JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Ying Cai,Shihao Shen,Jinhong Fan
This study applied a mineral material of FeS to activate sulfite for efficient degradation of TTC in the presence of Cu(II) based on the identified complexation mechanism through UV–Vis spectra, FTIR spectroscopy and DFT calculation . pH plays an important role in TTC degradation and the initial pH of 6 and 7 were the divide in the contributions of FeS/sulfite oxidation and complex-precipitation. TTC-Cu(II) exhibits a superior promoting effect on the TTC degradation in FeS/sulfite system due to the improvement of TTC electron transfer reactivity and Fe(II) dissolution from FeS. Moreover, the formation of Cu(I) improved the recycling of Fe(II) from Fe(III). Dissolved oxygen-dependent free radicals’ generation was confirmed, and TTC degradation was mainly attributed to SO 4 ·− and ·OH. The characterization of FeS surface through XPS, XRD , SEM-EDS, Fe(II) deactivation tests, together with the comparison of pseudo-first-order rate constants for TTC degradation by FeS and ferrous ion supported the important role of surface and dissolved Fe(II) in sulfite activation . Furthermore, reasonable degradation pathways of TTC have been proposed according to the detected products by LC-MS. This work highlights the important role of pH, DO and Cu(II) complexation in sulfite activation and TTC degradation, furnishing theoretical support for further relevant studies.
研究领域:
环境科学
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化学
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DOI
PubMed
高影响因子
TRANSITION METAL CHEMISTRY
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2020
·Vol. 45
·期 7
·493-500
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IF 1.366
Yang Xinda,Gu Shunxin,Jiang Qin,Wang Yanqing,Wang Daqi,Shi Pengfei
Abstract A Cu(II) complex [Cu 2 (phen) 2 (NAB) 2 (HO)] n (phen = 1, 10-phenanthroline and NABH = p -N, N-(2-hydroxyethyl)amino benzoic acid) was synthesized, and its structure was confirmed by X-ray diffraction. The structure of the complex appeared to be clamp-like, in which Cu(II) atoms adopt distorted square pyramidal geometry. Each Cu(II) is coordinated by two nitrogen atoms in phen ligand and two carboxyl oxygen atoms from each of the two NABH ligands. The clamp-like coordination units are bridged by adjacent hydroxyethyl groups into infinite 1D chain, which are further linked by extensive O···H hydrogen bonds and π–π interactions to form 3D networks. The titled complex displayed weak double-stranded DNA interaction activity. Spectroscopic and theoretical simulation results indicated that the complex attached onto DNA surface through hydrogen bonding with base pairs. Graphic abstract A novel benzoic acid derivative with two extremity hydroxyethyl groups was designed and used as auxiliary ligand to synthesize mixed coordinating clamp-like Cu(II)-phenanthroline complex. Hydrogen bonding played crucial role in bridging the clamps into infinite 1D chain and also the DNA complex interaction mode.
研究领域:
无机化学
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生物化学
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分子生物学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Chao Yang,Xueying Zhao,Yunlong Zhao,Chenchen Ji,Ronglan Wu,Lu Wang,Xueqing Shao
CuO x -decorated TiO 2 (CuO x /TiO 2 ) nanoparticles have been prepared by the pyrolysis of Cu(II) complex on TiO 2 in an oxygen-limited atmosphere. A solution phase deposition method combined with freeze drying was employed for depositing the 2-methylimidazole-Cu(II) complex onto TiO 2 nanoparticles . The effect of decoration of CuO x on TiO 2 nanoparticles in terms of the crystal phase, morphology, chemical compositions , surface area , surface elemental states, optical absorption and emission properties, was investigated using a series of characterization tools. The oxygen-limited pyrolysis of 2-methylimidazole resulted in the reduction of partial Ti 4+ and Cu 2+ ions into Ti 3+ , Cu + and Cu 0 species, respectively. The surface decoration of CuO x was found to improve the separation and migration of photogenerated electron-hole pairs and increase the life time of excitons. Furthermore, the photocatalytic performance of CuO x /TiO 2 nanoparticles was evaluated for hydrogen evolution in aqueous methanol solution under UV–visible light irradiation . The CuO x /TiO 2 photocatalyst with the optimal cocatalyst loading achieved hydrogen evolution rate of 4.34 mmol h −1 g −1 , with 71- and 5.5-fold enhancement in activity over neat TiO 2 and CuO x /P25, respectively. It is expected that the combination of deposition and pyrolysis of 2-methylimidazole-Cu(II) complex could be an effective approach for the decoration of Cu and its oxides on other supports.
研究领域:
材料科学
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纳米技术
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光催化
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化学工程
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DOI
高影响因子
Nature Communications
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2024
·Vol. 15
·期 1
·1-11
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IF 14.7
Li Wei,Zhang Menghang,Sun Xinyi,Sheng Chuanchao,Mu Xiaowei,Wang Lei,He Ping,Zhou Haoshen
Li-CO 2 batteries offer a promising avenue for converting greenhouse gases into electricity. However, the inherent challenge of direct electrocatalytic reduction of inert CO 2 often results in the formation of Li 2 CO 3 , causing a dip in output voltage and energy efficiency. Our innovative approach involves solid redox mediators, affixed to the cathode via a Cu(II) coordination compound of benzene-1,3,5-tricarboxylic acid. This technique effectively circumvents the shuttle effect and sluggish kinetics associated with soluble redox mediators. Results show that the electrochemically reduced Cu(I) solid redox mediator efficiently captures CO 2 , facilitating Li 2 C 2 O 4 formation through a dimerization reaction involving a dimeric oxalate intermediate. The Li-CO 2 battery employing the Cu(II) solid redox mediator boasts a higher discharge voltage of 2.8 V, a lower charge potential of 3.7 V, and superior cycling performance over 400 cycles. Simultaneously, the successful development of a Li-CO 2 pouch battery propels metal-CO 2 batteries closer to practical application.
研究领域:
电化学
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材料科学
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能源存储
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DOI
PubMed
高影响因子
DALTON TRANSACTIONS
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2020
·Vol. 49
·期 34
·11851-11858
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IF 4.174
Shuhua Cao,Xuezhao Li,Yong Gao,Fahui Li,Kaoxue Li,Xuanxuan Cao,Yiwen Dai,Lirong Mao,Shanshan Wang,Xishi Tai
A bimetallic Cu(II) complex as a novel antitumor chemodynamic therapy agent with glutathione (GSH) depletion properties is successfully synthesized and well characterized. In tumor cells, the Cu2+ ions of the complex are reduced to Cu+ ions by GSH and then catalyzed by the overexpressed H2O2 to generate highly cytotoxic hydroxyl radicals (˙OH) that kill cancer cells. The complex is quickly taken up by cancer cells and distributed in multiple organelles including mitochondria and the nucleus. The complex demonstrates good cytotoxicity toward various cancer cell lines. However, its toxicity toward normal cells is significantly lower than that toward cancer cells due to the limited expression of H2O2. In addition, the complex could arrest the cell cycle of the G0/G1 phase, thereby inducing apoptosis rather than necrosis.
研究领域:
化学
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药学
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肿瘤学
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DOI
PubMed
高影响因子
CHEMBIOCHEM
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2022
·Vol. 23
·期 20
·e202200413
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IF 3.461
Lingxia Qin,Xinxin Ren,Kaiyue Hu,Di Wu,Zhiyong Guo,Sui Wang,Linwen Jiang,Yufang Hu
Graphical An electrochemical biosensor based on the supramolecular host-guest recognition between cucurbit[7]uril (CB[7]) and L -phenylalanine-Cu(II) complex is reported for pyrophosphate (PPi) and alkaline phosphatase (ALP) analysis. We report an electrochemical biosensor based on the supramolecular host-guest recognition between cucurbit[7]uril (CB[7]) and L -phenylalanine-Cu(II) complex for pyrophosphate (PPi) and alkaline phosphatase (ALP) analysis. First, L -Phe-Cu(II) complex is simply synthesized by the complexation of Cu(II) (metal node) with L -Phe (bioorganic ligand), which can be immobilized onto CB[7] modified electrode via host-guest interaction of CB[7] and L -Phe. In this process, the signal of the complex-triggered electro-catalytic reduction of H 2 O 2 can be captured. Next, due to the strong chelation between PPi and Cu(II), a biosensing system of the model “PPi and Cu(II) premixing, then adding L -Phe” was designed and the platform was applied to PPi analysis by hampering the formation of L -Phe-Cu(II) complex. Along with ALP introduction, PPi can be hydrolyzed to orthophosphate (Pi), where abundant Cu(II) ions are released to form L -Phe-Cu(II) complex, which gives rise to the catalytic reaction of complex to H 2 O 2 reduction. The quantitative analysis of H 2 O 2 , PPi and ALP activity was achieved successfully and the detection of limits are 0.067 μM, 0.42 μM and 0.09 mU/mL ( S / N =3), respectively. With its high sensitivity and selectivity, cost-effectiveness, and simplicity, our analytical system has great potential to for use in diagnosis and treatment of ALP-related diseases.
研究领域:
分析化学
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生物化学
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电化学
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分子识别
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生物传感器
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DOI
PubMed
高影响因子
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