Forensic Chemistry
·
2024
·
IF 2.6
Boyan Li,Qiongyao Ning,Wenyou Ye,Qianxi Wang,Haili Yu,Xuecheng Chen,Yi He
Colorimetric assays are inexpensive and attractive tools for the detection of fentanyl (FTN), yet further enhancing their sensitivity remains a major challenge. Herein, we develop a halogen-bond mediated visual competitive colorimetric assay for FTN using Erythrosine B (EB) as a probe. The addition of poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide (F-127) induces the EB aggregation, strongly suppressing the background signal. Upon the introduction of FTN, the subsequent competitive reaction displaces F-127 to generate EB-FTN charge-transfer complexes via N … I halogen bonds between electron-rich amine groups and electron-deficient iodine sites, accompanying a significant absorbance wavelength shift and pink-to-purple color change. The limits of detection of this approach for FTN are 2 mg·L −1 by the naked eye and 0.19 mg·L −1 by UV–vis spectroscopy, which are approximately 3.7-fold to 4 orders of magnitude more sensitive than the reported colorimetric assays. Meanwhile, the present method is well applied for FTN-spiked domestic sewage samples, and an easy-to-use smartphone-based digital image colorimetry is also fabricated. It is expected that such an assay can play a key role in alleviating the worldwide opioid overdose crisis.
研究领域:
分析化学
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药物检测
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环境科学
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DOI
高影响因子
FIBERS AND POLYMERS
·
2017
·Vol. 18
·期 9
·1644-1651
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IF 1.113
Nan Xuying,Huang Yi,Fan Qinguo,Shao Jianzhong,Yao Yuhua
A series of erythrosine B derivatives with a linked coinitiator on different position, combined with iodonium salt and/or tertiary amine were used to initiate free radical/cationic photopolymerization. Their photoinitiating ability and photobleaching behaviors were investigated and compared with those of the systems containing separated counterparts. The polymerization results showed that compared to the systems containing separated counterparts, the systems containing derivatives with a linked coinitiator on carboxyl group exhibited higher photoinitiating ability in radical photopolymerization, but had poorer one in cationic polymerization. Simultaneously, in free radical/cationic polymerizations, these linked derivatives could be photobleached more efficiently than the separated one, due to fast intramolecular reaction, which was especially significant for the industrial application. Besides, it was found that the investigated systems were photobleached more efficiently in cationic photopolymerization than in radical one. These results will provide useful information for designing effective photoinitiators for different polymerization.
研究领域:
高分子科学
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光化学
·
材料科学
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DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Yaxin Yu,Fei Xia,Qi Cao,Hanyuan Zhang,Wanting Shi,Peng Zhang,Wenxiu Sun
The adoption of innovative active food packaging has become increasingly crucial for suppressing microbial proliferation and prolonging the shelf life of food items. In this research, we detail the development of novel photodynamic antimicrobial nanofiber films via the electrospinning method, employing polyvinyl alcohol (PVA) as the base material and erythrosine B (EB) as the photosensitizing agent. We examined the chemical composition, photophysical characteristics, and antibacterial properties of these films. FTIR spectroscopy validated the integration of EB within the nanofiber structures. Furthermore, EB enhanced the films' resistance to water, lowered water vapor permeability, and displayed moderate mechanical strength. The nanofiber films exhibited a remarkable capability for generating reactive oxygen species and showed significant antibacterial effectiveness against E. coli , S. aureus , P. putida , and P. aeruginosa , maintaining an overall migration limit of EB within the acceptable threshold of 10 mg/dm 2 . We utilized PVA/EB-G films along with tray packaging to preserve chilled horsemeat, assessing physicochemical alterations and microbial populations. The storage life of chilled horsemeat was prolonged by 6 days in comparison to controls that did not include PVA/EB-G films. The results of this investigation propose a novel strategy for harnessing photodynamic mechanisms in the preservation of chilled meat.
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PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 31
·
IF 1.768
Xuying Nan,Yi Huang,Qinguo Fan,Jianzhong Shao
A novel erythrosine B derivative linked with a tertiary amine used as a visible light initiator for free radical polymerization was synthesized and characterized. For comparison, the free hydrophobic erythrosine B derivative was also synthesized and its combination with the tertiary amine was used as the separated two component photoinitiator. The linked initiator exhibited higher photoinitiator efficiency in high viscosity monomer than in low viscosity one, compared with the separated counterpart. Especially, when it was combined with iodonium salt, the further promotion of the photoinitiator efficiency was observed, compared with the separated three component system. It was found that as iodonium salt together with tertiary amine was continuously added to the formula with the linked initiator, the photoinitiator efficiency was dramatically enhanced compared with the same addition to the formula with the separated counterpart, revealing the application potential of the linked initiator. And the continuous addition of either the iodium salt or the tertiary amine to the formula only leaded to the small size increase of the photoinitiator efficiency. These results suggested that there existed an interdependent relationship between iodonium salt and tertiary amine in promoting the photoinitiator efficiency of the dye/amine/iodonium salt system. For these, the corresponding synergistic mechanism was proposed. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42361.
研究领域:
高分子化学
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光聚合
·
材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Qingfeng Dong,Ruojian Gao,Xiaofang Liu,Li Li
In this study, photobactericidal films exhibiting excellent antibacterial activity upon irradiation under green light (530–545 nm) were prepared by incorporating erythrosine B (EB) into ethyl cellulose (EC) film. The results of Fourier-transform infrared spectra illustrated that the EB was successfully encapsulated in the films. Additionally, the EC/EB films exhibited a semi-transparent magenta hue with some UV blocking properties. As the amount of EB added to the EC films increased the tensile strength decreased from 22.79 MPa to 9.09 MPa, and the elongation at break increased from 8.20 % to 30.80 %. Under green light irradiation, the EC/EB films showed strong antibacterial activity (> 99 % bacteriostasis rate for Staphylococcus aureus and Escherichia coli ). Research on antibacterial mechanisms implied that the reactive oxygen species generated via photochemical pathways, caused damage to the bacterial cell membrane, leading to the leakage of substances within the bacterial cells and ultimately resulting in the death of the bacteria. Finally, the EC/EB films were applied to the preservation of salmon fillets, and the results showed the EC/EB films could significantly inhibit the growth of spoilage bacteria, thereby extending the shelf life by 2–3 days. Therefore, the prepared photobactericidal films have more potential for application in aquatic products preservation.
研究领域:
食品科学
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材料科学
·
微生物学
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DOI
PubMed
高影响因子
TEXTILE RESEARCH JOURNAL
·
2015
·
IF 1.599
Xuying Nan,Guangdong Sun,Yi Huang,Qinguo Fan,Yuhua Yao,Jianzhong Shao
Eight visible photoinitiators composed of a series of erythrosine B derivatives with different structures, combined with ethyl-4-dimethylaminobenzoate and diphenyliodonium hexafluorophosphate, were evaluated for their photoinitiating characteristic and the tensile properties of photo-curing films initiated by them, to acquire the relationship between structure and performance. The visible photoinitiator was the key component for the pigmented visible photo-curing ink of textile digital printing. So, based on the experimental results, the preferred photoinitiator was incorporated into three pigmented photo-curing inks (red, yellow and blue) to perform textile digital jet printing. After photo-curing under visible light irradiation, the printed fabric samples showed excellent dry–wet rubbing fastness, and possessed a consistent hue with the samples initiated by the photoinitiator containing camphorquinone.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
·
IF 8.025
Shengyu Zhu,Ruchika Hansanie Ukwatta,Xingru Cai,Yalu Zheng,Feng Xue,Chen Li,Luxin Wang
This study explored the effect of erythrosine B (EB) as a photosensitizer in corn starch (CS) film and its physicochemical properties and photodynamic bacteriostatic ability against Staphylococcus aureus , Escherichia coli , and Salmonella both in vitro and inoculated on pork under the irradiation of D65 light-emitting diode (LED) (400-800 nm). The study revealed that the physiochemical properties of CS films: moisture content, water solubility, and water vapor transmission were improved with the addition of EB. In addition, the elasticity and the thermal stability of the film were enhanced. The results showed that the CS-EB films stimulated a maximum of 26.36 μg/mL hydrogen peroxide and 74.5 μg/g hydroxyl radical under irradiation. The CS composite films with a 5 % concentration of EB inhibited the bacterial growth by 4.7 Log CFU/mL in vitro after 30 min of illumination, and 2.4 Log CFU/mL on the pork samples under the same experimental condition. Moreover, the antibacterial ability was enhanced with the increase in EB concentration. Overall, the CS-EB composite films can inhibit the growth of bacteria through photodynamic inactivation and has the potential to become a new type of environmentally friendly packaging material.
研究领域:
食品科学
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材料科学
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微生物学
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 10
·
IF 1.768
Xuying Nan,Yi Huang,Qinguo Fan,Jianzhong Shao,Yuhua Yao
Three dye-linked photoinitiators with excellent spectral stability in an acid medium were synthesized by the covalent bonding of a coinitiator (tertiary amine) and a benzoyl group or two coinitiators to the phenolic and carboxyl group position of erythrosine B. The combination of the iodonium salt and free tertiary amino used to initiate the free-radical/cationic visible photopolymerization was investigated to acquire the relationship between the structure and performance. The photoinitiating ability of the derivative with the phenolic position bearing a coinitiator was poorer than of the derivative with the carboxyl group bearing one because of the strong back electron transfer of the former. For the derivative with a linked coinitiator on the carboxyl position, the proximity effect between the sensitizer and the coinitiator moiety resulted in an excellent photoinitiating ability for radical/cationic polymerization; this suggested its potential for application. Although radical/cationic photopolymerization could be initiated by the derivative/coinitiator/iodonium salt, the different component ratios between them had different effects on these two polymerizations; this provided useful information for the design of effective photoinitiators for different polymerizations. On the basis of the fluorescence quenching and photopolymerization results, a corresponding synergistic mechanism was proposed. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43035.
研究领域:
高分子科学
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材料化学
·
光化学
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DOI
高影响因子
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