SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Yang Li,Jia-Jia Li,Qing Zhang,Jian-Yong Zhang,Na Zhang,Yong-Zheng Fang,Jinwu Yan,Qinfei Ke
The highly emissive BODIPY (boron-dipyrromethene) have been grafted on the Eu-based metal-organic frameworks (Eu-MOFs) via the covalent F-B bonding using a facile one-pot solvothermal reaction. The fluorescence emission ratio of [email protected] has been applied to construct the ratiometric fluorescence sensor for the F - , H 2 O 2 and glucose detection in water solution and living cells. The produced [email protected] probe provided enhanced sensitivity, higher selectivity and lower lower limits of detection (LOD) for the detection of F - (0.1737 μM), H 2 O 2 (6.22 nM) and glucose (6.92 nM), and 5.96, 6.52 and 6.95 times lower than that for single Eu-MOF, respectively. More importantly, the probe also exhibited the lower biotoxic in living cells for bioimaging and the better visualization performance with multiplex channels. The results indicated the π-conjugated BODIPY derivative not only acted as the surfactant molecule or template agent for preferred growth, but also modulated the fluorescent emissions drastically, and thus induced excellent fluorescent detecting performances.
研究领域:
纳米技术
·
分析化学
·
生物医学工程
·
生物化学
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DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2023
·Vol. 129
·期 11
·1-8
·
IF 2.7
Wang Dongyang,Zou Wenhua,Chen Yexin,Duan Junhong
In this work, different percentages of Eu-doped TiO 2 nanoparticles were synthesized by sol–gel method. The bandgap and conduction band minimum (CBM) of TiO 2 nanoparticles doped by 0.075 at% Eu element is reduced from 3.43 and – 3.93 eV to 3.09 and – 4.25 eV, respectively, deduced from the results of ultraviolet–visible (UV–Vis) absorption spectroscopy and ultraviolet photoelectron spectroscopy (UPS) measurement compared with un-doped TiO 2 . As the increase of Eu concentration, short-circuit photocurrent density J sc of CdSe quantum dot-sensitized solar cells (QDSCs) increases from 10.86 to 13.86 mA/cm 2 , while open-circuit voltage V oc is almost invariable. Optimal power conversion efficiency (PCE) of 4.03% is achieved for CdSe QDSCs with 0.075 at% Eu-doped TiO 2 film. Compared with un-doped devices, the decrease of the chemical capacitance C μ and the increase of recombination resistance R rec of QDSCs based on the 0.075 at% Eu-doped TiO 2 photoanodes can facilitate charge extraction and suppress charge recombination at the TiO 2 /electrolyte interface.
研究领域:
光伏技术
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纳米材料
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半导体物理
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材料科学
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可再生能源
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Jiayu Zheng,Longxiao Zhou,Qiufen Liu,Senwei Wu,Yuting Peng,Xiujian Zhao,Shouqin Tian
Ratiometric optical thermometry has emerged as a vital platform for non-contact temperature monitoring in industrial and scientific applications, demanding sensors with high sensitivity, non-invasiveness, and spatial resolution. Although zeolitic imidazolate framework-8 (ZIF-8) possesses attractive thermal stability and structural tunability, its limited luminescence intensity hinders practical thermometric applications. Meanwhile, ZIF-L, a two-dimensional (2D) polymorph of ZIF-8 with identical ligands, remains unexplored for temperature sensing. Herein, we propose a dual-modulation strategy synergizing lanthanide valence engineering with MOF phase control to develop a multi-emission center Eu3+/Eu2+ co-doped ZIF-L film (Eu/ZIF-L). By introducing Eu3+ into ZIF-8 precursors, the partial reduction of Eu3+ to Eu2+ under thermal treatment triggers a structural evolution from 3D ZIF-8 to 2D ZIF-L. The resultant Eu/ZIF-L exhibits dual emission peaks at 450 nm (Eu2+) and 495 nm (ligand-centered), with their intensity ratio (I495/I450) demonstrating remarkable linear temperature dependence over 296–373 K and achieving a relative sensitivity of 1.95% K−1. This work pioneers the integration of valence-state manipulation and MOF phase transition for thermometric optimization, providing a novel paradigm to design advanced ratiometric MOF thermometers for industrial thermal management.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Jun Yao,Zhuang Xie,Xiang Zeng,Li Wang,Tingting Yue
Cholesterol is one of the most significant indicators to assess health status. Lanthanide metal-organic frameworks (Ln-MOFs) have a unique luminescence mechanism, which makes it possess tremendous potential in biomonitoring. Thus, on the basic of intramolecular charge transfer theory and quenching effect, the metal-organic frameworks (MOFs) doped by europium was constructed to respond to the cholesterol in serum. The charge transfer direction and the sensing mechanism of fluorescent probe were explained in detail by cross-corroboration of experiment and calculation. The possible sensing mechanism was explained at the molecular level with density functional theory (DFT). With the excitation of 350 nm, the emission peaks at 458 nm and 615 nm which corrsponded to MIL-53(Fe) and Eu centers, appeared enhancement and quenching respectively. To investigate the emission law, the density of states and partial density of states were used to explain the internal electron migration of the probe and the possible sensing mechanism. The results showed the electron transfer efficiency of MIL-53(Fe) was enhanced after Eu 3+ doping, which brought a remarkable improvement in response sensitivity. Meanwhile, the higher energy possessed by the excited state of Eu will lead to the capture of its own electrons by hydrogen peroxide, thus reducing the number of electrons returned to the ground states of Eu and eventually leading to the fluorescence quenching of 615 nm. We anticipate the proposed research is to be an emerging method in cholesterol determination and have further development in all walks of life.
研究领域:
生物化学
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材料科学
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分析化学
·
计算化学
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DOI
高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2025
·
IF 1.6
ShaoJie Hong,Bin Guo,XiangQian Ren,Yang Cao,XiuMin Xu,Xingfu Zhou
The practical application of conventional Ti/SnO 2 -Sb electrodes is hindered by their low oxygen evolution potential (OEP) and rapid deactivation. Rare earth doping has been proposed to enhance electrode stability and catalytic activity; however, the comparative effects of different rare earth elements (e.g., La vs. Eu) on both structural and electrochemical properties remain unclear. In this paper, the fabrication of lanthanum- and europium-doped Ti/SnO 2 -Sb (TSS) electrodes and the electrochemical degradation of methylene blue (MB) were investigated. Although both lanthanum (La) and europium (Eu) are rare earth elements with many similarities, lanthanum (La)-modified electrode exhibits distinct performance characteristics. It is indicated that the Ti/SnO 2 -Sb-La (TSSL) electrode has a comparatively better crystal phase, enhanced surface hydrophobicity, and better electrochemical performance. The TSSL electrode exhibits a higher OEP of 1.84 V than other electrodes, showing a 0.15 V increase when compared with the undoped electrode. The peak oxidation current reaches 0.82 mA/cm 2 , which provides more active sites for the catalytic reaction. It is found that the La-doped electrode has better performance in wastewater treatment; the TSSL electrode shows a 45% increase in degradation efficiency when compared with the Ti/SnO 2 -Sb-Eu (TSSE) electrode for treatment of 50 ppm MB in 25 min. Moreover, the effects of current density and the initial concentration of MB were also investigated. Considering the degradation rate and energy consumption, the optimum current density for wastewater treatment is 20 mA/cm 2 . The outcome indicated that the degradation of MB was up to 98.5% in 25 min.
研究领域:
电化学
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环境工程
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材料科学
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水处理技术
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DOI
高影响因子
ACS Applied Optical Materials
·
2023
·
IF 0
Xiaoya Bu,Yan-gai Liu,Ci’an Xie,Baochen Wang
The long-afterglow luminescent material Sr2MgSi2O7:(Eu, Dy) was combined with the photocatalytic material g-C3N4 to construct a type of Sr2MgSi2O7:(Eu, Dy)/g-C3N4 self-luminous photocatalytic composite. This overcomes the limitation that photocatalytic experiments can only be carried out under an external light source, and it provides a more flexible way to use photocatalytic technology in environmental purification. The morphology, structure, luminescence, and photocatalytic properties of the samples were investigated using a variety of advanced characterization techniques. The results show that the significant improvement in the photocatalytic performance is attributed to the formation of a Z-scheme heterojunction between the luminescent and photocatalytic materials and the promotion of the photocatalytic reaction by the properties of the long-afterglow luminescent material itself. A possible mechanism for the photocatalytic process of the composite is proposed, and it is speculated that the reason for the increased photocatalytic activity is internal electron transfer and electron–hole pair separation based on tests such as X-ray photoelectron spectroscopy and density functional theory calculations. This study provides a strategy for enhancing the photocatalytic activity of photocatalysts and achieving round-the-clock degradation of pollutants.
研究领域:
材料科学
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环境净化
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光催化
·
纳米技术
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DOI
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Xuequan Jing,Meina Guo,Jiarong Li,Wei Xu,Haonan Qin,Weidong Xiao,Yinhua Wan,Jieliang Chen,Zhangwei Yao,Weijie Song,Hongdong Yu,Kang Hu,Tinggang Li
The overuse of quinolone antibiotics has led to a series of health and environmental issues. Herein, we combine the distinct luminescence properties of Eu 3+ with the unique structure of covalent organic frameworks (COFs) to develop a precise and sensitive fluorescent probe for detecting Flumequine (Flu) in water. Eu 3+ is thoroughly anchored into the channels of COFs as recognition sites, while the synthesized probe material still maintains its intact framework structure. The unique structure of COFs provides excellent support and protection for Eu 3+ . Therefore, COF-Eu can rapidly bind with Flu which can transfer the absorbed energy to Eu 3+ through an “antenna effect”, resulting in red fluorescence. Moreover, there is a good linear relationship between Flu concentration in the range of 0–30 µM, with a detection limit of 41 nM. Simultaneously, the material maintains remarkable reproducibility, with its performance remaining almost unchanged after five cycles of use. Remarkably, the probe demonstrates excellent Flu recovery rates in real samples. This study provides a viable approach for the recognition of flumequine in the environment through a customized fluorescence detection method.
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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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 35
·期 2
·2412480
·
IF 18.5
Ming Zhao,Yeping Ge,Yurong Li,Xiaoyan Song,Xinping Zhang
The advancement of Eu 2+ -activated luminescent materials tailored to exhibit a range of properties is crucial for addressing the specific demands of various application fields. However, the lack of suitable lattice sites in numerous compounds for stable Eu 2+ incorporation restricts their potential for diverse optical properties. Herein, a facile strategy of carbon and hydrogen coreduction utilizing graphite crucibles is proposed to effectively achieve the impressive luminescence of Eu 2+ at trivalent Y sites in Rb 3 Y(PO 4 ) 2 :Eu phosphors. Rb 3 Y(PO 4 ) 2 :Eu exhibits blue-violet emission when Eu 2+ predominantly occupies the Rb1 and Rb2 sites. Inspiringly, by facilitating the reduction of more Eu 3+ to Eu 2+ , a yellow emission band at 550 nm arising from Eu 2+ at Y sites emerges, enabling the realization of single-component white-emitting and yellow-emitting Rb 3 Y(PO 4 ) 2 :Eu phosphors. The diverse luminescent properties of Rb 3 Y(PO 4 ) 2 :Eu expand its potential applications in different white light source devices and optical thermometry. This work presents an innovative synthetic strategy to develop remarkable Eu 2+ luminescence at trivalent cation sites, thereby broadening the optical properties of the material and enabling multifunctional applications.
研究领域:
材料科学
·
发光材料
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固态化学
·
光学性质
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荧光粉技术
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DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 17
·3495
·
IF 4.6
Yanshuo Han,Yucheng Li,Xue Yang,Yibo Hu,Yuandong Ning,Meng Gu,Guibin Zhai,Sihan Yang,Jingkun Chen,Naixin Li,Kuan Ren,Jingtai Zhao,Qianli Li
Lanthanide-doped inorganic luminescent materials have been extensively studied and applied in X-ray detection and imaging, anti-counterfeiting, and optical information storage. However, many reported rare-earth-based luminescent materials show only single-mode optical responses, which limits their applications in complex scenarios. Here, we report a novel Na3KMg7(PO4)6:Eu phosphor synthesized by a simple high-temperature solid-state method. The multi-color luminescence of Eu2+and Eu3+ions in a single matrix of Na3KMg7(PO4)6:Eu, known as radio-photoluminescence, is achieved through X-ray-induced ion reduction. It demonstrated a good linear response (R2= 0.9897) and stable signal storage (storage days > 50 days) over a wide range of X-ray doses (maximum dose > 200 Gy). In addition, after X-ray irradiation, this material exhibits photochromic properties ranging from white to brown in a bright field and shows remarkable bleaching and recovery capabilities under 254 nm ultraviolet light or thermal stimulation. This dual-modal luminescent phosphor Na3KMg7(PO4)6:Eu, which combines photochromism and radio-photoluminescence, presents a dual-mode X-ray detection and imaging strategy and offers a comprehensive and novel solution for applications in anti-counterfeiting and optical information encryption.
研究领域:
材料科学
·
光电子学
·
辐射探测
·
信息加密
·
发光材料
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DOI
PubMed
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Jian Gou,Yousong Hu,Luxin Xing,Jun Xu,Fengzhi Yue,Lina Zhang,Lei Jia
Traditional luminescent materials for anti-counterfeiting usually adopt encryption of low-level systems with limited security, which seriously hinders their application in preventing counterfeiting and information leakage. Therefore, it is urgent to develop materials for higher-level anti-counterfeiting. In this work, a stimulus-responsive intelligent luminescent material (AC@CDs-Eu-MOFs) was prepared by co-loading green-fluorescence CDs and red-fluorescence Eu-MOFs on Amino clay (AC). 5D security barcodes, which were easy to observe while difficult to clone, were ulteriorly designed based on the nanocomposite owing to the tunable fluorescence by optical stimulation and chemical stimulus. Owing to the large capacity, low cost, and easy authentication, the 5D security barcodes possess enormous potential in optical data storage and multi-dimensional information encryption. In addition, the chemical stimulus-response enables the nanocomposite achievable in detection of Cu 2+ and Bacillus anthracis. Particularly, quantitative determination of copper in environmental water samples could be realized with a detection limit as low as 10.67 nM. Therefore, the material shows potential for detection of environmental pollutants besides advanced anti-counterfeiting.
研究领域:
材料科学
·
纳米技术
·
环境科学
·
生物技术
·
光学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 27
·13129-13136
·
IF 3.925
Ping Zhang,Xianliang Li,Yan Xu
Excessive use of tetracycline (TC) exacerbates environmental pollution and seriously threatens human health. Therefore, it is of great significance to explore an effective approach for detecting TC. In this work, a water-stable and ratiometric luminescent sensor based on a dual-emitting Eu-based metal–organic framework (Eu-TCPE, H4TCPE = tetrakis(4-carboxyphenyl)ethylene) was established through a solvothermal method. Benefiting from the luminescence quenching behavior of H4TCPE linkers through the inner filter effect (IFE) and the enhanced fluorescence emission of Eu3+via the antenna effect, supported by the results of UV-vis absorption spectra and density functional theory (DFT) calculations, the Eu-TCPE sensor exhibited a fast and selective response towards TC detection with a low detection limit of 14 nM in a linear range of 0–50 µM. Application of the Eu-TCPE sensor in real samples of tap water and milk was also investigated. Furthermore, a test-strip-based sensor with the Eu-TCPE probe fixed on the surface was developed for the real-time selective detection of TC in aqueous solution, and the fluorescence color changes of the test strip under UV-light excitation can be captured using the portable online analyzer of a smartphone-color detector App, which showed a handheld platform for the rapid and visual detection of TC in practical applications.
研究领域:
环境科学
·
分析化学
·
材料科学
·
生物技术
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DOI
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 10
·1-8
·
IF 5.705
Pang Jiawei,Lu Yuexiang,Gao Xinyu,Song Panshu,Yang Fengyi,Liu Yueying
A selective phosphorescent on-off-on probe with long decay lifetime has been designed for the detection of pyrophosphate ions (PPi). The detection scheme is based on the use of europium(III)-modulated Mn(II)-doped ZnS quantum dots capped with N-acetyl-L-cysteine. Both the aggregation of quantum dots and electron transfer induced by Eu(III) ions cause phosphorescence to be quenched (“off” state). Phosphorescence is, however, restored on addition of PPi to the system (“on” state). The effect is attributed to the removal of Eu(III) from the carboxy groups on the surface of the quantum dots owing to the stronger interaction between PPi and Eu(III). A linear relationship exists between phosphorescence intensity (best measured at excitation/emission wavelengths of 316/594 nm) and PPi concentration in the 400 nM to 6000 nM with a detection limit of 145 nM. An additional attractive feature is provided by the long-lived phosphorescence (1920 μs) of the quantum dots. It can be used to eliminate interference by short-lived fluorescence in biological samples by performing time resolved measurements. The probe was applied to the determination of PPi in spiked in urine samples and gave recoveries in the range from 98 to 105% with RSDs of <2.0%.
Schematic of a long-lived phosphorescent on-off-on probe for the sensitive and selective detection of pyrophosphate ions (PPi). It is based on the use of Eu(III)-modulated Mn(II)-doped ZnS quantum dots (QDs). Phosphorescence is quenched of QDs after the addition of Eu 3+ but restored after the addition of PPi.
研究领域:
分析化学
·
材料科学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
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