MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 6
·1-11
·
IF 5.3
Zhang Xingping,Feng Yujun,Chen Xiaowei,Wang Yuanyuan,Guo Yingli,Yang Xin,Yang Hualin
A sensitive fluorescence and colorimetric dual-mode detection method based on Eu 3+ and Fe 3 O 4 @MoS 2 nanocomposites was constructed. In this technique, tetracycline antibiotics (TCs) chelated with Eu 3+ to form a Eu 3+ -TCs complex which emits red fluorescence at 620 nm through the antenna effect. At the same time, Eu 3+ -TCs complex enhances the peroxidase-like activity of Fe 3 O 4 @MoS 2 to catalyze the oxidation of 3,3’,5,5’-tetramethylbenzidine (TMB) that can produce a colorimetric signal. This proposed strategy has been used to detect three antibiotics including oxytetracycline (OTC), tetracycline (TC), and chlortetracycline hydrochloride (HCl-CTC). The linear ranges of the new assay for OTC, TC, and HCl-CTC were 0.1–25 μM, 0.5–25 μM, and 0.05–5 μM with the detection limits of 0.016 μM, 0.039 μM, and 0.036 μM, respectively. Meanwhile, this new method was fast and convenient which can complete the detection in 22 min. The assay has been effectively applied to TCs detection in tap water, lake water and honey with satisfactory recoveries of 90.55–109.86%. Graphical
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Guoxu Qin,Yaqiong Kong,Tianjue Gan,Yonghong Ni
Facile and rapid detection of residual organic pesticides on the fruits and vegetables has recently drawn increased attention in the food safety field. Herein, a surfactant-assisted solvothermal route with subsequent post-modification was designed for the preparation of Eu3+-functionated Zn-BDC ultrathin nanosheets (labeled as Eu3+@Zn-MOF-NS, BDC: 1,4-benzenedicarboxylate) with the thickness of 5 nm. The as-obtained Eu3+@Zn-MOF-NS could be homogeneously dispersed in aqueous systems to form a highly-stable collosol. Under the UV excitation of 325 nm, the as-obtained Eu3+@Zn-MOF-NS displayed red photoluminescence emission of Eu3+ ions, which could be notably quenched by an organochlorine pesticide, 2,6-dichloro-4-nitroaniline (DCNA), without interferences from ions, organic small molecules, and other pesticides. The detection limit and Ksv were 0.17 μM (35 ppb) and 3.2 × 105 M–1 in the water system, respectively. Moreover, the present 2D Eu3+@Zn-MOF sensor was also employed for the detection of DCNA in Chaohu Lake water and tap water and in apple, cabbage, and pakchoi samples with the relative standard deviation (RSD) ranging from 4.74 to 9.77%. Further investigations revealed that the competitive absorption between DCNA and the as-obtained Eu3+@Zn-MOF-NS resulted in the fluorescence quenching of the probe.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2022
·Vol. 14
·期 9
·1655
·
IF 4.967
Jun Ye,Zichang Fu,Jiawei Rao,Jian Xiong
The influences of interactions between carboxymethyl cellulose (CMC) and CMC/europium (III)–terbium (III) (CET) on the structure and properties of the resultant CMC/CET films were investigated by rheology at three stages of the film-drying process. According to the water content at different drying times, the kinetics curves during the film-drying process were drawn. Then, the rheology properties of film-forming solutions during the drying process were characterized by dynamic modulus, Han plots, zero shear complex viscosity and relaxation time. When the water content was 90%, the film contained either 0.1 or 0.2 g of CET, which had good fluidity, while the film with 0.3 g of CET was elastic-dominated. Han plots and XRD analyses showed that the interactions between the CMC and CET were not hydrogen bonds but random entanglements. The zero-shear complex viscosity and relaxation time spectrum confirmed that the entanglements enhanced as the CET content increased. Meanwhile, aggregation formed in the solution of CMC with 0.3 g of CET. When CMC-CET films with different CET additions were compared, the film with 0.2 g of CET had an even and tight sheet structure, the greatest fluorescence intensity, and superior tensile strength of 78.76 MPa.Keywords:fluorescent carboxymethyl cellulose;rheological properties;mechanical property;polymer chain
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2020
·Vol. 16
·期 25
·2001551
·
IF 11.459
Shahid Ullah Khan,Waheed Ullah Khan,Wasim Ullah Khan,Dilfaraz Khan,Sumbul Saeed,Syed Badshah,Muhammad Ikram,Tawfik A. Saleh
The luminous efficiency of inorganic white light-emitting diodes, to be used by the next generation as light initiators, is continuously progressing and is an emerging interest for researchers. However, low color-rendering index (Ra), high correlated color temperature (CCT), and poor stability limit its wider application. Herein, it is reported that Sm 3+ - and Eu 3+ -doped calcium scandate (CaSc 2 O 4 (CSO)) are an emerging deep-red-emitting material with promising light absorption, enhanced emission properties, and excellent thermal stability that make it a promising candidate with potential applications in emission display, solid-state white lighting, and the device performance of perovskite solar cells (PSCs). The average crystal structures of Sm 3+ -doped CSO are studied by synchrotron X-ray data that correspond to an extremely rigid host structure. Samarium ion is incorporated as a sensitizer that enhances the emission intensity up to 30%, with a high color purity of 88.9% with a 6% increment. The impacts of hosting the sensitizer are studied by quantifying the lifetime curves. The CaSc 2 O 4 :0.15Eu 3+ ,0.03Sm 3+ phosphor offers significant resistance to thermal quenching. The incorporation of lanthanide ion-doped phosphors CSOE into PSCs is investigated along with their potential applications. The CSOE-coated PSCs devices exhibit a high current density and a high power conversion efficiency (15.96%) when compared to the uncoated control devices.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 100
·57048-57053
·
IF 3.708
Hong Liu,Ping Liu,Xiangming Su,Jie Liu,Xiaoqing Li,Hongde Luo,Zhiling Yao,Xibin Yu,Ming Zhan
Highly crystallized micro/nano-sized Y2O2S and RE (Eu3+, Yb3+/Er3+) doped samples were prepared through a one-pot mild (200–250 °C) solvothermal method. By simply adjusting the amount of initial sulfur powder, the morphology and assembled nano-structures could be well controlled. With varying concentration of sulfur powder from 0.08 M to 0.8 M, the morphology and size of the target products varied from 20 nm nanosheets, 2 μm sheet-assembled plates/flowers to 1.5 μm nano-assembled spheres. The luminescence properties of Eu3+ doped Y2O2S with different morphologies were studied. The excitation peak above 300 nm ascribed to S2−–Eu3+ charge transfer showed a blue shift of 9 nm compared with the bulk sample. When co-doped with Yb3+/Er3+, the Y2O2S:Yb3+, Er3+ nano-aggregates exhibited a tunable emission under 980 nm laser excitation, shifting from greenish-yellow to orange-yellow, with increasing Yb3+/Er3+ ratio.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 7
·5615-5622
·
IF 1.798
Chu Yang,Hao Haixia,Xie Hongde,Chen Cuili,Cai Peiqing,Seo Hyo Jin
In this work, we report the preparation of lanthanide (Eu 3+ , Tb 3+ )-complex-grafted copolymer of methyl methacrylate and maleic anhydride films. The lanthanide complex with three amino groups was used to react with poly(methyl methacrylate-co-maleic anhydride) (P(MMA-MAH)) via the amidation method. Fourier transform infrared (FT-IR), Transmission electron microscope (TEM), Scanning electron microscope (SEM), Thermogravimetric analysis (TGA) were employed to characterize those polymers. Luminescent properties were evaluated through conducting Photoluminescence (PL) excitation spectra, emission spectra and fluorescence decay curves measurements. The infrared analysis reveals the amidation between amino groups and anhydride rings. The comparatively uniform morphology can be observed in the images of TEM and SEM. These polymers can emit intense characteristic lights including red light from Eu 3+ ions and green light from Tb 3+ ions under 294 nm excitation. The lifetimes of polymers are short (about 1 ms). Meanwhile, these luminescent polymers exhibit high thermal stability (T 5 > 200 °C). We also stimulate a lamp to illustrate the possible application. All these approved interesting results suggest that they hold significant promising applications as luminous layers for optoelectronic devices.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Guangjian Zeng,Meiying Liu,Chunning Heng,Qiang Huang,Liucheng Mao,Hongye Huang,Junfeng Hui,Fengjie Deng,Xiaoyong Zhang,Yen Wei
The Eu 3+ doped luminescent hydroxyapatite (HAp) nanorods with uniform size and morphology can be synthesized by hydrothermal route. However, these HAp nanorods are coated by hydrophobic oleylamine, which makes them difficult to be dispersed in aqueous solution and impede their biomedical applications. In this work, Eu 3+ doped luminescent polymers functionalized HAp nanorods were prepared through the combination of ligand exchange reaction and metal free surface initiated atom transfer radical polymerization (ATRP) method. In this procedure, the amino group functionalized HAp nanorods were first prepared by ligand exchange reaction using adenosine monophosphate (AMP) as ligand. Then the Br-containing initiators (HAp-Br) were introduced onto the surface of HAp-AMP nanorods through the amidation reaction. Finally, polymers functionalized HAp nanorods were prepared by metal free ATRP method using poly(ethylene glycol) methacrylate (PEGMA) as monomer and 10-phenylphenothiazine (PTH) as organic photocatalyst. The properties of these obtained HAp nanocomposites (HAP-polyPEGMA nanorods) were characterized by means of transmission electron microscopy, Fourier transformed infrared spectroscopy, X-ray photoelectron spectroscopy and thermogravimetric analysis in detail. The cell imaging of these HAP-polyPEGMA nanorods was examined using laser scanning confocal microscope to evaluate their biomedical applications. We demonstrated for the first time that hydrophobic luminescent HAp nanorods can be functionalized with polyPEGMA through the combination of ligand exchange reaction and metal free surface initiated ATRP. As compared with the traditional ATRP, the metal free ATRP can overcome the toxic and fluorescence quenching effects of metal catalysts such as copper ions. More importantly, the strategy described in this work should also be utilized for fabrications of many other luminescent polymer nanocomposites due to its good monomer adoptability.
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2024
·
IF 3.6
Xinyue Qian,Cheng Tan,Jing Zhang,Kang Wu,Anping Deng,Jianguo Li
The “antenna effect” is one of the most important energy transfer modes in lanthanide light-emitting polymers. In this study, novel luminescent nanostructured coordination polymers (Eu–PCP) were synthesized in one step using Eu3+ as the central metal ion and 5,10,15,20-tetrakis (4-carboxyphenyl) porphyrin (TCPP) as the organic ligand. The unique “antenna effect” observed between Eu3+ and TCPP leads to a substantial improvement in the electrochemiluminescence (ECL) emission efficiency. Eu–PCP exhibits good cathodic ECL characteristics. Additionally, Au@SnS2 nanosheets exhibit favorable electrical conductivity, biocompatibility, and a significant specific surface area. This makes them a suitable choice as substrate materials for the modification of electrode surfaces and capturing antigens. Being well known, the development of sensitive and rapid methods to detect chloramphenicol is essential for food safety. Based on this, we report a novel competitive electrochemiluminescence immunoassay to achieve ultra-sensitive and highly specific detection of chloramphenicol. The linear range was 0.0002–500 ng mL−1 and the detection limit was 0.09 pg mL−1. Apart from that, the experimental results proved that it provided a new analytical tool for the detection of antibiotic residues in food safety.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYST
·
2024
·Vol. 149
·期 5
·1571-1578
·
IF 3.6
Jialu Zhang,Yuanyuan Chen,Ji Qi,Qinglan Miao,Dongmei Deng,Haibo He,Xiaoxia Yan,Liqiang Luo
Paper-based ratiometric fluorescence sensors are normally prepared using two or more types of fluorescent materials on a paper chip for simple, low-cost and fast detection. However, the choice of multi-step and one-step modifications on the paper chip affects the analytical performance. Herein, a novel paper-based dual-emission ratiometric fluorescence sensor was designed for the selective detection of tetracycline (TC). Carbon dots (CDs) modified with Eu3+ were combined with a sealed paper-based microfluidic chip by two methods: one-step grafting of CDs-Eu3+ on paper and step-by-step grafting of CDs and Eu3+ on paper. The analytical performance was studied and optimized respectively. The red fluorescence of Eu3+ at 450 nm is enhanced and the blue fluorescence of CDs at 617 nm is quenched by energy transfer in the presence of TC. Under optimal conditions, TC is selectively determined in the linear range from 0.1 μM to 100 μM with a detection limit of 0.03 μM by the step-by-step grafting method. In addition, the sealed paper chip could effectively prevent pollution and volatilization from the reagent. This technique has been used to analyze TC in seafood aquaculture water with satisfactory results.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 21
·1721
·
IF 4.4
Qi You,Xuan Zhou,Chengxiang Yang,Mu Liu,Wei Liu,Jinkai Li,Xuchuan Jiang
A series of red-emitting phosphors, Na3.6Y1.8−x(PO4)3:xEu3+, have been synthesized by a high-temperature solid-phase method. The impact of the partial Li+/K+ion substitution on the crystal structure and photoluminescence (PL) performance of Na3.6Y1.05(PO4)3:0.75Eu3+phosphor have been investigated. Various techniques have been used for characterization of the as-obtained materials. X-ray diffraction (XRD) analysis was utilized to confirm the composites of these samples, and the morphology and element distribution were examined by scanning electron microscope (SEM) and transmission electron microscope (TEM). This study found that the developed Na3.6Y1.8−x(PO4)3:xEu3+phosphors exhibited a prominent emission peak at ~620 nm when excited at 393 nm, which corresponded to5D0→7F2transitions of Eu3+ions. Furthermore, the robust emission peak at ~705 nm (5D0→7F4) of these phosphors enables a better match with plant pigment absorption. Beyond that, the partial substitution of Li+/K+ions probably changed the crystal structure, and reduces the symmetry around Eu3+, leading to significantly enhanced luminous intensities by 23.24% and 18.29%, with the highest quantum yields (QYs) reaching 99.85% and 96.29%, respectively. Additionally, the prepared phosphors show non-thermal quenching and superior thermal stability at elevated temperatures from 298 to 473 K. These findings and results suggest that Li⁺/K⁺-substituted Na3.6Y1.05(PO₄)₃:0.75Eu3⁺ phosphors can serve as promising red-emitting phosphors for plant lighting applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Changyuan Xu,Fengjiao Zhao,Yan Ding,Haizhen Song,Qun Wang,Hongming Yin
In this study, we propose a novel strategy to reduce Eu 2 O 3 to Eu 2+ in the 34.88P 2 O 5 -13.57B 2 O 3 -34.88ZnO-16.67KBr (PBZB) glass system by introducing (NH 4 ) 2 HPO 4 as a reducing phosphorus source. Photoluminescence (PL), photoluminescence excitation (PLE) spectral and UV–Vis absorption spectral analyses revealed that the emission peak at 325 nm excitation originates from the 4f 6 5d 1 → 4f 7 transition of Eu 2+ , confirming the reduction efficacy of (NH 4 ) 2 HPO 4 . Furthermore, incorporating 7.14 % Mn 2+ into PBZB glass and adjusting the concentration of Eu 2 O 3 demonstrated that Eu 2+ doping significantly enhances the red emission of Mn 2+ at 630 nm. Specifically, when the Eu 2 O 3 concentration is 0.12 mol%, the Mn 2+ emission intensity reaches its peak, with a 32.6 % increase in photoluminescence quantum yield (PLQY). However, further increasing the Eu 2 O 3 concentration leads to a decrease in Mn 2+ emission intensity and the appearance of Eu 3+ emission peaks, indicating a limited reduction capacity. Emission spectrum analysis showed a Eu 3+ reduction rate of 76.09 %. The effective energy transfer mechanism from Eu 2+ to Mn 2+ was verified through spectral overlap and decay curve analysis, with calculated energy transfer efficiency being similar to the PLQY increment. This study simplifies the Eu 3+ reduction process and provides a new method for optimizing Mn 2+ red emission in glass.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Optical Materials
·
2024
·
IF 0
Haitang Hu,Miaomiao Wang,Shoujun Ding,Chuancheng Zhang,Hao Ren,Yong Zou,Wenpeng Liu
Rare earth ion-doped luminescent materials exhibit significant potential for application in visible solid-state laser and anticounterfeiting applications. The Czochralski method was employed to successfully synthesize high-quality Dy3+, Eu3+ codoped Gd3Sc2Al3O12 (GSAG), and Gd2.79Y0.21Sc2Al3O12 (GYSAG) single crystals. Comprehensive studies were conducted on their structural and physicochemical properties, luminescence properties, and fluorescence lifetime. The Dy,Eu:GSAG and Dy,Eu:GYSAG crystals both display favorable thermal conductivity values of 5.56 and 5.43 W m–1 K–1, respectively, along with commendable hardness properties of 7.241 and 7.247 kg/mm2. The emission color of the Dy,Eu:G(Y)SAG crystals can be adjusted from white light under a 355 nm excitation to orange-red light under a 405 nm excitation and bright yellow light under a 450 nm excitation. Additionally, the maximum stimulated emission cross-section for both crystals was calculated under various wavelength laser excitations. The fluorescence lifetime of the crystals at the 4F9/2 level (Dy3+) and the 5D0 level (Eu3+) was also examined. Notably, the fluorescence quantum efficiencies at the 4F9/2 level in Dy,Eu:GSAG and Dy,Eu:GYSAG were measured to be impressive at 91.3 and 92.7%, respectively. The mechanism of resonance energy transfer between Dy3+ and Eu3+ was analyzed, indicating promising applications of Dy,Eu:G(Y)SAG in visible solid-state lasers and multimode anticounterfeiting.
✓ 已验证
DOI
危险品化学品经营许可证（带存储）