JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
·
IF 4.7
Lei Xu,Mao-Ling Luo,Jing-Jing Dai,Huan Zhu,Feng-Qing Yang
Iron ion (Fe(III)) plays a crucial role in many physiological processes, and both excess and deficiency of Fe(III) can lead to diseases. Therefore, developing simple and reliable methods for detecting Fe(III) is of great importance. Based on a novel Mn-based material (coordination of manganese with 2,6-dicarboxypyridine, Mn-DPA) prepared in this study with Fe(III)-enhanced peroxidase-like activity, an efficient fluorescence method was developed for Fe(III) detection. The method demonstrated excellent analytical performance in detecting Fe(III), such as superior selectivity and an extremely low detection limit (0.66 nM). Furthermore, the mechanism of Fe(III) enhancing the enzyme-like activity of Mn-DPA was investigated, and the results suggest that the addition of Fe(III) can promote the generation of active intermediates (hydroxyl radicals) during the reaction. Additionally, Mn-DPA based fluorescence method has been successfully applied to detect Fe(III) in spinach, with recovery rates in the range of 90.9 %–115.6 %. The fluorescence method established in this study holds significant application potential for Fe(III) detection.
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高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2025
·
IF 2
Jin Li,Zhanjun Wang,Xinxin Liang,Aochen Zhang,Zhaolin Gu,Zongkuan Liu
Accurately predicting the shelf-life of single-base propellants loaded in ammunition is crucial for ensuring its safe storage and use. In this study, based on the results of the aging experiments, the reduced time graph method was used to infer the most probable integral mechanism function G ( α ) = 1 − (1 − α ) 1/2 (degree of agreement R 2 = 0.9730), for the DPA consumption reaction, which proceeds via a phase-boundary reaction. Then, based on the research results of G ( α ), with a 50% decrease in the DPA as the failure criterion, the Arrhenius and Berthelot equations were used to establish DPA consumption kinetic models, respectively. The shelf-life prediction equations for single-base propellant were obtained as τ = 6.66 × 10 −17 exp(14 342.78/ T ) and τ = 10 (18.67 − 0.0489 T ) . Finally, the shelf-life predicted by the Arrhenius and Berthelot methods was compared at storage temperatures in the range of 293–338 K. The shelf-life of single-base propellant predicted by the Berthelot method was much shorter than that of the Arrhenius method at storage temperatures in the range of 293–308 K. The Arrhenius method showed a greater dependence on the storage temperature T and DPA reaction rate constant k than the Berthelot method, while the Berthelot method was more dependent on the multiple increase of the k (3.08 times for a 10°C increase in storage temperature). This study provides both theoretical and experimental data support for the accurate prediction of the shelf-life of single-base propellants in ammunition, as well as a reference for the shelf-life prediction of nitrocellulose-base solid propellants.
研究领域:
化学动力学
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材料科学
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高影响因子
Advanced Materials Technologies
·
2022
·Vol. 7
·期 12
·2200370
·
IF 8.856
Junjie Wang,Danyang Li,Yu Luo,Jian Wang,Junbiao Peng
Perovskite light-emitting diodes (PeLEDs) for full-color displays based on inkjet printing technology are increasingly attractive. For potential applications, fabricating high-quality perovskite films with defined-pixel sizes is crucially important. The key issue is how to control the contact properties between the perovskite ink and a hole transport layer (HTL). In this study, a novel strategy is proposed by using the poly[(9,9-bis(3′-((N,N-dimethyl)-N-ethylammonium)-propyl)-2,7-fluorene)- alt -2,7-(9,9-dioctylfluorene)] dibromide (PFN-Br) polar polymer to modify the HTL surface, instead of conventional O 2 plasma method. The PFN-Br can enhance the surface energy of HTLs, including PVK, Poly-TPD, TFB, etc., and improve the wettability of perovskite inks on the HTL due to its polar quaternary ammonium groups. Besides, the PFN-Br acts as the easier nucleation to induce a tiny crystallization of perovskites. On the other hand, the diphenyl phosphate liver (DPA) is first used to mix in perovskite inks to optimize the perovskite film phase distribution and the elimination of uncoordinated Pb 2+ , resulting from interactions between PEA + and DPA, Pb 2+ and DPA, respectively. As a result, a defined-pixel matrix green quasi-2D PeLED with the peak external quantum efficiency over 10% via inkjet printing technique is achieved, which is the most efficient matrix green PeLEDs fabricated by inkjet printing technique so far.
研究领域:
材料科学
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光电子学
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LUMINESCENCE
·
2017
·Vol. 32
·期 7
·1277-1282
·
IF 1.509
Keying Cai,Mulan Zeng,Fenfen Liu,Nan Liu,Zhenzhong Huang,Yonghai Song,Li Wang
An easy and effective strategy for synthesizing a ratiometric fluorescent nanosensor has been demonstrated in this work. Novel fluorescent BSA–AuNPs@Tb–AMP (BSA, bovine serum albumin; AMP, adenosine 5′-monophosphate; AuNPs, Au nanoparticles) metal–organic framework (MOF) nanostructures were synthesized by encapsulating BSA–AuNPs into Tb–AMP MOFs for the detection of 2,6-pyridinedicarboxylic acid (DPA) and Hg 2+ . DPA could strongly co-ordinate with Tb 3+ to replace water molecules from the Tb 3+ center and accordingly enhanced the fluorescence of Tb–AMP MOFs. The fluorescence of BSA–AuNPs at 405 nm remained constant. While the fluorescence of BSA–AuNPs at 635 nm was quenched after Hg 2+ was added, the fluorescence of Tb–AMP MOFs remained constant. Accordingly, a ratiometric fluorescence nanosensor was constructed for detection of DPA and Hg 2+ . The ratiometric nanosensor exhibited good selectivity to DPA over other substances. The F 545 /F 405 linearly increased with increase of DPA concentration in the range of 50 nM to 10 μM with a detection limit as low as 17.4 nM. F 635 /F 405 increased linearly with increase of Hg 2+ concentration ranging from 50 nM to 1 μM with a detection limit as low as 20.9 nM. Additionally, the nanosensor could be successfully applied for the determination of DPA and Hg 2+ in running water.
研究领域:
材料科学
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分析化学
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环境科学
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PubMed
高影响因子
DALTON TRANSACTIONS
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2020
·Vol. 50
·期 4
·1300-1306
·
IF 4.174
Xiao-Yang Zhao,Hui Yang,Wen-Yuan Zhao,Jia Wang,Qi-Shan Yang
Bacillus anthracis is an extremely dangerous bacterium that is associated with high morbidity and mortality. 2,6-Pyridine dicarboxylic acid (DPA) is a major biomarker of Bacillus anthracis, and it is of great significance to be able to detect DPA in a rapid, efficient, and sensitive way. Herein, a 3D network metal–organic framework (Tb-MOF) with excellent thermal and water stability was synthesized. Tb-MOF could be used to selectively detect DPA via green fluorescence recovery with a fluorescence intensity enhancement factor of 103. In addition, due to the high detection sensitivity (a detection limit of 2.4 μM) and excellent anti-interference abilities, Tb-MOF was less affected by environmental factors when compared with a “turn-off”-response luminescence sensor; it can be employed as a promising “turn-on” luminescence sensor for DPA in the future. Finally, quantum calculations showed that a large energy difference appeared between the 5D4 level of Tb3+ and the first excited triplet energy level of H2-DHBDC2−, which was the reason that the complex did not show characteristic Tb3+ emission.
研究领域:
生物化学
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材料科学
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医学检测
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2017
·
IF 5.401
Juan Hao,Fenfen Liu,Nan Liu,Mulang Zeng,Yonghai Song,Li Wang
Here, a novel fluorescent carbon dots (CDs)@Eu-2, 6-pyridinedicarboxylic acid (DPA) metal organic frameworks (MOFs) was synthesized by encapsulating CDs into the Eu-DPA MOFs for the detection of Cu 2+ . The as-prepared CDs@Eu-DPA MOFs fluorescent probe was investigated by transmission electron microscopy, Fourier transform-infrared spectroscopy and fluorescence spectroscopy. The results showed the CDs@Eu-DPA MOFs exhibited the uniform ball-flower-like nanostructures and were very stable in aqueous solution due to their nanoscaled size and the ball-flower-like nanostructures. The CDs@Eu-DPA MOFs could emit two kinds of fluorescence which originated from CDs and Eu-DPA MOFs, respectively under a single wavelength excitation at 275 nm. In the presence of Cu 2+ , the fluorescence of Eu-DPA MOFs decreased and the fluorescence of CDs kept constant to result in ratiometric fluorescent response toward Cu 2+ when they were used as the recognition parts and the reference, respectively. The obtained CDs@Eu-DPA MOFs for the detection of Cu 2+ showed a wide linear range (50 nM–10 μM) and a low detection limit (26.3 nM) with high sensitivity, stability and selectivity. The work provides a good method to construct fluorescent sensors based on MOFs.
研究领域:
材料科学
·
分析化学
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高影响因子
MICROCHIMICA ACTA
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2022
·Vol. 190
·期 1
·1-11
·
IF 6.408
Xu Yixuan,Shi Xuerong,Ran Fanpeng,Zhang Ziqi,Phipps Josh,Liu Xiaoyan,Zhang Haixia
A novel Tb-doped Eu-based metal–organic framework (Eu-MOF@Tb) has been developed by incorporating hexanuclear europium cluster and 2,2′-bipyridine-5,5′-dicarboxylic acid as well as coordination with Tb(III). Owing to the diverse coordination status of Tb(III) and Eu(III) in MOF, antenna effect emission from Tb(III) can be invoked by dipicolinic acid (DPA), but the luminescence originating from Eu(III) remains unchanged. Taking advantage of this phenomenon, a ratiometric luminescent method for detection of DPA, a biomarker for Bacillus subtilis spores, was developed through differential sensitization toward lanthanide ions. This analysis method allowed for the detection of DPA in the 0.2–10 μM concentration range, with a detection limit of 60 nM. It was further validated by spiked recoveries (89.3–110%) of real-world samples with RSD values in the range 3.9–11%. Alongside this, a paper indicator test was prepared for naked-eye detection of DPA via a dose-sensitive color evolution from red to green under UV light. The effectiveness of the proposed approach was explored in the detection of bacterial spores in real biological and environmental samples and indicated great potential for applications as a real-time monitoring system against the anthrax threat. Graphical Abstract
研究领域:
分析化学
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生物化学
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环境科学
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PubMed
高影响因子
DYES AND PIGMENTS
·
2025
·
IF 4.2
Runze Jia,Xianju Zhou,Li Li,Yongjie Wang,Guotao Xiang,Ruiheng Pan,Chuan Jing,Huajing Gao
Multi-stimuli responsive smart materials have garnered increasing attention in recent years. A series of lanthanide organic complexes [Ln 3 (DPA) 3 TMA]·3H 2 O (Ln = Eu, Tb, Eu x Tb 1-x , H 3 TMA = 1,3,5-benzenetricarboxylic acid, H 2 DPA = 2,6-pyridinedicarboxylic acid) were obtained through solvothermal method. The complexes exhibit an outstanding temperature sensitivity in the range of 288-378 K, with a high relative sensitivity of Sr = 10.12% K -1 at 378 K. Furthermore, the complexes show good selectivity and sensitivity to Fe 3+ and Cu 2+ ions, as well as acetone, allowing for rapid and accurate determination of Fe 3+ ions with a detection limit (LOD) of 1.587 ppm. The complexes respond quickly to the stimulus of acetone, with luminescence quenching in the range of 0-100 μl of acetone into 4 ml complexes inks obeying the Stern-Volmer equation with LOD = 5.77 ppm. Interestingly, the complexes exhibit different luminescent responses under pH conditions. In acidic solution, due to the detachment of TMA ligand, the excitation spectrum of the complex shows a blue shift, demonstrating dual response to pH and light stimuli. Even in strong alkalinity, the complexes still maintain intense emission. Therefore, binuclear complexes undergo color tuning after acid-base cycling. For Eu 0.03 Tb 0.97 -TMA-DPA, it changes from yellow to orange and then to yellow-green after acid-base cycling. Eu 0.1 Tb 0.9 -TMA-DPA, on the other hand, changes from orange to green and finally to yellow. An encryption key based on this interesting pH stimuli response has been designed and demonstrated its potential in the field of anti-counterfeiting applications.
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ANALYTICAL CHEMISTRY
·
2017
·
IF 6.32
Xiang-Ru Bai,Yi Zeng,Xiao-Dong Zhou,Xiao-Hua Wang,Ai-Guo Shen,Ji-Ming Hu
Field, reliable, and ultrasensitive detection of dipicolinic acid (DPA), a general biomarker of bacterial spores and especially Bacillus anthracis, is highly desirable but still challenging in current biometric security emergency response system. Herein we report an environmentally safe mercury(II) ions-mediated and competitive coordination interaction based approach for rationally designed surface-enhanced Raman scattering (SERS)-active gold nanoparticles (AuNPs), enabling rapid, ultrasensitive and zero-background detection of DPA without the pretreatment of samples. By means of competitiveness, these papain-capped gold nanoparticles (P-AuNPs) are induced to undergo controllable aggregation upon the addition of Hg2+ ions and DPA with a concentration range (1 nM∼8 μM), which correspondingly cause quantitative changes of SERS intensity of cresyl violet acetate (CVa) conjugated AuNPs. The decreased Raman intensity obtained by subtracting two cases of additives that contain only Hg2+ and the mixture of Hg2+ and DPA is proportional to the concentration of DPA over a range of 1 nM∼8 μM (R2 = 0.9824), with by far the lowest limit of detection (LOD) of 67.25 pM (0.01 ppb, S/N = 3:1). Of particular significance, mercury(II) ions actually play two roles in the process of measurements: a mediator for two designed competitive ligands (DPA and papain), and also a scavenger for the possibly blended ligands due to the different interaction time between DPA and the interferent with Hg2+ ions, which guarantees the interference-free detection of DPA even under real conditions.
研究领域:
分析化学
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生物医学
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环境科学
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PubMed
高影响因子
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Yuqi Huang,Tiange Li,Mengmeng Lei,Xianqing Huang,Tianlin Wang
In the present investigation, we demonstrated a simple approach for the reproducible synthesis of cerium(III)-based blue phosphor, which provides versatile applications in the construction of warm white-light-emitting diodes (WLEDs) and anticounterfeiting patterns. It is found that the mixture of dipicolinic acid (DPA) with Ce3+ in ethanol (DPA-Ce) emits blue fluorescence under the assistance of ultraviolet (UV) induction. The quantum yield of the DPA-Ce phosphor reaches 44% and is improved to 52% by combining with guanosine 5′-monophosphate (GMP). The obtained DPA-Ce-GMP emits blue fluorescence in both a solid powder and aqueous solution, having advantages of long luminescence lifetimes, ultralong stability, and outstanding antitemperature bleaching. With DPA as a universal ligand, DPA-Tb with green fluorescence and DPA-Eu with red fluorescence are integrated with the blue fluorescence of DPA-Ce-GMP to construct full-color and white-light-emitting devices. The as-prepared warm WLED with a quantum yield of 64% presents an excellent stability and high quality with a color rending index of up to 90, CIE color coordinates of (0.37, 0.36), a correlated color temperature of 3950 K, and a luminous efficiency of 37.8 lm W–1. Multiple anticounterfeiting patterns are further encoded with the as-prepared lanthanide-based phosphors. The investigation offers a simple assay for the cost-effective, large-scale synthesis of phosphors, with great promise in diverse applications including the lighting industry and anticounterfeiting technology.
研究领域:
材料科学
·
光学工程
·
应用化学
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Shuang Mi,Xulin Hu,Zhidong Lin,Tianfang Huang,Hua Yang,Junlin Lu,Qing Li,Luyao Xing,Jian He,Chengdong Xiong
Porous biodegradable bone scaffold is a remarkable strategy for bone-tissue engineering. It is well known that some basic requirements such as the biodegradabilty, biocompatibility, porous structure, surface properties, mechanical properties and plasticity of the scaffolds are vital for new bone formation. In this article, we adopted a low temperature method and poly (dopamine) coating strategy to fabricate porous shape-memory poly ( L -lactide-co-trimethlyene carbonate)/calcium sulfate hemihydrate-poly (dopamine) microsphere scaffolds with uniform microstructure. Compared with PLLA-TMC microspheres, PLLA-TMC/CSH and PLLA-TMC/CSH-dPA microspheres have rougher surface and increased Tg . The mechanical properties and biodegradability of scaffolds were also tested in vitro, and the biocompatibility and osteoconductivity were monitored by CCK-8 and ALP activity assay using MC3T3-E1 cells. Strikingly, compared with PLLA-TMC scaffolds, PLLA-TMC/20CSH scaffolds possessed an enhanced initial compression modulus and higher degradation rate . Meanwhile, the compression modulus of all P/CSH scaffolds matched the cancellous bone during degradation period (103.04–623.75 MPa). Moreover, the PLLA-TMC/CSH-dPA microsphere scaffolds were non-toxic and contributed to cell adhesion. In summary, the prepared PLLA-TMC/CSH-dPA microsphere scaffold in this work is a promising approach for bone-tissue engineering.
研究领域:
骨组织工程
·
生物材料学
·
再生医学
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2026
·
IF 4.1
Yi Jintao,Fu Nani,Zhong Wenhui,Liu Xia,Zhou Anqi,Li Xun
Amoxicillin (AMO), a penicillin antibiotic, and ciprofloxacin (CIP), a quinolone antibiotic, are widely used to combat bacterial infections and are frequently co-administered to enhance therapeutic efficacy. However, improper use of AMO and CIP may lead to antibiotic residues in the environment, posing serious threats to human health. The visual detection of AMO and CIP remains significant challenges. Herein, the Eu-DPA@CQDs was used for the dual-mode detection of AMO and CIP, which was synthesized by CQDs doped in europium-DPA metal-organic framework. In the colorimetric mode, the catalase-mimicking Eu-DPA@CQDs oxidized TMB to blue oxTMB. Upon addition of AMO, the oxTMB was reduced, causing color fading. Subsequent introduction of CIP restored nanozyme activity, regenerating the blue signal and enabling dual-analyte antibiotic detection. In the fluorescence mode, the Eu-DPA@CQDs probe exhibited dual emission at 440 nm and 613 nm. Upon AMO addition, the fluorescence at both wavelengths was quenched, accompanied by a color change from red to purple. In the presence of CIP, the emission at 440 nm increased and redshifted to 490 nm, while the signal at 613 nm was quenched, resulting in a multicolor transition from red to cyan. The Eu-DPA@CQDs sensor enabled rapid and dual-mode detection of AMO and CIP. The colorimetric method exhibited wide linear ranges of 0.005–25 μM for AMO and 0.007–4.25 μM for CIP, with detection limits of 1.67 nM and 3.75 nM, respectively. A visible color transition from dark blue to colorless was observed with increasing AMO concentration, while the addition of CIP reversed the signal back to dark blue. Similarly, the fluorescence detection achieved wide linear ranges from 0.005 to 30 μM for AMO and 0.005 to 15 μM for CIP, with detection limits as low as 4.74 nM and 3.11 nM, respectively, also within only 1 min. As the concentration of AMO increased, the color shifted from red to purple. In contrast, increasing CIP concentration induced a color transition from red to cyan. These color transitions were both clearly visible to the naked eye. The sensor demonstrated excellent selectivity and anti-interference capability, providing a reliable platform for accurate, sensitive, and quantitative determination of both antibiotics in real samples. Graphical abstract
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高影响因子
危险品化学品经营许可证（带存储）