BULLETIN OF THE KOREAN CHEMICAL SOCIETY
·
2015
·Vol. 36
·期 2
·618-622
·
IF 0.797
Yong Hong Zhou,Zhe Yu Wang
Under hydrothermal condition, the reaction of 2,4-dichlorophenoxyacetic acid (2,4-DH) and 1,3-bis(4-pyridyl)propane with MnCl 2 ·2H 2 O gave a novel metal-organic framework (MOF), [Mn(2,4-D) 2 (H 2 O) 2 ] n ( 1 ). This complex was characterized by IR, elemental analysis, powder X-ray diffraction, and thermogravimetry analysis. X-Ray single-crystal diffraction shows that the Mn(II) ions are bidendate bridged by carboxyl groups in the syn–anti mode, giving a two-dimensional (2D) network. Temperature-dependent magnetic studies reveal that there are weak antiferromagnetic exchange interactions between the Mn(II) ions transmitted by carboxyl groups.
研究领域:
材料科学
·
配位化学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2016
·
IF 1.78
Zhi-Jian Chen,Ya-Na Chen,Chun-Na Xu,Shan-Shan Zhao,Qi-Yue Cao,Shao-Song Qian,Jie Qin,Hai-Liang Zhu
Three novel mononuclear complexes, [M Ⅱ ( L ) 2 ·2H 2 O], (M = Cu, Ni or Cd; HL = 4-(3,4-dichlorophenyl)piperazine-1-carboxylic acid)were synthesized and structurally determined by single-crystal X-ray diffraction. Molecular docking study preliminarily revealed that complex 1 had potential urease inhibitory activity. In accordance with the result of calculation, in vitro tests of the inhibitory activities of complexes 1–3 against jack bean urease showed complex 1 (IC 50 = 8.17 ± 0.91 μ M) had better inhibitory activities than the positive reference acetohydroxamic acid (AHA) (IC 50 = 26.99 ± 1.43 μ M), while complexes 2 and 3 showed no inhibitory activities., kinetics study was carried out to explore the mechanism of the inhibiting of the enzyme , and the result indicated that complex 1 was a competitive inhibitor of urease. Albumin binding experiment and in vitro toxicity evaluation of complex 1 were implemented to explore its Pharmacological properties .
研究领域:
生物无机化学
·
药物化学
·
酶学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 18
·
IF 1.768
Hongchuan Wu,Zhiguo Li,Libin Zhu,Jiyou Gu
Aqueous polyurethane micelles from 2,4,6-trichlorphenol blocking terminal-isocynate pre-polymer were prepared which could be de-blocked at low temperature. The prepared aqueous blocked polyurethane micelles (BPUMs) were uniform and spherical micro-particles. The particle size was decreased with increase of the DMPA content, while it was enlarged at first and then gradually decreased by increasing R -value. The stability of the micelles was affected by the R value, blocked efficiency and DMPA content. HDI-BPUMs were more stable than HDI-BPUMs at the same condition. The stability was further researched by the zeta potential combining with technique and viscosity tracking method, and the initial zeta potential be used as the stability criterion. In addition, a stabilization mechanism of the micelles was proposed. TCP-blocked TDI-BPUMs could be initially de-blocked at about 75°C and TCP-blocked HDI-BPUMs was de-blocked at about 80°C. The de-blocking temperature could be further reduced in the presence of catalyst, but it was scarcely affected by the change of R -value and DMPA content. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41908
研究领域:
高分子化学
·
胶体与界面科学
·
材料化学
·
功能材料
·
纳米材料
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DOI
高影响因子
JOURNAL OF ENVIRONMENTAL ENGINEERING
·
2013
·Vol. 139
·期 9
·1222-1227
·
IF 1.399
Fangming Hu,Huihui Zhou,Zanfang Jin,Qin Sun,Zhiyan Pan,Jesse Zhu
This study investigated the biodegradation of synthetic wastewater containing 2,4,6-trichlorophenol (TCP) in a sequencing batch-fluidized bed bioreactor (SBFBBR) with waste coke particles (WCPs) as the biofilm carrier. The irregular surfaces of WCPs (diameter range from 0.6 to 2.3 mm) rendered them ideal biomass carriers. The attached biomass was 4.0–4.5 mg volatile suspended solids (VSS)/g WCPs 3 weeks after reactor start-up, and the biofilm thicknesses were 35–110 μm. Biodegradation, not adsorption-degradation or volatilization-degradation, was found to be the main TCP removal mechanism. At the initial chemical oxygen demand (COD) concentration of 300 mg L−1, removal of COD was more efficient and faster than that of TCP. The air-water ratio (ranging from 0.280 to 0.58 min−1) exerted negligible effects at dissolved oxygen (DO) concentrations above 2 mg L−1. Maximum TCP degradation (62.1% after 3 h retention time and 75.8% after 6 h) occurred at initial COD concentration of 45 mg L−1. TCP can be removed by biofilm as a sole source of carbon and energy. Furthermore, the TCP biodegradation follows zero-order reaction kinetics, with the zero-order specific biodegradation rate dependent on initial COD concentration.
研究领域:
环境工程
·
环境微生物学
·
水污染控制
·
生物反应器技术
·
有机污染物降解
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 22
·13319-13326
·
IF 3.269
Xiuling Xu,Fan Hu,Qi Shuai
Two novel Ba(II) complexes [Ba(TCPA)2(H2O)4] 1 and [Ba(H2O)8]·2(o-FcCOC6H4COO)·6H2O 2 [HTCPA = 2,4,6-trichlorophenoxyacetic acid and o-HOOCC6H4-COFc = o-ferrocenylcarbonyl benzoic acid] have been synthesized by a facile microwave method. The solid-state structures were well established by means of X-ray crystallography as well as routine analysis of the infrared spectrum (FTIR), elemental analysis, field emission scanning electron microscopy (FESEM) and thermogravimetric analysis (TG). Different polyhedra of tricapped triangular prisms for 1 and dodecahedra for 2 were present. It is worth noting that the central Ba(II) ion in 1 is nine-coordinated by two carboxylate oxygen atoms from TCPA ligands and seven oxygen atoms from coordinated water molecules. By contrast, the eight-coordinated Ba(II) in 2 forms barium-water clusters assembled by O–H⋯O hydrogen-bonds contributed by coordinated water molecules. The uncoordinated o-OOCC6H4-COFc ligands in 2 play a key role in the process of charge balance. FESEM images exhibited different surface appearances between the ligand and barium complexes, that is: flower-like HTCPA, branch-like o-HOOCC6H4-COFc, block-like complex 1 and corner-truncated cubes for complex 2. The allelopathic activity of the complexes and their corresponding ligands was evaluated against two herbaceous plants of barnyard grass and turnip (Raphanus sativus). All the tested compounds showed certain activity with good RI values. An antifungal bioassay was also carried out in vitro on three strains of Botrytis cinerea Pers., Glomerella cingulata Schr and Cytospora sp. Complex 1 and HTCPA can work against all three tested fungi, whereas o-HOOCC6H4-COFc and 2 only worked for Botrytis cinerea Pers. The complex presented in this paper has potential applications in weed control, and this work provides an experimental basis for future studies on Ba-based pesticides.
研究领域:
无机化学
·
金属配合物化学
·
农业化学
·
晶体工程
·
植物生理学
·
农药学
·
生物活性评估
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DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2015
·Vol. 17
·期 40
·26690-26702
·
IF 4.493
Shengjie Xia,Mengmeng Shao,Xiaobo Zhou,Guoxiang Pan,Zheming Ni
A series of novel organic–inorganic nanoscale layered materials were synthesized by intercalating the Ti-containing Schiff base complex into the interlayer of the ZnM layered double hydroxides (LDHs, M = Al, Cr, Fe, Ce). The hybrid material was further calcined to make metal oxide composites with highly dispersed Ti elements (Ti/ZnO–MxOy). The structural characterization and photocatalytic results showed that, after intercalation and calcination, the metal oxide composites with a unique flower-like crystal morphology not only had high specific surface area, uniform pore size distribution and narrow band gap, but also showed extremely high photocatalytic performance for hexachlorobenzene (HCB) degradation. The Ti/ZnO–Cr2O3 composite with the narrowest band gap (2.40 eV) and the highest surface area (227 m2) showed the highest photocatalytic performance for HCB (95.5% within 240 min) among the four metal oxide composites. Particularly, it was found that composites derived from layered materials with different supramolecular structure of the host and guest showed different photocatalytic properties. In addition, based on the results from ESR, GC-MS and HPLC-MS, the type and amount of hydroxyl radicals, the decomposition intermediates and the pathway of HCB degradation photocatalyzed by Ti/ZnO–MxOy composites are also discussed in detail.
研究领域:
材料化学
·
环境科学
·
纳米科技
·
光催化
·
无机化学
·
表面科学
·
污染物降解
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2016
·Vol. 23
·期 10
·10050-10057
·
IF 2.76
Xiao Hanshuang,Lv Baoying,Gao Junxia,Zhao Guohua
A hydrothermal electrocatalytic oxidation (HTECO) method is adopted to treat the biorefractory and toxic 2,4-dichlorophenoxyacetic acid (2,4-D) herbicides wastewater on nano-Pt/Ti electrode in the existence of H 2 O 2 . Comparisons for the removal of 2,4-D and total organic carbon (TOC) have been carried out between HTECO with individual electrochemical oxidation (EO) and hydrothermal catalytic oxidation (HTCO), showing that high mineralization efficiency was obtained in HTECO process. The possible factors resulting in the high removal efficiency in HTECO process have been studied by investigating the properties of the electrode and solution in hydrothermal condition, the amount of active radicals, the decay kinetic, and evolution of main intermediates of 2,4-D. Thus, an enhanced mechanism for HTECO method for the treatment of herbicides wastewater has been obtained.
研究领域:
环境工程
·
电化学工程
·
水污染控制
·
高级氧化技术
·
环境催化
·
污染物降解动力学
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2021
·Vol. 84
·期 12
·3871-3890
·
IF 1.915
Liu Chenyu,Wei Haitong,Gao Yanhui,Wang Ning,Yuan Xiaoying,Chi Zhilong,Zhao Guangli,Song Shuguang,Song Jianjun,Jin Xinghui
Metal-organic frameworks (MOFs) have unique properties and stable structures, which have been widely used as templates/precursors to prepare well developed pore structure and high specific surface area materials. In this article, an innovative and facile method of crystal reorganization was designed by using MOFs as sacrificial templates to prepare a layered double hydroxide (LDH) nano-layer sheet structure through a pseudomorphic conversion process under alkaline conditions. The obtained CoMn-LDH and CoFe-LDH catalysts broke the ligand of MOFs and reorganized the structure on the basis of retaining a high specific surface area and a large number of pores, which had higher specific surface area and well developed pore structure compared with LDH catalysts prepared by traditional methods, and thus provide more active sites to activate peroxymonosulfate (PMS). Due to the unique framework structure of MOFs, the MOF-derived CoMn-LDH and CoFe-LDH catalysts could provide more active sites to activate PMS, and achieve a 2,4-dichlorophenol degradation of 99.3% and 99.2% within 20 minutes, respectively. In addition the two LDH catalysts displayed excellent degradation performance for bisphenol A, ciprofloxacin and 2,4-dichlorophenoxyacetic acid (2,4-D). X-ray photoelectron spectroscopy indicated that the valence state transformation of metal elements participated in PMS activation. Electron paramagnetic resonance manifested that sulfate radical ( ) and singlet oxygen ( 1 O 2 ) were the main species for degrading pollutants. In addition, after the three-cycle experiment, the CoMn-LDH and CoFe-LDH catalysts also showed long-term stability with a slight activity decrease in the third cycle. The phytotoxicity assessment determined by the germination of mung beans proved that PMS activation by MOF-derived LDH catalysts can basically eliminate the phytotoxicity of a 2,4-D solution. This research not only developed high-activity LDH catalysts for PMS activation, but also expanded the environmental applications of MOF derivants. LDH derived from MOFs through a pseudomorphic conversion process. LDH showed excellent activity to activate PMS to degrade 2,4-DCP and other pollutants. CoMn-LDH and CoFe-LDH exhibited high stability and reusability. High specific surface area and well developed pore structure of LDH provide more active sites. Phytotoxicity assessment displayed the practical application value of LDH.
研究领域:
环境化学
·
材料科学
·
催化化学
·
环境污染治理
·
纳米材料
·
自由基反应机制
·
可持续环境技术
✓ 已验证
DOI
高影响因子
Stress Biology
·
2023
·Vol. 3
·期 1
·1-17
·
IF 0
Duan Kaili,Shen Qifang,Wang Yu,Xiang Ping,Shi Yutong,Yang Chenfei,Jiang Cong,Wang Guanghui,Xu Jin-Rong,Zhang Xue
Plant hormones are important for regulating growth, development, and plant-pathogen interactions. Some of them are inhibitory to growth of fungal pathogens but the underlying mechanism is not clear. In this study, we found that hyphal growth of Fusarium graminearum was significantly reduced by high concentrations of IAA and its metabolically stable analogue 2,4-dichlorophenoxyacetic acid (2,4-D). Besides inhibitory effects on growth rate, treatments with 2,4-D also caused significant reduction in conidiation, conidium germination, and germ tube growth. Treatments with 2,4-D had no obvious effect on sexual reproduction but significantly reduced TRI gene expression, toxisome formation, and DON production. More importantly, treatments with 2,4-D were inhibitory to infection structure formation and pathogenesis at concentrations higher than 100 µM. The presence of 1000 µM 2,4-D almost completely inhibited plant infection and invasive growth. In F. graminearum , 2,4-D induced ROS accumulation and FgHog1 activation but reduced the phosphorylation level of Gpmk1 MAP kinase. Metabolomics analysis showed that the accumulation of a number of metabolites such as glycerol and arabitol was increased by 2,4-D treatment in the wild type but not in the Fghog1 mutant. Transformants expressing the dominant active FgPBS2 S451D T455D allele were less sensitive to 2,4-D and had elevated levels of intracellular glycerol and arabitol induced by 2,4-D in PH-1. Taken together, our results showed that treatments with 2,4-D interfere with two important MAP kinase pathways and are inhibitory to hyphal growth, DON biosynthesis, and plant infection in F. graminearum .
研究领域:
植物病理学
·
分子生物学
·
植物激素
✓ 已验证
DOI
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Meng He,Xiaohui Lu,Yanyan Li,Yanfang Tao,Li Zhao,Yang Li
Perovskite solar cells (PSCs) suffer from a high density of defects at the buried bottom interface, which negatively impacts the efficiency in the PSCs and interface recombination. This is primarily due to carrier recombination losses occurring at the perovskite/SnO 2 . In this study, a two-dimensional lamellar V 2 CT x MXene materials, synthesized by hydrofluoric acid (HF) etching, was incorporated at the buried interface between the SnO 2 electron transport layer and the perovskite layer. The introduction of a V 2 CT x MXene modified layer at the perovskite/SnO 2 buried interface simultaneously modulates the crystallization and defect passivation within the perovskite material, leading to enhanced grain size and crystallinity. Consequently, highly efficient and stable PSCs were achieved. The presence of terminal group T x (OH − , F − ) in V 2 CT x facilitates the transfer of electrons to the 6p vacant orbitals of Pb 2+ ions, promoting the formation of Pb-F complexes. These complexes effectively suppress uncoordinated Pb ions at the perovskite interfaces, thereby significantly reducing defect density. As a result, the V 2 CT x -modified PSCs achieve an average power conversion efficiency (PCE) of 14.6 %, a notable improvement over the 12.8 % of the control devices, while also enhancing operational stability. This research provides a convenient and effective approach for enhancing crystallization and passivation defects in perovskite films, thereby improving device efficiency and stability.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 47
·40842-40849
·
IF 9.5
Yumeng Hu,Yulin Yao,Zhenheng Diao,De Sun,Yuanyuan Dong
The catalytic performance of TS-1 zeolites in selective oxidation reactions is strongly influenced by both the TiO6 concentration and specific surface area. However, simultaneously optimizing these two critical factors remains a significant challenge. Herein, a biuret-assisted hydrothermal synthesis strategy was developed to fabricate hierarchical TS-1 zeolites with high TiO6 concentration and enhanced specific surface area. The interaction between the amide groups of biuret and Ti monomers promoted the formation of TiO6 during crystallization, while the confinement effect of biuret facilitated the construction of mesopores. The resulting hierarchical TS-1 exhibited good catalytic activity and stability towards 1-hexene epoxidation and oxidative desulfurization reactions, where the conversion was 1.41 and 3.36 times higher than that of conventional TS-1, respectively. This work provides a facile approach for designing high-performance TS-1 catalysts by dual regulation of active sites and porosity.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·Vol. 36
·期 60
·e76784
·
IF 19.9
Xinyue Chen,Fangxin Zou,Junxiao Mu,Chen Zhuo,Yankai Bo,Zengshuo Liu,Siyuan Dong,Cheng Liu,Yousi Chen,Zhihuan Weng,Jia-Zhuang Xu,Zhong-Ming Li,Shouhai Zhang,Xigao Jian,Hailong Li
Thermo-acoustic insulation aerogels have received increasing attention in the aerospace sector. However, fabricating superstrong thermo-acoustic insulation aerogels via a green and efficient method remains a significant challenge. Herein, superstrong polyethersulfone (PES) aerogels are successfully fabricated via a novel and efficient strategy, integrating freeze casting, etching with water, and mild ambient pressure drying (APD), which involves no extra organic solvents. By tuning the PES concentration, PES aerogels with different morphologies and microstructures are tailored, enabling a tunable property spectrum to meet diverse application needs. Specifically, the 11 wt.% PES demonstrates an exceptional axial compression modulus (36.4 MPa), making it ideal for load-bearing components in aerospace systems. In contrast, the 9 wt.% PES achieves an enhanced acoustic performance (NRC = 0.41), underscoring its potential for construction application. Besides, all PES aerogels maintain low thermal conductivity (0.0397–0.0569 W/(m·K) in the axial direction) and self-extinguishing behavior. Notably, the PES aerogels are fully recyclable, which presents an opportunity to establish a sustainable circular economy. And last but not least, this fabrication strategy is universal and applicable to other engineering plastics. This work establishes a green, cost-effective and scalable pathway to fabricate superstrong thermo-acoustic insulating polymer aerogels, overcoming a key bottleneck toward their industrial adoption.
✓ 已验证
产品关联
DOI
高影响因子
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