4 results about "Molecular chemistry" patented technology

The application discloses a plastic-based embossing machine magnetic positioning plate and a preparation method thereof, relates to the technical field of protective materials, and the raw material of the plastic-based embossing machine magnetic positioning plate comprises modified PA, modified PS, inorganic magnetic powder filler and other additives; the preparation method comprises the following steps: 1) blending and granulating; 2) injection molding; and 3) multi-pole magnetization process. The application is designed from the perspective of molecular chemistry, and through chemical reactions such as end capping, grafting and in-situ compatibilization, the core contradiction of poor interface combination of multi-component and multi-phase composite materials in the preparation process of the existing positioning plate is fundamentally solved, so that the mechanical properties, environmental stability and functional reliability of the material are synergistically improved, and finally, an innovative product meeting the requirements of extremely harsh industrial applications is successfully prepared.

This invention discloses a method and application for detecting diazepam based on ratio Raman signals, belonging to the field of food safety and chemical detection technology. The method involves mixing an Au@4-NTP@Ag@ZIF-8 composite material solution with the sample solution to be tested, then dropping the mixture onto a substrate. A Raman spectrometer is used to acquire spectral data at an excitation wavelength of 532 nm, and the intensity ratio I is calculated. 1590 / I 1107 Substitute diazepam concentration to intensity ratio I 1590 / I 1107 The concentration of diazepam in the sample was calculated using a standard curve. The detection method of this invention exhibits high selectivity for diazepam and is unaffected by interference from macromolecules such as proteins, lipids, and glucose, as well as small molecule chemicals in complex matrices. It enables trace, rapid, and accurate detection of diazepam residues in aquatic products, and has significant application prospects in practical scenarios such as port clearance and on-site law enforcement.

The invention discloses a molecular chemistry and binding property prediction method based on Laplace-Beltrami multi-head attention spectrum analysis. The method comprises the following steps: S1, performing triangulation on a molecular surface and removing an abnormal triangle; s2, a Laplace-Beltrami characteristic value is solved for the molecular surface after triangulation by using a finite element method, and a maximum characteristic value threshold parameter is set; s3, extracting geometric features and chemical features of the molecular surface and splicing the geometric features and the chemical features into a fusion feature matrix; and S4, completing propagation update in the spectral domain by using a conversion mechanism of the Laplace-Beltrami operator in the spatial domain and the spectral domain, and adjusting the maximum characteristic value threshold to optimize a prediction result.

Provided is a Raman-active nanoparticle including: a spherical plasmonic metal core; a plasmonic metal shell having surface irregularities; and a self-assembled monolayer which binds to each of the core and the shell, is positioned between the core and the shell, and includes a Raman reporter satisfying the following Chemical Formula 1:NO2—Ar—SH  (Chemical Formula 1)wherein Ar is a (C6-C12) arylene group.