INORGANICA CHIMICA ACTA
·
2025
·
IF 3.2
Qian Sun,Lu Ren,Jing Wang,Kun Bai,Chang Liu,Yanqi Liu,Dawei Zhang
Coumarin-structured ( E )-7-(diethylamino)-3-(1-(2-(4-methylbenzo[ d ]thiazol-2- yl)hydrazono)ethyl)-2 H -chromen-2-one (HTM) was synthesized in two steps using N , N -diethylsalicylaldehyde, ethyl acetoacetate and 4-methyl-2-hydrazine-benzothiazole as raw materials. The HTM was characterized by FT-IR, 1 H NMR, 13 C NMR and HR-MS. It was found that the probe HTM has rapid and highly selective recognition ability for Cu 2+ in EtOH/H 2 O (1:1, v /v). The spectral characteristics of the probe HTM were investigated using fluorescence spectroscopy and ultraviolet-visible spectroscopy. The results showed that the binding of probe HTM to Cu 2+ produced a significant fluorescence quenching effect, and the influence of other metal ions was negligible. In visible light, when HTM interacts with Cu 2+ , the solution changes from yellow to orange as observed by the naked eye. Subsequently, the binding mechanism of the probe HTM to Cu 2+ was explored by Job's plot, 1 H NMR titration and DFT calculations, and it was found that they cooperated in a 1:1 manner. Linear equations for ultraviolet-visible and fluorescence intensities at different Cu concentrations were fitted, and the detection limits (LOD) were calculated to be 5.22 nM and 3.70 nM, respectively. Experimental studies on the recovery rates of standard additions indicated that the probe HTM could be used for the quantitative detection of Cu 2+ in actual water samples. The potential application of this probe in fingerprint detection was also investigated. In addition, the probe has been successfully applied to Cu 2+ monitoring in living cells.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
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IF 8.5
Amatjan Sawut,Yurou Feng,Rena Simayi,Manfang Pan
Heavy metal ion pollution in wastewater, particularly Cu 2+ contamination, threatens ecology and human health, demanding efficient adsorption materials in environmental remediation. However, conventional adsorbents suffer from insufficient capacity, poor mechanical stability, weak selectivity, and low reusability, restricting their practical application. Herein, a semi-interpenetrating network composite hydrogel (ZIF-8-AVA) was fabricated via in situ self-assembly, integrating ZIF-8 nanocrystals into a poly(acrylamide- co -vinylimidazole)/sodium alginate (AVA) matrix. Vinylimidazole units served as nucleation anchors, firmly immobilizing ZIF-8 on the polymer backbone via metal-ligand coordination to form a stable system. ZIF-8 significantly enhanced AVA's mechanical properties and Cu 2+ adsorption performance: the composite followed the Langmuir monolayer adsorption model with a maximum adsorption capacity of 355.9 mg/g, achieving 93.81% Cu 2+ removal efficiency at an initial concentration of 50 mg/L. Furthermore, the ZIF-8-AVA hydrogel exhibited excellent selectivity for Cu 2+ in multi-competing-ion systems and maintained high adsorption efficiency after 5 consecutive adsorption-desorption cycles. The key innovation lies in the in situ self-assembly strategy that realizes the intimate integration of ZIF-8 with the hydrogel matrix via coordination-driven anchoring, overcoming the common issue of MOF particle leaching and synergistically enhancing adsorption capacity, selectivity, and mechanical stability. This work offers a novel approach for tunable MOF hydrogels, with great potential in heavy metal wastewater treatment.
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PubMed
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9
Yan Zhao,Jun Yao,Ning Min,Bo Ma,Wenping Chai,Yvqing Ma
Acid mine drainage (AMD) originates from mineral extraction and processing operations, exhibiting high acidity and containing elevated concentrations of metals and sulphates, which frequently pose significant environmental challenges. This study combined biochar with clay minerals to prepare two magnetic biochar-montmorillonite composites (FMBC1 and FMBC2) via coprecipitation-pyrolysis and impregnation-pyrolysis methods for investigating their removal efficiency and mechanisms for Cu, Pb, and Cd from metal solutions. Adsorption results indicate that at a dosage of 1.5 g/L, both FMBC1 and FMBC2 achieve removal efficiencies exceeding 99% for Cu (100 ppm), Pb, and Cd (50 ppm). Material characterization revealed that functional group complexation, crystallization-precipitation, possible ion exchange and reduction precipitation were the mechanisms by which FMBC1 and FMBC2 interact with Cu, Pb, and Cd in solution. Furthermore, FMBC1 and FMBC2 effectively removed Cu, Pb, and Cd from synthetic wastewater and could be recovered rapidly via magnetic attraction. Following desorption with EDTA-HCl, adsorbed FMBC1 and FMBC2 can be reused. The findings of this study provide potential theoretical foundation for treating heavy metals in AMD.
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LUMINESCENCE
·
2026
·Vol. 41
·期 8
·e70602
·
IF 2.8
Long Liu,Shaoyun She,Qihuan Chen,Yichen Li,Xiaotong Deng,Meijun Ye,Jiamin Liu,Hanqing Wu,Jingshui Xu
As a common heavy metal pollutant, Cu 2+ seriously endangers environmental safety and human health. A novel triphenylamine-based Schiff base fluorescent probe (triphenylamine-diaminopyridine, TPA-DAP) was synthesized with diaminopyridine as the recognition unit. It exhibits high selectivity, rapid response, large stokes shift, low detection limit of 1.04 μM, obvious fluorescence quenching, and visible color changes toward Cu 2+ . Cu 2+ binds with TPA-DAP to form a stable 2:1 complex and quenches fluorescence through electronic and paramagnetic effects, which can be reversed by vitamin C. The sensing mechanism was verified by HRMS, NMR, and DFT calculations. TPA-DAP achieves effective Cu 2+ detection in actual water samples. The prepared TPA-DAP@PVA/SA composite membrane establishes a fluorescence-afterglow dual-mode platform for portable visual on-site Cu 2+ detection.
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JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 4.4
You Mei,Zhou Zixuan,Yan Xinying,Xie Haotian,Chen Xueke,Zhang Jing,Liao Fusheng,Wei Guobing,Fan Hao,Yin Zhaojiang
In this study, we developed a fluorescent sensor based on a pyrene-derived covalent organic framework (PT 2 D-COFs) for the efficient and sensitive detection of copper ions (Cu 2+ ) and iron ions (Fe 3+ ). The PT 2 D-COFs are synthesized via a Schiff base reaction, exhibiting high crystallinity, excellent porosity, and remarkable chemical stability, which provide ideal coordination sites for the effective recognition of metal ions. The results demonstrate that the PT 2 D-COFs exhibit significant fluorescence quenching upon interaction with Cu 2 ⁺, with a detection limit (LOD) of 0.79 nM, while fluorescence enhancement is observed in the presence of Fe 3+ , with an LOD of 0.47 nM. and reproducibility in complex sample matrices. It was effectively utilized to quantify Cu 2+ and Fe 3+ in environmental water samples and traditional Chinese herbal medicines, achieving satisfactory recovery rates. This sensor demonstrates characterized by its low detection limits, strong anti-interference capability, and broad application potential, holds significant promise for applications in environmental monitoring and bioanalysis. Graphical abstract
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Zijia Jin,Yao Li,Zhenhui Yue,Feng Zhao,Zhen Lei
Thiram (Thr) residues pose potential risks to ecological environment and human health. Herein, a simple multi-channel colorimetric assay for Thr detection was proposed. Cu 2+ served as the colorimetric probe, and coordinated with Thr, forming Cu 2+ -Thr complex with satisfactory oxidase (OXD)-like and laccase (LAC)-like activity. The catalytic kinetics of Cu 2+ -Thr complex well fitted Michaelis-Menten model. Leveraging Thr activated OXD and LAC-like activities of Cu 2+ , colorimetric assays for Thr detection were developed. The detection range and limit of detection of this method were comparable to those methods involving nanomaterials. By integrating smartphone with test papers and test swabs, two portable sensing platforms were developed to achieve on-site detection of Thr. The concentrations of Thr in food and water samples were successfully determined via multiple channels with satisfactory recoveries and relative standard deviation. The simple and low-cost multi-channel colorimetric sensing platforms showed potential for food safety analysis and environmental monitoring.
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JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Xue Guo,Jiahui Cao,Yang Liu,Kun Zhao,Hui Peng,Jianbo Xiong,Bitao Su,Xiaobo Zhang,Ming Zhong
The integration of heterostructure engineering with carbon materials exhibits significant advantages in enhancing ion transport efficiency and stability, buffering volume changes, and improving electrochemical lithium/sodium storage performance of transition metal selenide electrodes. In this study, we employ binary metal-organic frameworks as the precursors to successfully prepare rod-shaped composites assembled by carbon-coated bimetallic heterostructure nanoparticles (Cu 2-x Se/Bi 2 Se 3 @C) through a controlled selenization process at varying temperatures. The optimized Cu 2-x Se/Bi 2 Se 3 @C-600 composite demonstrate exceptional lithium storage capabilities, achieving high reversible capacities of 1102.3 mAh g −1 at 0.2 A g −1 after 100 cycles and 640.6 mAh g −1 at 1.0 A g −1 after 500 cycles. Ex-situ XRD analysis and theoretical calculations are utilized to elucidate the electrochemical reaction mechanisms and the benefits of the heterointerface in enhancing performance. The density functional theory calculation results indicate that the heterointerface in Cu 2-x Se/Bi 2 Se 3 reduces diffusion energy barrier of surface Li + ions and enhances electronic conductivity. The unique structure and composition advantages also grant the optimal composite superior sodium storage performance with high specific capacity (442.7 mAh g −1 at 0.2 A g −1 after 100 cycles), exceptional rate capability (297.3 mAh g −1 at 10.0 A g −1 ), and long-term cyclability (254.7 mAh g −1 at 5.0 A g −1 after 500 cycles).
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Zhenfang Xiao,Bao Cui,Wenyi Huang,Guoqiang Zhang,Dongdong Li,Hao Cheng,Jun Feng,Lijun Li
A fluorescent probe comprising amino-modified zinc oxide quantum dots (NH 2 –ZQDs) with stable fluorescent properties was prepared using the sol–gel method. Based on the photoinduced electron transfer (PET) and electrostatic adsorption (ESA) quenching effects of copper ions (Cu 2+ ) on the NH 2 –ZQDs and the mechanism of competitive binding of Cu 2+ and the NH 2 –ZQDs to L-methionine (L-Met), an NH 2 –ZQDs + Cu 2+ + L-Met fluorescence quenching–recovery sensing system was designed to efficiently exclude Fe 3+ interference. Thus, a novel “on-off-on” fluorescent probe was developed to specifically recognize Cu 2+ . The probe showed good linearity (y = 0.03102x − 0.1156, R 2 = 0.9953) over 5–25 μmol/L, with a limit of detection of 0.039 μmol/L. It exhibited good selectivity and was successfully applied to the quantitative determination of Cu 2+ in snail meat and tap water, with spiked recoveries in the range of 98.04 %–109.53 %.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2026
·Vol. 24
·期 1
·150
·
IF 12.6
Li Bei,Chen Zhengqiang,Sun Yong,Gou Maling,Luo Yuting,Zhang Wenli,Ye Xiwen,Zhao Yaqin,Feng Lei,You Zhen
The deep-seated locations and hypoxic microenvironments of tumors critically hinder conventional phototherapies. To overcome these limitations, we engineered a novel Au@Cu 2 − x Se nanoprobe via precise aspect ratio control of gold nanorods for NIR-II plasmonic resonance and site-specific growth of Cu 2 − x Se domains, resulting in the formation of a unique “lollipop” nanostructure. This design enables single-wavelength NIR-II laser-activated photothermal therapy and dynamic dual-modal therapy with intrinsic hypoxia tolerance: the nanoprobes achieve exceptional photothermal stability while simultaneously driving photothermally enhanced chemodynamic activity through accelerated Fenton-like catalytic cycles. Crucially, this strategy not only eradicates deep tumors but also activates systemic antitumor immunity. Combined with real-time photoacoustic imaging guidance, the platform establishes an oxygen-independent paradigm for treating hypoxic solid tumors. Graphical
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JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Jing Ying Yang,Wen Ying Gao,Jian Hua Wang,Zhen Ming Dong,Yu Wang,Shao Min Shuang
Herein we present a new colorimetric and fluorescent probe , AH, derived from the Schiff base condensation between 4-(2-aminophenylimino)-7-nitrobenzofurazan and 2-hydroxy-1-naphthaldehyde for optical sensing of Cu 2+ ions. In aqueous CH 3 CN solution (CH 3 CN/H 2 O, 1:1, v/v , pH7.4), AH effectively complexed with Cu 2+ at a stoichiometric ratio of 1:1, producing nearly 25-fold fluorescence enhancement at 540 nm along with a significant color change from orange to grey blue. The sensing system exhibits high specificity for the detection of Cu 2+ . The detection limit is as low as 42.2 nM. The observed switching on fluorescence emission can be attributed to the suppression of photo-induced electron transfer (PET) as well as chelation enhanced fluorescence (CHEF) effect after coordination of AH with Cu 2+ ion via the unshared electron pair on the phenyl amine. A test strip with AH has been fabricated for identifying Cu 2+ . Fluorescence imaging study reveals that probe AH is capable to sense Cu 2+ in living HeLa cells, Malpighian tubules of locust and zebrafish.
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APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Hao Wang,Hongyou Yin,Zeng Zhang,Yan Wu,Chang Yi,Tingting Shen
γ-Cu 2 (OH) 3 Cl is used as a Fenton catalyst to mineralize phenol in high chloride solutions. The mineralization of phenol can be enhanced even at 15000 mg∙L –1 NaCl under ambient pH. In addition, other aromatic contaminants including bisphenol A , benzoic acid , 2-chlorophenol, salicylic acid and aniline can also be effectively mineralized under the high chloride concentration. However, reference catalysts including CuSO 4 , CuO and Cu 2 O are significantly depressed by chloride. The chloride resistance ability of γ-Cu 2 (OH) 3 Cl is proposed. First, σ-Cu-ligand complexes formed between Cu 2+ and phenolic hydroxyl can react with H 2 O 2 to promote the rapid reduction of Cu 2+ to Cu + , which are not hindered by chloride. Second, the self-redox property of γ-Cu 2 (OH) 3 Cl which initiates the electron transfer from H 2 O 2 to Cu 2+ to generate Cu + is improved by chloride. Third, the circumneutral pH could suppress HO• scavenging by chloride. The activation energies of phenol mineralization over γ-Cu 2 (OH) 3 Cl in chloride-free and high chloride solutions are 42.9 and 32.3 kJ∙mol –1 , respectively. Chloride does not change the phenol mineralization pathway but accelerates its degradation into small carboxylic acids.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Yisheng Lin,Yuanjin Zhan,Fang Luo,Cuiying Lin,Jian Wang,Bin Qiu,Zhenyu Lin
Hydrogen sulfide (H 2 S) has emerged as an important indicator in the spoilage process of meat. In this study, a mimetic enzyme based on Cu 2+ -modified boron nitride nanosheets-supported gold nanoparticles (AuNPs/Cu 2+ -BNNS) was synthesized, which can be used to catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB). The H 2 S gas can inhibit the activity of AuNPs/Cu 2+ -BNNS toward catalytic oxidation of TMB. Meanwhile, the usage of headspace method could avoid most interferences in the rotten sample. Various concentrations of TMB + could change the aspect ratio of the gold nanoroads (AuNRs), which results in vivid color changing and UV–vis spectra shifting. The sensor had a good linear relationship with H 2 S concentration ranging from 10.0 to 90.0 μmol/L, and the detection limit is 7.8 μmol/L. The AuNPs/Cu 2+ -BNNS sensors were successfully applied to detect H 2 S produced by meat spoilage with satisfying results.
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