Spectral characterization of selected stilbentriazine dyes – Structural trans–cis isomerisation

Hanyż, I.; Ion, Rodica‐Mariana; Nuta, Alexandrina; Wróbel, Danuta

doi:10.1016/j.molstruc.2008.01.054

Cited by 2 publications

(3 citation statements)

References 18 publications

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“…Because photoisomerization is a very common phenomenon for stilbene-type compounds, it closely influences the light stability or light fastness of the FBAs. So, according to the literature, , UV–visible (UV-vis) absorption spectra at different irradiation time are employed to monitor the process of photoisomerization of compounds 6a and 6b (see Scheme ). After the solutions of compounds 6a and 6b have been irradiated, their spectra in different moments are recorded as Figures and , respectively.…”

Section: Resultsmentioning

confidence: 99%

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

Huo

Luo

et al. 2013

Ind. Eng. Chem. Res.

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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.

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Section: Resultsmentioning

confidence: 99%

“…In the literature, the maximum absorption peak of the transform of many stilbene sulfonate FBAs is often significantly decreased after 15−20 min, 40 even shorter. 39 To our delight, the stilbene sulfonate FBAs 6a-6b synthesized in this research can make the time delayed over 30 min.…”

Section: Introductionmentioning

confidence: 99%

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

Huo

Luo

et al. 2013

Ind. Eng. Chem. Res.

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“…FTIR spectra of BHA and L-PC were compared with FTIR data of other triazine-stilbene OBs published in literature related to the synthesis and the structural analysis of OBs derivatives of DSD acid-triazine. FTIR spectra of these OBs showed two peaks corresponding to triazine-ring skeleton vibrations [ 29 , 30 , 31 , 32 ]. In the case of BHA these peaks were at 1418 and 1500 cm −1 and in the case of L-PC at 1390 and 1490 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

Respirometric Study of Optical Brighteners in Textile Wastewater

et al. 2019

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Optical brighteners (OBs) are colorless fluorescent dyes, widely used in industry to improve whiteness in materials. Nearly 80% of all OBs in the market are derivatives of stilbene. They absorb the near-ultraviolet light and re-emit most of it in the blue range as visible fluorescence. OBs are commonly applied on textiles, detergents, paper and plastic products, among others. OBs have a low degradation ratio. In biological plants, they can only be partially removed by adsorption into the sludge and a tertiary treatment could be required to fully remove them. Part of them may persist and can be found in river and lake waters. The current work aims to evaluate the effect of the OBs in the bacterial activity of biological wastewater treatment plants. The influence of two commercial OBs (Goldblanc BHA and Leucophor PC) on respiration rate was monitored by means of a semi-continuous electrolytic respirometer, in order to obtain information related to the growth of the biomass and the degradation of the substrate. Their acute toxicity was also determined. It was concluded that the OB effect on bacteria population is variable depending on its chemical structure. Unlike the former, the Leucophor-PC brightener had an impact on the respirometric rate.

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Spectral characterization of selected stilbentriazine dyes – Structural trans–cis isomerisation

Cited by 2 publications

References 18 publications

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

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

Respirometric Study of Optical Brighteners in Textile Wastewater

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