83results about How to "Achieving selective recognition" patented technology

The invention relates to the technical field of quick detection of soil nutrient and discloses a sensor array for quickly detecting soil nitrate nitrogen. The sensor array comprises a silver-silver chloride reference electrode and multiple polypyrrole polymer sensitive film sensors; the reference electrode and the multiple sensors are arranged in parallel; and each sensor comprises a substrate and a polypyrrole polymer film which is located on the substrate and is doped with nitrate radical. The invention also provides a method for detecting nitrate nitrogen content by utilizing the sensor array. According to the invention, the problems such as undesirable selectivity and the like in the conventional polyvinyl chloride ion selective electrode for the soil nitrate nitrogen detection sensor can be solved.

The invention relates to a high-sensitivity high-selectivity fluorescence probe capable of real-time responding hypochlorous acid and application of the high-sensitivity high-selectivity fluorescence probe. The fluorescence probe is a kind of 2-benzothiazoline phenol compounds specifically and can be used as the fluorescence probe to be used for detection of hypochlorous acid / hypochlorite. By utilizing the fluorescence probe, at least one of the technical effects can be realized, for example, hypochlorous acid / hypochlorite can be identified with high sensitivity and high selectivity, response to hypochlorous acid / hypochlorite can be realized instantly, real-time detection to hypochlorous acid / hypochlorite can be realized, the fluorescence probe is stable in character and can be stored and used for long term, detection to hypochlorous acid / hypochlorite is easy under the condition of physiological level, and the fluorescence probe has strong antijamming capability.

The invention relates to high-selectivity hydrazine ratiometric fluorescent probes and preparation methods thereof. The probes are not only high in selectivity in hydrazine recognition but also flexible in hydrazine qualitative and qualitative analysis carried out according to a fluorescence method. The probes are capable of quickly responding to hydrazine to realize real-time hydrazine detection and are available for long-term storage and use due to property stability. In addition, the probes are capable of realizing accurate qualitative analysis on hydrazine according to a ratiometric fluorescence method and have excellent anti-interference performances. Synthesis conditions of the probes are mild relatively, and the probes can be synthesized simply only by one-step reaction.

The present invention discloses an amphiphilicity guanosine derivative, a preparation method therefor and an application thereof in cytidine triphosphate sensing and recognition. The amphiphilicity guanosine derivative takes a hexadecyl chain as a tail group and a guanosine derivative as a head group, and has the features of biocompatibility and nontoxicity; the amphiphilicity guanosine derivative can be assembled with an amphiphilicity Tb (III) complex to form a vesicle type nano interface; characteristic fluorescence of the Tb (III) complex is greatly sensitized by an energy transfer process between a guanosine construction unit assembled on the interface and the Tb (III) complex; and when cytidine triphosphate which can be in complementary pairing with guanosine is added in the system, the energy transfer process between the guanosine derivative and the Tb (III) complex can be blocked drastically, thereby quenching the characteristic fluorescence of the Tb (III) complex and achieving selective recognition for the cytidine triphosphate. The amphiphilicity guanosine derivative provided by the present invention is simple in preparation method and mild in reaction condition, and can be used for cytidine triphosphate detection.

The invention relates to a ratio fluorescence probe capable of quickly and highly selectively analyzing hydrazine. Particularly, the probe is a naphthalimide type compound taking 4-bromobutyric acid ester as a recognition receptor and can be applied to hydrazine detection by serving as a hydrazine fluorescence probe. The probe can achieve at least one of the following technical advantages of highly selectively recognizing hydrazine, being capable of quickly responding to hydrazine and achieving instant detection on hydrazine, stable in performance, capable of being stored and used for a long term and beneficial for detecting hydrazine in actual samples and achieving the high anti-jamming capability.

The invention discloses an ultra-microporous ionic polymer material based on hyperbranched ionic liquid and preparation and alkyne / olefin separation application thereof. The ultra-microporous ionic polymer material has the characteristics of high anion density and narrow pore size distribution, and the structural properties are regulated and controlled by changing a hyperbranched structure and anion and cation types. High-selectivity separation of acetylene and propyne is realized by utilizing a strong hydrogen bond environment constructed by high anion density and a size screening effect, sothat alkyne in alkyne and olefin mixed gas is removed to a very low degree, and olefin gas with extremely low alkyne content is obtained. The material prepared by the method has the advantages of highstability, simple preparation, strong controllability of material structural properties, good adsorption performance, easy desorption, greenness, environmental protection, and good industrial application prospect.

The invention relates to a fluorescent probe preparation method. Specifically, the probe disclosed by the invention is benzothiazole-rhodamine compound and can serve as a nitrite peroxide ratio fluorescent probe to be applied to nitrite peroxide detection. The preparation method disclosed by the invention utilizes a one-step synthesizing method, so that the preparation method has the advantages ofsimpleness in preparation and high yield.

The invention discloses a method for rapidly detecting fluorinions in an environment, and belongs to the technical field of analytical chemistry. The method comprises the following steps: mixing a sample to be detected with a colorimetric probe in an organic solvent; measuring the ultraviolet absorption spectrum at 350-600 nm and the fluorescence emission spectrum at 400-680 nm; and calculating the concentration of the fluorinions in the sample to be detected according to the measured ultraviolet absorption intensity at 450 nm and the measured fluorescence emission intensity at 555 nm. The method can highly selectively identify the fluorinions, and also can quantitatively and qualitatively analyze the fluorinions in a naked eye observation manner. The method achieves fast effective response to the fluorinions and real-time detection of the fluorinions.

The invention relates to highly selective ultra-sensitive colorimetric fluorescent probes for detecting copper ions. In particular, the probes are a class of rhodamine-type compounds which can be used as copper ion colorimetric fluorescent probes for detection of copper ions. The probes can achieve at least one of the following technical effects: high selectivity to identify copper ions, rapid response to copper ions, high sensitivity analysis of copper ions, performance stability, long-term storage and use and strong anti-interference ability.