CHEMICAL ENGINEERING & TECHNOLOGY
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2020
·Vol. 43
·期 11
·2160-2166
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IF 1.543
Shanshan Dai,Xiaojiang Li,Jihe Zhao,Hongsheng Lu
A green and effective extraction of oily sludge was completed by a hybrid process with tertiary amines (TA) and protonated tertiary amines (PTA), where PTA is the protonated state of TA. Compared with only TA, the crude oil recovery was improved by 3–5 % by the addition of PTA and less solid remained in the recovered crude oil. Additionally, the wettability improved with the absorption of positively charged ions of PTA on the sludge, and the interaction between heavy alkanes of crude oil and PTA promotes the detachment of crude oil from the sludge surface, enhancing the hydrophilicity of sludge. More importantly, the incomplete recovery of TA exactly takes the role of the PTA in the regenerated mixture, which can reduce the loss of solvent.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Wenqiang Wang,Guanghui Zhang,Lihua Dong,Ping Gu,Shiyuan Ding,Lian Hou
Persistent toxic heavy metal Cr(Ⅵ) oxyanions is increasingly damaging to the environment and human life safety. In this study, a novel tertiary amine chloride type cationic covalent organic framework with high yield (>95%) was synthesized using a one-step Schiff base reaction by room temperature standing two functional monomers . The adsorbent was characterized by SEM, EDS , FTIR , NMR , PXRD , BET, TGA and pH PZC . And a series of adsorption experiments were conducted to verify the removal effect for Cr(Ⅵ). It exhibited excellent adsorption performance and the adsorption equilibrium time was within 10 min, superior to most adsorbents. The adsorption conformed to the pseudo-second-order kinetics and the Langmuir adsorption isothermal models based on the values of R 2 and RMSE in the corresponding four models. The impact of pH was significant, and the maximum adsorption capacity was 161.4 mg/g at a pH of 2. The adsorbent had good adsorption selectivity for Cr(Ⅵ) oxyanions in the presence of coexisting ions (Cl − , SO 4 2− , NO 3 − , and PO 43 − ), and good recyclability with only decrease of removal rate from 98.3% to 91.5% after five cycles. The mechanism for Cr(Ⅵ) adsorption was mainly attributed to ion exchange, and hydrogen bonding also played a subordinate role. In the Cr(Ⅵ)-MO binary system, the increase for Cr(VI) adsorption results from the new active sites in methyl orange. This work highlights the mild synthetic conditions, fast adsorption rate, and good adsorption of Cr(Ⅵ), which make it a promising prospect.
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
APPLIED ENERGY
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2016
·
IF 5.746
Min Xiao,Helei Liu,Raphael Idem,Paitoon Tontiwachwuthikul,Zhiwu Liang
This work examined the relationship between the structure of various commercial tertiary amines and their activity in CO 2 absorption/desorption in terms of rate of CO 2 absorption, equilibrium CO 2 loading, p K a and heat of CO 2 absorption in order to establish possible guidelines for selection of tertiary amine components for amine blends. Results show that any electron donating group linked directly to the nitrogen atom increases their reactivity with CO 2 . In addition, the presence of steric hindrance effect and good water solubility also show enhancements in activity. In contrast, the existence of a hydroxyl group leads to a decrease in all the activity of the tertiary amine. The heat of CO 2 absorption of tertiary amines, which is closely related to the regeneration energy, can be reduced by decreasing the number of hydroxyethyl groups or by positing the hydroxyl group at the proper carbon relative to the nitrogen atom.
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
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
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2017
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IF 3.255
Danyi Lu,Qian Xie,Baojian Wu
N -glucuronidation is an important pathway for metabolism and disposition of tertiary amines in humans. This reaction is mainly catalyzed by the enzymes UGT1A4 and UGT2B10. However, the metabolic patterns of UGT1A4- and UGT2B10-mediated N -glucuronidation are not fully clear. In this study, we first optimized in vitro reaction conditions for N -glucuronidation by using specific substrates (i.e., trifluoperazine for UGT1A4, cotinine and amitriptyline for UGT2B10). Furthermore, we found that hepatic N -glucuronidation showed significant species differences. In addition, UGT1A4 and UGT2B10 were primarily responsible for N -glucuronidation of many tertiary amines, including asenapine, loxapine, clozapine, chlorpromazine, dothiepin, doxepin, mirtazapine, mianserin, chlorcyclizine, cyclizine, promethazine, cyclobenzaprine, imatinib, retrorsine, strychnine and brucine. In conclusion, this study provides an in vitro assay system for evaluating N -glucuronidation of amines. Also, UGT1A4- and UGT2B10-mediated N -glucuronidation might play significant roles in metabolism and detoxification of tertiary amines in humans.
研究领域:
药理学
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生物化学
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药物代谢
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DOI
PubMed
高影响因子
Chemical Engineering and Processing-Process Intensification
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2025
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IF 3.9
Meng-Meng Du,Yuan-Cheng Wang,Bao-Chang Sun,Yong Luo,Liang-Liang Zhang,Guang-Wen Chu,Hai-Kui Zou
Carbonic anhydrase (CA) is a high-efficiency biocatalyst that significantly improves the absorption of CO 2 by tertiary amine. This work aims to investigate kinetics behaviors from the perspective of enzymatic reaction mechanism. The influences of the CA concentration, type of tertiary amines, pH, and temperature on the reaction rate between CO 2 and tertiary amine ( ν ) and catalytic activity of CA ( φ ) were first investigated in a stopped-flow device. Adding 50 g∙m⁻³ CA enhanced ν in tertiary amine solutions by a factor ranging from 22 to 42 at 298 K and pH=9.5, demonstrating its excellent catalytic performance. The ν increased with increasing CA concentration, pH, temperature, and tertiary amine's pK a. φ increased with the increase of CA concentration, as well as the decrease of temperature, pH, and tertiary amine's pK a. Proteomics analysis further revealed that conformational changes of the CA's secondary structure induced by high pH and temperature altered the expressions of the local active-site region and deactivated CA, ultimately leading to a decrease in φ . Additionally, the CA-catalysis kinetics equation accorded with the Michaelis-Menten model, with catalytic second-order rate constants on the magnitude of 10 7 . Overall, this work provides a guideline for its industrial application in the CO 2 capture process.
研究领域:
生物化学
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环境科学
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产品关联
DOI
高影响因子
IRANIAN POLYMER JOURNAL
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2025
·
IF 2.8
Zhang Xin,Jia Lingxiao,Wang Wenjing,Zhao Haichao
Graphene oxide (GO) has emerged as ideal reinforced nanofillers in epoxy-based composites, but suffering from poor dispersion because of its high hydrophilicity, and poor compatibility with polymeric matrix which hinders its further application. In this study, a novel tertiary amine-containing compound (C-DEA) was synthesized by the reaction of diethanolamine with C12-C14 alkyl glycidyl ether, then C-DEA was used to modify GO by ionic interaction, thus GO-CDEA was obtained. Moreover, the effect of GO-CDEA content on mechanical and thermal properties of cashew phenol epoxy composite were investigated. Compared to pure epoxy resin (EP), the cashew nut phenol-based nanocomposites (0.2% (by weight) GO-CDEA) perform exceptionally excellent mechanical properties: the rupture strength is 13.76 MPa (73% higher than EP), the Young's modulus is 1049.38 MPa (201% higher than EP), and the elongation-at-break is 138.14% (145% higher than EP). The improved mechanical properties are attributed to the synergistic effect of C-DEA and well-dispersed GO nanosheets, which not only increased the crosslinking density, but also impeded the extension of cracks. Additionally, this novel GO-CDEA-reinforced bio-based renewable cashew phenol epoxy proves to be an ideal candidate for toughening epoxy-based thermosetting materials, showcasing the potential application of bio-based epoxy composite materials. Graphical abstract
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 MEMBRANE SCIENCE
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2024
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IF 8.4
Xiao Huang,Shushan Yuan,Haohan Wan,Xiujing Xing,Zhaohuan Mai,Hideto Matsuyama,Gang Zhang
Developing functional membranes with switchable pores for the separation of contaminants with different sizes has been challenging due to the lack of novel materials with adaptable and adjustable structures. Polymers containing the tertiary amine (TA) unit can be transformed via oxidation into amine oxide (AO) structure that can modulate the membrane pore size. In this study, new monomers containing pH-responsive TA units and diacyl chloride containing reducible thioether (-S-) groups were used to yield pore-size-adjustable membrane resin polyarylene sulfide sulfone amide/amide tertiary amine (PASSA/ATA) at room temperature. By varying the polymerization ratio of the reaction solution, membranes could be prepared directly through non-solvent induce phase separation (NIPS) method without extra treatment. By oxidizing the TA units to AO through acid condition (H 2 O 2 /H 2 SO 4 /CH 3 COOH), the PASSA/ATA membrane can be switched from ultrafiltration to loose-nanofiltration with the rejection of RO16 and rhodamine B increased from 18.4% to 34.3 % (pristine membrane) to 91.7 % and 98.5 %. The permeance and rejection rate of the oxidized membrane were found to recover to the initial state after alkali-treatment. The mechanism of the switchable pore size was elucidated by dissipative particle dynamics (DPD) simulations. Interestingly, the oxidized PASSA/ATA membrane showed good organic solvent resistance and in nanofiltration performance, as it was capable of retaining about 95 % of Congo red in N,N-dimethylformamide (DMF) with permeance of about 10 L m −2 h −1 bar −1 . This work presents a facile and low-carbon approach to develop novel membranes with multiple filtration capabilities, potentially applicable in various separation processes.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2025
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IF 6.2
Cong Rao,Chao Yuan,Wangjin He,Hailiang Guo,Kuitun Liu,Jianfeng Fan,Jianya Su
This study elucidates the molecular mechanism by which flavin-containing monooxygenase (FMO) mediates metabolic resistance to nereistoxin insecticides in lepidopteran pests. A field population of Spodoptera exigua exhibited 50-fold resistance with upregulated SeFMO expression. Using FMO-specific inhibitors, recombinant protein expression, and mass spectrometry, we confirmed that FMO catalyzes N-oxidation of nereistoxin insecticide at the tertiary amine nitrogen. Molecular docking revealed that insect FMO’s catalytic mechanism resembles that of human FMO. Transgenic Drosophila models demonstrated that the FMO-mediated N-oxidation enhances insecticide resistance, indicating evolutionary conservation. This highlights FMO’s role in insecticide detoxification and its conserved function across species, providing new insights into pest resistance mechanisms.
研究领域:
昆虫学
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分子生物学
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农药科学
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产品关联
DOI
PubMed
高影响因子
MACROMOLECULES
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2025
·
IF 5.2
Zhikang Yang,Yuqun Du,Qingwen Li,Jingyu Zhang,Qiaoling Li,Hongxia Yan
Developing long-wavelength emissive nontraditional fluorescent polymers remains a big challenge. Herein, we synthesized four types of oligomers (HP1–HP4) that exhibit different fluorescence colors by introducing tertiary amines and C═C using a simple transesterification polycondensation method. Intriguingly, pure HP1 containing C═C and tertiary amines emits blue, yellow green, and yellow fluorescence under the irradiation of various excitation lights, showing color-tunable emission characteristics. Compared with HP3 with only C═C groups in its main chain, the optimal excitation/emission wavelength of HP1 in solution and pure states red-shifted to 520/550 and 525/554 nm, respectively. Experimental results and theoretical calculations revealed that the formation of efficient through-space n–n and n–π interactions leads to fluorescence. The presence of tertiary amines and C═C decreases the HOMO–LOMO gap of the oligomers and makes them easy to excite, which results in the red-shifted fluorescence. The prepared oligomers show excellent applications in information encryption and luminescent hydrogel preparation.
研究领域:
材料科学
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化学
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DOI
高影响因子
ACS Omega
·
2020
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IF 2.87
Zhenghong Zhou,Kangfei Hu,Jiawei Wang,Zhibin Li,Yan Zhang,Zhenggen Zha,Zhiyong Wang
An electrochemical synthesis for quinazolines and quinazolinones was developed via a C(sp3)-H amination/C-N cleavage by virtue of the anodic oxidation. The reaction can be carried out in aqueous media under mild conditions to afford the desired products with high yields. The reaction mechanism was proposed after detailed investigation.
研究领域:
有机化学
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电化学
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DOI
高影响因子
Polymers
·
2025
·Vol. 17
·期 9
·1204
·
IF 4.9
Yi Guo,Cheng Yao
In this study, polymerized silicone surfactants were modified with polyether and tertiary amine groups with the aim of improving the surface performance. Various PSiEO/(PO)-OH(CH3) surfactants were synthesized and their structures and performance were characterized through1H NMR, FTIR spectroscopy, static surface tension, dynamic surface tension, zeta potential, and dynamic light scattering measurements. Subsequently, the modified silicones were incorporated as surfactants in aqueous solutions with different pH values. The surfactants with different hydrophobic/hydrophilic groups and end-capping groups exhibited different surface performances over a wide pH range. Thermodynamic parameters indicated that the micellization and adsorption of these surfactants were endothermic and spontaneous processes driven by entropy. The processes were hindered by increasing the solution pH and modification with hydrophobic groups. The aggregation behavior was significantly different under acidic, neutral, and basic aqueous conditions.
研究领域:
材料科学
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表面化学
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物理化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2025
·
IF 4.7
Minggang Hu,Xiaochen Wang,Can Wang,Hongtao Chu,Xinfeng Song,Guohua Dong,Jiyuan Zhang,Jin Xing
In this study, a new and simple method for synthesizing boron complexes was presented. The boron complexes with C 2 -symmetric ligands were prepared from in situ generated tertiary amine by the reaction of salicylaldehyde with primary amine in the presence of sodium borohydride. The boron complexes were characterized by 1 H and 13 C NMR spectroscopy, elemental analysis, and mass spectrometry. The crystal structures of complexes 1 and 2 were determined by single crystal X-ray diffraction method. The complex is a mononuclear boron complex with a tertiary amine ligand. The boron center is tetracoordinated with a distorted tetrahedral geometry. Catalytic activities of the boron complexes in the reduction of dyes, was investigated using sodium borohydride as a reducing agent. Complexes 1 and 2 were effective catalysts for degradation of dyes. Kinetic studies reveal that the reduction of methylene blue is of the first order. Free radical scavenging activities of the boron complexes have been tested using DPPH, ABTS and hydroxyl radicals, respectively. The result shows that the boron complexes have effective antioxidant activity.
研究领域:
化学
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材料科学
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环境科学
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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）