JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Lihan Chen,Yuhang Kuang,Kai Han,Zhiguo Xia
Low-dimensional hybrid metal halides have recently gained prominence as next-generation luminescent materials owing to their structural tunability, abundant spectral characters and unique emission mechanisms. Herein, we designed and synthesized three emerging zero-dimensional rare-earth Eu(II)-based hybrid bromides with cyan emission originated from 5d-4f transition of Eu(II). Their photoluminescence quantum yields (PLYQs) are enhanced by molecular-dimensionality-engineering, and the optimized (Me 4 P)EuBr 3 (Me 4 P = tetramethylphosphonium) with a high PLQY of 96.1% shows a narrow emission band peaking at 495 nm with a full width at half maxima of 45 nm upon 390 nm excitation. The as-fabricated white light-emitting diodes (WLED) device based on (Me 4 P)EuBr 3 , commercial K 2 SiF 6 :Mn 4+ and YAG:Ce 3+ , and a 460 nm blue GaN chip achieves a high color rendering index of 92.2. This work not only establishes the structural design and innovation of a new family of hybrid rare-earth halides for efficient photoluminescence, but also provides new phosphor materials for full-spectrum WLED.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Zhen-Wen Zhang,Ao-Jun Qiu,Geng-Jin-Sheng Cheng,Yu Fan,Yu Xiao,Yan-Zhu Liu,Qian-Yong Cao
Tetracycline detection remains an important research topic in the bioenvironmental field today. This paper reports a novel amphiphilic Eu(III) complex DO 3 AC 12 -Eu for single signal and ratiometric fluorescence detection of tetracycline (TC) in aqueous solution. DO 3 AC 12 -Eu can self-assemble micelle-like nano-aggregation in aqueous solution with no fluorescence. After addition of TC, the Eu(III)-based emission was observed for the effective antenna effect from TC to Eu(III) center. In addition, DO 3 AC 12 -Eu can load 4-methylumbelliferone sodium (MU) as a fluorescence reference to form DO 3 AC 12 -Eu/MU co-assembly nano-aggregation with a blue emission at 450 nm. Based on the TC-induced antenna effect and inner filter effect mechanism between TC and MU, DO 3 AC 12 -Eu/MU exhibits a ratiometrically fluorescent response toward TC, with increasing Eu(III)-based emission at 615 nm, and decreasing MU-based emission at 450 nm. Importantly, DO 3 AC 12 -Eu/MU exhibits superior sensitivity and selectivity over DO 3 AC 12 -Eu . The detection limit of DO 3 AC 12 -Eu/MU toward TC is 0.82 nM, far lower than that of DO 3 AC 12 -Eu (9.5 nM). Furthermore, DO 3 AC 12 -Eu/MU assembly has been successfully used for on-site and real-time detection of TC in food samples by using the smartphone-based visualization method and test gel.
研究领域:
分析化学
·
环境监测
·
生物环境科学
·
荧光传感技术
·
纳米科技
·
配位化学
·
食品安全检测
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PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2012
·Vol. 88
·期 4
·840-843
·
IF 2.413
Zhan Zhou,Qianming Wang,Jintai Lin,Yanna Chen,Chuqin Yang
Herein, a novel fluorescent indicator for the real-time monitoring of amines is described. This probe contains a complex of europium-(thenoyltrifluoroacetone) 3 (Eu(TTA) 3 ) that efficiently reacts with primary and secondary amines. The electron-withdrawing trifluoroacetyl undergoes a nucleophilic addition with amines, and the complex was used to selectively detect BuNH 2 and Et 2 NH (quenching concentration for BuNH 2 : 10 −4 m , for Et 2 NH: 1.2 × 10 −3 m ) by monitoring emission; no changes were observed in the emission spectrum of Eu(TTA) 3 in the presence of Et 3 N, [Bu 4 N]Cl, or PhNH 2 in aqueous solution (THF/H 2 O = 1:1). The ratio of emission intensity to amine concentration was linear by the least-squares fitting method.
研究领域:
分析化学
·
生物传感
·
分子探针
·
稀土化学
·
有机合成
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JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
·
2019
·Vol. 23
·期 06
·619-627
·
IF 1.292
Pan Chen,Ya-Fan Huang,Guang-Yu Xu,Jin-Ping Xue,Juan-Juan Chen
To improve the cancer targeting and anticancer efficacy, the multifunctional Eu-based metal-organic framework (EuBTC) is post-synthetically modified with a targeting moiety folic acid and a zinc phthalocyanine photosensitizer. In addition, this nanosphere is also applied as a drug delivery system to load the chemical drug doxorubicin. Electron microscopy, powder X-ray diffraction and infrared spectometry demonstrated the formation of these multifunctional nanospheres (DOX). Our nanospheres kept the high singlet oxygen quantum yield of zinc phthalocyanine. Additionally, Cell viability experiments demonstrated the biosafety of EuBTC and the enhanced anticancer effect of DOX@FA-EuBTC-Pc under light irradiation. In short, these well-arranged DOX@FA-Eu-BTC-Pcs exhibit as promising drug delivery systems for enhanced targeted anticancer therapy.
研究领域:
材料科学
·
纳米医学
·
癌症治疗
·
药物递送
·
光动力治疗
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 6
·2258-2272
·
IF 3.5
Luo Hanqiong,Hu Quanli,Yue Bin,Du Suxuan
Rare earth orthocobaltates nanofibers (PrCoO 3 , EuCoO 3 , and GdCoO 3 ) were prepared by a simple electrospinning method coupled with calcination. The PrCoO 3 , EuCoO 3 , and GdCoO 3 nanofibers have orthorhombic perovskite structure. The fabricated electrodes presented the typical pseudocapacitive characteristics, which originated from the reversible redox reactions of Co 2+ /Co 3+ and Fe(CN) 6 3− /Fe(CN) 6 4− . At 1 A g −1 , the specific capacitances of the PrCoO 3 , EuCoO 3 , and GdCoO 3 nanofibers were 119, 133, and 196 F g −1 , respectively. The electrochemical characteristics of the PrCoO 3 , EuCoO 3 , and GdCoO 3 nanofibers exhibited favorable specific capacitance, good long-term cycling stability, and high coulombic efficiency, proving the possible application into energy storage devices. PrCoO 3 and EuCoO 3 nanofibers exhibited a magnetic state transition from paramagnetic to antiferromagnetic state. GdCoO 3 nanofibers showed a paramagnetic ordering at high temperature. The cooperation of the R 3+ ions and the Co 2+ ions contributed to the magnetism of rare earth orthocobaltates nanofibers. The antiferromagnetic behaviors of the fabricated samples confirm the potential application into spin-electronic devices.
研究领域:
材料科学
·
电化学
·
纳米技术
·
固态物理
·
能量存储
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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
·
光学
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JOURNAL OF LUMINESCENCE
·
2018
·
IF 2.732
Xianli Lu,Dongming Cheng,Fuying Dong,Shirong Qin,Yachuan Liang,Yingjie Lu,Qian Liu,Chongxin Shan,Lin Dong
The rare-earth elements (REEs) derived phosphors play an essential role in light-emitting diodes. Many approaches have been proposed for tailoring the emission color of lamp phosphors by tuning the contents and valances of REEs (such as Ce 3+ , Tb 3+ , Eu 3+ ). As we know, the separation and purifying of REEs from waste phosphors usually requires high cost and complicated operations. Here we report the phosphor only based on Eu doped in different matrices with manipulated color for the first time, which will minimize the environmental challenges present in the transition to a green economy. The hybrid material is manufactured by mixing (SAOE) SrAl 2 O 4 :Eu 2+ and (TTAE) Eu(TTA) 3 phen (TTA = 2-thenoyltrifluoroacetone, phen = 1,10-phenanthroline) in different mass ratios. The optical properties of the resulting phosphor materials are determined by photoluminescence (PL). Eu doped in alkaline earth aluminates (SrAl 2 O 4 ) has strong green (510 nm) emission, meanwhile the Eu exhibits enhanced red (612 nm) luminescence upon bonding with TTA (thenoyltrifluoroacetone) and phen ligands. By adjusting the mass ratios of SAOE and TTAE, the emission colors of the hybrid materials can be tuned from red to green. The chromaticity coordinates are calculated, which fell well in the red, orange, yellow and green regions of 1931 CIE chromaticity diagram. According to the spectroscopic studies, the absorption almost have no overlap on the emissions of SAOE and TTAE powders, leading to efficient PL emitting with high photoluminescence quantum yields of 24–68%. Through deposition of the hybrid materials with polydimethylsiloxane (PDMS) onto the 365 nm UV-LED chip, tunable color light-emitting diodes are fabricated, they show excellent luminescence properties, indicating their potential application in optical device and offering a novel approach for designing multi-color phosphor materials.
研究领域:
材料科学
·
光学工程
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JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Jing Zhang,Bo Ye,Rong-Rong Wang,Xiao-Ma Tao,Ge-Mei Cai
The luminescence behavior of rare earth Eu as the famous fluorescent probe not only depends on its chemical valence, but also on the concentration and occupation in the lattice, except for the interaction with the host. Herein, previously reported monoclinic BaIn 2 (P 2 O 7 ) 2 (BIP) phosphate acts as the host, and part of In atoms have been experimentally designed to be replaced by Eu. The lattice occupation and luminescence behavior of Eu in BIP were discussed. In the PL spectra , the intrinsic emission of BIP and the emission of Eu 2+ were observed in addition to the characteristic emission of Eu 3+ , all of which were also emerged in the cathodoluminescence spectrum. EPR analysis confirmed the existence of Eu 2+ , that is, Eu 3+ is spontaneously reduced in the BIP lattice. The red/orange ratio of Eu 3+ characteristic emission changes with the change of concentration, indicating the evolution of lattice occupation. The charge density before and after Eu doped BIP was analyzed by DFT calculation. From the perspective of charge exchange, it was further confirmed that partially Eu 3+ was reduced to Eu 2+ at different In or Ba crystallographic sites. The present work demonstrates a unique case of mixed occupation, double valence and tunable emission of Eu in phosphate.
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JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Yuxuan Luo,Danyu Zhang,Shujun Xu,Lianjie Li,Liping Chen,Hai Guo
Herein, YNbO 4 (YNO):Bi 3+ ,Ln 3+ (Ln = Dy, Eu) phosphors were manufactured though high-temperature solid-phase reaction. Their structural properties, optical characteristics and energy transfer mechanisms (Bi 3+ →Ln 3+ ) were analyzed in detail, and their potential application in optical thermometry was explored. Under 312 nm excitation, YNO:Bi 3+ ,Ln 3+ phosphors show broad emission from Bi 3+ ions ( 3 P 1 → 1 S 0 ) and sharp peaks from 4f-4f transitions of Ln 3+ ions. YNO:Bi 3+ ,Ln 3+ samples exhibit high sensitivity and superior thermochromic properties in temperature sensing. For YNO:Bi 3+ ,Dy 3+ phosphor, the maximum absolute sensitivity ( S a ) and relative sensitivity ( S r ) reach 14.25 %K −1 (573 K) and 1.48 %K −1 (444 K), respectively. For YNO:Bi 3+ ,Eu 3+ phosphor, the maximum S a and S r reach 38.21 %K −1 (573 K) and 1.58 %K −1 (445 K), respectively. And the chromaticity shift of emission from YNO:Bi 3+ ,Eu 3+ phosphor is 0.38 for temperature from 303 to 573 K. Such results suggest that YNO:Bi 3+ ,Ln 3+ phosphors can be candidate for visual and highly sensitive optical thermometry.
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ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Kang Zhang,Meng-Jiao Zhu,Yi-Wen Zhou,Xiao Liu,Feng Chen,Yu-Yang Zhou,Wan-Fei Li,Sheng Liu,Yun Jiang,Shou-Qing Liu
Latent fingerprint (LFP) powders are crucial in the detection of LFPs in forensic science. However, it is often plagued by poor image resolution and low contrast. Herein, enhanced LFP fluorescence (FL) visualizations are achieved by doping Eu(III) coordination compound Eu(TTA) 3 phen directly into SiO 2 microspheres instead of Eu(III) ions. Using the synthesized Eu(TTA) 3 phen-SiO 2 microspheres , the fine characteristic structure of LFP can be seen and recognized under 365 nm irradiation, up to Level 3. However, the Eu 3+ -SiO 2 microspheres were difficult to recognize the Level 2,3 fingerprint structure. The difference between the ridge and furrow gray values of Eu(TTA) 3 phen-SiO 2 microspheres is 2.1 times that of Eu 3+ -SiO 2 microspheres. The coordination effect increased the asymmetry around Eu(III) ions, resulting in the ultrasensitive 5 D 0 → 7 F 2 transition, thus increasing the FL intensity , and the uniform doping of the Eu(III) coordination compound into SiO 2 also reduced the surface FL quenching due to shielding from oxygen. Under this dual effect, the LFP performance of Eu(TTA) 3 phen-SiO 2 microspheres has been significantly improved. We believe that this novel and easy LFP visualization method is a promising routine in specific target detection including criminal investigation, customhouse check-in, and drug control.
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PubMed
高影响因子
Biosensors-Basel
·
2022
·Vol. 12
·期 11
·977
·
IF 5.743
Birui Jin,Zhiguo Du,Chuyao Zhang,Zhao Yu,Xuemin Wang,Jie Hu,Zedong Li
Inflammationcaused by viral or bacterial infection is a major threat to human health globally. Blood C-reactive protein (CRP) has been proven to be a sensitive indicator for the occurrence and development of inflammation. Furthermore, a tiny change of blood CRP concentration may portend chronic diseases; therefore, high-sensitivity CRP (hs-CRP) detection in a quantitative, rapid, user-friendly, and low-cost manner is highly demanded. In this paper, we developed a europium-chelate polystyrene microsphere (EuPSM)-based lateral flow immunoassay (LFIA) integrating with a benchtop fluorescence analyzer for hs-CRP detection. The optimization of the EuPSM-based LFIA was implemented through adjusting the antibody density on EuPSM from 100% to 60% of the saturated density. Finally, the limit of detection of 0.76 pg/mL and detection range of 0.025–250 ng/mL were obtained. Moreover, the clinical application capability of the proposed platform was validated through detecting CRP in clinical serum samples, showing high consistency with the results obtained from the clinical standard method. Hence, the proposed EuPSM-based LFIA has been verified to be well suitable for hs-CRP detection, while also showing great applicability for sensitively and rapidly detecting other biomarkers.Keywords:fluorescence analysis;sensitivity enhancement;paper microfluidics;hs-CRP detection
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Analytical Methods
·
2023
·
IF 3.1
Xin-Xin Dong,Tao-Li Chen,Xiangjuan Kong,Shuang Wu,Fang-Fang Kong,Qiang Xiao
In this work, a facile fluorescence Eu3+-based metal organic frameworks (Eu MOF) sensor for ascorbic acid (AA) and ascorbate oxidase (AAO) detection was developed. The fluorescence of Eu MOF could be effectively quenched by Ce3+ but not Ce4+ at an appropriate concentration, thus, when the reductant AA was added into the solution containing Ce4+, Ce4+ was chemically reduced to Ce3+, which induced the decreased fluorescence signal of Eu MOF. However, when AAO was introduced, AA was effectively oxidized to dehydroascorbic acid (DHAA) under the catalysis of AAO, thus, Ce4+ could not be reduced, resulting in the fluorescence restore of Eu MOF. Hence, the concentration of AA and AAO could be determined by the fluorescence decrease and restore of Eu MOF. The fluorescent platform showed high sensitivity with the limit of detection of 0.32 µM for AA and 1.18 U/L for AAO, respectively. Moreover, the proposed method was successfully applied for AA and AAO determination in real samples, indicating great potential for biomedical application in complex matrices.
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