Nanoscale Advances
·
2020
·Vol. 3
·期 2
·550-555
·
IF 0
Haoran Qin,Xinghong Gong,Zundu Luo,Yidong Huang
Monodisperse Tb-doped NaCeF4 nanocrystals were synthesized via a hydrothermal method. The morphology, and room temperature and temperature dependent luminescent properties were investigated. Excited at 254 nm, the emissions of Ce3+ at 270–370 nm and those of Tb3+ at 475–700 nm can be observed. The strongest visible emission was observed in NaCeF4:20 at% Tb with a quantum yield of 49%. The efficiency of energy transfer from Ce3+ to Tb3+ increases with the Tb3+ doping concentration and reaches 95% for NaCeF4:30 at% Tb. The ratio of Tb3+ emission to Ce3+ emission is sensitive to temperature, and the relative sensitivity was calculated to be 1.0% °C−1 at 60 °C. The mechanisms for this thermal dependence were analyzed in terms of non-radiative relaxation and energy migration.
研究领域:
材料科学
·
光学
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DOI
PubMed
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Yinggui Zhu,Min Zhao,Xiaojuan Hu,Xiaofang Wang,Ling Wang
In this paper, we report a novel rare earth metal complex with the weak ligand of aromatic sulphonic acid (pyridine-3-sulfonic acid, 3-pSO 3 H), and characterized by FT-IR, UV–vis, energy-dispersive X-ray spectroscopy (EDX), electrochemiluminescence spectra, etc. Then an excellent electrochemiluminescence (ECL) signal was observed with K 2 S 2 O 8 as the coreactant in NaAc-HAc buffer solution. For another thing, the electrochemical properties of the compound have been thoroughly investigated in acetonitrile solution, the possible ECL reaction mechanism was proposed as well. Furthermore, a simple and straightforward ECL platform was reported for sensitive and selective detection of Cd 2+ due to the effective quenching after addition of Cd 2+ . Other heavy/transition metal ions do not interfere with the sensing. The limit of detection is determined as 0.13 nM, the results suggested that as-prepared complex could be a promising material for developing ECL senors to detect the Cd 2+ rapidly indwell in environmental and practical samples.
研究领域:
分析化学
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环境科学
·
材料科学
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DOI
高影响因子
CRYSTENGCOMM
·
2012
·Vol. 15
·期 5
·1001-1006
·
IF 3.842
Miao Wang,Guoqing Jiang,Yanfeng Tang,Yujun Shi
Without any templates or surfactants, large-scale 3D persimmon-shaped hierarchical LaF3 and LaF3:Ln3+ (Ln = Eu, Tb) have been synthesized via a simple hydrothermal route using organic tetrafluroborate complexes N(C4H9)4BF4 as the fluoride source. The phase and morphology of the products have been characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and selected area electron diffraction (SAED). The SEM and TEM results indicate the 3D persimmon-shaped hierarchical microstructures are constructed by numerous nanodisks with mean thickness of 50 nm. It is found that several factors, including the fluoride sources, molar ratio of reagents and the reaction time, play crucial roles in the formation of the multilayer stacked structures. Detailed studies indicate that the layer-by-layer self-assembly of nanodisks is responsible for the formation of 3D hierarchical structures. The possible mechanism of the crystal growth and assembled procedure are also proposed. Furthermore, the photoluminescent properties of LaF3:Ln3+ (Ln = Eu, Tb) are studied, which exhibit orange-red (Eu3+:5D0–7F1,2,3,4) and green (Tb3+, 5D4–7F3,4,5,6) emission, respectively.
研究领域:
材料科学
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光学
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DOI
高影响因子
OPTICS EXPRESS
·
2021
·Vol. 29
·期 24
·39304-39311
·
IF 3.894
Yanan Liu,Yanan Liu,Nianyao Chai,Nianyao Chai,Nianyao Chai,Xuewen Wang,Xuewen Wang,Xuewen Wang,Zhijun Luo,Junjie Zhao,Junjie Zhao,Changsheng Xie,Zongsong Gan,Zongsong Gan,Zongsong Gan,Zongsong Gan
Luminescent metal-organic frameworks (LMOFs) are a class of interesting and well-investigated MOF materials, which have shown remarkable prospects in the past and have been widely applied in different fields. However, due to their organic hybrid aspect, micro-/nano-patterning LMOFs in devices via a conventional semiconductor process is very challenging. In this work, we have introduced an elegant technique via nonlinear photon-chemical effect to induce the synthesis and growth of LMOFs. A facile technique for local synthesis and micro-pattering Tb-based luminescent metal organic frameworks (Tb(BTC)·G) from a solution of precursors is achieved. A single step approach micro-patterning for device integration with simultaneous chemical synthesis was proposed. Micro-devices with excellent fluorescence performance based on Tb(BTC)·G have been demonstrated. This work first suggested a high resolution bottom-up micro-patterning technique for MOF device fabrication using femtosecond laser direct writing, showing great potential on MOF based micro/nano-devices integration, especially promising for patterning high resolution luminescent MOF devices.
研究领域:
材料科学
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光学
·
化学工程
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Zenghui Liu,Hesen Wang,Jinge Li,Mengli Wang,Huaixia Yang,Fuchun Si,Jinming Kong
As a new serum biomarker, the sensitive detection of exosomes is significant for the early diagnosis of diseases. In this paper, a novel electrochemical biosensor for the sensitive detection of exosomes was constructed utilizing a novel C 60 hybrid as a tracer. Firstly, the epidermal growth factor receptor (EGFR) antibody was immobilized on the electrode surface via Au-NH 2 bonding with Nafion AuNPs substrate. After specific capture of exosomes, C 60 -Au-Tb was grafted onto the surface of exosomes through “carboxyl-Zr 4+ -phosphate” chemistry, causing a change in the current signal. Under the optimal conditions, there was a linear relationship between the SWV signal and the logarithm of exosomes concentration from 5 × 10 4 exosomes/mL to 5 × 10 9 exosomes/mL, and the detection limit was 2.67 × 10 4 exosomes/mL. In addition, the biosensor had the advantages of high specificity, strong anti-interference ability, good repeatability, and stability. In conclusion, this method had great potential in diagnosing early cancers associated with exosomes.
研究领域:
生物传感器
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分析化学
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癌症诊断
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DOI
高影响因子
TALANTA
·
2022
·
IF 6.556
XueQin Li,Xingcen Liu,Yujie Liu,Ran Gao,Xia Wu,Xibao Gao
We developed a trace level detection method for dopamine (DA) based on the metal-enhanced fluorescence (MEF) effect of gold nanoflowers (AuNFs). AuNFs prepared were excellent enhancement fluorescence substrates due to their unique morphology with rich edges and sharp quoins. DA was the target analyte and also as a bridge reagent that could regulate the distance between AuNFs and Tb 3+ . The characteristic fluorescence of Tb 3+ was enhanced significantly through the synergistic effect between the luminescence sensitized by DA and the MEF caused by AuNFs. Under the optimum experimental conditions, the fluorescence intensity of Tb 3+ at 545 nm demonstrated very significant sensing ability against DA concentration and showed a good linear relationship in the range of 0.80–300 nM and the limit of detection was 0.21 nM ( S/N = 3). The proposed method was also validated in serum samples and the dopamine hydrochloride injection samples with satisfactory results.
研究领域:
分析化学
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生物医学工程
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纳米技术
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DOI
PubMed
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 13
·8726-8734
·
IF 3.9
Mengnan Liang,Na Li,Hao Zhang,Ling Ma,Ke Wang
A novel magnetic organic polymer Fe3O4@SiO2@Tb–PDAN was designed and synthesized, which was used as an adsorbent for magnetic solid-phase extraction (MSPE) of 16 macrolides (MALs) in water and honey. The synthesized adsorbent was characterized using techniques including scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). Then several parameters of the extraction process were further optimized. Under the optimized conditions, an MSPE-LC-MS/MS method was established for extraction and determination of 16 MALs, which showed good linearity (r ≥ 0.999), low limits of detection (0.001–0.012 μg L−1 for water and 0.001–0.367 μg kg−1 for honey) and satisfactory recoveries (70.02–118.91%) with the relative standard deviations (RSDs) lower than 10.0%. This established method was then successfully applied to detect MALs in real samples, which suggested that Fe3O4@SiO2@Tb–PDAN was a potential magnetic adsorbent for efficient extraction and analysis of MALs.
研究领域:
分析化学
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环境科学
·
食品科学
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DOI
PubMed
高影响因子
Analytical Methods
·
2019
·Vol. 12
·期 1
·91-96
·
IF 2.378
Peiyao Lv,Ying Cao,Zi Liu,Rong Wang,Baoxian Ye,Gaiping Li
In this work, we report a new fluorescence ratiometric method for Hg2+ assay based on the dual-ligand fluorescent probe GMP–Tb–luminol coordination polymers (CPs), which can be excited at the same wavelength and reveal characteristic luminescence of Tb3+ and luminol with spectrally distinguishable emission peaks. The addition of Hg2+ leads to the decrease of Tb3+ luminescence due to the higher coordination between Hg2+ and GMP, which inhibits energy transfer from GMP to Tb3+. Meanwhile, the fluorescence of luminol increases because of the aggregation-induced emission phenomenon. Therefore, a ratiometric fluorescent sensor for Hg2+ assay can be constructed by measuring the ratio of fluorescence intensity of luminol at 430 nm (I430) to that of Tb3+ at 548 nm (I548). Under the optimal conditions, the fluorescence intensity ratio I430/I548 exhibits a good linear relationship versus the concentration of Hg2+ in the range from 5 nM to 130 μM with a low detection limit of 1.3 nM. Additionally, the probe can also adsorb Hg2+ in water with high efficiency, which makes Hg2+ removal in water possible. The proposed method has been successfully used for the determination of Hg2+ in tap water, indicating its potential applications in the detection of Hg2+ pollution in environmental water.
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
高影响因子
COLLOID AND POLYMER SCIENCE
·
2014
·Vol. 292
·期 9
·2173-2183
·
IF 2.41
Guo Fengying,Li Ruiqing,Xu Jijing,Zou Lianchun,Gan Shucai
The Gd-, Tb-, and Ho-doped W-type hexagonal ferrite Ba 0.85 RE 0.15 Co 2 Fe 16 O 27 was fabricated by a facile route of low-temperature sol–gel self-propagating combustion. Furthermore, a combination of dielectric loss phase polyaniline and magnetic loss phase Ba 0.85 RE 0.15 Co 2 Fe 16 O 27 as the microwave absorber in a core-shell architecture has been synthesized. The effect of different lanthanide ions Gd, Tb, and Ho on their microstructure, static magnetic properties, electromagnetic properties, and microwave reflection loss have been systematically studied. Our results show that the Ho-doped ferrite has the low microstructure parameters ( a , c , and V ) and high saturation magnetization ( Ms ) attributed to its ionic radius and magnetic moment. Moreover, it was found that the Ho-doped composite exhibited excellent microwave absorbing property with a minimum reflection loss (RL) of about −15.1 dB at 9.4 GHz. The reflection loss of composite increases up to almost triple upon the combination of polyaniline and doped ferrite. Such lightweight and highly effective absorbers via combining the organic and inorganic phase into a core-shell architecture are highly desirable for microwave absorber in various applications.
The synthesis and properties of the PANI/REBF composites
研究领域:
材料科学
·
电磁学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Xiaoxia Mao,YanMei Chen,Caiyu Zhang,Qian Wang,Shaowei Liu,Yingchun Gao,Ye Zhu
Tb-MOFs embedded in agarose hydrogel form a flexible, anti-aggregation film for easy retrieval. • Malachite green quenches fluorescence via energy transfer, enabling visible color change within 5 min. • Integrated with a smartphone RGB colorimeter, the platform achieves 1.73 μM detection limit with reliable recovery. A flexible Tb-MOFs@agarose hydrogel film was developed as a smartphone-assisted fluorescence sensing platform for the detection of malachite green (MG). The Tb-MOFs are spatially confined within a hydrophilic agarose network, and upon MG exposure, the system exhibits a distinct ‘bright-green to dark-green’ fluorescence transition within 5 min at 60 °C (or within approximately 40 min at room temperature) via fluorescence resonance energy transfer (FRET) from Tb 3+ to MG. A Convolutional Neural Network (CNN) model was further developed to enable automated image recognition from smartphone-captured fluorescence images. Under optimized conditions (pH 6.0, 60 °C, 0.03 mg/mL Tb-MOFs), the platform shows a linear detection range of 5–140 μM with a limit of detection of 0.63 mg/L. Recoveries of 75.5–127.6% (RSD < 5.4%) were obtained in crucian carp, shrimp, and lake-water samples, with negligible interference from seven co-existing antibiotics. This simple, low-cost approach offers a practical solution for field screening of prohibited MG residues in aquatic products. Smartphone-enabled on-site detection of malachite green using a hydrogel-confined Tb-MOFs sensor. Download: Download high-res image (144KB) Download: Download full-size image
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高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 9
·e70374
·
IF 0
Quanfeng Ye,Lingyi Li,Jie Zhang,Mingyu Teng,Fengshou Wu,Deman Han
Salen-type Schiff-base ligands (H 2 L) were synthesized through the condensation reaction between 1,2-diphenylethane-1,2-diamine and o-vanillin. Three novel luminescent Zn-Ln complexes, [ZnL] 2 Ln (Ln = Gd, Tb, Eu), were successfully prepared by reacting the zinc complex (ZnL) with LnCl 3 . Subsequent treatment of [ZnL] 2 Ln with dibenzoylmethane yielded three dinuclear derivatives, β-[ZnL]Ln (Ln = Gd, Tb, Eu). All complexes were comprehensively characterized by single-crystal X-ray diffraction and FT-IR spectroscopy. Structural analyses revealed that complexes 1–3 adopt trinuclear Zn-Ln-Zn architectures, whereas complexes 4–6 exhibit dinuclear Zn-Ln configurations. Solid-state photoluminescence measurements demonstrated quantum yields of 27.94% (ZnL), 0.90% ([ZnL] 2 Eu), 1.82% ([ZnL] 2 Tb), 1.05% ([ZnL] 2 Gd), 0.65% (β-[ZnL]Eu), 1.16% (β-[ZnL]Tb), and 0.70% (β-[ZnL]Gd), indicating their potential as advanced fluorescent rare-earth materials. The LED devices based on complexes β-[ZnL]Eu and β-[ZnL]Tb exhibit stronger emission intensities compared to those based on complexes [ZnL] 2 Eu and [ZnL] 2 Tb. The obtained complexes were fabricated in LED; the CIE chromaticity coordinates of complexes β-[ZnL]Eu and β-[ZnL]Tb are (0.344, 0.316) and (0.347, 0.323), respectively, which are very close to the standard white light coordinates (0.33, 0.33).
研究领域:
无机化学
·
材料科学
·
配位化学
·
光学材料
·
固态照明
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DOI
AIP Advances
·
2024
·Vol. 14
·期 5
·
IF 1.4
Liu Peng,Ren Weijun,Guo Qing,Zhang Zhao,Zhao Xueting,Zhang Zhidong,Dai Wei,Li Bing
Cryogenic refrigeration technology based on magnetocaloric effects plays a critical role in a variety of technological applications. In this paper, we report the cryogenic magnetocaloric effects of a series of sodium-rare earth fluoride samples (Ln = Gd, Tb, Dy, Ho, Er, Tm, Yb) synthesized by the solid-state reaction method. These compounds all crystallize in a hexagonal crystal structure. Down to 2 K, no magnetic ordering was detected, while all compounds show negative Curie–Weiss temperatures indicative of strong antiferromagnetic coupling. Magnetic fields effectively suppress the magnetic fluctuations, leading to a maximum magnetic entropy change of −56 J kg −1 K −1 in NaGdF 4 at the magnetic field change from 0 to 50 kOe. These series of compounds are potentially excellent magnetic refrigerants at low temperatures.
研究领域:
物理学
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材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）