JOURNAL OF MOLECULAR LIQUIDS
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2013
·
IF 1.684
Xiao-Qiu Dou,Ping Li,Siqing Lu,Xiaobing Tian,Yitian Tang,June D. Mercer-Chalmers,Chuan-Liang Feng,Di Zhang
The highly directional interactions among complex gelators of 2,6-pyridinedicarboxylic acid and 4-hydroxypyridine are investigated, which lead to the formation of ordered one-dimensional fibers with diameters of 500 nm ~ 2 μm. By scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, 1 H nuclear magnetic resonance ( 1 H NMR) spectroscopy, ultraviolet–visible (UV–vis) spectroscopy, and X-ray powder diffraction (XRD), the co-assembly of the complex into straight fibers under the function of multiple directional hydrogen bonds and π–π stackings is proved. The strong and directional interactions lead to rich dynamic behavior and high degrees of internal order among the complex gelators. The ordered one-dimensional co-assemblies possess useful functions in templated synthesis, molecular recognition , enzyme immobilization, and other biochemistry fields.
研究领域:
化学
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材料科学
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生物化学
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Qinghe Li,Lilin Yang,Hongyuan Sha,Dongling Yang,Zujian Wang,Xiaoming Yang,Rongbing Su,Bin Su,Chao He,Xifa Long
In the solar-blind region, the development of short-wave ultraviolet (UV) lasers relies critically on high-performance nonlinear optical (NLO) crystals, which require a wide bandgap, a strong second harmonic generation (SHG) response, and a sufficient birefringence to fulfil phase-matching requirements. Although sulfates possess a wide bandgap necessary for short-wave UV applications, the inherent symmetry of [SO 4 ] 2− tetrahedron typically results in an insufficient birefringence. To optimize their birefringence, the introduction of π -conjugated ligands was implemented with a good structural inducer of 4-hydroxypyridine group. It is an effective strategy to markedly augment the birefringence of sulfates as demonstrated in (C 5 H 5 NO) 2 ZnSO 4 ·H 2 O crystal with a birefringence of 0.48 @ 546 nm. Then, based on it, a new UV NLO crystal, (C 5 H 5 NO)ZnSO 4 ·3H 2 O, was obtained by modulating the coordination mode of zinc atoms to mitigate the steric hindrance and increase hydrogen bond sites. It achieves the collaborative optimization of SHG response (1.5 × KH 2 PO 4 (± 0.1)) and optical anisotropy (birefringence ∼ 0.27 @ 546 nm), originating from the synergetic contribution of 4-hydroxypyridine ligands and [SO 4 ] 2− groups. Therefore, this study establishes an innovative strategy for the structural design and performance optimization in NLO materials.
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高影响因子
ANTI-CORROSION METHODS AND MATERIALS
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2025
·
IF 2.6
Xiong Zhao,Junying Zhang,Jing Li,Ping Qiu
Purpose AQs3This study aims to explore the corrosion inhibition performance and mechanism of pyridine derivatives on the corrosion of N80 steel in a 0.5 M HCl solution using electrochemical experiments. Design/methodology/approach This study evaluates the corrosion performance of three pyridine derivatives (4-hydroxypyridine [OI], 4-aminopyridine [NI] and 4-mercaptopyridine [SI]) as organic corrosion inhibitors for mild steel in a 0.5 M HCl using potentiodynamic polarization, electrochemical impedance spectroscopy and atomic force microscopy. The bonding mechanism between the reactive groups of the inhibitor molecules and the metal surface is analyzed using theoretical calculations. Findings The corrosion inhibition efficiency of the studied inhibitors on mild steel follows the sequence: SI > NI > OI. The bonding mechanism between the reactive groups of the inhibitor molecules and the metal surface is analyzed using theoretical calculations. It is found that the reactive group changes the charge transfer and the bonding strength of the corrosion inhibitor to the metal surface, which affects the corrosion inhibition performance. Originality/value This study provides valuable insights into the role of electron transfer in the interaction between the inhibitor and the metal surface, thereby contributing to the development and design of more effective and economical corrosion inhibitors.
研究领域:
材料科学
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腐蚀与防护
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电化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Xiao Zhu,Shuhui Liu,Ruhui Shang,Xin Chen,Yingjie Xu,Yujun Guo,Baoping Ling
Three novel anion-functionalized proton ionic liquids (ILs) were prepared from superbase 1,5-diazabicyclic [4.3.0]non-5-nonene (DBN) and 2-hydroxypyridine (2-OP), 3-hydroxypyridine (3-OP) and 4-hydroxypyridine (4-OP). Then application of ILs in the CO 2 absorption have been investigated and the effects of temperature, pressure and humidity on the absorption properties of ILs were also studied. Experimental results demonstrated that such ionic liquids can exhibit outstanding reversibility and high CO 2 capacity at room temperature . In order to reveal the influence of position of substituents in anion on the absorption behavior, the physicochemical properties including density ( ρ ), viscosity( η ), and speed of sound ( u ) were measured at T = 298.15–328.15 K, which were used to calculate the molecular volume ( V m ), standard entropy ( S 0 ), lattice energy ( U POT ), isentropic compressibility coefficient ( κ s ) and thermal expansion coefficient ( α p ) of the pure ionic liquids at different temperatures. The results showed that [DBNH][2-OP] with O atom located in the ortho position of N atom appeared lower viscosity and larger free volumes as well as stronger alkalinity , which can endow it excellent CO 2 capture capacity of about 1.4 mol CO 2 /mol IL (about 0.3 g CO 2 /g IL) at 30 ºC. Based on quantum chemical calculation and 13 C NMR as well as FT-IR spectra, the chemical absorption mechanisms of the two active sites was proposed. These results provide important insights into effective strategies for CO 2 capture.
研究领域:
化学
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环境科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Ling Yu,Hui Gao,Nan Zhang,Xian-Ming Zhang
Proton-conducting materials have gained popularity owing to their extensive applications in biologic/chemical sensors, supercapacitors, proton sieving, and proton-exchange-membrane fuel cells. To date, the most commercially used polymer membrane has been the Nafion series that exhibits conductivity exceeding 0.1 S cm −1 , however, this series is expensive, has poor dimensional stability, and requires a complex synthesis process. The key criterion for selecting Nafion alternatives is to achieve the systematic integration of high proton conductivity with high stability through a simple and efficient approach. In this study, we used an aliovalent metal substitution strategy to design serial metal–organic frameworks (MOFs), including tetragonal T -Cd-BTC (CH 3 NH 2 CH 3 ) 2 [Cd(BTC)](H 2 O) and quasi-cubic quasi- C -In-BTC (C 4 H 7 N 2 )[In(BTC)] and Im@quasi- C -In-BTC (C 3 H 5 N 2 ) 2 [In(BTC)] frameworks, with 2-methylimidazolium and imidazolium cations as templates, respectively. Because of the aliovalent substitution of In(III) for Cd(II), both the metal–oxygen bond strength and unit cell symmetry gradually increased, resulting in an increase in the thermal stability of quasi- C -In-BTC and Im@quasi- C -In-BTC at temperatures of up to 700 K. Compared with in situ loaded 2-methylimidazolium quasi- C -In-BTC , Im@quasi- C -In-BTC prepared by incorporating the imidazolium cation into the pores of activated quasi- C -In-BTC exhibited a higher proton conductivity of 7.1 × 10 −2 S cm −1 at 338 K and 95 % relative humidity. Thus, Im@quasi- C -In-BTC demonstrated real-life application. This result was confirmed by integrating Im@quasi- C -In-BTC with a poly(vinyl pyrrolidone)-poly(vinylidene fluoride) polymer matrix. Density functional theory simulations indicated that Im@quasi- C -In-BTC was strongly acidic and had high water–adsorption capacities, which contributed to extensive hydrogen-bond networks and strong host–guest interactions, in accordance with the experimental finding.
研究领域:
材料科学
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化学工程
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能源科学
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2020
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IF 5.065
Lei Yuan,Hongshuai Gao,Haiyan Jiang,Shaojuan Zeng,Tao Li,Baozeng Ren,Xiangping Zhang
A novel type of dual-functionalized pyridinium-based ionic liquids (ILs) with acidic protons and hydroxyl groups , were designed and synthesized for ammonia (NH 3 ) absorption. The NH 3 absorption isotherms in dual-functionalized pyridinium-based ILs at temperatures from 303.15 to 343.15 K and pressures up to 600 kPa were computed using gas-liquid equilibrium method. It revealed that 4-pyridinemethanol bis(trifluoromethane)sulfonamide [4-MeOHPy][NTf 2 ] showed the maximum NH 3 solubility of 3.43 mol NH 3 /mol IL at 313.15 K and atmospheric pressure, surpassing any nonmetallic ILs previously reported. Furthermore, the characteristics of isotherms under low pressures behaved an obvious chemical reaction between ILs and NH 3 , and all experimental solubilities were regulated by a reaction equilibrium thermodynamic model (RETM). The thermodynamic properties were further obtained to better understand the NH 3 absorption process. The results indicated that this model endorses the 1:1 (NH 3 -IL) mole ratio of chemical reaction mechanism and the reaction enthalpy is main driving force of NH 3 absorption in ILs.
研究领域:
化学工程
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物理化学
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DOI
高影响因子
Chemical Science
·
2017
·Vol. 8
·期 3
·1769-1775
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IF 8.668
Guofeng Liu,Jinying Liu,Chuanliang Feng,Yanli Zhao
The construction of chiral supramolecular systems with desirable handedness is of great importance in materials science, chemistry, and biology since chiral nanostructures exhibit fascinating photophysical properties and unique biological effects. Herein, we report that achiral bipyridines can co-assemble with L-phenylalanine derivatives into unexpected right-handed helical nanostructures rather than a left-handed helix via intermolecular hydrogen bonding interactions formed between the pyridyl and carboxylic groups. This study opens up a route to develop chiral nanostructures with desirable handedness via the co-assembly of simple molecular building blocks and provides a straightforward insight into the chirality control of nanostructures in supramolecular systems.
研究领域:
材料科学
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化学
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生物学
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DOI
PubMed
高影响因子
AMB Express
·
2019
·Vol. 9
·期 1
·1-9
·
IF 2.226
Zhao Shuxue,Hu Chunhui,Guo Lizhong,Li Kuiran,Yu Hao
A 3-hydroxypyridine degrading bacterium, designated strain DW-1, was isolated from petroleum contaminated soil in Liao River China. 16S rRNA-based phylogenetic analysis indicates that strain DW-1 belongs to genus Agrobacterium. The optimal cultivation temperature and pH for strain DW-1 with 3-hydroxypyridine were 30 °C and 8.0, respectively. Under optimal conditions, strain DW-1 could completely degrade up to 1500 mg/L of 3-hydroxypyridine in 66 h. The 3-hydroxypyridine degradation pathway of strain DW-1 was suggested by HPLC and LC–MS analysis. The first reaction of 3-hydroxypyridine degradation in strain DW-1 was α-hydroxylation so that the major metabolite 2,5-dihydroxypyridine was produced, and then 2,5-dihydroxypyridine was transformed by a Fe2+-dependent dioxygenase to form N-formylmaleamic acid. N-Formylmaleamic acid will be transformed to maleic acid and fumaric acid through maleamic acid. This is the first report of the 3-hydroxypyridine degradation pathway and the utilization of 3-hydroxypyridine by a Agrobacterium sp. It may be potentially used for the bioremediation of environments polluted with 3-hydroxypyridine.
研究领域:
微生物学
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环境科学
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DOI
PubMed
高影响因子
OPTIK
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2022
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IF 2.84
Ruoxian Hou,Hanzhang Chen,Defu Sun,Nana Zhang,Chuanying Shen,Duanliang Wang
Using the solvent evaporation approach at room temperature (RT), we produced transparent single crystals of two new organic-inorganic hybrid materials: (C 5 H 6 NO)SO 3 NH 2 (crystal 1: reaction by sulfamate and 4-hydroxypyridine) and (C 3 H 5 N 2 )SO 3 NH 2 (crystal 2: reaction by sulfamate and imidazole). Both crystals have the same space structure and belong to the P 2 1 / c space group of the monoclinic crystal system, according to the results of X-ray single crystal diffraction. In crystals 1 and 2, sulfamic acid and organics (4-hydroxypyridine, imidazole) are alternatively positioned by hydrogen bonds to create a layered structure. Hydrogen bonds and electrostatic Coulomb forces connect the layers to one another. Powder XRD demonstrates the remarkable phase purity of both crystals. Furthermore, the optical properties of both crystals, including IR , UV absorption, and fluorescence spectra , have been investigated in detail. The presence of functional groups such as NH 2 and C C in the grown crystals was confirmed by Fourier transform infrared analysis. The optical band gaps for crystals 1 and 2 are about 4.33 and 4.31 eV, respectively, and the UV absorption findings show a low light absorption . According to the photoluminescence spectra, the two crystals have distinct fluorescence characteristics, with emission peaks of approximately 433 nm and 442 nm, apiece.
研究领域:
材料科学
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光学
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高影响因子
JOURNAL OF POLYMER SCIENCE
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2022
·Vol. 61
·期 6
·491-502
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IF 3.046
Lidong Cao,Xingzhong Fang,Guofei Chen
High imidization temperature of polyimides (PIs) brings great restriction to the applications in electronic industry. In this study, N,N ′-carbonyldiimidazole (CDI), a novel low-temperature imidization accelerator with the unique dual function of catalyst and dehydrating agent, was researched to solve this problem. PIs synthesized from 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and 4,4′-oxydianiline were researched as the main object on method A and method B, two preparation methods of PIs, by introduction of CDI, which was found that the PIs prepared by method A achieved complete imidization and basically had no residual CDI and N,N -Dimethylacetamide at 180 °C under vacuum, while the completely imidized PIs prepared by method B were also obtained at 40 °C. Even prepared at low temperature, the PI films with adding CDI both showed satisfactory thermal and mechanical properties, especially in reducing coefficient of thermal expansion. In addition, the universality of the reaction between CDI and poly(amic acid) were also verified by other soluble PI systems. All these results prove the superior performance of CDI in lowering imidization temperature, showing great potentials in low-temperature cured PIs. Graphical
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Journal of Materials Chemistry B
·
2016
·Vol. 4
·期 7
·1310-1317
·
IF 4.872
Jialin Zhang,Zhimin Chen,Hao Wu,Feng Wu,Chunying He,Bin Wang,Yiqun Wu,Zhiyu Ren
As vital biological mediators, the accurate detection of nitrite (NO2−) and hydrogen peroxide (H2O2) is desirable for clinical monitoring and diagnosis. Herein, cationic 2,9,16,23-tetra[4-(N-methyl)pyridinyloxy]phthalocyanine cobalt(II) ([TMPyPcCo]4+) and acid-treated multiwalled carbon nanotubes (aCNTs) were alternately self-assembled on the glassy carbon electrode (GCE) by means of the electrostatic interaction, leading to a 3D loose and interconnected assembly of [TMPyPcCo/aCNTs]n multilayer films. In the [TMPyPcCo/aCNTs]n films, [TMPyPcCo]4+ is anchored onto the surface of aCNTs without any inert polymer binders, which is beneficial to expose more active sites for electrocatalysis. The effective combination of [TMPyPcCo]4+ and aCNTs brings many advantages in electrochemical detection, involving the fast oriented transmission of charges, permeable channels for ion adsorption and transport, and more sensing sites, thus the [TMPyPcCo/aCNTs]n films display excellent electrochemical sensitivity towards both NO2− and H2O2. The responses of NO2− and H2O2 vary linearly with respect to the concentration from 5 µM to 30 mM and 10 µM to 9 mM. Furthermore, the superior cycling stability, reproducibility, and selectivity make [TMPyPcCo/aCNTs]n films suitable for the real samples.
研究领域:
分析化学
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生物医学工程
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材料科学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Guokai Cui,Yisha Xu,Daqing Hu,Ying Zhou,Chunliang Ge,Huayan Liu,Wenyang Fan,Zekai Zhang,Biao Chen,Quanli Ke,Yaoji Chen,Bing Zhou,Wei Zhang,Ruina Zhang,Hanfeng Lu
A series of functional ionic deep eutectic solvents (iDESs) containing pyridinolate anions were reported as green sorbents , solvents, and catalysts for highly efficient capture and transformation of CO 2 to quinazoline-2,4(1 H ,3 H )-dione and its derivatives at mild conditions via tuning the structures of iDESs. Physical properties, such as density and viscosity, as well as flow activation energy and thermal expansion coefficient, were systematically investigated. Effects of the partial pressure of CO 2 and the absorption temperature on the CO 2 absorption capacity using these functional iDESs as sorbents were studied, and the different absorption mechanisms, including carbamate and carbonate pathways, were analyzed by FT-IR and 13 C NMR spectroscopy. Additionally, thermodynamics analysis of CO 2 absorption was performed according to the chemical reaction mechanism, and K θ ,Δ r G θ m), Δ r H θ m, and Δ r S θ m were calculated. Furthermore, the effects of cations, anions, HBDs, reaction temperature, and the molar ratio of catalyst to substrate ( n Cat. / n Sub . ) on CO 2 conversion were systematically studied, and excellent isolated yield of up to 97.1% at mild conditions could be obtained with only 0.25 equiv. DES as the solvent as well as the sorbent and the catalyst. Plausible “simultaneous CO 2 activation and substrate activation” reaction mechanism of capture and transformation of CO 2 to quinazoline-2,4(1 H ,3 H )-diones by [N 2222 ][4-PyO]/DMSO (1:4) was verified by the spectra of FT-IR and based on previous reports. To the best of our knowledge, these are the first examples of tuning functional iDESs for the capture and transformation of CO 2 to quinazoline-2,4-(1 H ,3 H )-dione and its derivatives with only 0.25 equiv. DES. The method may also open a door to obtain the high efficiency of capture and transformation of such gases as NO x , SO 2 , CO, H 2 S, and CO 2 by functional DESs.
研究领域:
化学工程
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环境科学
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催化化学
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高影响因子
危险品化学品经营许可证（带存储）