CERAMICS INTERNATIONAL
·
2015
·
IF 2.605
Jie Chen,Ye Sheng,Xiuqing Zhou,Fei Gao,Chunming Lin,Zhan Shi,Xuechun Xu,Haifeng Zou
SiO 2 and Eu 3+ -doped SiO 2 submicron rods were conveniently fabricated via a sol–gel process at room temperature. In this process, citric acid served as a unique structural modifier through hydrolysis of TEOS at alkaline condition to obtain the silica submicron rods. The morphology of the products was sensitive to the conditions, such as stirring, gelation time and the dropping speed of NH 4 OH. By sampling the products at different reaction times, we discussed the formation and growing mechanism of SiO 2 :Eu 3+ submicron rods in detail. The weak interactions between ammonium citrate crystals and silica species may be the reasons of the rods formation. The obtained silica submicron rods were 5–6 μm in length and 650–750 nm in width and there was no obvious change after doping. Under UV light excitation, the undoped silica submicron rods exhibited blue emission, which may be associated with defect centers in the structures of the products. The Eu 3+ -doped silica submicron rods exhibited red emission, which was due to the 4f→4f transition of Eu 3+ . The effect of different doping concentrations of Eu 3+ ions on the luminescence was investigated. The samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectrum (FT-IR), Thermo-gravimetry Analysis (TGA), Scanning electron microscope (SEM), Transmission electron microscope (TEM), Energy-dispersive spectroscopy (EDS) and Photoluminescence spectrum.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Jiansheng Huo,Yuhui Zheng,Qianming Wang
Novel red-emitting Eu 3+ -activated La 2 − x Gd x (MoO 4 ) 3 − y (WO 4 ) y phosphors with well-defined one-dimensional nanostructures were synthesized via a supersonic microwave co-assistance (SMC) method for the first time at very low temperature (60 °C). Scanning electron microscopy studies substantiated that these phosphors are very uniform. The crystal structure and luminescent properties were characterized by powder X-ray diffraction patterns (XRD) and photoluminescence measurements (PL) respectively. An intense red emission at 615 nm ( 5 D 0 → 7 F 2 ) was detected under the excitation at 280 nm. The PL properties of La 2 − x Gd x (MoO 4 ) 3 − y (WO 4 ) y : Eu 3+ with different ratio of La/Gd or MoO 4 /WO 4 have also been investigated in detail. Furthermore, the optimized phosphor was embedded into the poly-hydroxyethylmethacrylate(HEMA) gel and the corresponding luminescent gel was achieved.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-9
·
IF 15.7
Niu Xinyi,Li Yang,Lu Haolin,Wang Zhaoyu,Zhang Yunxin,Shao Tianyin,Wang Hebin,Gull Sehrish,Sun Bing,Zhang Hao-Li,Chen Yongsheng,Wang Kai,Du Yaping,Long Guankui
Chiral organic-inorganic hybrid metal halides as promising circularly polarized luminescence (CPL) emitter candidates hold great potential for high-definition displays and future spin-optoelectronics. The recent challenge lies primarily in developing high-performance red CPL emitters. Here, coupling the f - f transition characteristics of trivalent europium ions (Eu 3+ ) with chirality, we construct the chiral Eu-based halides, ( R / S -3BrMBA) 3 EuCl 6 , which exhibit strong and predictable red emission with large photoluminescence quantum yield (59.8%), narrow bandwidth (≈2 nm), long lifetime (≈2 ms), together with large dissymmetry factor | g lum | of 1.84 × 10 −2 . Compared with the previously reported chiral metal halides, these chiral Eu-based halides show the highest red CPL brightness. Furthermore, the degree of photoluminescence polarization in ( R / S -3BrMBA) 3 EuCl 6 can be manipulated by the external magnetic field. Particularly, benefiting from the field-generated Zeeman splitting and spin mixing at exciton states, an anomalously positive magneto-photoluminescence was observed at room temperature. This work provides an efficient strategy for constructing both high-performance and pure-red CPL emitters. It also opens the door for chiral rare-earth halides toward chiral optoelectronic and spintronic applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLID STATE SCIENCES
·
2024
·
IF 3.4
Jingjing Lian,Xiya Miao,Yilian Ran,Ruiqi Liu,Xiang Liu,Ling-Ling Zheng,Ruijin Yu
A series of orange-red InGaZnO 4 : x Eu 3+ (0.2 mol% ≤ x ≤ 20 mol%) phosphors were successfully synthesized via high-temperature solid-state reaction. The structural characterization, morphology, elemental analysis, and optical properties of the prepared phosphors were extensively discussed. Under 468 nm excitation, the prepared phosphors emit orange-red light at 614 nm and 625 nm due to the electric dipole (ED) transition from the 5 D 0 to 7 F 2 level of Eu 3+ . The emission peak at 593 nm is attributed to the magnetic dipole (MD) transition. The optimal doping concentration of Eu 3+ in the phosphor is 2 mol%, resulting in excellent color purity, with all samples exhibiting purity levels exceeding 99.9 %. Furthermore, the phosphors demonstrate remarkable thermal stability, retaining 73.5 % of their luminescent intensity at 420 K and surpassing a thermal quenching temperature of 480 K. The calculated activation energy (E a ) of InGaZnO 4 :2 mol%Eu³⁺ (0.27 eV) further underscores its exceptional thermal stability. The internal quantum efficiency (IQE) of the InGaZnO 4 :2 mol%Eu 3+ phosphor is measured at 46.3 %, indicating a high level of photoelectric conversion efficiency. Latent fingerprints (LFPs) developed using the InGaZnO 4 :2 mol%Eu 3+ phosphor display outstanding selectivity and contrast, allowing for precise identification of Level I-III fingerprint details. Additionally, security ink formulated with InGaZnO 4 :2 mol%Eu 3+ shows potential applications in information encryption and anti-counterfeiting measures. Therefore, the investigated phosphors exhibit significant potential for further development due to their favorable optical properties.
研究领域:
材料科学
·
光学
·
法医学
·
应用化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Zhengting Zhang,Guiyun Yi,Peng Li,Xikui Wang,Xiaodong Wang,Chuanxiang Zhang,Yulong Zhang,Qi Sun
Herein, a novel europium/graphene oxide/lead oxide (Eu/GO/PbO 2 ) composite based anode with excellent electrocatalytic performance towards degradation of hydroquinone was prepared by a facile co-electrodeposition method. The composition and micromorphology of the anode was investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) and the results confirmed that europium (Eu) and graphene oxide (GO) were successfully composited with PbO 2 and a more compact structure was obtained, which was conductive to enhancing the corrosion resistance of the electrode. Besides, electrochemical measurements indicated that Eu/GO/PbO 2 electrode possessed longer service lifetime (87 h), higher oxygen evolution potential (2.64 V), and lower charge transfer resistance (41.08 Ω) than GO/PbO 2 and pure PbO 2 electrode. The promoted electrocatalytic activity of Eu/GO/PbO 2 electrode was ascribed to its stronger hydroxyl radical generation ability, more active sites and lower electron transfer resistance. Additionally, effects of initial hydroquinone concentration, applied current density and initial pH value on the degradation performance of Eu/GO/PbO 2 anode were systematically investigated. The behind degradation mechanism of hydroquinone by Eu/GO/PbO 2 anode was speculated on the basis of the major intermediates identified by high performance liquid chromatography-mass spectrometer (HPLC-MS). Under the continuous attack of free hydroxyl radicals, hydroquinone was finally decontaminated into CO 2 and H 2 O. The present work demonstrated that Eu/GO/PbO 2 composite anode exhibited excellent degradation performance towards hydroquinone.
研究领域:
环境科学
·
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Pan Liu,Chenchen Ma,Zihan Ma,Ziyuan He,Xianjian Wang,Longhao Zhao,Xuegang Chen
The synthesis of a series of side-chain π-conjugated fluorene and terpyridine-functionalized hydrophilic poly(acrylamide) hydrogels via radical random copolymerization was reported. Based on the coordination of terpyridines and europium (III) ions, the dual-network hydrogels containing chemical covalent cross-linking bonds and metallo-supramolecular cross-linking bonds were prepared. Their structures and properties were studied systematically via NMR, IR, SEM , UV–vis absorption spectra , photoluminescence spectra and rheological. The photophysical properties showed that there was Förster energy transfer from conjugated chromophores (emission wavelength at 359–435 nm) to the europium emitter. The water content and the ratio of the energy donor and acceptor in the hydrogels make important influences on the energy transfer and then the emission color of the resulting dual-network hydrogel can be regulated from blue to red via controlling the degree of the energy transfer. Meanwhile, the dual-network hydrogels exhibited small and uniform pore structure and good mechanical properties with large storage and loss moduli .
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2021
·
IF 4.089
Chao Bai,Lei Yan,Huai-Ming Hu,Feng Zou,Tian-Hua Zhang,Ganglin Xue
A ternary europium(III) coordination polymer, namely, [Eu(ctpy)(tta)2]n (1) (Hctpy = 4′-carboxy-2,2′:6′,2″-terpyridine and Htta = 2-thenoyltrifluoroacetone), was obtained and exhibits a 1D chain structure. 1-Eu emits intense red light, which can act as a luminescent dopant to be immobilized into polymers to prepare nanofiber films by an electrospinning technique. Subsequently, ternary europium-chain@polymer nanofiber films (1-Eu@PAN and 1-Eu@PMMA, PAN = polyacrylonitrile, PMMA = poly(methyl methacrylate)) as functional films have been successfully fabricated. These nanofiber films possess excellent mechanical strength and photo-/thermal stability, as well as emit luminous red light. The luminescent investigation indicates that the maximum intensity of the 5D0 → 7F2 transition of EuIII ion occurs in 1-Eu@PAN and 1-Eu@PMMA nanofiber films with 10 wt % 1-Eu loading. In addition, 10% 1-Eu@PAN nanofiber film can be used as a recyclable sensor for detecting Fe3+ ion in aqueous solution because 10% 1-Eu@PAN nanofiber film have good recyclability and selectivity. Electrospinning technique is an effective strategy to fabricate lanthanide coordination polymer-encapsulated polymer fiber films and to contribute to develop sensors.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 21
·5645-5652
·
IF 7.779
Yuan Lin,Chun-Li Hu,Zhi Fang,Jin Chen,Wei-Jie Xie,Yan Chen,Jian-Pu Wang,Jiang-Gao Mao
Three new potassium rare earth carbonates, namely KRE(CO3)2 (RE = Eu, Gd, Tb), were synthesized successfully. Their structures feature a novel [RE(CO3)2]− 3D framework with 1D channels along the c axis filled with K+ cations. Among them, KEu(CO3)2 and KTb(CO3)2 emit strong red and green photoluminescence, respectively. The birefringence values of KRE(CO3)2 were measured as 0.149, 0.162 and 0.215 at 546 nm, respectively. Remarkably, KTb(CO3)2 has the largest experimental birefringence among carbonates reported.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Jing Yang,Meng Chen,Peng Li,Fei Cheng,Yang Xu,Zhiqiang Li,Yige Wang,Huanrong Li
The integration of self-healing ability into luminescent switches have attracted increasing interest in designing smart optical devices. In this paper, an acid-base vapor modulated luminescent switch of hydrogels based on Eu-containing polyoxometalate (EuPOM) and poly(2-acrylamido-2-methyl-1-propanesulfonicacid) (PAMPSA) was readily prepared, which can self-heal within only about few minutes under ambient atmosphere. Besides, the hydrogels can easily be shaped into any desired form by pouring into molds. These remarkable features enable the resulting hydrogel as a promising “smart” material with use in smart devices, sensors, etc.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2019
·
IF 4.85
Xiao Zhou,Hongwei Wang,Sha Jiang,Guotao Xiang,Xiao Tang,Xiaobing Luo,Li Li,Xianju Zhou
A series of lanthanide organic complexes, namely, [Ln2PDC3(H2O)3]H2O (Ln = Eu, Tb, EuxTb2–x, H2PDC: pyridine-3,5-dicarboxylic acid), were synthesized via hydrothermal method. Eu-PDC was characterized by single-crystal X-ray diffraction. The powder X-ray diffraction, Fourier transform infrared spectra, and thermogravimetric analysis illustrate that Eu-PDC, Tb-PDC, and EuxTb2–x-PDC complexes are isostructural. All the complexes exhibit strong emission even though water molecules coordinated in the structure. Tunable emission color from green, yellow to red is realized by adjusting the Eu/Tb ratio in mixed EuxTb2–x-PDC complexes. Energy transfer from Tb3+ to Eu3+ is discussed in detail via fluorescence decay and time resolution spectra. The detailed energy transfer process sees that the emitting color of Eu0.15Tb1.85-PDC shifts from green to orange in a time interval of 153–790 μs. In addition, temperature-dependent emission of the Eu0.05Tb1.95-PDC complex indicates that it is a potential solid state material for a luminescence thermometer in the range of 293–333 K. The temperature resolution is less than 0.16 K. The optical properties of the EuTb-PDC complex indicate that it is a multifunctional luminescent material with promising applications in temperature sensing, time resolution imaging, lighting, and displaying.
研究领域:
无机化学
·
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Zhijie Liang,Minggui Lu,Haibing Cheng,Shukui Shi,Qinghui Mao
Smart, responsive clothing refers to textiles that exhibit a response to specific stimuli, resulting in a modification of their inherent characteristics. One specific class focuses on luminescence materials, which emit light of different colors when exposed to light excitation. A luminescent cotton fabric based on padding technique is obtained in this case. The aforementioned textile is produced by the utilization of an aqueous-based formulation that incorporates an inorganic polyoxometalate . The excitation peaks are present at 262 nm, while a series of emission peaks are present at range of 580–701 nm, in the photoluminescent cotton fabric. Furthermore, the fluorescent optical photo, scanning electron microscope, elemental mapping, energy dispersive X-ray spectroscopy, fluorescence emission, and UV–vis absorption data of the treated cotton fabric are described. A reversible rapid response was additionally demonstrated by the treated fabric during the emission of red light with the chromatic coordinate (0.6425, 0.3570) under ultra-violet excitation. Besides, the lifetime-decay behavior is consistent with a single-exponential function with τ = 2.4 ms and the possible process of the energy transfer from POMs to Eu 3+ is exhibited. It is posited that the utilization of the concept and composite materials holds potential for the advancement and diversification of smart and multi-functional fabric domains.
研究领域:
材料科学
·
纺织工程
·
光学材料
✓ 已验证
产品关联
DOI
高影响因子
Applied Materials Today
·
2024
·
IF 7.2
Wei Chen,Qinglin Tang,Rui Xu,Jin Liu,Yao Wang,Wei Wang,Yanxin Wang,Christopher D. Snow,Jun Li,Matt J. Kipper,Laurence A. Belfiore,Jianguo Tang
The protection of personal information is becoming increasingly difficult in the age of rapid growth in communication and information technologies. However, current relating techniques, such as anti-counterfeiting, depend on the simple luminescence image and UV–recognition. Thus, advanced methods for information encryption and decryption are urgently required. Herein, we report a full fluorescence paper (FFP) containing stable, fluorescent Eu 3+ –induced diblock nanoaggregates (EIPAs), and design a negative photon information multiple encryption (NME) method. Multiple quenching mechanisms can be employed to encrypt and decrypt information, using different quenching molecules. These include an internal filtering effect, a dynamic quenching effect, and a combined static and dynamic quenching effect. The recovery of different information under different light sources enables encryption and decryption cycles.
研究领域:
材料科学
·
光学
·
信息安全
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）