Synthesis and Characterization of Fluorescent Brightening Agents with Chiral 2(5H)-Furanone and Bis-1,2,3-triazole Structure

Abstract

The multifunctional fluorescent brightening agents (FBAs) simultaneously possessing chiral 2(5H)-furanone and bis-1,2,3-triazole moieties are synthesized as designed via the Click reaction of N-[(5S)-5-menthoxy-2(5H)-furanonyl] amino acid propargyl esters with 4,4′-diazidostilbene-2,2′-disulfonate sodium salt tetrahydrate in high yields (over 90%). Their structures are systematically characterized. In addition, the testing results of their properties from fluorescence spectroscopy, photoisomerization, and ultraviolet (UV) protection factor (UPF) test show that the novel FBAs have excellent fastness to acid and light, as well as UV resistance. Especially, when a larger alkyl group in the side chain of amino acid moiety is introduced into the structure of the FBA, the designed compound has a better fluorescent brightening effect as anticipated. Moreover, in the experiments of its sorption on paper fibers, the scanning electron microscopy (SEM) images with it show a rough surface, while others without it show a relatively smooth surface.

Structural, optical and antibacterial properties of yttriumdoped ZnO nanoparticles

“…The E g values for direct and indirect transition obtained by the plots of (αhv) 2 Vs photon energy (hv) and are shown in Fig 5. [18,19]. Zone of inhibition observed against pathogenic bacteria suggests that ZnO nanoparticles exhibit excellent [20][21][22].…”

A mini review of the synthesis of poly-1,2,3-triazole-based functional materials

“…4 A wide spectrum of potential applications was also expected for poly-1,2,3-triazole-based functional materials, such as supermolecules, uorescence probes, and biological proteins. 5 Comparing to conventional 1,2,3-triazoles-based organic functional molecules, 6 poly-1,2,3-triazole-based functional materials have shown more widespread applications (owing to their superior properties), including DNA chemistry, self-assembly, surface modication, supramolecular chemistry, combination chemistry, and dendrimer chemistry, as well as functional macromolecules and biomedical applications. 7 In this mini review, the synthesis of poly-1,2,3-triazole-based functional materials in most recent years (mostly 2016) are systematically summarized in terms of different synthetic processes and raw material classication.…”

Comparison of UV protection properties of cotton fabrics treated with aqueous and methanolic extracts of Solanum nigrum and Amaranthus viridis plants

“…For the applications where fabric whiteness is not a major concern, high concentrations of extracts can be used but for the applications where fabric whiteness is sensitive issue maintenance of concentration at an optimum level is vital. However, in order to achieve an optimum level of both, ultraviolet protection and whiteness, fluorescent brightening agents or OBAs can be introduced into the extract dispersions.…”