Preparation of 1, 3, 6, 8-Pyrenesulfonic Acid Tetrasodium Salt Dye-Doped Silica Nanoparticles and Their Application in Water-Based Anti-Counterfeit Ink

Abstract

In order to improve the luminescent stability of water-based anti-counterfeit ink, a new fluorescent material is prepared by doping dye into silica nanoparticles. Water soluble anionic dye 1, 3, 6, 8-pyrenesulfonic acid sodium salt (PTSA) is selected as the dopant. In this work, PTSA is successfully trapped into silica nanoparticles (SiNPs) by the reverse microemulsion method using cationic polyelectrolyte poly (dimethyl diallyl ammonium chloride; PDADMAC) as a bridge. The UV absorption spectra, fluorescence emission spectra and fluorescent decay curves are used to describe the luminescent properties of the PTSA-doped silica nanoparticles (PTSA-SiNPs). In addition, the as-prepared PTSA-SiNPs and polyurethane waterborne emulsion are used to prepare water-based anti-counterfeit ink, and fluorescent patterns are successfully printed through screen-printing. The samples printed by the ink exhibit desirable fluorescence properties, heat stability, robust photostability, and a fluorescent anti-counterfeit effect, which makes the PTSA-SiNPs promising luminescent materials for anti-counterfeit applications.

Perpendicular Alignment of Covalent Organic Framework (COF) Pore Channels by Solvent Vapor Annealing

“…High-precision separation for Na 4 PTS and Na 2 SO 4 is of significance for the real-world manufacturing process. During the synthesis of Na 4 PTS, which is an extensively used fluorescent material, excess H 2 SO 4 is usually served as the sulfonating agent to enhance the efficiency. , However, after the reaction, the separation between Na 4 PTS and H 2 SO 4 with common strategies remains challenging. Precise separation offered by the perpendicularly aligned TbHz membranes is expected to improve the yield and purity of Na 4 PTS.…”

Biomimetic Synthesis of Organic Molecular‐Doped Fluorescent Guanine Crystals with Pearlescence

“…Incorporating fluorescent substances into the host materials is an effective strategy to increase the fluorescence intensity of materials [29,40,42,45,65–69] . Meanwhile, the chemical stability and photostability of the fluorescent substances incorporated in host materials can be improved as the host material isolates the fluorescent substances from the environment [33,41,44,68] .…”

“…Incorporating fluorescent substances into the host materials is an effective strategy to increase the fluorescence intensity of materials. [29,40,42,45,[65][66][67][68][69] Meanwhile, the chemical stability and photostability of the fluorescent substances incorporated in host materials can be improved as the host material isolates the fluorescent substances from the environment. [33,41,44,68] It is worth noting that while the doping strategy is widely used in the field of inorganic crystals, [28,29,31] the preparation of multifunctional materials by incorporating other substances into organic crystals has rarely been involved.…”

“…CaCO 3 crystals doped with fluorescent substances such as Eu 3+[29] and quantum dots [42] exhibit enhanced fluorescent properties and prolonged fluorescence lifetime. Silica nanoparticles doped with cyanine and 1, 3, 6, 8‐pyrenesulfonic acid sodium salt (PTSA) exhibit enhanced chemical‐ and fluorescent photo‐stability [44,45] . Thus, preparing fluorescent guanine crystals by doping may be an appropriate method.…”

“…Silica nanoparticles doped with cyanine and 1, 3, 6, 8pyrenesulfonic acid sodium salt (PTSA) exhibit enhanced chemical-and fluorescent photo-stability. [44,45] Thus, preparing fluorescent guanine crystals by doping may be an appropriate method.…”