JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY
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2022
·Vol. 102
·期 7
·619-628
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IF 1.925
Yu Zhi-chao,Lu Yun,Shan Pei-hui,Fan Ying,Tao Zhu,Xiao Xin,Wei Gang,Prior Timothy J.,Redshaw Carl
The complexation between cucurbit[8]uril, Q[8], and isonicotinic acid has been studied using 1 H NMR spectroscopy, UV–Vis absorption spectroscopy, Raman spectroscopy and single crystal X-ray diffraction. The results revealed that the 2:1 inclusion complex (4-PA) 2 @Q[8]·25H 2 O is formed, with two guests simultaneously encapsulated in the hydrophobic cavity; the mean planes of the guests are 3.535 Å apart. Graphical abstract
研究领域:
化学
·
药物科学
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DOI
高影响因子
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
·
2019
·
IF 0.559
Yun-Xiang Wen,Wei-Feng Wen,Wen-Tong Chen,Chang-Song Liu,Li-Fa He
A new dysprosium complex [Dy(IA)2(H2O)4]nnNO3 (1; IA is isonicotinic acid anion), was synthesized. The structure was determined by single-crystal X-ray crystallography. Every two neighboring Dy3+ ions are interlinked by two μ2-bridging IA groups to form a one-dimensional (1-D) chain. The chains link to each other through the π···π interactions and yield a three-dimensional (3-D) supramolecular network. This complex displays yellow photoluminescence, which should be due to the 4F9/2 → 6H13/2 transition of the 4f electrons of the Dy3+ ions. The solid-state UV/Vis diffuse reflectance spectrum unveils that this compound has a wide optical band gap of 2.08 eV.
研究领域:
无机化学
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材料科学
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晶体学
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DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2023
·
IF 2.8
Zhiguo Shang,Zhexin Zhu,Gangqiang Wang,Wangyang Lu,Bingyao Wu,Qijian Li
In this study, each cobalt tetra-aminophthalocyanine (CoTAPc) molecule was immobilised with four isonicotinic acid (INA) molecules by amide bonding, a novel and highly efficient catalyst pyridine-bridged cobalt tetra-aminophthalocyanine (CoTAPc-TINA) was synthesised. The introduction of INA molecules promoted CoTAPc to expose more active sites, and increased the electron cloud density of cobalt ions promoting O–O bond homolysis of PMS to generate more active species, which significantly enhanced catalytic activity. With the pharmaceutical of carbamazepine (CBZ) as model pollutant, 0.1 g/L CoTAPc-TINA in dark in the presence of 0.4 mM PMS, 98.8% CBZ was removed within 10 min. However, under the same conditions the removed of CBZ was only 58.9% by CoTAPc/PMS system. Radical capture experiments combined electron paramagnetic resonance technology demonstrate that hydroxyl radicals, sulphate radicals, superoxide radicals and singlet oxygen are the main active species in the CoTAPc-TINA/PMS system. As the reaction proceeded, all aromatic intermediates were transformed to small molecular acids by these active species. This investigation provided a new insight for application of metal phthalocyanine in wastewater treatment.
研究领域:
环境科学
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催化化学
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DOI
PubMed
高影响因子
ChemCatChem
·
2018
·Vol. 11
·期 3
·1045-1056
·
IF 4.674
Gui-Ying Zhuge,Wei-De Zhang
Graphical This study reports a strategy to tune nitrogen content in carbon nitride using isonicotinic acid as an additive in the precursors. The nitrogen-rich and nitrogen-deficient g-C 3 N 4 samples display enhanced visible light absorption and improved separation of charge carriers, and thus the high hydrogen evolution rate. Graphitic carbon nitride (CN) with various nitrogen contents can be prepared to regulate its electronic structure and energy band levels. The newly-prepared graphitic carbon nitride manifests high photocatalytic activity. In this work, nitrogen-rich CN (CN-NR100) and nitrogen-deficient CN (CN-ND500) were prepared by tuning nitrogen contents in CN while using isonicotinic acid (IA) as an additive in the precursors. It is found that IA reacting with urea can introduce its nitrogen to CN, while reacting with CN can take away the amino group of CN, thus reduces its nitrogen content. Interestingly, the gas that comes from the decomposition of IA is essential for the formation of porous morphology in CN. Both CN-NR100 and CN-ND500 can provide more photocatalytic sites, narrow bandgaps to enhance the absorption of visible light and significantly improve the charge carrier separation efficiency. Therefore, CN-NR100 and CN-ND500 manifest an excellent photocatalytic hydrogen evolution rate of 73 μmol h −1 (about 4 times of that of CN) and 120 μmol h −1 (6.7 times of that of CN), respectively. This work provides an efficient strategy to prepare CN with different nitrogen contents by pyrolysis of precursors modified by IA for high photocatalytic hydrogen evolution.
研究领域:
材料科学
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光化学
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催化
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DOI
高影响因子
Journal of Flow Chemistry
·
2021
·Vol. 12
·期 2
·153-160
·
IF 2.786
Liu Lanshan,Hong Xinlin,Hu Xiaohong
4-pyridinemethanol is well known as an important pharmaceutical intermediate and chemical raw material. Its preparation by electrochemical method has seen a recent explosion of interest. In this paper, we report the synthesis of 4-pyridinemethanol by electrochemical reduction of ethyl isonicotinate using an undivided flow electrolysis cell. The experiments were conducted under different conditions, including applied charge, initial concentration of ethyl isonicotinate and H 2 SO 4 , current density, and electrode materials. The yield of 4-pyridinemethanol reached up to 71 % under the optimal conditions. The oxidation of target product was avoided by using Ti/IrO 2 anode in the absence of membrane separation. Furthermore, the repeat cycle experiments and cyclic voltammetric experiments showed that this approach possessed good reproducibility and stability.
研究领域:
有机化学
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制药工程
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2014
·
IF 6.451
Delun Zheng,Qingxiang Wang,Feng Gao,Qinghua Wang,Weiwei Qiu,Fei Gao
Three CdS materials with different shapes (i.e., irregular, rod-like, and elongated hexagonal-pyramid) were hydrothermally synthesized through controlling the molar ratio of Cd 2+ to thiourea . Electrochemical experiments showed that the elongated hexagonal-pyramid CdS (eh-CdS) modified on glassy carbon electrode (GCE) had the higher electrical conductivity than the other two forms. Then the eh-CdS modified GCE was further modified with a layer of poly-isonicotinic acid (PIA) through electro-polymerization in IA solution to enhance the stability and functionality of the interface. The layer-by-layer modification process was characterized by atomic force microscopy and electrochemistry . Then 5′-amino functionalized DNA was immobilized on the electrode surface through coupling with the carboxylic groups derived from PIA-eh-CdS composite film. The hybridization performance of the developed biosensor was evaluated using methylene blue as redox indicator , and the results showed that the peak currents of methylene blue varied with target concentrations in a wide linear range from 1.0×10 −14 M to 1.0×10 −9 M with a low detection limit of 3.9×10 −15 M. The biosensor also showed high stability and good discrimination ability to the one-base, three-base mismatched and non-complementary sequence.
研究领域:
生物技术
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材料科学
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分析化学
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DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Lei Sun,Chu Zhang,Gence Bektaş,Xiaowei Li,Chunying Ma,Tingli Ma
The power conversion efficiency (PCE) of organic-inorganic halide perovskite solar cells (PSCs) developed rapidly in recent years. However, the defects at the bulk grain boundaries and heterojunction interfaces acting as non-radiative recombination centres and the ion-migration channels severely hinder the charge transport and stability of the PVKs, resulting in low PCE and poor stability. One of the principal impediments to the commercialization of PSCs resides in the challenge posed by this particular aspect. In this work, we employed 2-fluoroisonicotinic acid (2-FINA) as a passivation agent to improve the PCE and stability of n-i-p PSCs by interfacial modification strategy. Owing to the presence of carboxyl (COOH) functional groups and pyridine groups, 2-FINA can strongly interact with uncoordinated Pb 2+ and regulate the growth of perovskite crystals, which in turn reduces ion migration and suppress non-radiative recombination along with improves optical properties. Thanks to these improvements, the champion n-i-p PSC solar cell, treated with 2-FINA, showed a PCE of 20.92 %, whereas the untreated one in the same batch exhibited a PCE of 17.13 %. In long-term stability tests, we demonstrated that 2-FINA treatment significantly increases the moisture resistance of non-encapsulated devices.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
Food Analytical Methods
·
2015
·Vol. 9
·期 1
·88-94
·
IF 1.956
Jiao Zhe,Jiang Zhibin,Zhang Ni
In this study, copper(II) isonicotinate was first used as an online cleanup adsorbent in selective pressurized liquid extraction (SPLE) for determination of trace residues of polychlorinated biphenyls (PCBs) in fatty food samples. The adsorbent-to-sample ratio, extraction temperature, extraction time, recycle times, etc. were optimized. The PCBs in food samples of pork, chicken meat, and clam meat were detected by gas chromatography–mass spectrometry (GC-MS). The detection limit (S/N = 3) ranged from 0.2 ng/g wet weight (PCB 18) to 2.5 ng/g wet weight (PCB 66). Relative standard deviations (%RSDs) were lower than 12.5 %. The mean recovery was in the range of 82.4–105.1 %. Certified reference materials were analyzed with acceptable results. It was exhibited that the copper(II) isonicotinate showed higher purification capacity than other cleanup adsorbents for extraction of PCBs in fatty food. The proposed method which involved extraction-cleanup in one step can be a promising sample preparation method for food analysis.
研究领域:
分析化学
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食品安全
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产品关联
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2014
·Vol. 38
·期 1
·115-120
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IF 2.594
Zhe Jiao,Suling Zhang,Hongwei Chen
For the determination of trace residues of tetracycline antibiotics in fatty food samples, selective pressurized liquid extraction coupled with high-performance liquid chromatography and tandem mass spectrometry was applied in this study. Copper(II) isonicotinate was first used as online cleanup adsorbent in the selective pressurized liquid extraction process. The adsorbent to sample ratio, extraction temperature, extraction time, and recycle times, etc. were optimized. The tetracyclines in food samples of pork, chicken meat, and clam meat were detected by liquid chromatography with tandem mass spectrometry. Tetracycline was found at levels of 0.32 and 0.53 μg/g and oxytetracycline was found at 0.14 and 0.21 μg/g in chicken meat and clam meat, respectively, while chlorotetracycline and deoxytetracycline were below the detection limit. The detection limit (S/N = 3) for these four tetracyclines were from 0.2 to 3.3 ng/g, the recoveries were from 75.8 to 110.5%, and relative standard deviations were from 5.5 to 13.6%. Copper(II) isonicotinate showed a higher purification capacity than other cleanup adsorbents for extraction of antibiotics in fatty food and the recovery showed predominance compared with a pressurized liquid extraction method without adsorbent. The study demonstrated that copper(II) isonicotinate would be a promising cleanup adsorbent in pressurized liquid extraction for the analysis of trace organic pollutants in complicated samples.
研究领域:
分析化学
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食品安全
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环境科学
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DOI
PubMed
高影响因子
Journal of CO2 Utilization
·
2020
·
IF 5.993
Guangyong Shi,Wei Xu,Jichao Wang,Ye Yuan,Somboon Chaemchuen,Francis Verpoort
The coordination of pyridylcarboxylate (isonicotinic acid, IN) with copper (II) fabricates a Cu(IN)-MOF. The characteristic properties of the Cu(IN)-MOF are obtained via different analysis techniques such as XRD, SEM, BET, ICP, TG, etc. The advantage of copper(II) coordinated with a bi-functional organic linker (IN), containing a pyridyl and carboxylate group, is demonstrated by the chemical properties of which the Cu(II)-based MOF exhibits excellent catalytic performance for the CO 2 carboxylation of terminal alkynes. No noble-metal, co-catalyst, or additives are required to execute the reaction. The effectiveness of the Cu(IN)-MOF was demonstrated with a variety of substrates (>11). Moreover, the Cu(IN)-MOF, as a heterogeneous catalyst, can be recycled at least 5 times retaining its excellent catalytic performance. Herein, we report the first copper (II) metal-organic framework (Cu(IN)-MOF) applied for the carboxylation of alkynes with CO 2 demonstrating several advantages such as stable catalyst, avoiding the use of an expensive noble-metal, straightforward synthesis.
研究领域:
材料科学
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催化
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化学工程
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无机化学
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产品关联
DOI
高影响因子
CARBOHYDRATE RESEARCH
·
2024
·
IF 2.4
Lin Wang,Yu Pang,Zhongwen Su,Meihua Xin,Mingchun Li,Yangfan Mao
N -(sodium 2-hydroxypropylsulfonate) chitosan (HSCS), N -sulfonate chitosan (SCS) and N -isonicotinic sulfonate chitosan (ISCS) were prepared. The structures of the prepared chitosan derivatives were characterized by nuclear magnetic resonance ( 1 H NMR) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, ultraviolet–visible (UV–vis) spectroscopy and elemental analysis (EA). Antibacterial and antibiofilm activities of these chitosan derivatives were evaluated in vitro . The minimum inhibitory concentration (MIC) of HSCS and SCS against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) were 0.625 mg/mL and 0.156 mg/mL, respectively. ISCS exhibited MIC values of 0.313 mg/mL and 0.078 mg/mL against E. coli and S. aureus , respectively. ISCS demonstrated superior antibacterial and antibiofilm properties compared to SCS and HSCS. These findings suggest that the incorporation of a pyridine structure into sulfonate chitosan enhances its antibacterial and antibiofilm activities, and the prepared ISCS has a promising application prospect for controlling the reproduction of microorganisms in the field of food packaging.
研究领域:
材料科学
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微生物学
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生物技术
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食品科学
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产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 25
·3303-3310
·
IF 2.6
Meiying Wang,Chunbo Jia,Hehua Hui,Qianxiang Xu,Xiang Li,Yuanhang Ren,Bin Yue,Heyong He
Decatungstate (W10O324−, DT) is a metastable polyoxometalate anion which presents excellent photocatalytic ability. In order to stabilize the DT species, four decatungstate-based coordination polymer compounds with different DT coordination modes, namely [Cu2(3-bpo)2(H2O)2(DMSO)2][W10O32]·14H2O (1), [Cu2(3-bpo)2(DMSO)4][W10O32] (2), [Cu2(4,4′-bipy)4][H2W10O32] (3) and [Cu(4,4′-bipy)3(DMSO)(H2O)][TBA][HW10O32]·H2O (4) (DMSO = dimethyl sulfoxide, 3-bpo = 2,5-bis(3-pyridyl)-1,3,4-oxadiazole, 4,4′-bipy = 4,4′-bipyridine, TBA = tetrabutylammonium) were synthesized under controlled solvothermal conditions in the mixed solvent of DMSO and H2O. The heterogeneous photocatalytic activity of these four compounds in the degradation of rhodamine B was tested and the results show that they possess fairly high photocatalytic activity without leaching of DT during the reaction. The effect of the coordination modes of terminal oxygen (Ot) atoms in DT anions on the activity was investigated.
研究领域:
材料科学
·
化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）