DYES AND PIGMENTS
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2021
·
IF 4.889
Haifeng Lu,Lichao Xu,Hua Wang,Shengyu Feng
Fluorescent silicone polymers have attracted much attention owing to their strong fluorescence and high stabilities. However, most of these silicone polymers have suffered from fluorescence quenching caused by aggregation in high concentrations. In this work, 7, 11-diphenyl-8 H - acenaphth[1, 2 - f ] isoindole-8, 10 (9 H ) - dione functionalized polysiloxane (PMDF) with strong blue fluorescence was successfully synthesized via Diels-Alder reaction. Besides high thermal stability, PMDF showed unique aggregation-induced emission enhancement in high concentrations, indicating it is an excellent fluorescent silicone polymer in both disperse and aggregate state. Moreover, the product polymer showed highly sensitive fluorescence response to Fe 3+ , with low detection limit to 0.895 ppm and a high selectivity in the present of other metal ions. This work may open a new window for exploring fluorescent polymers as ideal probe for Fe 3+ .
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2020
·
IF 3.306
Xiaoye Wen,Li Yan,Zhefeng Fan
A novel and simple probe (denoted LN-1) with AIE property based on malononitrile and 4-diethylaminobenzaldehyde was designed and synthesized. The use of two different mechanisms for the independent detection of Fe 3+ and CN − is more convenient and efficient than the continuous detection of anions and cations. The detection mechanism was verified by mass spectrometry (MS), nuclear magnetic resonance (NMR) spectrum, and particle size distribution. Under optimized experimental conditions, excellent calibration curves were obtained for the LN-1-Fe 3+ and the LN-1-CN − with detection limits of 0.17 and 0.39 μM, respectively. This method was successfully applied to detect the content of Fe 3+ and total inorganic iron in actual samples. Owing to its low cytotoxicity, good biocompatibility, and enhanced orange emission in aqueous solution, the LN-1 was successfully applied for CN − imaging in live cells. In addition, Fe 3+ and EDTA incorporation into the LN-1 changed the fluorescent intensity, which is beneficial in constructing ultrasensitive INHIBIT logic gate.
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CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Xi Chen,Yunfeng Chen,Songrong Li,Cheng Xue,Dongfang Liu,Wenli Huang
Phthalic acid esters (PAEs) pose serious health risks to humans and are difficult to remove by conventional sewage treatment processes. Herein, Fe 2 Mo 3 O 8 /MoO 2 /Mo 2 N composite (FMON) derived from bimetallic organic framework was used to activate peroxymonosulfate (PMS) for dibutyl phthalate (DBP) degradation. FMON exhibited an excellent catalytic effect with DBP removal efficiency of 92.4 % within 60 min. Mo 2 N showed a superior ability in promoting Fe 3+ /Fe 2+ redox cycle. The reduction efficiencies of Fe 3+ by Mo 2 N/MoO 2 composite and MoO 2 were 67 %–94 % and 11 %–23 %, respectively, in the homogeneous comparative experiment. Moreover, the ratio of Fe 2+ /Fe 3+ in FMON increased significantly after the catalytic reaction. Fe element doping also enhanced the reuse stability and reduced the metal ion leaching of the catalyst. The degradation of DBP was mediated by a variety of reactive species, of which SO 4 − , OH and O 2 − were dominant. Fe element, Mo element and O vacancies were confirmed to exert significant contributions as active sites in the catalytic process. Three degradation pathways of DBP were obtained by DFT calculation and HPLC-MS analysis. And the toxicity of DBP degradation products was significantly reduced based on the assessment result of Toxicity Estimation Software Tool (T.E.S.T.). This study explored a novel Fe/Mo bimetallic catalyst with friendly Fe 3+ /Fe 2+ cycling for environmental catalysis and provided new ideas for the treatment of PAEs wastewater.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Sen Li,Jingyu Hu,Aaron Albert Aryee,Yuanqiang Sun,Zhaohui Li
Disposable medical masks are widely used to prevent respiratory infections due to their ability to block virus particles from entering the human body. The coronavirus disease 2019 (COVID-19) pandemic highlighted the importance of medical masks, leading to their widespread use around the world. However, a large number of disposable medical masks have been discarded, some carrying viruses, which have posed a grave threat to the environment and people's health, as well as wasting resources. In this study, a simple hydrothermal method was used for the disinfection of waste medical masks under high-temperature conditions as well as for their transformation into high-value-added carbon dots (CDs, a new type of carbon nanomaterial) with blue-emissive fluorescence, without high energy consumption or environmental pollution. Moreover, the mask-derived CDs (m-CDs) could not only be used as fluorescent probes for sensing sodium hydrosulfite (Na 2 S 2 O 4 ), which is widely used in the food and textile industries but is seriously harmful to human health, but also be used for detecting Fe 3+ which is harmful to the environment and human health due to its wide use in industries.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Kui Chen,Weixia Qing,Weiping Hu,Minghua Lu,Yong Wang,Xiuhua Liu
In this work, we reported an economical plant-based hydrothermal method for one-pot green synthesis of water-soluble carbon dots (Tea-CDs) by using waste tea extract as a carbon source. The synthesized Tea-CDs were characterized by UV–visible, fluorescence, FT-IR, TEM, XPS and XRD. The Tea-CDs were found to remove hydroxyl and superoxide anion radical in vitro. In addition, the Tea-CDs exhibited bright blue fluorescence under UV-light (λ ex = 365 nm), and the fluorescence could be effectively quenched by CrO 4 2− and Fe 3+ ions. Meanwhile, the fluorescence of Tea-CDs-CrO 4 2− and Tea-CDs-Fe 3+ systems could be again easily recovered by ascorbic acid (AA) and L-cysteine (L-Cys). As an on-off-on fluorescent nano-sensor of the Tea-CDs, the sensitive detection of CrO 4 2− , Fe 3+ , AA and L-Cys were all performed, showing that the good linear relationships between fluorescence intensity of Tea-CDs and concentration of all testing samples. Finally, the sensors successfully detected CrO 4 2− , Fe 3+ , AA and L-Cys in commercially available real samples with satisfactory recovery ranges. The prepared sensors offer distinct advantages including low cost, simple handling, good sensitivity and high selectivity.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 31
·31834-31845
·
IF 2.914
Zhang Mingming,Zhang Shengxiao,Liu Xingxing,Chen Hou,Ming Yongfei,Xu Qiang,Wang Zhenhua
A novel multi-functional and environmental friendly tannic acid polymer (Fe 3+ -TA-HCHO) with Fe 3+ and formaldehyde as double crosslinking agents together with cysteine as heteroatom source was prepared by a one-pot hydrothermal method. Characterization with transmission electron microscope (TEM), scanning electron microscopy (SEM), Fourier transform infrared spectrometer (FT-IR), and elemental analysis demonstrated that the Fe 3+ -TA-HCHO possessed uniform structure and particle size as well as plentiful functional groups. The resulted Fe 3+ -TA-HCHO material as a adsorbent to remove methylene blue, sunset yellow, Pb 2+ , Hg 2+ , and AsO 3 3− from water. The results suggested that Fe 3+ -TA-HCHO polymer (pHpzc is 2.33) showed different adsorption properties for anionic pollutants (sunset yellow and AsO 3 3− ) and cationic pollutants (methylene blue, Pb 2+ , and Hg 2+ ). The material exhibited remarkable selectivity for adsorption and separation of pollutants. The maximum adsorption capacities calculated from Langmuir model for methylene blue, Pb 2+ , and Hg 2+ were 154.32, 819.67, and 699.30 mg g −1 , respectively. This is the first time that tannic acid polymer is synthesized by double crosslinking method, which not only developed a promising adsorbent for selective removal of cation pollutants, but also opened up a new avenue for synthesis and application of tannic acid polymer.
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ACS Applied Materials & Interfaces
·
2017
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IF 7.504
Yinghua Liu,Wenxiu Duan,Wei Song,Juanjuan Liu,Cuiling Ren,Jiang Wu,Dan Liu,Hongli Chen
Colorimetric and fluorescent dual mode detection methods have gained much attention in recent years; however, it is still desirable to develop new colorimetric and fluorescent dual mode nanosensors with more simple preparation procedures, low cost, and excellent biocompatibility. Herein, a colorimetric and fluorescent nanosensor based on B, N, S-co-doped carbon dots (BNS-CDs) was synthesized by one-step hydrothermal treatment of 2,5-diaminobenzenesulfonic acid and 4-aminophenylboronic acid hydrochloride. Using this nanosensor, a highly sensitive assay of Fe3+ in the range of 0.3–546 μM with a detection limit of 90 nM was provided by quenching the red emission fluorescence. It is more attractive that Fe3+ can also be visualized by this nanosensor via evident color changes of the solution (from red to blue) under sunlight without the aid of an ultraviolet (UV) lamp. Furthermore, the designed nanosensor can be applied for efficient detection of intracellular Fe3+ with excellent biocompatibility and cellular imaging capability, and it holds great promise in biomedical applications.
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JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Shiman Zhang,Binghao Zhang,Jiahui Li,Liming Fan,Jiangfeng Song,Rongmei Wen
In this study, we selected the zwitterionic flexible carboxylate ligand 1,1′,1″-((2,4,6-trimethylbenzene-1,3,5-triyl)tris(methylene))tris(pyridine-1-ium-4-carboxylate) (H 3 L Br 3 ) to successfully construct a novel metal-organic framework [Eu 2 L 4 (H 2 O) 4 ]·6Br 17.5H 2 O (Eu-MOF) with a novel {4^2.6}{4^3.6.8^4.10^2}{4} topology. Remarkably, this material represents the first reported MOF to successfully accommodate both tridentate and bidentate coordination modes of ligand L, breaking through the conventional limitation of monomodal coordination observed in previous systems. Fluorescence sensing experiments demonstrate that the Eu-MOF exhibits outstanding sensing performance toward nitrobenzene (NB), Fe 3+ , and Cr 2 O 7 2− , showing excellent selectivity, high sensitivity, superior selectivity capability, and good recyclability, which enables its application as a multifunctional luminescent sensor for simultaneous detection of these three analytes. This study holds significant guiding importance for the future synthesis of innovative complexes based on such ligands and their applications in the field of fluorescence sensing.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Piaotong Liu,Yabin Wang,Weize Shi,Xin Li
Water contamination by explosive compounds and heavy metal ions poses serious risks to ecosystems and human health worldwide. Among them, 2,4,6-trinitrotoluene (TNT), a persistent nitroaromatic explosive, is frequently found in military and industrial wastewater, as well as residues from civilian blasting activities. Ferric ions (Fe 3+ ), commonly discharged through various industrial processes, also present a significant environmental threat. Therefore, the development of effective detection methods for both TNT and Fe 3+ in aquatic environments is of great importance for environmental monitoring and pollution control. Herein, we report a novel dual-emission ratiometric fluorescent probe, CNQDs/Eu-MOF-76, capable of simultaneously and selectively detecting both TNT and Fe 3+ in aqueous environments. The probe combines blue-green fluorescence from carbon quantum dots (CNQDs, 496 nm) and red fluorescence from Eu-MOF-76 (618 nm), enabling a distinct ratiometric response upon analyte recognition. It exhibits high sensitivity, with a detection limit for TNT as low as 0.4 nM and a linear range from 0 to 6.3 nM. Moreover, the probe shows excellent selectivity toward TNT and Fe 3+ over various common ions. Its practical applicability was validated in real water samples (river, tap, and drinking water), demonstrating satisfactory recoveries and good reproducibility. This strategy offers a rapid, cost-effective, and reliable tool for environmental monitoring and water quality protection.
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Analytical Methods
·
2014
·Vol. 6
·期 16
·6445-6451
·
IF 1.938
Xiaoyu Mu,Li Qi,Juan Qiao,Huimin Ma
The simplicity of the one-pot green synthesis routine and the capability of surface modification of various bioactive molecules make gold nanoclusters (Au NCs) highly suitable as scaffolds for the construction of novel chemical and biological sensors. In this work, we report a novel strategy to prepare amino acid stabilized fluorescent Au NCs via a green one-pot process. The obtained Au NCs possessed light green fluorescence with maximum emission at 498 nm and their quantum yield (QY) was evaluated to be 1.68%. Subsequently, the developed fluorescent Au NC biosensor allowed sensitive and selective detection of Fe3+ ions based on fluorescence quenching with a detection limit of 0.2 μM and Al3+ ions based on enhanced fluorescence with a detection limit of 0.3 μM, respectively. Furthermore, we testified the feasibility of applying this fluorescent probe for real sample analysis through the detection of Al3+ ions and Fe3+ ions in lake water, pond water and tap water. These results indicated that the as-prepared Au NCs had great potential to be developed as the favorable sensor for detection of metal ions in real samples.
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ACS Omega
·
2022
·
IF 4.132
Bowen Zhang,Wei Liu,Xiangrong Wu,Jinhua Zhu,Weiping Hu,Abdelhadi El Jaouhari,Xiuhua Liu
In the past decade, carbon dots (CDs) have attracted considerable attention due to their excellent properties such as low toxicity, good biocompatibility, good fluorescence imaging, etc. Here, glutathione and l-tryptophan were used as carbon sources to hydrothermally synthesize CDs for sensitive and selective off/on detection of Fe3+ ions. The CDs are spherical nanoparticles with an average particle size of 3.8 nm and the presence of organic groups such as hydroxyl, carboxyl, sulfhydryl, and amino groups on their surface. The experiment results display that Fe3+ ions can be selectively and sensitively detected by quenching the fluorescence of CDs. Moreover, the fluorescence of the CDs+Fe3+ system can be restored after adding ascorbic acid. Thus, an off/on fluorescent probe for the determination of Fe3+ can be formed using the as-synthesized CDs solution. The CDs show a good linear range of 0–13.89 mM and a 0.0331 μM limit of detection for Fe3+, and the most probable mechanism concluded from ultraviolet–visible spectroscopy, electrospray ionization–mass spectrometry, and fluorescence spectrophotometry is a mixed static and dynamic quenching. Furthermore, the cytotoxicity experiment results show that CDs have low toxicity and can be used for intracellular imaging.
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ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Xiangyu Ma,Kun Qian,Onome Ejeromedoghene,Martha Kandawa-Schulz,Yihong Wang
MicroRNAs (miRNAs) are becoming biomarkers for the clinical diagnosis of many diseases. However, their intrinsic properties such as low enrichment and short sequence restrict their applications. Here, we designed an ultrasensitive dual signal amplification electrochemical biosensor based on sodium alginate-polypyrrole/Au nanoparticles (SA-PPy/AuNPs) nanocomposite for the detection of miRNAs. Firstly, a planar intercalated copper(II) complex was synthesized to be the signal molecule. Then, catalytic hairpin assembly (CHA) reaction and catalytic reaction between ferric ion and copper ion were combined as a dual signal amplification to improve the sensitivity of the biosensor. In the presence of target miRNAs, multiple double helix structure formed for the CHA reaction was triggered, which immobilized more copper(II) complex on the surface of the working electrode and a strong signal was obtained in the square wave voltammetry (SWV) test. Also, the signal can be re-amplified again in the presence of ferric ion in the electrolyte. Under the optimal conditions, based on these strategies, a sensitive electrochemical biosensor was constructed for the detection of miRNAs in the range of 1 fM to 1 nM and the limit of detection was as low as 0.34 fM. Furthermore, the developed biosensor with excellent selectivity and reproducibility tested on human serum samples shows broad application prospects in the early stage of tumor diagnosis.
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