PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2020
·Vol. 22
·期 39
·22746-22757
·
IF 3.43
Wenting Wei,Jiaxuan Li,Huiqin Yao,Keren Shi,Hongyun Liu
Herein, a new type of lanthanide coordination polymer film made up of europium (Eu(III)) and poly(N-methacryloylglycine) (Eu(III)–PMAG) was prepared on an ITO electrode surface driven by the coordination between N-methacryloylglycine (MAG) and Eu(III) through a single-step polymerization process. The fluorescence signal of Eu(III)–PMAG films at 617 nm originating from Eu(III) could be well retained in the buffer solution but was regulated by the concentration of Cu(II) and the complexing agent EDTA. The switching of fluorescence by Cu(II) was attributed to the inhibition of the “antenna effect” between Eu(III) and the MAG ligand in the films. The coexistence of reduced β-nicotinamide adenine dinucleotide (NADH) in the solution can apparently quench the fluorescence of Eu(III)–PMAG films through the internal filtration effect of UV absorbance overlapping the excitation wavelength, but itself exhibiting a fluorescence emission at 468 nm. In addition, the electrocatalytic oxidation of NADH with the help of the ferrocenedicarboxylic acid (FcDA) probe demonstrated a cyclic voltammetry (CV) signal at 0.45 V (vs. SCE). Based on various reversible stimulus-responsive behaviours, a 4-input/10-output logic network was built using Cu(II), EDTA, NADH and FcDA as inputs and the signals of fluorescence from Eu(III)–PMAG (617 nm) and NADH (468 nm), the CV response from FcDA and the UV-vis absorbance from the Cu(II)–EDTA complex as outputs. Meanwhile, 6 different functional logic devices were constructed based on the same versatile platform, including a 2-to-1 encoder, a 1-to-2 decoder, a 1-to-2 demultiplexer, a parity checker, a transfer gate and a reprogrammable 3-input/2-output keypad lock. Combined with the new type of lanthanide coordination polymer film, NADH played central roles in designing sophisticated computing systems with its fluorescence, UV and electrocatalytic properties. This work might provide a novel avenue to develop intelligent multi-analyte sensing and information processing at the molecular level based on one single platform.
研究领域:
生物化学
·
材料科学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
CRYSTAL RESEARCH AND TECHNOLOGY
·
2016
·Vol. 51
·期 9
·508-512
·
IF 0.908
Hai Wu,Youjin Zhang,Maozhong Zhou,Chengpeng Yao,Xianjin Ge
Large single crystals of lanthanide hydroxides [Ln(OH) 3 (Ln = La, Pr, Nd, Sm, Eu and Tb)] up to several millimeters have been grown by using solid KOH assisted hydrothermal method. Eu(OH) 3 samples, as a representative of the Ln(OH) 3 crystals, were characterized by X-ray diffraction (XRD), 4-circle single-crystal diffraction, Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS). FESEM image shows hexagonal prism morphology for the Eu(OH) 3 large crystals. Research on the photoluminescence and magnetic properties of Eu(OH) 3 species was conducted.
研究领域:
材料科学
·
光学
·
磁学
✓ 已验证
DOI
高影响因子
TALANTA
·
2026
·
IF 6.7
Lingchao Wang,Nianci Guan,Yun Guo,Xiaofan Li,Hui Guo,Yinzhong Liu,Xiaotao Zhu,Yiyu Qiao,Xuechun Yang
Achieving gas sensors that exhibit excellent sensitivity, selectivity, and rapid response to volatile organic compounds (VOCs) is critically important for effective environmental monitoring applications. In this research, a novel Eu-doped Tourmaline @MOF-ZnO core-shell nanocomposite was designed and fabricated, integrating a MOF-derived porous ZnO shell, a spontaneously polarized tourmaline core, and rare-earth Eu doping. The gas sensing properties of the sensors were systematically investigated across three different test scenarios: (i) at high temperature in the dark, (ii) at high temperature with UV enhancement, and (iii) at room temperature with UV activation. The optimized 0.08 wt% Eu-5 wt% TML-ZnO sensor achieved an exceptional response of 536 to 100 ppm n-butanol at room temperature under UV activation. The response value exceeds that of the pristine MOF-ZnO sensor by a factor of 14.78. Furthermore, the sensor exhibited rapid response/recovery times (39 s and 23 s, respectively), outstanding selectivity and long-term stability, superior detection capability for ultra-low gas concentrations (LOD = 23.35 ppb). This study pioneers a synergistic UV-activated rare-earth doping strategy for TML@MOF-ZnO core-shell nanostructures, enabling room-temperature ppb-level VOCs sensing.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 17
·11432-11440
·
IF 3.9
Yang Hu,Huazhang Zhang,Jing Zhou,Jie Shen,Binbin Chen,Ang Li,Wen Chen
The ferroelectric behavior of Bi1/2(Na0.8K0.2)1/2TiO3 has been tailored by Eu3+ doping and the intermediate relaxor state is utilized for tristate ferroelectric memory effect. As Eu3+ content increases, the local structural disorder tends to get enhanced and the stability of ferroelectric order gets weakened. The disruption effect of Eu3+ is manifested structurally in XRD and PL spectra, and electrically in the ferroelectric, dielectric and piezoelectric properties. We found that the BNKT:3.0%Eu which owns a relaxor state under electrical cycle would be suitable for tristate ferroelectric memory, where two ferroelectric states and the relaxor state are respectively served as the “±1” and “0” memory states. We designed the verification experiments, and the results show good feasibility and stability. Moreover, it is innovative using PL spectra of Eu3+ to understand the structural changes related to different memory states, owning to its sensitivity to local structural symmetry. It also implies the possibility for non-destructive optical readout.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2023
·Vol. 13
·期 10
·3060-3068
·
IF 5
Guanghua Liang,Jianyi Chen,Tao Dou,Zhijie Wu,Xiaofeng Li,Yuanshuai Liu
EU-1 zeolite is employed as an active component of a catalyst for isomerization or hydroisomerization of C8 aromatics (i.e., xylenes, ethylbenzene) in petrochemical processes to increase the para-xylene yield. However, conventional manufacturing of EU-1-based catalysts involves the production of mother liquors for zeolite synthesis which usually contain plentiful unreacted raw materials, or the negative impact of incorporated binders in mass transfer during reactions over shaped catalysts. Herein, we developed a novel route to prepare the monolithic EU-1 zeolite, and used it as an active component of a catalyst for hydroisomerization of ethylbenzene with meta-xylene. Recrystallization of the shaped zeolite precursors composed of incompletely crystallized zeolites with amorphous silica and alumina powders as binders in recycled mother liquor led to formation of the monolithic EU-1 zeolite. Transformation of binder species to a full-zeolitic phase was corroborated comprehensively by characterization methods. Compared with the conventionally fabricated counterpart, the monolithic EU-1 zeolite possessed similar mechanical strength, high crystallinity, and high acidity and, in particular, enhanced mesoporosity, which led to improved catalytic performances in hydroisomerization reactions. Our developed synthetic strategy provides an effective way to produce the monolithic EU-1 zeolite, but is also a reference for the sustainable production of other types of zeolitic materials for energy-related applications.
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Xinlin Wang,Rudong Zhu,Xiangkui Wang,Fengjiao Liu,Yan Gao,Rongfeng Guan,Yalei Chen
In this paper, the application of metal organic frameworks (MOFs) doped with carbon dots in fluorescence detection was studied.CDs@Eu-MOF/PVDF thin films were prepared by simple solvothermal method, carbon dots modification and in-situ growth process.The structure and morphology of the film was characterized by XRD, SEM, FT-IR and XPS.The results show that CDs@Eu-MOFs membrane has strong red fluorescence, good stability in methanol solvent, and high selectivity and sensitivity to nitrobenzene and 4-nitrophenol.The CDs@Eu-MOFs/PVDF film material can be used to detect nitrobenzene and 4-nitrophenol in methanol solvent and gaseous state. The detection limits of nitrobenzene and 4-nitrophenol in liquid are 0.2807 mg/L and 0.0168 mg/L, and the detection limits of nitrobenzene and 4-nitrophenol in gaseous state are 0.346 mg/L and 0.0136 mg/L.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 37
·25681-25690
·
IF 3.9
Jie Liang,Ting Fan,Jian-tao Lü,Tianjie Guan,Ting-ting Deng,Bangyun Xiong
NaGdF4:Ce,Eu,Tb nanocrystals were successfully prepared by a one-step hydrothermal method with Ce3+ ions as sensitizers, Eu3+ and Tb3+ ions as activators, and polyethylenimine (PEI) as surfactants. Color-adjustable fluorescence emission was achieved by the energy transfer effect between rare earth ions. Blue fluorescent carbon quantum dots (CDs) with a double UV response under 254 nm and 365 nm excitation were synthesized by a one-step hydrothermal method. A hydrophilic NaGdF4:Ce,Eu,Tb/CD composite ink was prepared by an easy physical mixing method. Because of the electrostatic self-assembly effect, the color adjustable luminescence was achieved in a few seconds, and the white light emission with color coordinates of (0.32, 0.32) was obtained. A dual-mode luminescence anti-counterfeiting pattern was designed and achieved by excitation with ultraviolet light at 254 nm and 365 nm.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Jie Xiong,Yunfang Xiao,Jiaman Liang,Jian Sun,Lixia Gao,Qiuju Zhou,Dan Hong,Kejun Tan
As we all know, excessive hypochlorite will be transformed into highly toxic substances, while insufficient hypochlorite can not completely kill bacteria and viruses in water. Therefore, it is desirable to develop a new analytical method to detect ClO - in environmental water. Here, a novel and simple fluorescence sensor was constructed for monitoring ClO - by an effective strategy. An Acriflavine@lanthanide metal-organic framework (Acr@Eu(BTEC)) was designed by covalently integrating amino-rich dye (Acr) and carboxyl-rich Eu(BTEC) via post-synthesis method. The created fluorescence sensor has two emission centers originating from Acr and Eu(BTEC), respectively. In the presence of ClO - , the strong green fluorescence derived from Acr was significantly quenched, while the invariant red emission from Eu 3+ acted as the reference signal. Thus, Acr@Eu(BTEC) with two emissions was developed as a ratiometric fluorescence sensor for highly sensitive and selective detection of ClO - . The limit of detection (LOD) was as low as 10.75 nM. Moreover, visual detection of ClO - by the naked eyes is feasible with obvious fluorescent color changes from green to orange and then red. This method shows excellent performance in practical application, which suggests that it has great potential in water quality monitoring.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 19
·7633-7640
·
IF 8.067
Haifeng Sha,Bing Yan
As the basic units of proteins, the importance of amino acids in organisms is self-evident and therefore detection of the concentration of amino acids is significant in monitoring human health. Herein, a dual-responsive Eu3+-functionalized metal–organic framework (MOFs) luminescent film (1@SA) was designed and prepared, which not only realizes the simultaneous detection of aspartic acid (Asp) and arginine (Arg) but also has the possibility of being applied in anti-counterfeiting. A portable film sensor is obtained through the cross-linking and solidification of Eu3+ ions and sodium alginate (SA) hydrogel containing uniformly dispersed MOFs. The MOF used in this work is a zinc metal–organic framework (ZnMOF) comprising uncoordinated carboxyl groups that can provide binding sites for Eu3+ ions. Moreover, it is found that the sensor shows unique fluorescence changes under the stimulation of an acidic environment. Therefore, the quantitative detection of Asp and Arg by 1@SA can be achieved, and optical anti-counterfeiting platforms are also designed according to the diversity of fluorescence changes. The new strategy proposed in this work may broaden the scope of lanthanide fluorescence films used in optical fields.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Yongxiang Wang,Guocan Shen,Ting Tang,Jinming Zeng,Rizwan Ur Rehman Sagar,Xiaopeng Qi,Tongxiang Liang
Electrochromic capacitors are attracting a huge attention due to their dual functions in energy-saving and energy storage. Electrochromic and energy storage performance of the films could be effectively improved through regulating their physical phase and morphology. In the present work, the physical phase and morphology of the WO 3 nanofilms were regulated by doping RE ions (RE = Ce, Eu, Sm, Gd) using one-step hydrothermal technology. The three-dimensional (3D) urchin-like crystal WO 3 nanofilm would transfer into the 3D nest-like WO 3 (WO 3 -RE) nanofilms that consisted of crystal and amorphous phase by doping RE ions. Compared with the pure WO 3 nanofilm, the WO 3 -RE nanofilms exhibited higher optical contrast, faster switching speed, longer cyclic stability, and larger areal capacitance owing to faster ions transfer rate and more stable film structure. The optical contrast of WO 3 -Eu and WO 3 -Sm nanofilms were 76.3% and 73.8% at 633 nm, 75.5% and 74.6% at 900 nm wavelength, respectively. Notably, the WO 3 -Eu and WO 3 -Sm nanofilms could retain 99.6% and 99.1% of their original optical contrasts after 1000 cycles, respectively. Additionally, the areal capacitance of ECDs based on the WO 3 /PB, WO 3 -Ce/PB, WO 3 -Eu/PB, WO 3 -Sm/PB, and WO 3 -Gd/PB were 26.15, 49.27, 58.23, 71.46, and 79.52 mF/cm 2 at 0.3 mA/cm 2 , respectively. ECDs based on the WO 3 -RE/PB are promising for energy-saving and energy storage dual functional smart windows.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Min Fan,Jianxu Zhang,Sen Yin,Jingya Li,Ting Gao,Li Li,Yanyan Zhou,Hongfeng Li
Abstract l-Cysteine (Cys) levels are linked to many health issues and serve as critical diagnostic criteria for various diseases. However, their highly specific recognition and determination from complex biological matrices remain challenging due to interference from biothiol-containing analogs, such as homocysteine (Hcy) and glutathione (GSH). Herein, by strategically positioning eight aldehyde groups at the periphery of a dinuclear Eu(III) helicate, we achieved the specific determination of l-Cys via an induced negative circularly polarized luminescence (CPL) signal (gmax ≈ −1.22, 595 nm). 1H NMR and ESI-MS combined with single-crystal X-ray crystallography and DFT calculations revealed that the size match between the periphery pocket in the helicate and the thiazolidine ring formed by l-Cys and aldehyde cyclization contributed to this CPL response, which creates a large energy difference (∼37.6 kcal/mol) between diastereoisomers and a M-helical preference. While the L-Hcy only resulted in a weak and positive signal (glum ≈ 0.15) due to the larger ring size, the GSH was CPL silent due to the non-cyclization reaction. Benefiting from the large glum value, the probe exhibited the high sensitivity for l-Cys in water or bovine serum albumin (BSA), with a detection limit lower than 8.11 × 10–7 M. Additionally, to facilitate commercial applications, a “test strip-like” hydrogel hybrid film was prepared, which still retains sensing capability to l-Cys. This work therefore provides a strategy for l-Cysteine detection by virtue of induced helical chirality of metallosupramolecules and strong lanthanide CPL.
✓ 已验证
产品关联
DOI
高影响因子
MEASUREMENT
·
2023
·
IF 5.6
Xunlong Zhang,Quangan Cai,Ke Liu,Guilong Yan,Jingyu Chen,Yuanpeng Wu,Zhenyu Li,Li Wang,Han Li
Heavy metal pollutants seriously threaten people’s health. A sensitive, selective, and responsive method for the detection of heavy metal ions is necessary. Herein, flexible robust europium complex/cellulose acetate nanofiber (Eu/CA NF) luminescent membranes were prepared by the electrospinning method. The tensile length of this nanofiber membrane, which can be used in a variety of force scenarios, can be increased by 130% of its original length. These Eu/CA NFs showed unique specificity and good sensitivity in detecting Hg 2+ with its low limit of detection (LOD) of 3.09 μM and a specific recognition of Hg 2+ with a quenching rate of 97.32%. In addition, Eu/CA NF nanofibers were recyclable even after 50 times washing treatment. This study provides a convenient and effective super-sensitive detection thought for a trace amount of Hg 2+ in various water environments.
✓ 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）