SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2014
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IF 2.129
Linlin Wang,Yizhong Shen,Shaopu Liu,Jidong Yang,Wanjun Liang,Dan Li,Youqiu He
The interactions of topotecan hydrochloride (THC), neutral red (NR) and thioglycolic acid (TGA) capped CdTe/CdS quantum dots (QDs) built a solid base for the controlling of the fluorescent reversible regulation of the system. This study was developed by means of ultraviolet–visible (UV–vis) absorption, fluorescence (FL), resonance Rayleigh scattering (RRS) spectroscopy and transmission electron microscopy (TEM). Corresponding experimental results revealed that the fluorescence of TGA-CdTe/CdS QDs could be effectively quenched by NR, while the RRS of the QDs enhanced gradually with the each increment of NR concentration. After the addition of THC, the strong covalent conjugation between NR and THC which was in carboxylate state enabled NR to be dissociated from the surface of TGA-CdTe/CdS QDs to form more stable complex with THC, thereby enhancing the fluorescence of the TGA-CdTe/CdS QDs-NR system. What is more, through analyzing the optical properties and experimental data of the reaction between TGA-CdTe/CdS QDs and NR, the possible reaction mechanism of the whole system was discussed. This combination of multiple spectroscopic techniques could contribute to the investigation for the fluorescent reversible regulation of QDs and a method could also be established to research the interactions between camptothecin drugs and dyes.
研究领域:
药理学
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纳米生物学
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
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2021
·
IF 7.086
Han Chen,Yanan Yu,Yu Yu,Jiexu Ye,Shihan Zhang,Jianmeng Chen
Effective electron transfer (ET) between microorganisms and electrodes is essential for the toluene degradation and power generation in a microbial fuel cell (MFC). In this work, the neutral red, with excellent electrochemical reversibility and compatible redox potential as NADH/NAD + , was selected as electron mediator to boost the performance of the MFC. Experimental results revealed that, with the 0.5 μM neutral red, the removal efficiency and coulombic efficiency of the gaseous toluene powered MFC was increased by ~19% and ~400%, respectively. However, further increase in neutral red concentration resulted in a decreased in removal efficiency and coulombic efficiency, which was attributed by the toxicity of neutral red to the microbes. The microbial community analysis indicated that, with the dosage of the neutral red, the dominated bacteria shifted from Geobacter to Ignavibacteriales , resulting in a high coulombic efficiency. With the further increase in the neutral red, the amount of Ignavibacteriales gradually decreased and thus the coulombic efficiency declined at a high neutral red concentration. Based on the cyclic voltammetry analysis, an electron transport pathway involving neutral red, cytochromes , and OMCs in neutral red mediated MFC was proposed. Overall, the dosage of neutral not only enhanced the electron transfer but also induced the growth of the exoelectrogens, and thus significantly improve the MFC performance.
研究领域:
环境科学
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微生物学
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DOI
PubMed
高影响因子
BIOTECHNOLOGY LETTERS
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2024
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IF 2
Zhao Shuo,Zeng Yu,Li Ying,Wang Zhen,Chen Li,Chen Kequan
This investigation probes the role of the electron mediator, neutral red (NR), in the electrosynthesis process, specifically examining its effect on the production of succinic acid by Actinobacillus succinogenes . Our findings reveal that NR, when integrated into the cell membrane, is pivotal for sustaining MEC efficiency. Nevertheless, it is susceptible to both intrinsic and MECs-induced degradation. Notably, during the exponential growth phase of the bacteria, NR is readily incorporated into the cell membrane. However, the supplemental addition of NR fails to significantly enhance the MEC’s capacity for succinic acid synthesis, no matter what stage of bacterial growth. And significant depletion of membrane-associated NR is not adequately compensated by the NR present in the fermentation liquid. The ORP feedback-regulated MECs adeptly conserve the NR on the cell membrane, which is essential for maintaining the efficiency of long-term electrosynthesis. The presence of NR on the cell membrane is essential for the functionality of MECs, yet its external replenishment hard. Implementing precise electro-potential regulation strategies can effectively diminish the degradation of NR, thus maintaining the system’s efficiency.
研究领域:
微生物学
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电化学工程
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生物技术
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DOI
PubMed
高影响因子
SENSORS
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2018
·Vol. 18
·期 3
·681
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IF 2.475
Xiaoyang Du,Xiaoxia Zhang,Chunlai Jiang,Weilu Zhang,Lizhu Yang
A novel fluorescence sensor of NR-β-CD@AuNPs was prepared for the trace detection of nitrite in quantities as low as 4.25 × 10−3μg∙mL−1in an aqueous medium. The fluorescence was due to the host-guest inclusion complexes between neutral red (NR) molecules and gold nanoparticles (AuNPs), which were modified by per-6-mercapto-beta-cyclodextrins (SH-β-CDs) as both a reducing agent and a stabilizer under microwave radiation. The color of the NR-β-CD@AuNPs changed in the presence of nitrite ions. A sensor was applied to the determination of trace nitrites in environmental water samples with satisfactory results.Keywords:gold nanoparticles;cyclodextrin;neutral red;nitrite ions;fluorescence sensor;trace detection
研究领域:
分析化学
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环境科学
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材料科学
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DOI
PubMed
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
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2025
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IF 2.3
Hongjuan Bai,Dan Liu,Gang Wang,Yuanyuan Feng,Xuanyan Zhu,Huiling Lu,Pengzhan Guo,Yifei Ding,Shuai Yang,Junhang Chen
In this study, we synthesized a novel sulfonated polybenzothiazole (sPBT) which permitted the development of a sodium alginate-based composite (SA-sPBT), and this composite demonstrated promising potential as an adsorbent for the simultaneous removal of Malachite Green (MG) and Neutral Red (NR) from aqueous solutions. Experimental results revealed that SA-sPBT exhibited excellent adsorption performance for MG and NR in both single and binary dye systems. The adsorption isotherms of MG and NR in single-dye systems were well described by the Langmuir model. Kinetic studies showed that both MG and NR adsorption aligned with pseudo-second-order and pseudo-first-order models, respectively. Thermodynamic analyses indicated that the adsorption processes for both dyes were endothermic, spontaneous and feasible. The statistical physics model revealed distinct adsorption behaviors: in single-component systems, NR was adsorbed predominantly via pure non-parallel orientations, while MG exhibited no pure non-parallel orientation at a single adsorption site on SA-sPBT. In the binary dye system, competitive adsorption was observed, with NR showing higher adsorption energy compared to MG, leading to its preferential attachment to adsorption sites. Mechanistic insights were further explored using FT-IR, XPS and DFT calculations, confirming the efficacy of the SA-sPBT composite for organic dye removal from wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Desalination and Water Treatment
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2024
·
IF 1
Shanshan Chen,Kang Wen,Xiaoting Zhang,Ruize Zhang,Runping Han
Metal organic frameworks are attracting scientific interest in adsorption applications owing to their large surface area and controllable pore size or shape over both microporous and mesoporous domains. Based on this, an iron(III) trimesic acid MIL-100(Fe) was facilely synthesized by hydrothermal treatment and used as adsorbent to remove neutral red (NR) from aqueous solution. MIL-100(Fe) was characterized using X-ray diffraction, scanning electron microscopy and transform infrared spectroscopy. MIL-100(Fe) was studied in view of the adsorption isotherms, thermodynamics, kinetics, and regeneration of the adsorbent. The adsorption kinetics data of NR were found to be in agreement with pseudo-second-order model. Temkin model was observed to be more suitable than Freundlich and Langmuir models in describing the adsorption isotherm. The maximum adsorption quantity was 333 mg g –1 at 313 K from Langmuir model. Thermodynamic parameters indicated that the NR adsorption process was endothermic and spontaneous. The NR-loaded MIL-100(Fe) adsorbent was regenerated and reused using pH = 2, 75% ethanol. A single-stage batch design for NR adsorption onto MIL-100(Fe) was also presented based on Temkin isotherm model equation. Based on the findings, MIL-100(Fe) is a promising adsorbent for the removal of cationic dyes from solution and thus can be used in practical application.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
Sustainable Materials and Technologies
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2025
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IF 9.2
Dan Xu,Yuwei Hua,Yanyan Huang,Yiming Zhao,Xin Chen,Jingyuan Zhang,Ge Chen,Guangyang Liu,Zhijian Wu,Xiaomin Xu,Donghui Xu
The rapid industrialization and extensive use of synthetic dyes have led to significant environmental pollution, particularly through dye wastewater, which poses severe ecological risks. Conventional single treatment methods often struggle to effectively remove complex and stable dye molecules. In this study, we developed COF-based chitosan hydrogel microspheres by combining COF-LZU1 and Co(OH)₂ via co-precipitation and self-assembly techniques. The synergistic effect between COF and Co(OH)₂ enabled simultaneous adsorption and degradation of neutral red, significantly enhancing the adsorption capacity. Under optimal conditions (15 mg of composite material, 20 min reaction time, pH = 7), the composite exhibited an adsorption capacity of 1325.48 mg/g and a degradation efficiency of 100 %, surpassing the performance of most conventional adsorbents. Furthermore, the incorporation of Co(OH)₂ into COF enhanced the stability of the composite material, as indicated by thermodynamic analysis and adsorption performance across different component ratios. Adsorption process modeling revealed that the adsorption kinetics fit well with the Elovich model, while isothermal adsorption followed the Langmuir model. Among common interfering substances, CH₃COO − was found to enhance the catalytic process, whereas humic acid inhibited it. Quenching experiments and EPR analysis confirmed that superoxide anion radicals (•O₂ − ) and singlet oxygen ( 1 O₂) were the primary active species in the catalytic process, with hydroxyl radicals (•OH) playing a relatively minor role. This study highlights the synergistic interaction of COF and Co(OH)₂ in improving adsorption performance, stability, and catalytic efficiency, providing a novel strategy for the preparation of advanced composite materials and new insights into pollutant removal mechanisms.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
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2011
·Vol. 22
·期 2
·602-608
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IF 5.101
Jinping Song,Jie Qiao,Shaomin Shuang,Yujing Guo,Chuan Dong
The preparation of neutral red covalently-functionalized graphene nanosheets (NR-FGN) is presented via replacement of the carboxyl acid groups at the edges of graphene nanosheets using NR. The obtained NR-FGN was characterized by UV-vis, Fourier transform infrared (FT-IR), Raman spectroscopy, X-ray diffraction (XRD) and transmission electron microscopy (TEM). It was found that the introduction of NR at the edges of graphene nanosheets (GN) improved the solubility and stability of the graphene. The electrochemical impedance result further confirmed that NR-FGN could effectively accelerate the electron transfer. Due to the synergic effect between GN and NR, the nanocomposite exhibited excellent electrocatalytic activity toward the oxidation of uric acid.
研究领域:
材料科学
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生物医学工程
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电化学
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DOI
高影响因子
ANALYST
·
2025
·
IF 3.3
Wei Wei,Yiwei Zhang,Mengdi Yu,Di Shen,Xiyu Sun,Mingshi Fu,Chi Zhang,Zhenzhen Jia,Mingzhen Zhang
Dry eye disease (DED) is a prevalent condition characterized by a multifaceted etiology, with its incidence exhibiting an upward trajectory. Consequently, it is imperative to develop a sensitive, straightforward, and convenient method for the analysis of biomarkers associated with DED to facilitate its auxiliary diagnosis. Lysozyme (LYZ), produced by the lacrimal gland, is a class of antibacterial enzymes believed to play a crucial role in immunity and is associated with DED. In this study, a novel fluorescent sensing platform utilizing neutral red-heparin sodium (NR-HS) was developed with LYZ as the target. The platform operates on the principle of static quenching, where HS effectively quenches the fluorescence of NR. As a hydrolase, LYZ can catalyze the hydrolysis of the glucoside bond in HS, thereby modulating the transformation of NR-HS fluorescence signal. This provides a straightforward fluorescent method for monitoring LYZ levels. Under optimal conditions, the developed "on-off-on" NR-HS sensing platform demonstrated the capability to detect LYZ within a range of 0.5 to 10 µg/mL, with a detection limit of 0.42 µg/mL, and exhibited enhanced specificity for LYZ. In conclusion, a cost-effective, rapid, and efficient LYZ sensing platform was established, which facilitates the diagnosis of DED and shows potential as a diagnostic detection technique.
研究领域:
医学诊断
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生物化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2023
·
IF 4.3
Chunhui Yi,Fanyong Yan,Xin Wei,Yawei Wu,Xueyu Wang,Jinxia Xu
Based on the fluorescence resonance energy transfer (FRET) principle, a yellow-green light fluorescent probe was designed and synthesized for the detection of neutral red using fluorescein monoaldehyde-3-acetylcoumarin as the fluorophore. The fluorescein moiety in the probe structure is readily interchangeable and heterogeneous in the form of an anion, and the neutral red is a quaternary ammonium salt structure with N. Therefore, the two are bound together in the form of ionic bonds through the mutual attraction of anions and cations. At the same time, FRET occurs, resulting in the absorption of the fluorescence emitted by the probe by the neutral red molecule, leading to a significant quenching of its fluorescence. The probe has a high selectivity for neutral red with a linear range of 0–30 μM and a detection limit of 8. 68 μM. Furthermore, the fluorescent probe has been successfully applied to the detection of neutral red content in real water samples with a recovery of 101 %-115 %. The probe has promising potential in the quantitative detection of neutral red.
研究领域:
分析化学
·
生物化学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Xiaojun Jv,Xiaowei Zhao,Hucheng Ge,Jingyi Sun,Hai Li,Qiusheng Wang,Hongguang Lu
At present, synthetic dyes have been widely used in several industries such as textiles, rubber, paper, plastic, and leather tanning. The dyes in effluents are among the most aggressive pollutions of all the industrial sectors and can lead to severe water contamination as well as resource waste without proper treatment and recovery. In the present work, magnetic poly(aspartic acid)-poly(acrylic acid) hydrogels (PAsp-PAA/Fe3O4) with semi-interpenetrating networks are successfully prepared. Their physicochemical properties are systematically characterized using scanning electron microscopy, Fourier transform infrared spectroscopy, the Brunauer–Emmett–Teller method, thermogravimetric analysis, and vibrating sample magnetometry. Organic dye methylene blue (MB) and neutral red (NR) adsorption onto the PAsp-PAA/Fe3O4 hydrogel are studied for the first time, and the maximum adsorption capacities of MB and NR are calculated by using the Langmuir model as 357.14 and 370.37 mg·g–1, respectively. The adsorption kinetics can be well described by a pseudo-second-order kinetic model. Furthermore, reusability tests indicate that the hydrogel has good reproducibility. In conclusion, the results demonstrate that the PAsp-PAA/Fe3O4 hydrogel can used as an excellent adsorbent material for removing dye pollutants from wastewater.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Tianyi Hu,Qun Liu,Shoumei Wan,Liangting Deng,Xu Zeng,Wuyin Weng,Yucang Zhang
Real-time monitoring of food freshness is an efficient strategy to ensure food safety. In this work, a biomass-derived antibacterial and high-strength film featuring an intelligent freshness indication was developed, utilizing neutral red-bromothymol blue (NR-BTB) as a couple indicator, while high amylose corn starch-cinnamaldehyde (HACS-CIN) and bacterial cellulose nanofibers (BCNFs) as the film matrix. The FT-IR and encapsulation efficiency results demonstrated that the CIN was successfully encapsulated within the helical structure of the HACS via intermolecular interactions. The HACS-CIN/BCNFs films exhibit strong antibacterial activity against E. coli and S. aureus . After the incorporation of NR-BTB, the composite films exhibited a high mechanical strength of 27.05 ± 2.57 MPa and a responsive color change within a pH of 3 11. The multifunctional film maintained satisfactory color stability at both 4°C and 25°C at different humidity over 14 days. The cytotoxicity test indicated the composite films have good biocompatibility. As the freshness of the shrimp declined and the levels of TVB-N increased during storage, the color of the multifunctional film significantly changed from reddish-brown to yellowish-brown. This composite film exhibited sensitive pH responsiveness and no leakage in fat simulant. The results indicated that the composite film has the potential to be a real-time food freshness indicator.
研究领域:
食品科学
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材料科学
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生物工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）