JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Maolin Liu,Changqing Lin,Weicheng Ou,Zehui Lu,Jiayi He,Xiaojie Chen,Fengbin Liu,Guoxiao Lin,Guojie Xu,Han Wang,Chunyang Pan
Cu:CsPbCl x Br 3-x quantum dots (QDs) with different Cu-to-Pb molar ratios were synthesized via a solvent-based thermal synthesis method, and highly stable blue-light PCL@Cu:CsPbCl x Br 3-x composite fibers (CFs) were prepared by electrohydrodynamic (EHD) technology. The photoluminescence (PL) properties of these Cu 2+ -doped Cu:CsPbCl x Br 3-x QDs and the stability of polymer encapsulation were investigated in this study. The results showed that with increasing Cu 2+ concentration, the CsPbCl 1.5 Br 1.5 QDs maintained their initial cubic crystal structure. The doping of Cu 2+ ions effectively eliminated the surface defects of CsPbCl 1.5 Br 1.5 QDs, facilitating excitonic recombination through radiative pathways. The PL quantum yield (PLQY) of Cu:CsPbCl 1.5 Br 1.5 QDs increased to 85%. In addition, The fiber encapsulation method effectively improved the stability of the Cu:CsPbCl 1.5 Br 1.5 QDs, After 3 days in water, the fluorescence intensity still remains at the initial 90%. Based on these results, it is believed that Cu:CsPbCl 1.5 Br 1.5 QDs have promising applications in optoelectronic devices in the future.
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Brian Musikavanhu,Xin Huang,Quanhong Ma,Zhaoli Xue,Lei Feng,Long Zhao
A novel rhodamine-benzothiazole fluorescent chemosensor, bridged with a thiophene unit, is designed for the turn-on detection of Hg 2+ and Cu 2+ . Noteworthy findings include impressively low limits of detection (0.007 μM for Hg 2+ and 0.013 μM for Cu 2+ ), a determined sensing mechanism involving spirolactam ring opening and hydrolytic cleavage, consistent 1:1 binding stoichiometry for both metal ions and an optimal pH of around 6. The sensor’s practical applicability is demonstrated through successful implementation in HeLa cells and zebrafish, along with effective analyte recovery in various water samples. This work advances the field by providing a highly sensitive and versatile chemosensor for environmental and biological applications.
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高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 12
·830
·
IF 5.3
Hou Hongming,Long Jiajun,Li Xianglong
The chelation interaction between sodium lignosulfonate (SLS) and Cu 2+ is exploited to construct an enzyme-free creatinine sensing electrode (SLS-Cu/SPCE) via one-step electrodeposition on screen-printed carbon electrodes (SPCE). SLS chelation moderates Cu 2+ electro-reduction kinetics, resulting in finely structured Cu particles with a uniform and dense distribution. These Cu particles, with abundant unsaturated coordination sites, enhance creatinine adsorption and promote specific complexation with Cu 2+ , thereby increasing the oxidation current response for sensitive detection. The SLS-Cu/SPCE achieved a 0.12 µM detection limit, a 10–300 µM linear range, high reproducibility, and long-term stability over 28 days. Tests in human urine samples showed good agreement with enzymatic assays (relative error < 16%). The SLS-Cu 2+ coordination strategy offers a novel approach for optimizing Cu-based enzyme-free electrochemical creatinine sensors. Graphical A sodium lignosulfonate-Cu 2+ chelation strategy produces refined copper particles on SPCE with abundant unsaturated sites. These sites enhance creatinine adsorption and Cu 2+ complexation, enabling highly sensitive non-enzymatic detection (0.12 μM LOD, 10-300 μM range) with strong anti-interference and excellent stability.
研究领域:
电分析化学
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生物传感器
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纳米材料
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环境与临床监测
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DOI
PubMed
高影响因子
HETEROCYCLIC COMMUNICATIONS
·
2014
·Vol. 20
·期 5
·289-292
·
IF 0.727
Wei Wang,Wen-Jing Yuan,Qing-Lei Liu,Ya-Nan Lei,Shuai Qi,Yan Gao
Novel triazole Schiff-base derivative 3 bearing a coumarin unit was synthesized by the reaction of 4-formylbenzocoumarin ( 1 ) with 3,5-diphenyl-4-amino-1,2,4-triazole ( 2 ). The structure of the product was characterized by means of IR, MS, 1 H NMR, 13 C NMR, and elemental analysis. The UV-vis absorption and fluorescence emission spectra of compound 3 exhibit blue-shifted absorption and fluorescent enhancement upon chelation to cupric ion. Fluorometric titration revealed a 2:1 ligand to metal ratio in the complex and the binding constant of 4.62×10 6 m -1 .
研究领域:
分析化学
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材料科学
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高影响因子
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Junji Xuan,Jintao Tian
A spiropyran derivative containing an ethyl group ( SPEt ) was applied for fluorescent recognition of Cu 2+ . With Cu 2+ addition, the SPEt -contained solution using a mixed solvent of DMF/H 2 O (9/1, v/v) showed a very strong characteristic emission peak with high quantum yield which is 4.3 times that of the pure SPEt solution. As a result, Cu 2+ was successfully picked out from totally 17 kinds of common metal ions and a detection limit as low as 14.9 fM had been achieved in using this assay system. Particularly, the recognition process was temperature- and time-dependent and could be effectively promoted by heating. In addition, SPEt had been used to image and detect Cu 2+ in mussels. Thus, our results in this study provided an exclusive Cu 2+ recognition via fluorometry in wide temperature, time, and dynamic ranges of assay, enabled a femtomolar scale detection of Cu 2+ by spiropyran derivative, and showed a promising imaging ability of Cu 2+ in marine living organisms.
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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高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Zhenhua Li,Guotao Sun,Christopher D. Snow,Yanan Xu,Yao Wang,Dan Xiu,Yu Zhang,Zhijun Zhu,Laurence A. Belfiore,Jianguo Tang
DNA-based high-performance rare-earth materials were synthesized for the first time to enhance the near-infrared fluorescence of Yb 3+ and to provide a sensory response to Cu 2+ and Fe 3+ . Yb 3+ , TTA, phen and DNA were coordinated in an ethanol solution. The mixture produced a stable DNA material under the action of stirring and ultrasound. By changing the ratio, the morphology and luminous properties of the product were controlled. The addition of DNA increased the luminescent intensity of Yb 3+ complexes three folds. Earlier reports investigated Yb 3+ complexes fluorescence in the visible range or reported weak near-infrared emission. The rare-earth materials we synthesized herein have significantly increased near-infrared fluorescence intensity of Yb 3+ , and significantly improved biocompatibility. Potential applications for DNA-coordinated Yb 3+ complexes include the detection of Cu 2+ and Fe 3+ in vitro and in vivo , taking advantage of good penetration of IR through human tissue in the window 950 nm to 1050 nm.
研究领域:
材料科学
·
分析化学
·
生物化学
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高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Tao Liu,Shaohua Gou,Yang He,Shenwen Fang,Lihua Zhou,Guangjun Gou,Lang Liu
In this paper, N -methylene phosphonic acid chitosan (NPCS-PEI) was synthesized from chitosan, phosphorous acid , formaldehyde and hyperbranched polyethyleneimine (PEI), and Cu 2+ and Pb 2+ removal performance was examined in aqueous solution. NPCS-PEI exhibited three-dimensional porous architectures, with a specific surface area of 490.61 m 2 /g. The effects of pH, initial concentration, adsorption time, temperature and ionic strength on the adsorption capacity were investigated. The adsorption kinetics indicated that Cu 2+ and Pb 2+ adsorption onto NPCS-PEI follows a pseudo-second-order model. The adsorption isotherms agree well with the Langmuir isotherm model, and the maximum adsorption capacities of Cu 2+ and Pb 2+ on the NPCS-PEI are approximately 276.12 and 645.16 mg/g, respectively. The adsorption efficiency of NPCS-PEI remained above 85% after 5 adsorption-desorption successive cycles. Moreover, the NPCS-PEI aerogels had selective adsorption toward Cu 2+ . The FTIR and XPS analysis proved that amino, hydroxyl, and phosphonic acid groups were involved in the chelation with metal ions .
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-12
·
IF 3.8
Niu Yanhui,Yu Wenbin,Yang Shuguang,Wan Quan
This research delved into the influence of mesoporous silica’s surface charge density on the adsorption of Cu 2+ . The synthesis of mesoporous silica employed the hydrothermal method, with pore size controlled by varying the length of trimethylammonium bromide (C n TAB, n = 12, 14, 16) chains. Gas adsorption techniques and transmission electron microscopy characterized the mesoporous silica structure. Surface charge densities of the mesoporous silica were determined through potentiometric titration, while surface hydroxyl densities were assessed using the thermogravimetric method. Subsequently, batch adsorption experiments were conducted to study the adsorption of Cu 2+ in mesoporous silica, and the process was comprehensively analyzed using Atomic absorption spectrometry (AAS), Fourier transform infrared (FTIR), and L3 edge X-ray absorption near edge structure (XANES). The research findings suggest a positive correlation between the pore size of mesoporous silica, its surface charge density, and the adsorption capacity for Cu 2+ . More specifically, as the pore size increases within the 3–4.1 nm range, the surface charge density and the adsorption capacity for Cu 2+ also increase. Our findings provide valuable insights into the relationship between the physicochemical properties of mesoporous silica and the adsorption behavior of Cu 2+ , offering potential applications in areas such as environmental remediation and catalysis.
研究领域:
材料科学
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环境科学
·
化学
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PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
·
IF 7.46
Yuqian Liu,Farzad Seidi,Chao Deng,Ruyi Li,Tingting Xu,Huining Xiao
Exploring sensory systems from metal ion receptors enables the continuous development of ion sensing technologies. Herein we report the synthesis of carbon quantum dots (CQDs) from 5,10,15,20-tetrakis(4-sulfophenyl)porphyrin (TSPP) and additional carbon source, and its application in Cu 2+ imaging and quantifying in living cells. The CQDs are synthesized via a hydrothermal method in a successive polymerization and carbonization process. Due to the surface traps introduced by TSPP residue, the CQDs are featured with dual-emissive property of green (505 nm) and red (682 nm) fluorescence. Moreover, the red-to-green fluorescence ratio is readily customizable by tuning the molar fraction of TSPP. Benefited from Cu 2+ complexation induced red fluorescence quenching, the CQDs can be served as the ratiometric fluorescent nanosensor for Cu 2+ detection with ultra-high sensitivity and excellent specificity. The nanosensor is demonstrated to linearly detect Cu 2+ in the range of 0−50 nM, with an extremely low limit of detection (LOD) of 37 pM. More importantly, interference from other biological compositions, especially Fe 3+ , is successfully excluded via the site-selective coordination and specific electron transfer path. Based on the excellent analytical performance of the nanosensor, quantifying Cu 2+ in living cells is realized according to the linear correlation between fluorescence ratio and intracellular Cu 2+ content, which is parallelly detected by inductively coupled plasma mass spectrometry (ICP-MS). To demonstrate its practicality, the nanosensor is challenged to measure Cu 2+ uptake kinetics for cell lines derived from different tissues.
研究领域:
生物传感
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材料科学
·
分析化学
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高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Jiali Jiang,He Li,Tao Fu,Bing-Joe Hwang,Xue Li,Jinbao Zhao
In this work, nonstoichiometric Cu2–xSe fabricated by a facile water evaporation process is used as high-performance Al-ion battery cathode materials. Cu2–xSe electrodes show high reversible capacity and excellent cycling stability, even at a high current density of 200 mA g–1, the specific charge capacity in the initial cycle is 241 mA h g–1 and maintains 100 mA h g–1 after 100 cycles with a Coulombic efficiency of 96.1%, showing good capacity retention. The prominent kinetics of Cu2–xSe electrodes is also revealed by the GITT, which is attributed to the ultrahigh electronic conductivity of the Cu2–xSe material. Most importantly, an extensive research is dedicated to investigating the detailed intercalation and de-intercalation of relatively large chloroaluminate anions into the cubic Cu2–xSe, which is conducive to better understand the reaction mechanism of the Al/Cu2–xSe battery.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Ning Li,Wenwen Zhao,Linping Li,Yangqin Gao,Lei Ge
Photocatalysts with hollow structures have drawn great interest owing to their high specific surface area, which can enhance the photocatalytic performance. Herein, we designed the hollow cubic Cu2–xS@Ni–Mo–S nanocomposites by vulcanizing from the Cu2O template and loading the Ni–Mo–S lamellas. The Cu2–xS@Ni–Mo–S composites greatly improved the photocatalytic hydrogen performance. Among them, Cu2–xS–NiMo-5 achieved the optimal photocatalytic rate of 1326.07 μmol/g h, which is approximately 3.85 times higher than that of hollow Cu2–xS (344 μmol/g h) and had good stability for 16 h. The enhanced photocatalytic property was attributed to the metallic behavior of bimetallic Ni–Mo–S lamellas and the LSPR (localized surface plasmon resonance) effect of Cu2–xS. The bimetallic Ni–Mo–S can effectively capture the photogenerated electrons and quickly transfer-diffuse to produce H2. Meanwhile, the hollow Cu2–xS not only provided many more active sites to take part in the reaction but also introduced the LSPR effect to increase the solar utilization. This work provides valuable insights into the synergistic effect of using non-precious metal co-catalysts and the LSPR materials to assist in the photocatalytic hydrogen evolution.
研究领域:
材料化学
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光催化
·
能源科学
·
纳米材料
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半导体物理
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可再生能源
·
表面科学
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 93
·76296-76301
·
IF 3.84
Liyan Huang,Biao Gu,Wei Su,Peng yin,Haitao Li
Two novel ESIPT-based fluorescent probes, N-(2-(1-(p-tolyl)-1H-phenenanthro[9,10-d]imidazol-2-yl)phenyl) picolinamide (Pi-A) and 2-(1-(p-tolyl)-1H-phenanthro[9,10-d]imidazol-2-yl)phenylpicolinate (Pi-E), were designed and synthesized. The favorable features of the proposed probes included excellent water solubility, wide pH range, high selectivity and sensitivity to Cu2+. Interestingly, the difference in the linker of the probe molecules led to a radical change in the fluorescent response of the probes to Cu2+. Pi-A showed fluorescence turn-off towards Cu2+ with a detection limit of 1.6 × 10−9 M and Pi-E showed fluorescence turn-on towards Cu2+ with a detection limit of 1.8 × 10−8 M in the same condition. The Cu2+ recognition mechanisms of the probes were investigated by Job's plot analyses, NMR and ESI-MS spectroscopy experiments. Moreover, our experiments also showed that the probes are of excellent cell permeability and are capable of imaging Cu2+ within living cells.
研究领域:
分析化学
·
传感器与探针
·
无机化学
·
生物成像
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高影响因子
危险品化学品经营许可证（带存储）