence signals of different intensities are presented, and a sensing method based on a new electrochemiluminescence system of a pyrene tetracarboxylic acid-S-3-amino-1-butanol assembly is constructed accordingly, and stable identification of tyrosine enantiomers is achieved.

The invention discloses an m-benzene bridged alkynyl pyrazole pyridine derivative as well as a preparation method and application thereof, and belongs to the technical field of pyrazole pyridine derivatives. The preparation method of the m-benzene bridged alkynyl pyrazole pyridine derivative comprises the following steps: dissolving pyrazole halide, an ethynyl aromatic compound and a catalyst in a solvent, carrying out heating reflux in an N2 atmosphere, and carrying out filtering, spin-drying and chromatographic evaporation to obtain a solid product; and adding the solid product into a mixed solvent prepared from methanol and dichloromethane according to a volume ratio of 1: 1, adding HCl into the mixed solvent to remove a protecting group, adding NaHCO3 to adjust the pH value of the mixed solvent to 7, filtering to obtain a solid, and washing, filtering and vacuum drying the solid to obtain the derivative. By adopting the m-benzene bridged alkynyl pyrazole pyridine derivative as well as the preparation method and the application thereof, the problems that a single pyridine pyrazole ligand adopted in the prior art is simple in coordination form and an obtained complex is single in structure and function can be solved.

The present invention relates to a highly selective fluorescent probe for identifying hypobromous acid. Specifically, the probe of the present invention can be used to measure, detect or screen hypobromous acid, can realize selective recognition of hypobromous acid, can realize rapid and highly sensitive analysis of hypobromous acid, and can also realize detection of hypobromous acid in real water samples, and has the advantages of simple synthesis, stable properties, and is conducive to commercial application.

The embodiment of the specification provides an aromatic molecule imprinting electrochemical sensor array, an aromatic molecule detection device, an electronic nose system and application thereof in detection of dangerous solid waste aromatic molecules. A composite film gas sensor array modified by a molecular imprinting polymer and a semiconductor material is used as a detection device, and imprinting cavities capable of selectively adsorbing aromatic molecules exist in the surface film of the device. When different target molecules reach the surface of the molecular imprinting material, the response values of the sensors composed of different materials to the target gas are different, so that the conductive properties of the semiconductor material are changed, and the resistance of the sensor is changed differently. Compared with the current aromatic molecule detection method which is complex to prepare and needs high-temperature conditions, the gas sensor array prepared by the application is small in size, low in manufacturing cost, simple and efficient in detection method and wide in detection range, is a new high-selectivity detection method and has a wide application prospect.

The present invention belongs to the technical field of electrochemiluminescence, and specifically discloses a method for identifying tyrosine enantiomers based on porphyrin MOF materials to enhance the electrochemiluminescence effect. Tetrakis(4-carboxyphenyl)porphyrin and metal ion zinc are prepared into a MOF structure, and chiral binaphthol is introduced to achieve chiral transfer, and the morphology of the material is regulated by a surfactant-assisted self-assembly method to obtain a nanoscale product tetrakis(4-carboxyphenyl)porphyrin-S-binaphthol-zinc assembly, which is modified on the electrode surface, enhances the electrochemiluminescence signal of L-tyrosine, and does not change the electrochemiluminescence signal of D-tyrosine, and realizes the identification of tyrosine enantiomers based on electrochemiluminescence.