CRYSTAL GROWTH & DESIGN
·
2016
·
IF 4.425
Kong-Qiu Hu,Liu-Zheng Zhu,Cong-Zhi Wang,Lei Mei,Yun-Hai Liu,Zeng-Qiang Gao,Zhi-Fang Chai,Wei-Qun Shi
Novel uranyl coordination polymers, UO2(bqdc)(phen)·H2O (1), [UO2(μ-OH)(bqdc)(H2bpy)0.5(H2O)] (2), Na[(UO2)2(bqdc)3Na(H2O)2] (3), and [Na(bqdc)0.5(bpp)(H2O)] (4) (H2bqdc = 2,2′-biquinoline-4,4′-dicarboxylic acid; phen = 1,10-phenanthroline; bpy = 4,4′-bipyridine; bpp = 1,3-di(4-pyridyl)propane), with bqdc2– ligands have been successfully synthesized by hydrothermal reactions and characterized by single-crystal X-ray diffraction, Infrared spectroscopy (IR), thermogravimetric analysis (TGA), and powder X-ray diffraction (PXRD). The topological structures feature 1D chain to 3D framework by altering N-donor ancillary ligands. Compound 1 shows a 1D wave-shaped zigzag chain structure and further extends to a two-dimensional (2D) layer through π···π interactions between the quinoline ring of bqdc2– ligand and benzene ring of phen ligand. The uranium adopts an approximate hexagonal bipyramidal coordination geometry with the equatorial plane warped to the unusual chair conformation. Compound 2 features rectangular-shaped units with space range of 12.28(2) Å × 7.16(3) Å, exhibiting an intriguing 2D uranyl double layered motif formed by 1D ladder chains. The protonated bpy molecules provide space filling and form hydrogen bonds with the layers. Compound 3 is based upon 3D heterometallic frameworks constructed from UO22+, Na+, and bqdc2– ligands. The most striking feature of compound 3 is that one sodium ion is located in the middle of two adjacent uranyl ions, forming the trinuclear heterometal clusters (U2Na), which are further connected by bqdc2– ligands to generate UOFs with the cavity size of 10.07(0) Å × 13.86(2) Å. The local 1D structure of compound 3 is similar to the zigzag chain of compound 1. Compound 4 displays 1D chain structure and further extends to 3D framework via hydrogen bond and π···π interactions. Moreover, the electronic structural and bonding properties of the uranyl compounds 1–3 have been systematically explored by density functional theory (DFT) calculations.
研究领域:
化学
·
材料科学
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DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 3
·365
·
IF 4.329
Yi Li,Guoyong Huang,Cong Chen,Xue-Wei Wei,Xi Dong,Wei Zhao,Hai-Mu Ye
Big spherulite structure and high crystallinity are the two main drawbacks of poly(butylene succinate) (PBS) and hinder its application. In this work, a new type of copolyester poly(butylene succinate-co-butylene acetylenedicarboxylate) (PBSAD) is synthesized. With the incorporation of acetylenedicarboxylate (AD) units into PBS chains, the crystallization temperature and crystallinity are depressed by excluding AD units to the amorphous region. In contrast, the primary nucleation capability is significantly strengthened, without changing the crystal modification or crystallization kinetics, leading to the recovery of total crystallization rate of PBSAD under the same supercooling condition. The existence of specific interaction among AD units is found to be crucial. Although it is too weak to contribute to the melt memory effect at elevated temperature, the interaction continuously strengthens as the temperature falls down, and the heterogeneous aggregation of AD units keeps growing. When the aggregating process reaches a certain extent, it will induce the formation of a significant amount of crystal nuclei. The unveiled nucleation mechanism helps to design PBS copolymer with good performance.
研究领域:
材料科学
·
高分子化学
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高影响因子
Chemosensors
·
2023
·Vol. 11
·期 4
·209
·
IF 4.2
Jiazheng Wan,Guocheng Han
Lysozyme (Lyz) is found in animal and human bodily fluids, and is frequently utilized as a biomarker for various diseases. Even trace amounts of Lyz in food can potentially trigger adverse immune system reactions in sensitive individuals. Therefore, it is very important to monitor Lyz concentration in foods for safety. In this study, a simple and convenient electrochemical sensor for Lyz detection was prepared by modifying gold nanoparticles (AuNPs) and ferrocene dicarboxylic acid (Fc(COOH)2) on a glass carbon electrode (GCE), which was characterized fully by various electrochemical methods and field emission scanning electron microscope (FESEM). The proposed method utilized Fc(COOH)2as a probe and AuNPs as an electron transfer medium to improve the sensor’s current response performance. Under optimal conditions, the sensor was used to detect Lyz with a linear range from 0.10~0.70 mmol·L−1with a sensitivity of 50.55 μA·mM−1·cm−2, and a limit of detection (LOD) of 0.07 mmol·L−1. In the standard addition experiment of food samples (egg white), a total R.S.D. of less than 6.75% and an average recovery between 95.45% and 102.62% were obtained.Keywords:electrochemical sensors;ferrocene dicarboxylic;gold nanoparticles;lysozyme;amplifier unit
研究领域:
分析化学
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食品安全
·
生物传感器
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DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2020
·
IF 4.192
Miaomiao Li,Jinlong Song,Qingyun Ma,Delong Kong,Yiqing Zhou,Xu Jiang,Rebecca Parales,Zhiyong Ruan,Qinghua Zhang
A total of five strains of nicosulfuron-degrading bacteria were isolated from a continuously cultivated microbial consortium using culturomics. Among them, a novel Pseudomonas strain, LAM1902, with the highest degradation efficiency was investigated in detail. The characteristics of nicosulfuron-degradation by LAM1902 were investigated and optimized by response surface analysis. Furthermore, non-targeted metabolomic analysis of extracellular and intracellular biodegradation of nicosulfuron by LAM1902 was carried out by liquid chromatography/mass spectroscopy (LC–MS) and gas chromatography–time-of-flight/mass spectroscopy (GC–TOF/MS). It was found that nicosulfuron was degraded by LAM1902 mainly via breaking the sulfonylurea bridge, and this degradation might be attributed to oxalate accumulation. The results of GC–TOF/MS also showed that the intracellular degradation of nicosulfuron did not occur. However, nicosulfuron exerted a significant influence on the metabolism of inositol phosphate, pyrimidine, arginine/proline, glyoxylate, and dicarboxylate metabolism and streptomycin biosynthesis. The changes of myo-inositol, trehalose, and 3-aminoisobutanoic acid were proposed as a mechanism of self-protection against nicosulfuron stress.
研究领域:
微生物学
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环境科学
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植物保护
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Ziheng Bai,Qi Liu,Hongsen Zhang,Jingyuan Liu,Jing Yu,Jun Wang
The development of nuclear energy requires the consumption of large amounts of uranium resources, and the uranium in seawater is very abundant. Therefore, it is very important to collection of uranium from seawater using efficient and convenient methods. In this work, imidazole-4, 5-dicarboxylic acid (H 3 IMDC) was introduced onto the surface of hemp fibers (HF) by two-step method to prepare a novel bio-based polymeric material HF-H 3 IMDC 3 adsorbent containing imidazole nitrogen and carboxyl groups. The introduction of H 3 IMDC could improve the activity sites and hydrophilicity of the HF, which significantly increased the adsorption capacity of uranium. The results showed that the maximum adsorption capacity of HF-H 3 IMDC 3 is 469.48 mg/g at pH 7.0 and 313 K. Adsorption process was more suitable for the pseudo-second order model. Moreover, HF-H 3 IMDC 3 exhibited good selectivity and reusability. More importantly, the HF-H 3 IMDC 3 also presented excellent adsorption performance in natural seawater, indicating that HF-H 3 IMDC 3 has a great prospect for the extraction of U(VI) from seawater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Chunyan Xiong,Kang Kan,Ziyun Xie,Chengchong Wang,Xiaolei Li,Yuanlai Xu,Yafen Dai,Jiangman Sun,Jiajun Gao,Bin Shan,Jian Pu
Recovery of high-valued metals such as Li and Co from spent Li-ion batteries is quite important for sustainability reasons. The novelty of this work was based on the view of molecular design, proposing a strategy that inserts another group between two −COOH groups on an organic acid to activate them. On this basis, a novel solvent dicarboxylated polyethylene glycol (dcPEG), i.e., HOOC–CH2(CH2CH2O)nCH2–COOH, was chosen to leach Li and Co from LiCoO2. Expectedly, HOOC–CH2(CH2CH2O)nCH2–COOH (n = 250), which was denoted as dcPEG250, showed appealing leaching performance without the help of H2O2 and quaternary ammonium salt. It can simultaneously extract Co and Li, and the leaching efficiency reached as high as almost 100% under the proper conditions. The excellent performance was ascribed to structural feature of dcPEG. The presence of main chain (CH2CH2O)n extended the distance between two −COOH groups at the ends, limited their intramolecular interaction, and activated the −COOH groups. Accordingly, the active H atom on the −COOH group can react with LiCoO2, and the active O atoms on ether (C–O–C) and carbonyl (C═O) groups can coordinate with metals. In a word, this work could not only provide a promising solvent but also inspire researchers to engineer more novel solvents from the view of molecular design.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
CRYSTENGCOMM
·
2013
·Vol. 15
·期 36
·7274-7284
·
IF 3.879
Xiu-Li Wang,Fang-Fang Sui,Hong-Yan Lin,Chuang Xu,Guo-Cheng Liu,Ju-Wen Zhang,Ai-Xiang Tian
Six new transition metal coordination polymers, namely, [Co(1,2-BDC)(L)1.5(H2O)] (1), [Co(1,3-BDC)(L)(H2O)2]·H2O (2) [Co(5-AIP)(L)0.5(H2O)]·2H2O (3), [Cu(1,2-BDC)(L)] (4), [Cu(1,3-BDC)(L)(H2O)]·3H2O (5), and [Cu2(5-AIP)2(L)2(H2O)]·6H2O (6) (L = N,N′-di(3-pyridyl)octanediamide, 1,2-H2BDC = 1,2-benzenedicarboxylic acid, 1,3-H2BDC = 1,3-benzenedicarboxylic acid, 5-H2AIP = 5-aminoisophthalic acid), have been hydrothermally synthesized and structurally characterized by single crystal X-ray diffraction. In compound 1, the adjacent CoII ions are connected by L ligands to form a 1D chain with an alternating arrangement of L ligands and Co2L2 dinuclear loops. The 1,2-BDC anions coordinate with one CoII ion in a bis(monodentate) chelate mode. Complex 2 shows a 2D (44) grid network with the sql topology, which consists of the 1D zigzag [Co–L]n chain and 1D linear [Co-1,3-BDC]n chain. When 5-H2AIP is used in compound 3, an interesting 2D terraced-type layer based on 1D [Co-5-AIP]2n ladder-like chains and μ2-bridging L ligands with 3,4-connected {62.10}{6} topology is formed. Under the similar conditions to compound 1, except that the cobalt(II) salt is replaced by a copper(II) salt, a 2D wave-like network 4 with 2,4-connected {64.8.10}{6} topology is obtained. Compound 5 displays a 3D coordination polymeric architecture based on 1D [Cu-1,3-BDC]n chains and [Cu–L]n chains, which represents an intriguing 3-fold interpenetrating framework with CdSO4-type topology. When 1,3-BDC is replaced by 5-AIP, another 3-fold interpenetrating 3D CdSO4-type coordination framework for compound 6 is obtained, which is constructed from three types of 1D chains: [La–Cu–Lc]n chain, [Lb–Cu–Lb]n chain and [Cu-5-AIP]n chain. The adjacent 1D chains for 1 and 2D layers for compounds 2, 3 and 4 are further extended by hydrogen bonding interactions to 3D supramolecular frameworks. The effect of dicarboxylates and central metals on the structures of the title complexes has been discussed. Furthermore, the electrochemical behaviors and solid state fluorescent properties for compounds 1–6 are investigated.
研究领域:
化学
·
材料科学
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DOI
高影响因子
IUCrJ
·
2021
·
IF 4.769
Jiawei Lin,Peng Shi,Ying Wang,Lingyu Wang,Yiming Ma,Fei Liu,Songgu Wu,Junbo Gong
Template design on polymorph control, especially conformational polymorphs, is still in its infancy and the result of polymorph control is often accidental. A method of regulating the crystallization of conformational polymorphs based on the crystal structure similarity of templates and the target crystal form has been developed. Crystal structure similarity was considered to be able to introduce lattice matching (geometric term) with chemical interactions to regulate conformational polymorph nucleation. The method was successfully applied to induce the crystallization of DA7-II [HOOC–(CH 2 ) n −2 –COOH (diacids), named DA n , where n = 7, 9, 15, 17 and II represents the metastable polymorph] on the surface of DA15-II. An analogous two-dimensional plane – the (002) face of both DA15-II and DA7-II – was firstly predicted as the epitaxially attached face with similar lattice parameters and the strongest adsorption energy. The powder DA15-II template with the preferred orientation face in (002) presented much stronger inducing DA7-II ability than the template with other preferred orientation faces. The epitaxial growth of DA7-II on DA15-II through an identical (002) face was clearly observed and verified by the single-crystal inducing experiments. The molecular dynamics simulation results demonstrated that the strong interactions occurred between DA7 molecules and the (002) face of DA15-II. This method has been verified and further applied to the crystallization of DA7-II on the surface of DA17-II and DA9-II on the surface of DA15-II. This study developed a strategy based on structure similarity to regulate the conformational polymorph and verified the significant role of lattice matching and chemical effects on the design and preparation of templates.
研究领域:
材料科学
·
结晶学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xiangyu Li,Rongxiao Wei,Liansheng Chen,Yongkang Mo,Chengrong Qin,Chen Liang,Baojie Liu,Caoxing Huang,Shuangquan Yao
The efficient catalytic hydrolysis and mitigation of unstable structural transitions in lignin are essential for the commercialization of organic acid pretreatment. A novel binary carboxylic acid pretreatment utilizing α-ketoglutaric acid (AKA) was developed, which exploits a distinctive ion-pair biomimetic catalytic mechanism along with the activation of the ketone group. Under optimal AKA pretreatment conditions (5 % acid concentration, 150 °C, 45 min), the hemicellulose separation yield reached 85.21 %. The rapid and efficient separation of eucalyptus hemicellulose results from the low pKa value and the ion-pair biomimetic catalytic mechanism of AKA. The lignin structure exhibited greater integrity (β-O-4: 47.45 %) and a higher phenolic hydroxyl content (1.82 mmol·g −1 ) compared to conventional binary carboxylic acid pretreatments (maleic and oxalic acids). These findings indicated that the recondensation of lignin, which occurs after the cleavage of aryl-ether bonds during acidic catalysis, was inhibited by the activation of ketone groups during AKA pretreatment. This study introduces an innovative methodology for developing efficient binary carboxylic acid pretreatment procedures focused on selective hemicellulose separation, emphasizing effective catalytic hydrolysis and the maintenance of lignin reactivity.
研究领域:
生物化学
·
可再生资源与环境工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2021
·
IF 1.751
Fei-Fei Chen,Shi-He Wang,Xiao-Yun Tang,Jia-Qi Li,Yu-Xian Chi,Jing Jin
Seven coordination polymers having the general formula {[Ln2(2,6-pydc)(ox)2⋅(H2O)4]⋅3H2O}n (Ln = Sm 1, Eu 2, Gd 3, Tb 4, Dy 5, Ho 6, Er 7; 2,6-pydc2− = 2,6-pyridinedicarboxylate, ox2− = oxalate) were synthesized by the hydrothermal method. Their IR, UV-Vis-NIR absorption spectra, and Vis-NIR emission spectra were investigated, and the luminescent properties of the polymers were studied in detail. Crystal structures were determined by means of a single-crystal X-ray diffractometer, and all of them proved to have three-dimensional frameworks. Except for polymers 3 and 7, the polymers displayed the characteristic emissions of Ln(III) ions due to the effective sensitization of ligands. At the same time, the 4f orbitals of Ln(III) ions were shifted by the effects of ligand field, which influenced emission spectra and absorption spectra of some of the polymers.
研究领域:
材料化学
·
无机化学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·Vol. 14
·期 1
·120851
·
IF 7.2
Zhifeng Zhang,Junhao Fu,Jianhua Kang,Wei Sun,Haisheng Han
The core of mineral flotation resides in specific matching between collectors and mineral surfaces. Amid new energy-driven fluorite demand, efficiently separating it from similarly interfaced calcite remains challenging due to non-selective fatty acid collectors. Herein, a novel "crab"-shaped dicarboxylic collector, N-Benzyloxycarbonyl-glutamic acid (ZGA), was synthesized and its flotation performance was evaluated. Single-mineral flotation showed that at a concentration of 2 × 10 −5 mol/L and pH 9, the recovery difference between fluorite and calcite reaches 56.96 %, while the synergistic enhancement of terpineol further boosts fluorite recovery to over 90 %. Surface characterizations confirmed that ZGA undergoes selective adsorption via chemical and electrostatic interactions, which effectively modifies the surface roughness of fluorite and significantly enhances its hydrophobicity. DFT calculations demonstrated the dicarboxylic distance matches alternating Ca 2+ on fluorite (111), enabling stable adsorption with an adsorption energy of −325.256 kJ/mol. Flotation practice yielded improved metrics, with the CaF 2 concentrate grade reaching 96.45 % and recovery increasing by 2.76 %. These findings offer valuable insights for the design of collector selective to fluorite, while facilitating the efficient and clean separation of strategic calcium-containing minerals.
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高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2025
·
IF 2.1
Xiaoling Luo,Zheng Liu,Xiaoqi Lan,Pintian Zou,Xiangfei Kong,Guo-Cheng Han
We study the non-covalent interactions within complexes and characterize the structure and properties of N-heterocyclic dicarboxylic acid rare earth complexes. The chelating ligand 2,2′-bipyridine-6,6′-dicarboxylic acid (H2bpdc) was reacted with neodymium nitrate hexahydrate and dysprosium nitrate pentahydrate in a solvothermal reaction to produce {[Nd(bpdc)(HCOO)(H2O)2]·H2O}n (A) and [Dy2(bpdc)3(H2O)2(DMF)]·3H2O (B), respectively. Single crystal X-ray diffraction characterization reveals that A is a metal organic framework, with the rare earth center adopting a nine-coordinated tricapped trigonal prism. In contrast, B forms an eight-coordinate triangular dodecahedron. Fluorescence analyses indicate that both A and B have excellent luminescence properties. The thermal stabilities of both complexes were examined using thermogravimetric analysis (TG and DTG), and A has better thermal stability than B.
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高影响因子
危险品化学品经营许可证（带存储）