JOURNAL OF ORGANIC CHEMISTRY
·
2020
·
IF 4.335
Nian Zheng,Ce Liu,Ya-Nan Ding,Wei-Yu Shi,Bo-Sheng Zhang,Yong-Min Liang
Copper-catalyzed three-component redox-neutral ring opening of benzothiazoles with aryl iodides and O-benzoyl hydroxylamines for the synthesis of 1-amino-N-(2-(phenylthio)phenyl)methanimine has been developed. This one-pot reaction undergoes C–S and N–O bond cleavage and new C–S and C–N bond construction. Several control experiments excluded a free radical procedure and also demonstrated the secondary amine as a possible intermediate, which was vital to the catalytic reaction. Meanwhile, the deuteration experiment got rid of the C–H activation dehydroisomerization of the benzothiazole mechanism.
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高影响因子
RSC Advances
·
2016
·Vol. 6
·期 97
·95199-95203
·
IF 3.289
Shi-Yu Lu,Sheng-Hui Liao,Shu-Juan Bao,Meng Jin,Bo Weng,Chang-Ming Li
The excellent selectivity and anti-interference ability of enzyme-based biosensors have attracted considerable attention by researchers. However, the short lifetime, difficult electron transfer, and easily leak from the supporting materials restrict the practical applications of enzyme. In this study, an enzyme–inorganic hybrid biosensor constructed from slack Hb–Mn3(PO4)2·3H2O nanosheets was prepared by a simple and effective in situ immobilization method. Designed as an H2O2 sensor, it exhibits a fast electron transfer rate constant (ks = 4.16 s−1), an ultra-wide linear range for H2O2 detection (20 to 56 100 μM), and long life-time (85% of initial response after 29 days), which may be attributed to the effective immobilization of the enzyme and the good biocompatibility of Mn3(PO4)2·3H2O. For the detection of a real sample, the range of recovery of our designed biosensor was around 98.2–102.6%, confirming that our proposed method presents a promising immobilization enzyme-based biosensor for use in practical applications.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Pengyun Zhang,Junjie Chen,Lixin Song,Ningxia Gu,Pingfan Du,Xiang Chen,Leying Zha,Wei-Hsiang Chen,Jie Xiong
As known, some defect states of perovskite film still seriously affect the efficiency and stability of perovskite solar cells (PSCs), and different passivation approaches have different passivation principles, areas, degrees and additional effects on perovskite films. Herein, in this contribution, we design a three-step optimization method including interface optimization and additive passivation strategies for enhancing the quality of perovskite films all-round, thereby increasing the power conversion efficiency (PCE) as well as enduring stability of PSCs which fabricated in atmospheric environment. We employ the L-aspartic acid (L-Asp) buffer layer which rich in amino acids, the cross-linking Sodium Glycinate (SG) additive with carboxylate and small amount of 2-Hydroxyacetophenone (2-HA) containing carbonyl groups to modify the bottom, inner and top parts of perovskite films, respectively. As a result, the passivated internal and surface defects of perovskite film could achieve an enlarged average grain size (500 nm) and display more defect-less, dense morphology. The strengthened interfacial charge transport ability can significantly improve the photovoltaic performance of devices. Consequently, the optimized PSC bring about the negligible hysteresis of photocurrent and a dramatic 20.71% PCE. Moreover, the temperature and moisture stability of optimized PSCs are both remarkably enhanced. The normalized PCE of un-encapsulated device which modified via 2-HA could still retain 80% of its original value after placed in the dark for 100 hours at 50% relative humidity and 85 °C, simultaneously. Overall, this simple and practical strategy supplies a hopeful channel to facilitate the commercialized PSCs.
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高影响因子
AICHE JOURNAL
·
2025
·Vol. 71
·期 8
·e18862
·
IF 4
Yue Zhang,Rongrong Zhang,Shuzhen Lyu,Xiangwei Ren,Guozhu Liu,Li Wang
Supported Pd-based nanoparticles are widely regarded as the most effective catalysts for 2-ethylthraquinone hydrogenation. Herein, the heteroenergetic dual-supports were prepared by coating resorcinol-formaldehyde (RF) resin on mesoporous SBA-15 to regulate the growth and surface microenvironment of Pd. After calcination and reduction, phenolic hydroxyl groups in the residual carbon layer effectively reduced the Pd particle size, induced the formation of adjacent Pd 0 –Pd δ+ , and created hydrophobicity. Density functional theory calculations revealed that Pd atoms preferentially interact with OH on C, rather than with OH on SBA-15, providing an intrinsic driving force for smaller Pd particle size. The mass ratio of RF to SBA-15 was shown to be a crucial parameter affecting the catalytic performance. At the ratio of 4 (carbon content of 2.02%) the catalyst possesses the smallest Pd particles, 30% Pd δ+ proportion, and higher hydrophobicity, achieving the best catalytic performance, with an activity of 0.57 molH 2 ·gPd −1 ·min −1 and a selectivity of 95.3%.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 25
·1-14
·
IF 2.8
Zhang Simin,Ning Suiting,Zhao Wenzeng,Yang Xuanye,Chen Zhiquan,Wu Yichu
CuAlO \(_{2}\) as an oxide thermoelectric material has attracted researchers’ attention because of its low-cost and high-temperature stability. In this work, CuAl \(_{1-x}\) O \(_{2}\) + Gd \(_{x}\) ( x =0, 0.01, 0.03, 0.04, 0.06, 0.1) samples were synthesized by solid-state reaction and spark plasma sintering. Positron annihilation measurements showed that doping with a small amount of Gd ( \(x \le\) 0.03) inhibits the growth of Cu vacancy and vacancy cluster size, which improves the carrier mobility of the sample and optimizes the electrical conductivity and power factor of the sample. With further increase of Gd content, both the vacancy cluster size and concentration shows increase, which leads to fast decrease of the mobility. Finally, the sample CuAl \(_{0.97}\) O \(_{2}\) +Gd \(_{0.03}\) exhibits the best thermoelectric performance at 773 K, with the highest zT value of 5.824 \(\times\) 10 \(^{-3}\) , which is 40.39% higher than that of the intrinsic CuAlO \(_{2}\) . The average zT of CuAl \(_{0.97}\) O \(_{2}\) +Gd \(_{0.03}\) between 303 K and 773 K is also 38.9% higher than that of the intrinsic sample.
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TOXICOLOGY LETTERS
·
2017
·
IF 3.858
Huaicheng Chen,Zongming Song,Shilong Ying,Xi Yang,Wei Wu,Qiufan Tan,Xin Ju,Wencan Wu,Xin Zhang,Jia Qu,Yi Wang
Retinal ischemia reperfusion (I/R) injury is common in many ophthalmic diseases. Recent studies have shown that toll-like receptor 4 (TLR4) is involved in ischemic retinal injury. Activation of TLRs requires specific accessory proteins such as myeloid differentiation protein 2 (MD2), which facilitate in ligand responsiveness. Therefore, inhibiting MD2 may be a novel approach to modulate TLR4 signaling and deleterious downstream effects in ischemic retinal injury. We used human Müller MIO-M1 cells treated with tert-butyl hydroperoxide (TBHP) to establish an in vitro I/R model of oxidative injury and tested the therapeutic effect of inhibiting MD2. Furthermore, we inhibited MD2 in a mouse model of retinal I/R injury and confirmed the results using MD2 knockout mice. Our studies show that pharmacological inhibition of MD2 prevented TBHP-induced reactive oxygen species (ROS) generation, inflammation and subsequent apoptosis in Müller cells. We also show that retinal I/R injury in mice induced functional deficits, increased ROS levels, inflammation and apoptosis. These pathological changes were not observed in MD2 knockout mice and attenuated when MD2 was inhibited in wildtype mice. In addition, we discovered that the mechanism of these therapeutic effects involved regulation of NADPH oxidase 4 (NOX4)-MD2-TLR4 complex formation. This study provides evidence that MD2 plays a key role in the pathogenesis of retinal I/R damage by participating in TLR4-NOX4 complex formation and elaboration of oxidative and inflammatory damage. Hence, inhibition of MD2 may reduce TLR-dependent damage during retinal I/R injury.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 7
·3045-3051
·
IF 3.288
Junkang Guo,Yanping Li,Xinhao Ren,Huihui Xu,Ting Wei,Honglei Jia,Li Hua,Yi Zhang,Yongtao Li
A hydrophobic functional ionic liquid (IL) [N4444]AOT based on bis(2-ethylhexyl)sulfosuccinate anions was designed and synthesized for cadmium extraction. To study the characteristics of [N4444]AOT, Fourier transform infrared (FTIR) spectroscopy, hydrogen nuclear magnetic resonance spectroscopy (1H NMR), and thermogravimetric analysis were used. The extraction ability of [N4444]AOT towards Cd under ultrasonic conditions was also investigated. The results showed that more than 95.08% of Cd in a water solution could be extracted with [N4444]AOT under ultrasonic conditions. The results of FTIR and 1H NMR analyses showed that Cd mainly coordinated with the S–O bond provided by [N4444]AOT during extraction. The extraction of Cd from soil with [N4444]AOT was high and reached the value of 62.57%. Furthermore, [N4444]AOT could extract some stable and bound Cd species from the soil, which existed in a weakly acidic, reducible or oxidizable state. The application of [N4444]AOT significantly decreased the bioavailability of Cd in the soil. [N4444]AOT can be a good agent for Cd-contaminated soil remediation without changing the soil properties.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 10
·106518
·
IF 4.386
Qingxiao Zhang,Pei Han,Hui Zhang,Jixin Yao,Xinyu Wang,Dongmeng Chen,Xueqin Zuo,Qun Yang,Shaowei Jin,Guang Li
The oxygen evolution reaction (OER) is a critical process in the operation of electrochemical water splitting. Metal-organic frameworks (MOFs) are applied in the field of OER electrocatalysis because of their unique structure, but the high impedance and unstable framework during pyrolysis remain unresolved. Here, MIL-88A (iron-based MOF) was modified by hydrolysis and loading Co(OH)2 to improve the catalytic activity. The electrochemical results showed that the Co(OH)2/MIL-88A achieved the optimized performance with the current density of 10 mA cm−2 at 278 mV (vs RHE). Density functional calculations (DFT) combined with characterization tests suggest that electrons transfer from Co(OH)2 to MIL-88A at the interface of the heterostructure, leading to a larger hole electron pair density. D-band theory calculations demonstrated that the synergistic effect of MIL-88A and Co(OH)2 in heterostructure strengthens the adsorption between active sites and adsorbate. The above proofs are the source of the excellent OER performance of the Co(OH)2/MIL-88A. The finding has certain reference significance for the heterogeneous treatment of iron-based MOF catalysts.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Zhong Wang,Si-Fu Tang,Xiaomin Hou
As a most abundant plasticizer , Di-(2-ethylhexyl) phthalate (DEHP) has been widely used in agriculture with an associated potential toxicity to many species including plants via the production of the excessive reactive oxygen species (ROS). However, the potential toxic mechanisms of the plasticizer DEHP-induced oxidative damage to plants remain unknown. The antioxidant enzyme glutathione peroxidase has been suggested as biomarkers to reflect over excessive oxidative stress . In this study, the effect of DEHP on AtGPX6 was evaluated by multi-spectroscopic techniques and molecular docking method. The fluorescence intensity of AtGPX6 was reduced by the static quenching mechanism upon the addition of DEHP. The predominant forces in complex formation was mainly impelled by hydrogen bonding and Van der Waals forces based on the negative Δ H and Δ S , which was in accordance with the molecular docking results. In addition, the secondary structural changes resulted from the complex formation were investigated in presence of different amounts of DEHP by the combination of fluorescence, UV–vis absorption and Circular dichroism spectra, which revealed the loosening and unfolding of the framework of AtGPX6 accompanied with the enhancement of the hydrophilicity around the tryptophan residues . The exploration of the interaction mechanism of DEHP with AtGPX6 at molecular level would help to evaluate the toxicity of the plasticizers and forecast the related adverse effects on plants.
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高影响因子
MOLECULES
·
2024
·Vol. 29
·期 19
·4709
·
IF 4.2
Xinyu Liu,Shu Wang,Mingxia Wang,Lifang Chen,Zhiwen Qi
The esterification of 1-methoxy-2-propanol (PM) and acetic acid (AA) is an important reaction for the production of 1-methoxy-2-propyl acetate (PMA). Herein, we used the macroporous ion-exchange resin Amberlyst-35 as a catalyst to explore the effects of reaction conditions on the reaction rate and equilibrium yield of PMA. Under the optimized conditions of a reaction temperature of 353 K, using the initial reactant PM/AA with a molar ratio of 1:3, and a catalyst loading of 10 wt%, the PMA equilibrium yield reached 78%, which is the highest equilibrium yield so far. The reaction equilibrium constants and activity coefficients were estimated to obtain reaction thermodynamic properties, indicating the exothermicity of the reaction. Furthermore, pseudo-homogeneous (PH), Eley–Rideal (ER), and Langmuir–Hinshelwood–Hougen–Watson (LHHW) kinetic models were fitted based on experimental reaction kinetic data. The results demonstrate that the LHHW model is the most consistent with experimental data, indicating a surface reaction-controlled process and exhibiting an apparent activation energy of 62.0 ± 0.2 kJ/mol. This work represents a valuable example of calculating reaction thermodynamics and kinetics, which are particularly essential for promising industrial reactor designs.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Fang Wu,Yuhong Jiao,Jinlong Ge,Yujun Zhu,chao feng,Zhong Wu,Chang-Peng Lv
Exploring highly active, low-cost electrocatalysts for oxygen evolution reaction (OER) is of great significance but still a major challenge. Here, we synthesized Ni(OH)2@Ni(Fe)OOH with a sea urchin structure on nickel foam via a simple hydrothermal and subsequent soaking process. Experimental results indicate that incorporation of Fe into Ni(OH)2 is favorable for modulate the electronic structure, faster electron transfer and improved intrinsic activity, thereby leading to excellent OER activity. The optimized Ni(OH)2@Ni(Fe)OOH exhibits superior OER activity with overpotentials of 245 and 310 mV at 10 and 100 mA cm-2, respectively, and a small Tafel slope of 40.7 mV dec-1, and along with high stability over 100 h, which is more active than benchmark RuO2 and sever control samples without introduction of Fe. More importantly, the overall water splitting system by using Ni(OH)2@Ni(Fe)OOH-100 as anode and Pt/C as the cathode only requires a cell voltage of 1.54 V to afford 10 mA cm-2. This work not only demonstrate the key factor of Fe doping, but also offers a new path for the development of NiFe-based OER catalysts.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xinyu Guo,Jiaxin Li,Fanze Meng,Dongdong Qin,Xueyan Wu,Yan Lv,Jixi Guo
Properly design and manufacture of bifunctional electrocatalysts with superb performance and endurance are crucial for overall water splitting. The interfacial engineering strategy is acknowledged as a promising approach to enhance catalytic performance of overall water splitting catalysts. Herein, the Ru nanoparticles modified Ni 3 Se 4 /Ni(OH) 2 heterostructured nanosheets catalyst was constructed using a simple two-step hydrothermal process. The experimental results demonstrate that the abundant heterointerfaces between Ru and Ni 3 Se 4 /Ni(OH) 2 can increase the number of active sites and effectively regulate the electronic structure, greatly accelerating the kinetics of the hydrogen evolution reaction (HER)/oxygen evolution reaction (OER). As a result, the Ru/Ni 3 Se 4 /Ni(OH) 2 /NF catalyst exhibits the low overpotential of 102.8 mV and 334.5 mV at 100 mA cm −2 for HER and OER in alkaline medium, respectively. Furthermore, a two-electrode system composed of the Ru/Ni 3 Se 4 /Ni(OH) 2 /NF requires a battery voltage of just 1.51 V at 10 mA cm −2 and remains stable for 200 h at 500 mA cm −2 . This work provides an effective strategy for constructing Ru-based heterostructured catalysts with excellent catalytic activity.
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