8results about How to "Strong fluorescence" patented technology

This invention discloses indole-fused hydrogenated morpholino compounds, their preparation methods, and applications, belonging to the technical fields of fluorescent materials and antitumor compounds. Using enamine ketones and amines as reaction substrates, a series of indole-fused hydrogenated morpholino compounds with different substituents were synthesized in highly polar solvents via the Stork enamine reaction and intramolecular acylation reaction. These compounds exhibit fluorescence wavelengths in the range of 430-700 nm and show certain inhibitory activity against lung cancer A549, breast cancer MDA-MB-231, colon cancer HCT116, liver cancer HepG2, and prostate cancer DU145, providing more options for the preparation of tumor drugs.

The invention provides a preparation method of a phenylboronic acid functionalized silicon quantum dot fluorescent probe and application of the phenylboronic acid functionalized silicon quantum dot fluorescent probe in detection of mercury ions and methyl mercury ions, and relates to the technical field of detection of heavy metal mercury ions and methyl mercury ions. In the presence of mercury ions (Hg < 2 + >) and methyl mercury ions (CH3Hg < + >), silicon point fluorescence is quenched. By combining ultraviolet portable equipment and combining a silicon puncture-Hg < 2 + > and silicon puncture-CH3Hg < + > system with RGB value acquisition and conversion of a smart phone platform, rapid and high-sensitivity detection of mercury ions and methyl mercury ions in an environmental water body is realized. The detection method disclosed by the invention has the advantages of simplicity and convenience in operation, rapid feedback, high sensitivity, good repeatability, high stability, strong accuracy and the like, can intuitively realize rapid determination of mercury ions and methyl mercury ions in a water sample in real time, and widens the application direction of silicon dots in the aspect of environmental detection.

This invention provides a siloxane ligand-protected Ag 40 Nanoclusters, their synthesis methods, and applications. This invention relates to Ag protected by siloxane ligands. 40 Nanoclusters are composed of RC≡C ‑ and (Ph 4 Si 4 O 8 ) 4‑ Ag protected by both ligands 40 Nanoclusters, with the molecular formula {Ag} 40 [(RC≡C) 8 (Ph 4 Si 4 O 8 ) 6 The silver nanoclusters synthesized in this invention have precise atoms and novel structures; the synthesis method is simple, easy to operate, mild under mild conditions, and the raw materials are readily available, making it potential for industrial and commercial production; the obtained silver nanoclusters exhibit superior fluorescence performance at low temperatures and have a long fluorescence lifetime, making them practically valuable in the field of fluorescent probes and worthy of market promotion.

The application discloses a preparation method of carbon quantum dots based on biochar, and comprises the following steps: step S1, plant-based biochar is put into water for ultrasonic cleaning to remove impurities and incompletely carbonized plant residues; step S2, the biochar in step S1 is added into a hydrogen peroxide solution with a concentration of 20-40%, and after stirring, a black suspension is formed; step S3, the suspension is subjected to ultrasonic treatment, and then the suspension is vacuum filtered by using a 0.22 mu m mixed cellulose ester membrane to remove non-fluorescent precipitates, and then dialysis is performed, so that a biochar carbon quantum dot solution is prepared. The carbon quantum dots are prepared by using an ultrasonic method in one step, no subsequent chemical reagent is added, and the prepared carbon quantum dots have good fluorescence performance.

This invention relates to the field of harmless treatment technology for oily sludge, specifically to a method for preparing carbon quantum dots from oily sludge. Conventional methods for preparing carbon quantum dots from oily sludge have limitations in yield and fluorescence intensity. To address these issues, this invention provides a method for preparing carbon quantum dots from oily sludge. Considering the complex composition of oily sludge, this invention designs a multi-stage purification process chain of "ultrasonic extraction—water washing—Soxhlet extraction—acidification treatment." Each step works synergistically, purifying the sludge step by step to ultimately obtain a high-purity refined organic carbon source. The refined organic carbon source removes impurities through gentle solvent extraction and acid washing, maximizing the preservation of the organic carbon source's chemical activity and structural integrity. In the hydrothermal reaction, it can be effectively converted into carbon quantum dots, avoiding carbon source loss or activity reduction due to over-processing, thus further improving the yield and fluorescence intensity of carbon quantum dots.

This invention discloses a difluorobenzothiadiazole-based panchromatic fluorescent molecule and its preparation and application. The structural formula of this difluorobenzothiadiazole-based fluorescent molecule is shown in formula (1): In formula (1), R is independently selected from silyl, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, and substituted or unsubstituted heteroaryl. The difluorobenzothiadiazole-based fluorescent molecule provided by this invention has a novel structure and is a compound with higher fluorescence intensity, quantum yield, and longer lifetime. It can achieve fluorescence emission across the entire visible range from blue to red in liquid, solid, and thin film states.

This invention belongs to the field of fluorescent and antibacterial carbon nanomaterials technology, specifically relating to a method for preparing and applying fluorescent carbon quantum dots using apigenin as the carbon source. Apigenin powder is dispersed in a 0.01-1M KOH solution via ultrasonic dispersion, then transferred to a high-pressure reactor for hydrothermal reaction. After heating, the mixture is naturally cooled to room temperature. The reaction product is then filtered and freeze-dried to obtain apigenin carbon quantum dot powder. The obtained apigenin carbon quantum dots exhibit antibacterial properties against Staphylococcus aureus and Escherichia coli under ultraviolet light irradiation. This invention offers a low-cost and simple method, producing carbon quantum dots with strong luminescence, good water solubility, stable luminescence at alkaline pH, and highly efficient photodynamic antibacterial properties, showing broad application prospects in the biological field.

The present application provides a preparation method of a cellulose-based fluorescent material. The method comprises: esterifying propynoic acid with cellulose to obtain fluorescent cellulose propynoate, and then performing cross-linking reaction with a polyhydroxy compound to prepare cross-linked fluorescent cellulose; or esterifying propynoic acid with a polyhydroxy compound to obtain fluorescent polyhydroxy propynoate, and then performing cross-linking with cellulose to prepare cross-linked fluorescent cellulose. The reaction process is green and efficient, and the cellulose-based fluorescent material with stable fluorescent properties can be realized without additional addition of a fluorescent agent; the cellulose-based fluorescent material can be used in the fields of composite materials, optics, anti-counterfeiting and the like.