MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Xiaoyun Qin,Qinyuan Lou,Yiying Ling,Zhihao Zheng,Xiaomei Qin,Fenghua Chen,Jianbo Zhao,Yanghai Gui,Huishi Guo,Chao Zhao,Zhen Zhang
In the process of industrial wastewater discharge, water pollution remains a pressing challenge, with heavy metal pollution being the most critical issue. Electrochemical sensors offer advantages such as rapid response time, ease of integration with microprocessors for on-site testing. This paper proposes the use of self-assembled polystyrene (PS) microspheres as electrode modification materials, leveraging their ordered assembly structure to reduce signal differences between electrodes from different batches, thereby preparing an electrochemical sensor with good repeatability for the determination of heavy metal ions (HMIs) Cu(II), Zn(II), and Pb(II). The experiment employed square wave anodic stripping voltammetry (SWASV) to collect the stripping currents. The designed sensor exhibited sensitivities of 0.905 μA/μM, 0.408 μA/μM, and 0.264 μA/μM, as well as limits of detection (LODs) of 0.13 μM, 0.25 μM, and 0.29 μM (S/N = 3) for Cu(II), Zn(II), and Pb(II), respectively. To enhance detection accuracy, peak current, full stripping current, and feature current were respectively input combined with machine learning (ML) algorithms to construct prediction models to evaluate the performance of the sensor. The results demonstrated that the constructed RF-Feature model significantly improved detection accuracy. It demonstrated excellent reliability, with R 2 values of 0.9952, 0.9973, and 0.9976, and root mean square error (RMSE) values of 0.6580 μM, 0.5838 μM, and 0.8164 μM, for Cu(II), Zn(II), and Pb(II), respectively. The detection range was 1 μM to 70 μM. Furthermore, the effectiveness of the sensor in practical applications was validated by detection in real wastewater samples from industrial and hospital emissions. These results were validated using an inductively coupled plasma mass spectrometry (ICP-MS) method.
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高影响因子
CRYSTENGCOMM
·
2017
·Vol. 19
·期 36
·5442-5459
·
IF 3.474
Yan-Fang Feng,Qi Tang,Kai-Liang Luo,Ji-Qing Wu,Zhong Zhang,Yu-Ning Liang,Fu-Pei Liang
A systematic investigation on the assembly of a flexible zwitterionic ligand, 1,3-bis(2-carboxyethyl)benzimidazolium (HL), with various Cu(II) salts under different conditions afforded nine coordination compounds: [Cu2L2(NO3)2]·CH3CN (1), [Cu2L2(H2O)2](NO3)2·5H2O (2), {[CuL(H2O)](NO3)}n (3), [Cu4L4(OH)2(H2O)2](NO3)2·10H2O (4), [Cu2L2(H2O)2](ClO4)2 (5), [CuL(H2O)3]2SO4·7H2O (6), [Cu(HL)2Cl2] (7), [Cu2L2Cl2]·2H2O (8) and {[Cu2L2Cl2]·2H2O}n (9). Compounds 1 and 8 are neutral paddle-wheel shaped dinuclear clusters with either nitrate or chloride as the axial ligand, while 2 and 5 are composed of identical [Cu2L2(H2O)2]2+ cationic units displaying a paddle-wheel motif with an axially coordinated aqua ligand but different counter anions. Compound 3 exhibits a 1D linear structure, where two adjacent Cu(II) centers are triply bridged via two carboxylate groups plus one aqua ligand. Compound 4 is a tetranuclear cluster supported by two μ3-bridged OH− groups and four carboxylate bridges. Compounds 6 and 9 are mononuclear species constructed from the dicarboxylate ligand in two different coordination modes. Compound 9 assumes a 1D looped chain topology with paddle-wheel cluster nodes propagated by pairs of flexible linkers. A close examination revealed that the conformational freedom of the flexible dicarboxylate ligand as well as the labile binding modes of its two side arm carboxylates is sensitive to the reaction conditions, thus resulted in the different structural types of these coordination compounds. The solvent-induced reversible single crystal-to-single crystal (SCSC) transformation between 1 and 3 could be easily achieved via the shuttle movement of NO3− outward and inward of the Cu(II) coordination sphere accompanied by a visible color change. Upon dissolution–recrystallization, the irreversible or reversible structural transformations among 2, 3, 4 and 6 could be driven by subtly controlling some factors such as solvent, pH, temperature and counter anion. The magnetic measurements for compounds 2–4 demonstrated that their magnetic behaviors are governed by antiferromagnetic interactions despite the fact that dissimilar exchange coupling pathways between neighboring Cu(II) ions are available in these three compounds.
研究领域:
配位化学
·
材料科学
·
晶体工程
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·122126
·
IF 7.5
Xiaojie Zhang,Keyi Liu,Zihan Zhang,Hong Peng,Yuefa Gong
Efficient and simultaneous removal of chromium(VI) oxyanions and heavy metal cations from complex electroplating rinse wastewater remains a major challenge. In this study, polyethyleneimine-chitosan/imidazolium-polysulfone composite beads (denoted as CSPF) were fabricated by integrating polyethyleneimine-modified chitosan powder (CSPI) with imidazolium-functionalized polysulfone (IMPSF) via a phase inversion method. The resulting CSPF beads was applied to simultaneously remove Cr(VI) and Cu(II) from simulated electroplating rinse wastewater. In a single-metal system at pH 5, CSPF exhibited maximum adsorption capacities of 89.3 mg g −1 for Cu(II) and 251.4 mg g −1 for Cr(VI). In the Cr(VI)/Cu(II) binary system, a notable co-removal synergy was observed, with adsorption capacities of CSPF increasing by 193.3% for Cu(II) and 39.7% for Cr(VI) compared to the single-metal system. The presence of other coexisting inorganic anions further significantly enhanced the adsorption of Cu(II) by CSPF. The promotion effect of different anions on Cu(II) adsorption follow the order of HCrO 4 − > H 2 PO 4 − ≈ SO 4 2 − >> NO 3 − ≈ Cl − . This trend is consistent with the extent to which they elevate the final solution pH and Cu 2p 3/2 binding energy after adsorption, and is further confirmed by DFT calculations. These results indicate that a unique electrostatic shielding–proton transfer synergistic mechanism is the key factor responsible for the synergistic co-removal of Cu(II) and Cr(VI) from complexed wastewater. Column cycling experiments demonstrated that CSPF could continuously and efficiently remove both Cu(II) and Cr(VI) from the simulated electroplating rinse wastewater, along with good reusability.
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高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2013
·
IF 1.801
Zhong-Ming Yang,Hui Zhu,Juan Sun,Shao-Song Qian,Meng-Na Cai,Hai-Liang Zhu
Five new Cu(II), Zn(II), and Ni(II) 3-(4-nitrophenyl)acrylic acid complexes were synthesized and evaluated for inhibitory activity on jack bean urease. All five complexes were structurally determined by single crystal X-ray analysis. Compared with the positive reference acetohydroxamic acid (IC50 = 13.25 μM), Cu(II) complexes 3 and 4 showed the strongest inhibitory activity against jack bean urease (IC50 = 1.23 and 1.17 μM). Ni(II) and Zn(II) complexes also exhibited inhibitory activities (IC50 = 10.09–13.10 μM).
研究领域:
无机化学
·
药物化学
·
生物无机化学
·
酶抑制
·
晶体学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Zhihui Cheng,Xingshi Li,Shuo Jiao,Dongyuan Miao,Xiaojie Yu,Hua Ni,Yuyue Geng,Ming Wang,Yaoguo Huang,Yali Zhang
A novel 3-lauramide propyl ester-4-amino-1,2,4-triazole-5-thione modified polyacrylic acid resin (LmPATT-reD113), comprising a bi-ligand amide-based triazole-thione moiety and a carboxylic acid moiety, was prepared and employed for the effective removal of Cu(II) from wastewater. The adsorption experiments demonstrated that the maximum adsorption capacity of LmPATT-reD113 for Cu (II) was 191.94 mg/g, which was 3.03 times higher than that of the polyacrylic acid resin (D113). LmPATT-reD113 and D113 had penetration times of 200 and 150 min, and equilibrium times of 1000 and 675 min, respectively. Column adsorption results showed LmPATT-reD113 outperformed D113. After four adsorption–desorption cycles, LmPATT-reD113 maintained superior performance with a desorption efficiency of 93.23 %. The adsorption kinetics and thermodynamics showed that LmPATT-reD113 to Cu(II) followed the pseudo-second-order kinetic and Langmuir isotherm models, with Δ H , Δ S , and Δ G values of 24.836 kJ/mol, 102.187 J/(mol·K) and −3.092kJ/mol at 298.15 K, respectively. Moreover, the adsorption mechanism was investigated using X-ray photoelectron spectroscopy (XPS) and density-functional theory (DFT), the results showed that the affinity of LmPATT-reD113 for Cu(II) mainly originated from the formation of five-membered rings by C=S and C–N complexed with Cu(II) and the formation of porous structure by O=C–NH molecules through intermolecular hydrogen bonding to promote the adsorption of copper.
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高影响因子
Arabian Journal of Chemistry
·
2023
·
IF 6
Min Hou,Hou Cong Li,Ning An,Wen Ge Li,Jing Tong
Three metal complexes [Cu(HL)Cl](C 2 H 5 OH) 2 ] (complex 1), [Ni 4 L 2 (CH 3 COO) 4 (C 2 H 5 OH) 4 ] (complex 2) and [CoHL 2 ] (complex 3) based on 2,3-dihydroxybenzaldehyde-2-(2-aminophenyl)benzimidazole Schiff base (H 2 L) were synthesized by solvothermal reaction. The three complexes were characterized by FT-IR spectrometer, elemental analysis, thermogravimetric analysis, and X-ray single-crystal diffraction. X-ray single-crystal diffraction analysis confirmed that complex 1 belongs to monoclinic crystal system with P 2 1 /c space group, and complex 3 crystallizes in trigonal crystal system with R-3 space group. However, complex 2 crystallized in triclinic crystal system with P-1 space group and exhibits centrosymmetric tetranuclear crystallographic structure. Besides, MTT assay was studied antitumor activities against different tumor cells. The results show that the three complexes all have fine anticancer activities. Among them, complex 2 has significantly better anticancer properties against CNE-2Z cells than that of cisplatin. Finally, apoptosis and cell migration were studied to prove that complex 2 could inhibit tumor cells from proliferating in the manner of apoptosis and migration.
研究领域:
无机化学
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材料科学
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生物化学
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药理学
·
癌症研究
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高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Jing Wang,Ru-yi Zhou,Jun-xia Yu,Hui-sheng Wang,Qiu-yan Guo,Ke-qi Liu,Hao-dong Chen,Ru-An Chi
Hydrometallurgy leaching is a common method used to recycle heavy metals from electroplating sludge , but the subsequent separation of heavy metals from the complex leaching solution is difficult. In this study, Cu(II), Zn(II), and Cr(III) were sequentially recycled from electroplating sludge by an on-line biosorption method with dosage controlling. The results showed that the three metals mainly existed in their labile forms and could be leached by HNO 3 . A series of amine-modified bagasse biosorbents were prepared, and diethylenetriamine-modified sorbent was chosen and fixed in a column to remove heavy metals from the leaching solution. Sorbent dosage experiments showed Cu(II) was recycled exclusively at a dosage of 1.5 g/L, while Zn(II) and Cr(III) were recycled simultaneously at a dosage of 3.8 g/L when treating 800 mL of a leaching agent containing 13.4, 9.9, and 7.1 mg/L of Cu, Zn, and Cr. A linear relationship between the dosage and amount of adsorbed metal ions was obtained. The XPS results illustrated that the column had an adsorption affinity order of Cu(II)>Zn(II), Cr(III)≫Ca(II), Mg(II). Cu(II) was enriched in the foot layer, and Zn(II) and Cr(III) were enriched in the middle layer of the column, while co-ions could not be absorbed. According to these results, Cu(II), Zn(II), and Cr(III) could be sequentially recycled by using these columns in-series.
研究领域:
环境科学
·
冶金工程
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Khouloud Talbi,Lamia Mammeri,Bouchra Lekikot,Mohamed El Hadi Benssassi,Tahar Sehili
Fenton process is among the most effective advanced oxidation process in wastewater treatment , but the necessity to work at acidic pH, in order to avoid metal precipitation, limits its large-scale application. In this work, a new Fenton-like process using copper(II)-nitrilotriacetic acid (Cu II -NTA) complex as catalyst, was used for the activation of hydrogen peroxide (H 2 O 2 ) to degrade sulfamethoxazole (SMX) in aqueous medium under neutral pH conditions. The results showed that the Cu II -NTA/H 2 O 2 process was not efficient in the degradation of SMX. The reason being that the generation of HO radicals is still limited by the extremely slow Cu II -NTA/Cu I -NTA redox cycle. Therefore, the combination of hydroxylamine (HA) accelerate the Cu I recovery to induce the continuous production of HO radicals by the decomposition of H 2 O 2 . It was evident that the steady-state Cu I concentration in Cu II -NTA/HA/H 2 O 2 process was much elevated than the Cu II -NTA/H 2 O 2 process due to the quick regeneration of Cu I -NTA complex by HA. Kinetic profiles were evaluated under a wide range of experimental conditions in order to assess the effects of the initial concentrations, working pH, Cu(II):NTA molar ratio and reaction temperature. The results showed that the degradation rates were enhanced with the increase of H 2 O 2 and Cu II -NTA concentration during SMX oxidation. SMX was fully (83.64 %) degraded for an initial SMX concentration of 0.01 mM and an optimal Cu(II):NTA molar ratio of 1:1. Solution pH influenced SMX degradation and the highest degradation rate constant was achieved at pH 7.2. The radical scavenging experiments indicates that hydroxyl radical (HO ) has major role for SMX degradation. The presence of metal ions such as Mg II , Ca II and Mn II had no impacts or little inhibitory effect on the Cu II -NTA complex catalyzed Fenton-like reaction, however, a complete degradation of SMX was achieved in the presence of Fe III ions. Also, the effects of various inorganic anions such as Cl − , SO 4 2− , NO 3 − and HCO 3 − on the oxidation efficiency of SMX were studied. The efficiency of mineralization of aqueous solution of SMX was evaluated by measuring total organic carbon (TOC). These results demonstrate that Cu II -NTA catalyzed Fenton-like oxidation may be an efficient approach for remediation of wastewater containing antibiotics.
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高影响因子
Journal of Materials Chemistry B
·
2021
·Vol. 9
·期 47
·9744-9753
·
IF 6.331
Kun Zhang,Xiaoni Wang,Minggang Tian,Zhiming Gou,Yujing Zuo
In recent years, it has been found that Cu2+, Fe3+, and amino acids play an irreplaceable and subtle role in organisms and have attracted the considerable attention of many researchers. Therefore, it is vital to design visual indicators to reveal the relationships between metal ions and amino acids. However, there have been few reports on this vigorous subject. Fortunately, based on the different coordination effects between metal ions and boron groups, we have designed an accessible fluorescent probe (PSI-A). Borane was introduced as an ion-sensitive group to form a novel POSS-based fluorescent probe, which achieves fascinating performance, in situ dynamic multiple detection, excellent photostability, and enervative biological toxicity. PSI-A exhibited predominant selectivity and sensitivity to Cu2+/amino acids and Fe3+/amino acids sequence reactions in HepG2 cells and zebrafish. The fluorescence of PSI-A was quenched by Cu2+, which can be recovered by adding Asp, Ser, Arg, Ace or Trp. Additionally, the fluorescence of PSI-A quenched by Fe3+ can be restored after adding Asp. PSI-A is available to monitor Cu2+/amino acids and Fe3+/amino acids sequence reactions and can be repeated for at least three consecutive cycles without a fatigued performance. Therefore, this multifunctional fluorescent probe may have prospective application potentials in the biological field.
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DOI
PubMed
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 54
·34107-34116
·
IF 3.361
Jiawei Li,Ouwen Xu,Xiashi Zhu
In this study, an on–off–on fluorescence probe for the detection of trace Cu(II) and ascorbic acid (AA) based on biomass-derived sulfur and nitrogen double heteroatom-doped carbon dots (N,S-CDs) was designed. For the first time, the probe (N,S-CDs) was prepared from grape seeds and thiourea as the precursor. Cu(II) was added to the carbon point solution, the fluorescence intensity (FL) of N,S-CDs was strongly quenched (switch OFF) and the fluorescence probe turned to “ON” (switch ON) with the addition of AA. Under the optimal conditions, the as-synthesized N,S-CDs had a good detection performance for Cu(II) and AA assay with the linearity ranges from 150–500 μg mL−1 and 0.1–400 μg mL−1, and the LODs were 0.048 mg L−1 and 0.036 mg L−1, respectively. The as-prepared N,S-CDs exhibited a low cytotoxicity and a good biocompatibility, which show their potential for application in the biological imaging of living cells.
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Wei Zhang,Hu Wang,Chao Ding,Yizhu Lei,Chaochuang Yin,Renshu Wang,Qiming Yang,Tingting Wu,Mei Zhang
Three mononuclear Cu(II) complexes, [Cu(C 16 H 12 NO 3 F)(H 2 O)] ( C1 ), [Cu(C 16 H 12 NO 3 F)(C 10 H 9 N 3 )]·H 2 O·0.5CH 3 OH ( C2 ) and [Cu(C 16 H 12 NO 3 F)(C 3 H 4 N 2 )] ( C3 ) with a fluorinated Schiff base ligand (C 16 H 12 NO 3 F = 5-fluorosalicylaldehyde-L-phenylalanine) and different secondary ligands (C 10 H 9 N 3 = 2,2′-dipyridylamine; C 3 H 4 N 2 = imidazole) were synthesized and structurally characterized. Theoretical calculation of the three complexes was carried out by density functional theory (DFT) Becke's three-parameter hybrid (B3LYP) method using the Gaussian 09 package. The calculation results are in accordance with experimental results. In addition, the inhibitory activities of C1 - C3 were tested in vitro against jack bean urease. At the same time, molecular docking was investigated to determine the probable binding mode. The experimental values and docking simulation exhibited that C1 showed strong inhibitory activity (IC 50 = 0.68 ± 0.09 μM) compared with the positive reference acetohydroxamic acid (IC 50 = 27.73 ± 2.93 μM). Moreover, a 100-ns molecular dynamics (MD) simulation was performed to evaluate the stability of urease (PDB ID: 3LA4) and the binding stability of the 3LA4 /C1 and 3LA4/ C3 using the Desmond 2021 from Schrödinger. Their structure-inhibitory activity relationship was further discussed from the perspective of molecular docking, theoretical calculation and molecular dynamics simulation.
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2018
·
IF 1.81
Xuefang Shang,Xuejing Yue,Yanmei Chen,Congshu Li,Hongli Chen,Tianyun Wang
Four colorimetric fluorescent probes based on copper(II) complexes were synthesized and the molecular structures were characterized by X-ray diffraction, ESI-HRMS and elemental analysis . When exposed to HS − , the synthesized probes showed significant color changes from yellow to red and remarkable increase of fluorescence intensity (over 80-fold). What's more, the interaction of host-guest could be completed in 2 min. However, no clear color and fluorescence intensity changes were observed in the presence of other anions (AcO − , H 2 PO 4 − , F − , Cl − , Br − , I − , SO 4 2− , SO 3 2− , CO 3 2− , Cys and GSH). The synthesized colorimetric fluorescent probes could detect HS − rapidly and conveniently. Cytotoxicity studies indicated that the synthesized fluorescent probes were low cytotoxicity in Hela cells and may be used to detect H 2 S level in vivo.
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高影响因子
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