Fluorescent paper-based polarity sensor as well as preparation method and application thereof

• Main Authors: WANG SHIBO, YANG MEI, SONG TIANQUN, LIN XIN, XU YIXIN, SUN JINGYI, LENG HAN, HAN QI, GAO WANTING
• Format: Patent
• Language: Chinese; English
• Published: 27.10.2023
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention belongs to the technical field of fluorescent materials, and discloses a fluorescent paper-based polarity sensor as well as a preparation method and application thereof. P-phenylenediamine and phenanthroline are used as precursors, and the nitrogen-doped red light carbon dots sensitive to solvent polarity are prepared through a one-step solvothermal method. The N-RCDs are fixed on general qualitative filter paper through a soaking method to prepare the polar test paper. And extracting the color of the test paper dropwise added with different polar solvents under 365nm hand electro-optical irradiation by using a mobile phone'color acquisition 'app to prepare the colorimetric card. The color of the test paper photo is converted into RGB data, and a linear relation curve of the R/G value and the water content in the organic solvent is made. The paper-based polarity sensor is simple to process, low in cost, convenient to operate, convenient to carry, high in solvent polarity response selectivity, wi