SENSORS AND ACTUATORS B-CHEMICAL
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2024
·
IF 8
Kang Yang,Shuaibo Shi,Shaolong Han,Jinyu Wu,Sichen Li,Rui Zhu,Shengdi Tai,Kun Zhang
Despite the tremendous advances that have been made in selective detection of a wide range of inorganic anions and cations, a single fluorescent probe possessing a high discrimination ability for these ions and their analogues is still very rare. Herein we propose a mononuclear europium-macrocycle complex Eu - 2 l which employs the imine bond interaction sites and embeds europium ion into a Schiff-base macrocyclic cavity interior to construct the dual-emission matrix for the lab-on-a-molecule fluorescent probe . Eu - 2 l not only allows the conventional spectral analysis for significant intensity changes of emission bands but also enables the statistical analysis for different levels of fluorescence sensing signals. As a result, this novel fluorescent platform Eu - 2 l shows the great real-time, selective, sensitive and quantitative detection ability for PO 4 3- or Al 3+ among common inorganic ions . Furthermore, when sensing signals of anions and cations on different fluorescence channels are systematically evaluated by principal component analysis (PCA) and hierarchical cluster analysis (HCA) methods, Eu - 2 l allows the high-through discrimination of not only 18 anions and 12 cations but also several analogues and their proportional mixtures, even in real environmental water sample. This work enriches the PO 4 3- and Al 3+ chemosensors , highlights huge benefits of the combination multi-emission fluorescent matrix and statistical analysis methods and thus provides a vital reference to construct the lab-on-a-molecule probe by a single chemical entity for multianalyte detection and discrimination in various fields.
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MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 7
·1-11
·
IF 6.232
Mao Xiaoxia,Liu Shaowei,Su Benyue,Wang Dejin,Huang Zhan,Li Jian,Zhang Yuanguang
A luminescent metal-organic framework of type Eu(III)-MOF has been fabricated for visual and on-site fluorometric determination of hydrogen peroxide (H 2 O 2 ) via a tablet computer. The maximum excitation and emission peaks of type Eu(III)-MOF were found at λex = 290 nm and λem = 615 nm, respectively. The average length of Eu-MOF is 1.21 ± 0.07 μm. In the presence of the target H 2 O 2 , Fe 2+ is transmitted into Fe 3+ via Fenton reaction, leading to a fluorescence quenching of Eu-MOF. Therefore, visible color change occurred from bright red into colorless. Interestingly, by means of tablet computer’s digital camera and ImageJ software, fluorescent signals were captured and transduced into digital parameters, resulting in a linear relationship between fluorescence intensity and the concentration of H 2 O 2 . As a result, the determination of H 2 O 2 without the aid of complicated instruments is achieved in the range 2.0 μM to 0.2 mM with a detection limit of 1.02 μM. Our approach has been successfully applied to quantify H 2 O 2 in serum, urine, and waste water with good recovery and precision (< 2.5% RSD). Besides, our assay has been exploited for visual detection of H 2 O 2 released from HepG2 cells with the advantages of portability and accuracy. Moreover, the strategy displays acceptable selectivity and stability. Hence, our assay provides an alternative practical method for on-site determination of H 2 O 2 without the need for instruments.
Schematic representation of the synthesis procedure of a luminescent Eu-MOF, which has been successfully applied for on-site detection of H 2 O 2 via Fenton reaction and imaging analysis technique. The method exhibits handheld and accuracy for H 2 O 2 determination, holding the potential for biochemical and clinical applications in remote regions.
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JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Xiayu Liang,Aylin M. Deliormanlı,Qingle Zeng
A novel composite material, Poly(IL-AA)@MIL-101(Cr), combining metal-organic framework, polymeric ionic liquid and acrylic acid, was synthesized for the selective and efficient adsorption of rare earths europium(III) (Eu 3+ ). Characterization of the materials was carried out using techniques such as X-ray diffraction (XRD), Fourier transform infrared (FTIR), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), thermogravimetric analysis (TGA) and Brunauer-Emmett-Teller (BET). The results demonstrate successful incorporation of the polymeric ionic liquid onto the material surface while preserving the crystal structure and morphology of MIL-101(Cr). Adsorption experiments were conducted to explore parameters including solution pH, initial Eu 3+ concentration, and duration, with comprehensive analyses of adsorption kinetics, isotherms, and mechanisms. Findings reveal that Poly(IL1-AA)@MIL-101(Cr), Poly(IL3-AA)@MIL-101(Cr), and Poly(IL5-AA)@MIL-101(Cr) achieve adsorption equilibrium for Eu 3+ at approximately 9 h with an equilibrium pH of 6.2. The adsorption of Eu 3+ predominantly follows a pseudo-second-order kinetic model and Langmuir isotherm adsorption model. Moreover, the prepared composite material exhibits superior adsorption selectivity for Eu 3+ over other metal ions in the mixture (K + , Mg 2+ , Ni 2+ , Co 2+ , Zn 2+ , La 3+ , and Nd 3+ ). Even after five adsorption-desorption cycles, the composite material maintains satisfactory adsorption performance.
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高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Xu Chu,Tao Chen,Yan Cao
This paper reports a simple, rapid and sensitive fluorescence sensor for the parallel determination of iron (III) (Fe 3+ ), terbium (III) (Tb 3+ ) and europium (III) (Eu 3+ ) ions using Carbon Dot (CD) serving as a fluorescence probe. The Carbon Dot (CD), which was synthesized via an acid-cutting method using anthracite coal as the carbon source, was found to have rich carboxyl and hydroxyl groups on its surface. The fluorescence of the as-prepared CD can be selectively quenched by the Fe 3+ ion via non-radiative electron-transfer, and furthermore, the as-prepared CD can also sensitize the luminescence of both Tb 3+ and Eu 3+ ions through the antenna effect and enhance the fluorescence of Tb 3+ and Eu 3+ by more than several orders of magnitude. Therefore, the as-prepared CD was applied as a fluorescence probe towards the parallel determination of Fe 3+ , Tb 3+ and Eu 3+ and exhibited detection limits in 0.019, 0.10 and 0.79 μM, respectively. The fluorescence quenching mechanism and energy transfer mechanism were also studied in details.
研究领域:
分析化学
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环境监测
·
纳米材料
·
荧光探针
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生物传感
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PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2023
·Vol. 220
·期 13
·2300087
·
IF 2
Zhou Zou,Dengwei Zhang,Arun Murali,Chaoyi Chen,Li Liu,Yuanpei Lan,Junshan Zhang,Fengyuan Liu,Zhiyao Chu,Deyang Ning,Junqi Li
Herein, size-controllable spherical yttrium carbonate powders with D 50 in range from 225 to 743 nm are synthesized from Y(NO 3 ) 3 ·6H 2 O and urea. With the rise of the concentration ratio of urea/Y 3+ , temperature, and extension of aging time, diameter of yttrium carbonate spheres increases. When the urea/Y 3+ is 40: 1 and ages for 4 h at 90 °C, the D 50 of synthesized powder, which has been determined as Y(OH)CO 3 ·1.3H 2 O, has the largest D 50 of 743 nm with (D 90 –D 10 )/2D 50 of 0.22. After decomposition, the D 50 of formed Y 2 O 3 decreases to 632 nm, the (D 90 –D 10 )/2D 50 is 0.24, and the D 50 of Y 2 O 3 is in the range of 126–632 nm. Then, 6 mol. % Eu 3+ is homogeneously doped into Y(OH)CO 3 ·1.3H 2 O and Y 2 O 3 : Eu 3+ spherical powder is obtained after roasting, which exhibits a strong emission peak at 613 nm. The developed synthetic method and the obtained size-controllable spherical Y(OH)CO 3 ·1.3H 2 O, Y 2 O 3 , and Y 2 O 3 : Eu 3+ with a uniform size distribution own various potential applications.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 6
·2804-2813
·
IF 11.9
Peng Zhang,Yizhi Chen,Hanqin Weng,Yusa Muroya,Shinichi Yamashita,Yinhua Zhao,Mingzhang Lin
Reduced graphene oxide (rGO) composite aerogels were synthesized by the radiation reduction of graphene oxide (GO) with the assistance of Eu3+, which demonstrated excellent adsorption performance for diverse organic pollutants. Eu3+ promoted the formation of the gel by inducing the pre-assembly of GO so that the required pH range for synthesizing the rGO aerogel by radiation reduction was broadened and the minimum absorbed dose was also reduced. At pH 2, the Eu3+-induced pre-assembly fabricated more mesopores and enlarged the specific surface area of the obtained hierarchically porous rGO-Eu composite aerogel, which enabled the high-capacity (81–395 g g−1) and ultrafast removal of organic solvents. The different effects of organic solvents on the unique fluorescence emission of Eu(III) also allowed the in situ detection of certain organic solvents such as pyridine. At pH 6, Eu3+ enhanced the reduction of GO by capturing more hydrated electrons, the most reductive species produced by water radiolysis, and synergistically reduced GO. The obtained rGO-Eu composite aerogel with a high reduction degree, demonstrated outstanding adsorption capacities for various anionic organic dyes (40.5–1572.5 mg g−1) owing to the strong π–π interaction and electrostatic attraction. Benefitting from high reduction, it demonstrated adsorption capacity for cationic dyes (97.3–1367.6 mg g−1) comparable to other reported graphene-based aerogels. The rGO-Eu aerogel prepared by radiation reduction might be suitable as a broad-spectrum adsorbent for organic pollutants.
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Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 41
·15613-15619
·
IF 8.067
Xinzhe Zhou,Tiezhen Ren,Jian Yin,Xiurong Zhang,Peng Li,Huanrong Li
Developing a broadband yellow emission phosphor that covers green to orange light regions is an effective way to achieve high-quality solid-state lighting. A broadband yellow phosphor with excellent thermal stability was obtained by heating a europium-doped SOD zeolite under a reducing atmosphere. Under UV excitation, the phosphor exhibits a broad emission band (FWHM = 120 nm) and high thermal stability (80% intensity at 423 K). Prototype white LEDs using this broadband yellow-emit phosphor, a blue-emit phosphor (NaMgBO3:Ce3+), and a red-emit phosphor (Sr2Si5N8:Eu2+) show excellent color quality (CRI = 93, R10 = 88) and a low correlated color temperature (CCT = 4219 K), outperforming most of the tricolor phosphor-converted NUV-LEDs. This work highlights the great potential of lanthanide-doped zeolites in developing promising phosphors for high quality lighting.
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JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Shuai Han,Liang Yang,Zhigang Wen,Suyun Chu,Mei Wang,Zhenyang Wang,Changlong Jiang
Residues in animal food and drinking water caused by the abuse of antibiotics lead to cell resistance and many chronic diseases in the human body. Therefore, it has become an inevitable trend to develop a fast, easy-to-use, on-site/real-time visualization method for the detection of antibiotics. Herein, we report a dual-response ratiometric fluorescence sensor which is fabricated by chelating europium ions (Eu 3+ ) onto cadmium telluride quantum dots (CdTe QDs) for real-time and visible detection of tetracycline (TC). With the TC addition, the fluorescence of probe can be seen by the naked eye, from green to yellow and finally to red, exhibiting a dosage-sensitive and broad-chromatic detection strategy for TC. The fluorescence intensity ratio of I 616 /I 512 of Eu/CdTe QDs sensor displays a good linear relation to TC concentrations in the range of 0–80 μM with a limit of detection (LOD) of 2.2 nM. In addition, the sensor can visually detect 200 nM TC in actual samples, which is lower than the maximum residue limit (MRL) of the safety standard. The methodology reported here opens a window toward the real applications of fluorescent and shows the wide applicability in pursuing the concepts simple, rapid, visual, and real-time for food safety and environmental protection.
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Journal of Materials Chemistry B
·
2018
·Vol. 6
·期 37
·6008-6015
·
IF 4.776
Fengyi Wang,Xuan Hu,Jing Hu,Qianqian Peng,Baozhan Zheng,Juan Du,Dan Xiao
In this study, bimetallic lanthanide coordination polymer nanoparticles (Tb-GMP-Eu CPNs) were developed for sensing alkaline phosphatase (ALP) by utilizing guanine monophosphate (GMP) as the bridge ligand to self-assemble with Tb3+ and Eu3+ in Tris–HCl buffer solution. In this polymer framework, an efficient energy transfer from Tb3+ to Eu3+ occurred because the emission energy of Tb3+ matched well with the absorption energy of Eu3+. As a result, the synthesized Tb-GMP-Eu CPNs exhibited the characteristic red emission of Eu3+ when excited at 290 nm. When ALP was introduced into the Tb-GMP-Eu CPNs system, it would destruct the combination between Tb and GMP by a dephosphorylation process, resulting in interruption of energy transfer from Tb3+ to Eu3+ and therefore the fluorescence quenching of Eu3+. Based on these facts, a fluorescence assay based on bimetallic lanthanide coordination polymer nanoparticles for ALP detection was developed. Such a Tb-GMP-Eu CPNs sensor exhibited sensitive response to ALP with a detection limit down to 0.004 U L−1. Moreover, the successful application of ALP inhibitor evaluation and determination of ALP in serum samples have been demonstrated. Therefore, the proposed method has great potential application for ALP detection in biological and clinical diagnosis.
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ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Dan Wu,Xia Xin,Xuehui Pang,Marek Pietraszkiewicz,Robert Hozyst,Xian′ge Sun,Qin Wei
A novel electrochemiluminescent (ECL) aptasensor was proposed for the determination of thrombin (TB) using exonuclease-catalyzed target recycling and hybridization chain reaction (HCR) to amplify the signal. The capture probe was immobilized on an Au-GS-modified electrode through a Au–S bond. Subsequently, the hybrid between the capture probe and the complementary thrombin binding aptamer (TBA) was aimed at obtaining double-stranded DNA (dsDNA). The interaction between TB and its aptamer led to the dissociation of dsDNA because TB has a higher affinity to TBA than the complementary strands. In the presence of exonuclease, aptamer was selectively digested and TB could be released for target recycling. Extended dsDNA was formed through HCR of the capture probe and two hairpin DNA strands (NH2-DNA1 and NH2-DNA1). Then, numerous europium multiwalled carbon nanotubes (Eu-MWCNTs) could be introduced through amidation reaction between NH2-terminated DNA strands and carboxyl groups on the Eu-MWCNTs, resulting in an increased ECL signal. The multiple amplification strategies, including the amplification of analyte recycling and HCR, and high ECL efficiency of Eu-MWCNTs lead to a wide linear range (1.0 × 10–12–5.0 × 10–9 mol/L) and a low detection limit (0.23 pmol/L). The method was applied to serum sample analysis with satisfactory results.
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Journal of Materials Chemistry B
·
2015
·Vol. 4
·期 6
·1100-1107
·
IF 4.726
Ruiqing Liu,Shuang Liang,Cun Jiang,Li Zhang,Tianmeng Yuan,Penghui Li,Zushun Xu,Haibo Xu,Paul K. Chu
Smart polymeric particles possessing the advantages of paramagnetism, luminescence, and controlled drug delivery in a single entity are reported. Gadolinium oxide and europium-encapsulated temperature/pH-responsive polymeric particles (PLTPPs) synthesized by emulsifier-free emulsion polymerization show good biocompatibility with C6 cells and anticancer drug (doxorubicin, DOX) loading capability. In vitro drug release assessment discloses release abatement under acidic conditions or at high temperature, and the DOX-loaded PLTPPs have obvious antitumor properties for C6 and H22 cells. Cellular uptake tests confirm that the materials can be taken up by C6 cells thereby facilitating optical imaging. The T1-weighted relaxivity value at 3 T is 6.13 mM−1 s−1 which is 39% higher than that of the clinical Magnevist®. In vivo MR and optical imaging reveal that the PLTPPs are effective dual probes. The results indicate that the PLTPPs have great potential in tumor diagnosis and treatment.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2017
·
IF 4.9
Xiude Hua,Yuan Ding,Jiachuan Yang,Ming Ma,Haiyan Shi,Minghua Wang
A direct quantum dots-based fluoroimmunoassay (QDFIA) and a time-resolved fluoroimmunoassay (TRFIA) for imidaclothiz (IMI) were developed by using the quantum dots (QDs)-labeled antibody and the europium (Eu 3 + )-labeled antibody, respectively. After optimization, the half-maximal inhibition concentration (IC 50 ) and the limit of detection (LOD, IC 10 ) are 20.41 and 0.52 μg L − 1 for the QDFIA, while 6.91 and 0.018 μg L − 1 for the TRFIA, respectively. The cross-reactivities (CRs) with the analogues are negligible except for imidacloprid with CRs of 29.0% for the QDFIA and 26.6% for the TRFIA. The spiked recoveries of IMI in paddy water, soil, pear, tomato, rice, apple, cabbage and cucumber are 72.7–117.6% with a standard deviation (RSD) of 2.4– 13.5% for the QDFIA, and 81.3–117.7% with a RSD of 1.6– 7.5% for TRFIA. The detection results of the analyses for the real paddy water and pear samples are markedly correlated with these of high-performance liquid chromatography (HPLC).
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