INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Tingting Chu,Pengyu Hu,Yunchuan Dai,Yanzhu Guo
Tetracyclines (TC) is one type of widely used antibiotics and its persistent residues in aquaculture or excessive intake have caused serious threats to the environment and human health. Therefore, it is urgent need and vital to fabricate simple, feasible and accurate methods to monitor TC. In this work, corncobs cellulose, one type of agricultural waste, was chosen as raw material to prepare fluorescence nitrogen-doped carbon dots (N-CDs) through the hydrothermal method. The corncobs cellulose was firstly treated in the HNO 3 /H 3 PO 4 /NaNO 2 oxidants in order to improve its water dispersibility and active groups amounts, which was effectively in enhancing quantum yields of N-CDs up to 41.69 %. The blue fluorescent light of N-CDs at 468 nm was quenched by the TC, whereas the red fluorescence of europium ion (Eu 3+ ) at 615 nm was sensitized via its coordination with TC. Based on this reverse response, a ratiometric fluorescence probe was established by integrating the N-CDs with Eu 3+ . The probe displayed outstanding sensitivity and selectivity in recognition of TC, whose limit of detection (LOD) value was 0.15 μM in a wide linear range of 0–60 μM. Furthermore, it could be observed the fluorescence color changes from blue to red through the naked eyes, and thus a smartphone-assisted assay was successfully set up by establishing the relationships between the fluorescence color variations and the TC concentrations using the color acquisition software on smartphone. The results in the manuscript were not only beneficial for opening ways for high-value utilization of agricultural waste, but also gave insights on developing on-site and portable methods for visual monitoring TC in real samples.
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高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Huifang Wu,Yubing Chen,Mengqi Xu,Yuwei Ling,Shiying Ju,Yanfeng Tang,Changlun Tong
Tetracyclines residues, particularly oxytetracycline (OTC) and tetracycline (TC), have raised extensive concern because of their serious adverse effects on human health. Herein, a dual-response fluorescent probe based on nitrogen-doped carbon dots (N-CDs) and Eu 3+ hybrid (N-CDs–Eu 3+ ) was developed to selectively determine OTC and TC. The N-CDs act as ancillary ligands of Eu 3+ and recognition units of OTC/TC, while the Eu 3+ ions chelated with N-CDs can also specifically recognize OTC/TC. Upon inclusion of OTC/TC, an enhancement in Eu 3+ emission occurs due to the energy transfer from OTC/TC to Eu 3+ and the efficient elimination of quenching effect caused by H 2 O molecule, which is attributed to the incorporation of N-CDs; while the blue fluorescence emitted by the N-CDs decreases under the inner filter effect and static quenching effect caused by OTC/TC. Based on the double and reverse response signals, the ratiometric detection of OTC and TC in the range of 0.1–45 μΜ and 0.1–30 μΜ is achieved with a detection limit of 0.017 and 0.041 μM, respectively. In addition, the noticeable variation in fluorescence color of the probe is integrated with a smartphone-assisted analysis device for the rapid on-site quantitative assay of OTC, where the detection limit is 0.15 μΜ. The results show that this probe performs with excellent specificity and anti-interference for both OTC and TC, and satisfactory detection results are obtained in lake water, milk, and honey samples, thereby confirming that the probe exhibits promising application in food safety and environmental monitoring.
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PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Jie Zhang,Xibin Zhou,Jun Wang,Dawei Fang
In this work, a novel Eu 3+ -DTPA-bis(AMC) complex with red luminescence was designed and synthesized for sequential detection of Cu 2+ and biothiols (Cys/Hcy/GSH) based on the displacement strategy with the good selectivity, high sensitivity, and large Stokes shift (288 nm). The possible detection mechanism was verified by UV–vis, the high-resolution mass spectrometry, and the fluorescence decay curve. The experimental parameters, including the solution pH, the incubation time, the concentration ratio of Eu 3+ -DTPA-bis(AMC) to Cu 2+ and biothiols concentration, were optimized. Under the optimal conditions, it shows a good linear relationship between the concentration (0–10 μM) of Cu 2+ and the fluorescence intensity of Eu 3+ -DTPA-bis(AMC), with a low detection limit of 0.065 μM. The linear range and the limit of detection of the Eu 3+ -DTPA-bis(AMC)/Cu 2+ system for Cys/Hcy/GSH were 2.5–22.5/5–45/5–50 μM and 0.11/0.07/0.05 μM, respectively. Surprisingly, the high or low concentration of Eu 3+ -DTPA-bis(AMC)/Cu 2+ can significantly affect the selectivity of the sensing system to biothiols (Cys/GSH/Hcy). When the concentration of the Eu 3+ -DTPA-bis(AMC)/Cu 2+ system is 10.0 μΜ, it could recognize biothiols (Cys/GSH/Hcy) from other substances, but when the concentration is as low as 3.3 μM, it could further specifically distinguished Cys from Hcy/GSH. Owing to the high anti-interference characteristics, accuracy and specificity, the sensing system was well applied to the cascade detection of Cu 2+ in actual environmental samples and Cys in biological and food samples, including FBS, urine, milk, beverage, fresh juice with the satisfactory recoveries from 96.20 to 106.80 %.
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PubMed
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Shengnan Yin,Changlun Tong
Detection of Bacillus anthracis spores is of great importance for biosecurity and prevention of disease outbreaks. In this paper, a ratiometric colorimetric and fluorescent dual-mode platform for rapid, sensitive, and visual detection of dipicolinic acid (DPA), a biomarker of anthrax spores, was developed based on Eu3+-modified silver nanoparticles (AgNPs). Eu3+-modified AgNPs can induce the aggregation of AgNPs, its localized surface plasmon resonance (LSPR) absorption at 392 nm is decreased, and a new absorption peak at 524 nm emerged. Interestingly, upon the addition of DPA, it can effectively inhibit the aggregation of AgNPs–Eu3+, and the solution color changes from pink to yellow, while the red characteristic fluorescence of Eu3+ is turned on owing to the energy transfer from DPA to Eu3+ by the antenna effect. A new insight that AgNPs can also enhance the fluorescence of Eu3+ was found. Eu3+-modified AgNPs as a dual-mode platform for ratiometric colorimetric and fluorescence detection of DPA were thus fabricated. The good linearity is in the range of 1.0–25 μM with a LOD of 0.31 μM for the ratiometric colorimetric assay and 0.25–45 μM with a LOD of 17 nM for the fluorescent assay, which is greatly lower than the dose of DPA (60 μM) released by the contagious number of spores to cause anthrax. The ratiometric colorimetric and fluorescent probes were successfully applied for the detection of DPA in lake waters and Bacillus subtilis, and as low as 1.8 × 104 spores were detected.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 20
·9658-9665
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IF 3.925
Bo Song,Mengyan Li,Junyu Ren,Qi Liu,Xinyi Wen,Wenzhu Zhang,Jingli Yuan
The combination of complementary optical imaging and magnetic resonance imaging (MRI) techniques evolved to provide an even more powerful tool to simultaneously obtain both molecular information and anatomical information as well as to dramatically improve the accuracy of detection. Herein, we report a new tumor-targetable bimodal time-gated luminescence (TGL)–MRI nanoprobe for tracing cancer cells in vitro and in vivo. The nanoprobe was constructed by coating superparamagnetic Fe3O4 nanoparticles with functional silica shells that encapsulated luminescent Eu3+ complexes and were decorated with tumor-targeting molecules, folic acid (FA), on the surface. The fabricated nanoprobe possesses strong long-lived luminescence and excellent magnetic properties, as well as outstanding stability, biocompatibility and dispersibility in water. Furthermore, the nanoprobe can specifically bind to FA receptor-overexpressed cancer cells, allowing it to be accumulated in these cells. These features enable the nanoprobe to be successfully used for TGL imaging of cultured cancer cells and bimodal TGL–MR imaging of tumors in tumor-bearing mice with high sensitivity and accuracy. The research outcomes will contribute to the development of a new bimodal optical/MR imaging nanoprobe for the tracing and precise detection of cancerous cells.
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高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Xinhang Cong,Jingjing Han,Jing Cuan,Zixian Wu,Shihao Zhu,Qiuping Li,You Zhou
Residual antibiotic tetracycline (TC) that is hard to degrade and active has adversely affected public health and ecosystems. Therefore, developing straightforward, rapid, and sensitive probes for TC detection is highly desirable. Herein, we present a facile yet versatile strategy to design and fabricate luminescence turn-on TC sensors by applying the concept of indicator displacement to metal–organic frameworks (MOFs). It is illustrated by an elaborated dual-emitting nanoporous europium–MOF (Eu–MOF) constructed by Eu3+ cations and 2-aminoterephthalic acid (BDC-NH2), in which the former serves as receptors and the latter acts as luminescent indicators. The indicator displacement is based on the competitive interactions within Eu–MOF, which is confirmed by high-resolution mass spectrometry, photoluminescence, and UV–vis spectroscopy. Once Eu–MOF contacts TC, the competitive coordination effect induces the release of BDC-NH2 molecules and the accompanying turn-on blue emission, whereas the red emission of Eu3+ barely changes, thereby resulting in a remarkable ratiometric luminescence response and luminescence color switching from red to blue that is readily observed by the naked eye. The sensitive and quantitative determination of TC is accomplished through multiple readouts involving ratiometric emission intensity and emission color, exhibiting detection limits of 0.08 and 0.95 μM, respectively. Notably, the visual detection of TC is achieved using a smartphone color-scanning app. Considering the excellent tunability in the composition and structure of MOFs and their compatibility with various host–guest interactions applicable to indicator displacement assays, this study helps to create a universal avenue for leveraging MOFs in constructing luminescence turn-on sensors.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
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IF 3.359
Zhipeng Wang,Songdong Ding,Xiaoyang Hu,Shimeng Li,Dongping Su,Lirong Zhang,Ying Liu,Yongdong Jin
A novel water-soluble ligand of N,N,N‴,N‴ -tetraethyl- N ′ ,N ″-ethidene bisdiglycolamide (TEE-BisDGA) was synthesized and used as a masking agent for selective extraction of Am(III) over Eu(III) from HNO 3 solution by N,N,N ′, N ′ ,N ″ ,N ″-hexaoctylnitrilotriacetamide (NTAamide(C8)) in kerosene. Influences of acidity, concentration of water-soluble ligands and extractant as well as nitrate ions on the distribution ratios ( D ) and separation factors ( SF ) of Am(III) and Eu(III) were investigated. In the range of examined acidity from 0.001 to 0.2 mol/L, D Am and D Eu decreased with the increase of HNO 3 concentration. Using 0.1 mol/L NTAamide(C8) as an extractant, the maximum SF Am/Eu of 26 can be obtained in the presence of 0.01 mol/L TEE-BisDGA in aqueous phase with pH of 3.0, which was significantly higher than that case with no TEE-BisDGA. Job's method and mole ratio method were employed for extraction mechanism research. It has been shown that Am(III) and Eu(III) formed di-solvated species with TEE-BisDGA and mono-solvated species with NTAamide(C8), respectively. Moreover, the stability constants logβ values were obtained from UV–vis adsorption spectroscopic titration for Nd(III) complexes with TEE-BisDGA and N,N,N ′ ,N ′-tetraethyldiglycolamide (TEDGA), which indicated that TEDGA had a stronger complex ability than TEE-BisDGA.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 6
·125225
·
IF 7.5
Xianhong Zhao,Pengfei Zong,Yifan Wang,Yuhao Wu,Chengxuan Song,Shoufang Wang,Hangzhou Zhang
Recyclable LZPS hydrogel microspheres were successfully synthesized. • LZPS microspheres revealed remarkable adsorption capacity towards Eu(III) and Pb(II). • LZPS microspheres displayed excellent stability in removal of Eu(III) and Pb(II). • Long-term field studies on Eu(III) and Pb(II) behaviors in medium were required. • Multicomponent synergy enhanced adsorption capacity and ion selectivity. With the fast growth of the nuclear industry and application of radioisotopes, the pollution of aquatic environments with radionuclides and heavy metals has become increasingly severe. Thus, there is a pressing demand to develop novel adsorbent materials with high efficiency, high selectivity, and good recyclability. Herein, a novel zinc-aluminum layered double hydroxide/zeolitic imidazolate framework-67 integrated with polydopamine functionalized sodium alginate hydrogel microsphere (Zn Al-LDH/ZIF-67/PDA/SA, denoted as LZPS), was successfully synthesized to achieve the efficient enrichment of Eu(Ⅲ) and Pb(Ⅱ). As revealed by characterization measurements, the hydrogel microsphere was successfully constructed with abundant surface functional groups contributing to the prominent adsorption behavior of the adsorbent. The impact of diverse environmental factors on the adsorption behavior of LZPS for Eu(Ⅲ) and Pb(Ⅱ) in wastewater was systematically examined through macroscopic experiments. The experimental conclusions demonstrated that LZPS exhibited excellent adsorption capability toward Eu(Ⅲ) and Pb(Ⅱ). Adsorption equilibrium for Eu(Ⅲ) and Pb(Ⅱ) was attained within 150 min, and the pseudo-second-order model offered a satisfactory description of the adsorption kinetic data. At 303 K, the maximum adsorption capacity of Eu(Ⅲ) and Pb(Ⅱ) using Langmuir model was 2.10 × 10 −3 mol/g and 9.28 × 10 −4 mol/g, respectively. It was confirmed by XPS analysis that Eu(Ⅲ) and Pb(Ⅱ) adsorption on LZPS was predominantly driven by electrostatic interaction, ion exchange, surface complexation, and reduction reaction. Overall, the LZPS hydrogel microsphere was possessed significant application prospects and potential practical value for the efficient treatment of Eu(Ⅲ) and Pb(Ⅱ) in nuclear wastewater. Download: Download high-res image (236KB) Download: Download full-size image
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高影响因子
Polymer Chemistry
·
2015
·Vol. 7
·期 5
·1147-1157
·
IF 5.52
Chaolong Yang,Shaojun Liu,Jing Xu,Youbing Li,Mingyong Shang,Lei Lei,Guoxia Wang,Jian He,Xuanlun Wang,Mangeng Lu
A novel efficient antenna Eu-complex Eu(TTA)2Tpy-OCH3·2H2O, based on the terpyridyl derivative 4′-(4-methoxyphenyl)-2,2′:6′,2′′-terpyridine(Tpy-OCH3) as the ancillary ligand, has been synthesized, structurally characterized, and its photophysical properties have been examined. Upon irradiation at the ligand-centered band in the range of 200–450 nm, the new Eu-complex displays bright red luminescence, irrespective of the medium. A Sparkle/RM1 calculation was utilized for predicting the ground-state geometries of this complex. Theoretical Judd–Ofelt and photoluminescence parameters, including quantum efficiency, as predicted from this model are in good agreement with the experimental values, proving the efficiency of this theoretical approach as implemented in the LUMPAC software (http://lumpac.pro.br). The kinetic scheme for modelling energy transfer processes shows that the main donor state is the ligand triplet state and that energy transfer occurs on both the 5D1 (20.7%) and 5D0 (79.3%) levels. As an integral part of this work, the synthesis, characterization, and luminescence properties of poly(vinyl butyral) (PVB) polymer films doped with the Eu-complex are also reported. After the Eu-complex Eu(TTA)2Tpy-OCH3·2H2O was doped into the PVB matrix to form the films, the PVB polymer matrix, acting as a co-sensitizer for Eu3+ ions, enhances the luminescence lifetimes and quantum efficiencies of the complex in comparison with its precursor complex. The new luminescent Eu/PVB films therefore show considerable promise for polymer light-emitting diode and active polymer optical fiber applications. To the best of our knowledge, this is the first report which studies in detail the photophysical properties of doped europium fluorescent films based on PVB as the polymer matrix.
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高影响因子
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