FOOD CHEMISTRY
·
2023
·
IF 8.8
Beibei Zhao,Xinfang Liu,Zheng Cheng,Xu Liu,Xiaoyu Zhang,Xun Feng
Pymetrozine (PYM) is an effective pyridine insecticide for controlling aphids, while its residues pose a serious threat to human health. Herein, a europium complex (Eu-DBPA, DBPA represents deprotonated 2,5-dibromoterephthalic acid ligand) probe was prepared for the detection of PYM via fluorescence quenching . The detection process has the advantages of short response time (2 min), wide linear range (0–4 and 4–45 mg/kg) and low detection limit (2.2 μg/kg). Furthermore, a portable detection platform was designed by integrating Eu-DBPA-based paper strip with smartphone and applied for the visual detection of PYM in real cucumber, tomato, cabbage and apple samples, obtaining satisfactory recovery (99.00 %–107.00 %) and low standard deviation (RSD < 3.4 %). In addition, a logic gate device was designed to simplify the detection process. The smartphone-integrated paper-based probe detection platform provides a new strategy for intelligent and online identification of hazards in environmental and biological samples.
研究领域:
分析化学
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环境科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 41
·30037-30044
·
IF 3.9
Qiuping Li,Qianqian Wen,Zian Fang,Yidi Wang,Hongxia Ouyang,Qi Wang,Meng Wei
The development of novel rare earth fluorescent materials and the exploration of their applications have consistently been focal points of research in the fields of materials science and chemistry. In this work, a novel rare earth composite material with good photo-fluorescence properties and self-supporting has been prepared via a simple ultrasonic solvent reaction method. Initially, the Phen moieties is immobilized onto the surface of a self-supporting fiberglass paper using ICPTES, followed by the coordination of Eu(TTA)3 moieties with Phen moieties through a convenient ultrasonic solvent reaction. The resulting GF–Phen–Eu(TTA)3 has been characterized using FTIR, UV-Vis DRS, fluorescence measurements, and so on. The results indicate that the composite material exhibits strong fluorescent emission and presents a vivid red color under ultraviolet light. Further research has shown that the fluorescence of GF–Phen–Eu(TTA)3 strips demonstrated a pronounced quenching effect in response to some transition metal ions (1 mM). Hence, the rare earth composite materials presented here can be utilized not only for the production of optical materials, but also for the development of fluorescence sensing strips.
研究领域:
材料科学
·
化学
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2014
·
IF 4.384
Qiong Li,Jianan Zhang,Wei Sun,Jiangbo Yu,Changfeng Wu,Weiping Qin,Daniel T. Chiu
We report on a europium-complex-grafted polymer for preparing stable nanoparticle probes with high luminescence brightness, narrow emission bandwidth, and long luminescence lifetimes. A Eu complex bearing an amino group was used to react with a functional copolymer poly(styrene-co-maleic anhydride) by the spontaneous amidation reaction, producing the polymer grafted with Eu complexes in the side chains. The Eu-complex-grafted polymer was further used to prepare Eu-complex-grafted polymer dots (Pdots) and Eu-complex-blended poly(9-vinylcarbazole) composite Pdots, which showed improved colloidal stability as compared to those directly doped with Eu-complex molecules. Both types of Pdots can be efficiently quenched by a nile blue dye, exhibiting much lower detection limit and higher quenching sensitivity as compared to free Eu-complex molecules. Steady-state spectroscopy and time-resolved decay dynamics suggest the quenching mechanism is via efficient fluorescence resonance energy transfer from the Eu complex inside a Pdot to surface dye molecules. The amplified quenching in Eu-complex Pdots, together with efficient cell uptake and specific cell surface labeling observed in mammalian cells, suggests their potential applications in time-resolved bioassays and cellular imaging.
研究领域:
材料科学
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生物医学工程
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分析化学
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DOI
PubMed
高影响因子
Polymers
·
2023
·Vol. 15
·期 5
·1064
·
IF 5
Lijun Gao,Liuyang Li,Yunqiu Li,Congcong He,Liming Zhou,Xiongwei Qu,Shaoming Fang
A europium complex with double bonds was synthesized with crotonic acid as the ligand and a europium ion as the center ion. Then, the obtained europium complex was added to synthesized poly(urethane-acrylate) macromonomers to prepare the bonded polyurethane-europium materials by the polymerization of the double bonds in the complex and the poly(urethane-acrylate) macromonomers. The prepared polyurethane-europium materials had high transparency, good thermal stability and good fluorescence. The storage moduli of polyurethane-europium materials are obviously higher than those of pure polyurethane. Polyurethane-europium materials exhibit bright red light with good monochromaticity. The light transmittance of the material decreases slightly with increases in the europium complex content, but the luminescence intensity gradually increases. In particular, polyurethane-europium materials possess a long luminescence lifetime, which has potential applications for optical display instruments.Keywords:europium complex;polyurethane;composite;transparency;photoluminescence
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANICA CHIMICA ACTA
·
2025
·
IF 3.2
Zhi Shen,Qi-Yang Li,Lin-Xi Qin,Meng-ting Fan,Qiang Zhao
In order to better study the properties of rare earth europium complexes in terms of fluorescence and probes, in this work, 5-(4-carboxyphenoxy)isophthalic acid (H 3 cpipa) and rare metal ion Eu 3+ were used to synthesize metal complex by solvothermal reaction. Then complex [(Eu 2 (cpipa) 2 ·4H 2 O)·8H 2 O] n (1) was synthesized. Data on the structure acquired via an X-ray single-crystal diffractometer indicates that complex 1 is a three-dimensional network structure with a hollow structure. Moreover, solid-state fluorescence tests were carried out on H 3 cpipa and complex 1 . Fluorescence recognition studies were conducted on complex 1 in dispersed systems. The solid-state fluorescence results show that complex 1 has excellent fluorescence properties, with higher fluorescence intensity than the ligand, and it exhibits the bright characteristic red light of europium under fluorescent lamp. Fluorescence recognition studies have shown that complex 1 in dispersed systems serves as a fluorescent probe for both solvent molecule recognition and cation recognition. In solvent molecule systems, complex 1 exhibits good recognition of acetone, while in cation systems, complex 1 shows good selectivity for Fe 3+ ions
研究领域:
无机化学
·
材料科学
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发光学
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配位化学
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分析化学
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2016
·Vol. 183
·期 9
·2605-2613
·
IF 4.831
Liu Yanting,Zhou Shixin,Fan Louzhen,Fan Hong
We have prepared graphene quantum dot-europium(III) complex composites by noncovalently connecting chelating ligands dibenzoylmethane (DBM) and 1,10-phenanthroline (Phen) with graphene quantum dots (GQDs) first, followed by coordination to Eu(III). The resulting composites are well water-soluble and display red fluorescence of high color purity. The composites were characterized by transmission electron microscopy, X-ray photoelectron spectroscopy and X-ray diffraction. Aqueous solutions of the composites under 365 nm excitation display fluorescence with a peak at 613 nm and a quantum yield as high as 15.5 %. The good water solubility and stable photoluminescence make the composites very different from other Eu(III)-based coordination complexes. The composites are cell viable and can be used to label both the cell membrane and the cytoplasm of MCF-7 cells. They are also shown to act as bioprobes for in-vivo localization of tumorous tissue. In our perception, such composites are expected to possess wide scope because of the many functionalizations that are possible with GQDs.
Synthesis of red fluorescent graphene quantum dot-europium complex composites for use in bioimaging.
研究领域:
材料科学
·
纳米技术
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生物医学工程
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分析化学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2026
·
IF 7.9
Linfeng Jiang,Jingjing Zhang,Xu Liu,Guoqing Zhang,Feng Hong
Europium complex was grafted onto SCFs and FEVE resin by multi-step modification. • Modified SCFs show improved dispersion and compatibility in the FEVE matrix. • The HK-SCF@Eu/FEVE coating provides long-term corrosion protection (1440 h). • Fluorescence attenuation enables real-time corrosion monitoring (R 2 = 0.982). Fluorocarbon resin (FEVE) coatings are widely used for metal corrosion protection due to excellent weatherability and chemical inertness. However, pristine FEVE coatings suffer from microporous defects, while short carbon fibers (SCF) as reinforcing fillers face poor interfacial compatibility and easy agglomeration in the resin matrix. Moreover, traditional coatings lack periodic corrosion monitoring capability. A multi-step surface modification strategy is proposed: SCF are synergistically modified with nitric acid (HNO₃) and a silane coupling agent (KH550) to obtain HK-SCF, improving surface activity and interfacial compatibility; then, a rare-earth europium complex Eu(phen)₂(NO₃)₃ is grafted onto HK-SCF to obtain fluorescence-functionalized HK-SCF@Eu, which is subsequently incorporated into FEVE to construct a fluorescence-sensing composite coating (HK-SCF@Eu/FEVE). Results indicate that synergistic HNO₃-KH550 treatment significantly increases surface roughness and functional group density of SCF, facilitating uniform grafting of the europium complex. At the optimal SCF content of 1.5 wt%, the composite coating exhibits the strongest fluorescence intensity, a tensile strength 38.8% higher than pure FEVE, an elongation at break of 67.7%, a corrosion current density of 3.59 × 10 −9 A·cm −2 , and a polarization resistance of 1.18 × 10 7 Ω·cm 2 . After 1440 h of salt spray and atmospheric corrosion testing, the coating demonstrates excellent long-term corrosion resistance. Furthermore, a linear relationship with R 2 = 0.982 is established between fluorescence intensity attenuation and corrosion time, enabling periodic visual monitoring of coating failure. This work successfully integrates fluorescence sensing into an FEVE-based coating, providing integrated corrosion protection and periodic monitoring for metal structures in marine engineering.
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2015
·
IF 4.762
Jingyan Sun,Bo Song,Zhiqiang Ye,Jingli Yuan
Singlet oxygen (1O2) plays a key role in the photodynamic therapy (PDT) technique of neoplastic diseases. In this work, by using a 9,10-dimethyl-2-anthryl-containing β-diketone, 1,1,1,2,2-pentafluoro-5-(9′,10′-dimethyl-2′-anthryl)-3,5-pentanedione (Hpfdap), as a 1O2-recognition ligand, a novel β-diketonate–europium(III) complex that can act as a luminescence probe for 1O2, [Eu(pfdap)3(tpy)] (tpy = 2,2′,2″-terpyridine), has been designed and synthesized for the time-gated luminescence detection of 1O2 in living cells. The complex is weakly luminescent due to the quenching effect of 9,10-dimethyl-2-anthryl groups. After reaction with 1O2, accompanied by the formation of endoperoxides of 9,10-dimethyl-2-anthryl groups, the luminescence quenching disappears, so that the long-lived luminescence of the europium(III) complex is switched on. The complex showed highly selective luminescence response to 1O2 with a remarkable luminescence enhancement. Combined with the time-gated luminescence imaging technique, the complex was successfully used as a luminescent probe for the monitoring of the time-dependent generation of 1O2 in 5-aminolevulinic acid (a PDT drug) loaded HepG2 cells during the photodynamic process. In addition, by coloading the complex and a mitochondrial indicator, Mito-Tracker Green, into HepG2 cells, the specific localization of [Eu(pfdap)3(tpy)] molecules in mitochondria of HepG2 cells was demonstrated by confocal fluorescence imaging measurements.
研究领域:
生物化学
·
医学影像
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药物化学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 32
·25885
·
IF 4.6
Qiuping Li,Hongxia Ouyang,Xinghui Yang,Qi Wang,Yonghong Ding,Haichao Yu,Zhi Rao
Lanthanide organic–inorganic hybrid fluorescent materials are considered as promising candidates for next-generation lighting materials due to their unique optical properties and potential applications. In this work, commercialized silica materials (fumed silica) were selected as the carrier. By means of the bridging function of silane coupling agents, Eu(TTA) 3 (Phen) was covalently grafted onto the surface of fumed silica to synthesize lanthanide hybrid phosphors. Subsequently, the phosphor was dispersed into the MMA polymerization system, and a monolithic fluorescent organic glass was fabricated via in situ polymerization. Both the obtained europium hybrid phosphor and the europium complex-doped organic glass exhibited intense red fluorescence under UV light and possessed the characteristics of broad absorption, narrow emission, and long fluorescence lifetime. The design and synthesis process is straightforward and cost-effective, making this approach highly valuable for the development and advancement of novel rare earth hybrid luminescent materials. A novel Europium organic–inorganic hybrid fluorescent materials with excellent luminescent properties were successfully synthesized using commercialized silica materials as the carrier and PMMA as the matrix.
研究领域:
材料科学
·
无机化学
·
物理化学
·
高分子科学
·
光学材料
·
纳米技术
·
杂化材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2016
·
IF 2.693
Chaolong Yang,Pan Zhang,Hualin Zhou,Jing Xu,Youbing Li,Mangeng Lu,Lei Lei,Qiang Zhang,Yi Zhang,Shaopeng Chen
A series of environment friendly Eu/PHB fluorescent films through doped the Eu-complex precursor Eu(TTA) 2 (Tpy-OCH 3 )(2H 2 O) into polymer matrices poly-β-hydroxybutyrate (PHB) with doping percentage at 1, 3, 5, and 7 (mass) were designed, fabricated and characterized. TGA and PL results indicated the Eu-complex precursor was immobilized in PHB matrix through the interaction between the Eu-complex. DSC results indicated the crystallinity of Eu/PHB films decreased with the increase of Eu-complex doping percentage. The emission spectra of the Eu-complex and Eu/PHB films recorded at room temperature exhibited the characteristic bands arising from the 5 D 0 / 7 F J . The fact that the quantum efficiencies ( η ) of the doped film increased significantly revealed that the PHB matrix acts as an efficient co-sensitizer for Eu 3+ ions luminescent center and therefore enhances the quantum efficiency of the emitter 5 D 0 level. In particular, all Eu/PHB films can be excited by visible light (410 nm), and also showed good photoluminescent properties. So the new Eu/PHB fluorescent films showed considerable promise for polymer light-emitting diode, active polymer optical fiber and biomedical analysis applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Tianhao Xia,Yuwen Yuan,Yunpeng Wang,Pragati Awasthi,Wenkun Dong,Xvsheng Qiao,Dong Chen,Shisheng Ling,Xianping Fan
This study aims to advance the development of magnetic fluorescent polymer microspheres for biomedical detection applications. Conventionally, dopants have utilized europium(III) (Eu(III)) organic complexes due to their high compatibility with polymers and strong fluorescence. However, as the common magnetic material Fe 3 O 4 can quench their fluorescence, it is hard to synthesize Eu complex-doped magnetic fluorescent materials. To maintain fluorescence in the presence of magnetic parts, in this work, we synthesized Eu-doped magnetic microspheres with multi-layered structure. Firstly, poly-(glycidyl methacrylate) (PGMA) microspheres were prepared as templates and subsequently coated with layers of Fe 3 O 4 and SiO 2 . Then, the synthesized Eu(TTA) 3 (TPPO) 2 were added into PGMA@Fe 3 O 4 @SiO 2 microspheres in either basic or acidic conditions, and covered them with an extra sol–gel layer of silica at the same time. The microspheres exhibit a core–shell structure with sub-micron dimensions (580 nm) and possess favorable superparamagnetic properties ( M s = 22.02 A·m 2 /kg, M r = 1.37 A·m 2 /kg, H c = 0.242 A/m). But the fluorescence of Eu 3+ are significantly quenched by Fe 3 O 4 , O–H oscillators, and N–H oscillators. Finally, to exclude the quenching mentioned above, the first pure SiO 2 shielding layer and the second Eu(TTA) 3 (TPPO) 2 -dispersed SiO 2 layer were coated onto PGMA@Fe 3 O 4 microspheres to prevent the energy transfer due to the quenching centers and hold the fluorescence of Eu 3+ . These findings underscore the considerable potential of these microspheres exhibiting rapid magnetic separation and stable fluorescence for bioimaging and biosensing applications.
研究领域:
材料科学
·
生物医学工程
·
分析化学
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产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Jinhui Zhang,Tongtong Xuan,Peng Li,Huanrong Li,Chengxin Wang,Jing Wang
Eu 3+ complexes are the prime candidates for luminescent down-shifting (LDS) converters of solar cells due to their high luminescent quantum efficiencies (LQE), large Stoke shifts and tunable excitation. However, their instability towards heat will shorten their life in solar cells, especially for outdoor use. Besides, the optical loss of the front glass and encapsulants will trade off the enhanced efficiency by photo-conversion. In this paper, highly emissive hybrid material Eu(PPO) n -C 4 Si@NZ (HY) was obtained by assembling europium complex into three different sizes of stable zeolite L functionalized with a water-soluble stopper. Then a bi-functional layer by incorporating HY (LDS) with anti-reflective SiO 2 was developed. Benefitting from the dual functions, the as-prepared cell with HY@SiO 2 film substrate manifests an increased external quantum efficiency (EQE) in both UV and the longer wavelength regions, compared with pure glass based c-Si solar cell. In the best case, the conversion efficiency of the c-Si solar cell is increased by a relative 3.30% (from 16.386% to 16.926%).
研究领域:
光伏技术
·
材料科学
·
太阳能转换
·
发光材料
·
纳米复合材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）