Article
Engineering, Chemical
Suresh S. Jain, Ganapati D. Yadav
Summary: The study systematically investigated the kinetics and mechanism of ionic liquid catalyzed solvent less liquid-phase O-methylation reaction. The reaction was found to be pseudo zero order with respect to p-cresol and first order with respect to DMC, with the type of cation and anion affecting the catalytic activity of ionic liquids. Tetra butyl phosphonium bromide ionic liquid showed excellent performance in terms of activity, selectivity, reusability, recyclability, and stability.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Chemistry, Physical
Baoqin Wu, Yao Sheng, Linkai Zhou, Runduo Hong, Lifan Zhang, Xinfeng Ren, Xiujing Zou, Xingfu Shang, Xionggang Lu, Xueguang Wang
Summary: The O-methylation of catechol using dimethyl carbonate and APO catalysts was studied for the production of guaiacol. The P/Al molar ratio and catalyst calcination temperature were found to significantly affect the catalytic performance. APO (P/Al = 0.7) showed the highest catalytic activity and stability.
Article
Chemistry, Applied
Davide Dalla Torre, Mattia Annatelli, Fabio Arico
Summary: Dimethyl isosorbide (DMI) is a bio-based solvent that can replace conventional dipolar media for green purposes. Previous methods for synthesizing DMI involve toxic halogen compounds, while a more sustainable approach is to use dimethyl carbonate (DMC), which is biodegradable and less toxic. This study reports the synthesis of DMI using DMC chemistry promoted by heterogeneous acid catalysts for the first time, optimizing reaction conditions and exploring the reaction mechanisms.
Article
Chemistry, Physical
Wenjuan Fang, Yaqin Zhang, Zifeng Yang, Zhencai Zhang, Fei Xu, Weiwei Wang, Hongyan He, Yanyan Diao, Yanqiang Zhang, Yunjun Luo
Summary: An efficient synthetic strategy for bio-based polycarbonate was developed using tetramethylammonium-based amino acid ionic liquids as catalysts. By modifying the structure of the catalysts, the conversion of ISB and the molecular weight of PIC could be remarkably improved. The highest catalytic activity was observed with tetramethylammonium arginine due to its multiple active sites and high basicity.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Physical
Yuxin Wu, Yuncheng Ding, Jianhong Xu, Yundong Wang, Kathryn Mumford, Geoffrey W. Stevens, Weiyang Fei
Summary: The study developed a continuous-flow microreaction system for the synthesis of propylene carbonate, and comprehensively evaluated the effects of reaction temperature, molar fraction of catalyst, operating pressure, residence time, molar ratio of CO2/PO, and recycling performance of catalyst on the overall performances. Under different reaction conditions, the flow patterns varied between slug flow and annular flow. The results showed that at 140 degrees C and 3.0 MPa with a residence time of 166 s, the yield of propylene carbonate (PC) can reach 99.7%, and the recycling performance of the designed system greatly conforms the future trend of green chemistry.
GREEN ENERGY & ENVIRONMENT
(2021)
Article
Materials Science, Multidisciplinary
Ming Wang, Ge Zhang, Jinli Zhou, Hanrui Cao, Junjie Zheng, Huan Jing, Lixin Du
Summary: This study investigated the dissolution of waste wool using an ionic liquid solvent and an additive, and found that the additive enhanced the solubility of keratin. The dissolution process resulted in a reduction in molecular weight and degradation of the keratin structure. However, the protein nature and function of keratin were retained. The study also suggested that the solvent and additive could induce minor structural alterations in wool without significantly modifying its properties.
Article
Engineering, Marine
Zuzanna Sylwestrzak, Aleksandra Zgrundo, Filip Pniewski
Summary: Ionic liquids (ILs) are considered a solution for creating and using environmentally friendly compounds with desirable properties. However, recent studies have revealed the potential toxic effects of ILs, especially in aquatic environments. An experiment using 1-butyl-3-methylimidazolium chloride ([BMIM]Cl), the least hazardous among imidazolium chloride ILs, was conducted on Baltic microphytobenthic communities to assess the environmental impact. The results showed that even at safe concentrations, [BMIM]Cl had a negative effect on microalgal cells and population size. Only a small number of species showed resistance and dominated the communities.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Li Shang, Ni Guanhua, Nie Baisheng, Lu Shouqing, Li Xijian, Wang Gang
Summary: This study modified the microstructure of coal through the synergistic effect of oxidizing acid and ionic liquid, revealing that the synergistic treatment makes the molecular structure of coal more unstable, increases the aromaticity, makes the microstructure more compact, and tends to graphitization.
Article
Energy & Fuels
Wenqiang Liu, Yajuan Wang, Juan Zhang, Qingwen Shan
Summary: In this study, large particle spherical poly-ionic liquid-solid base catalyst (PILs-FL) was successfully synthesized by suspension polymerization and characterized. The optimal reaction conditions for vinyl carbonate and methanol reaction to form dimethyl carbonate (DMC) were determined. The PILs-FL catalyst exhibited high catalytic activity and stability under the optimized conditions.
Article
Energy & Fuels
Niloofar Nasirpour, Seyyed Mohammad Mousavi
Summary: The study investigated the effects of particle size on the pretreatment of sugarcane bagasse using PEG-assisted [BMIM][Cl], finding that medium particles were most affected by process parameters and had the highest enzymatic conversion rates.
BIOENERGY RESEARCH
(2021)
Article
Energy & Fuels
Gitanjali Pradhan, Yogesh Chandra Sharma
Summary: Glycerol carbonate is a trending value added chemical in various industries, with researchers focusing on its synthesis from glycerol as a by-product of biodiesel. The use of a highly efficient heterogeneous Mg/ZnO base catalyst for the transesterification of glycerol with dimethyl carbonate was successful in producing glycerol carbonate with high conversion rates.
Article
Chemistry, Physical
Tarnveer Kaur, Poonam Patyar
Summary: This study investigates the impact of ionic liquids (ILs) on the thermophysical and FTIR properties of protein model compounds in aqueous solutions. The interaction parameters and thermodynamic parameters calculated from density and viscosity data provide insights into the behavior of amino acids in IL solutions. The research also analyzes the effects of temperature, alkyl chain length, and ILs on the interactions in ternary systems.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Jing Ding, Peiru Wang, Yuting He, Linyan Cheng, Xue Li, Cheng Fang, Hongping Li, Hui Wan, Guofeng Guan
Summary: By synthesizing porous sulfonyl binuclear carbonate poly(ionic liquid)s (SC-PILs), the efficient catalytic reaction of diluted CO2 with epoxides and methanol can be achieved, providing a better choice for high-value utilization of diluted CO2.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Chemical
Junteng Ma, Weihua Shen, Wenxuan Wei, Yunjin Fang
Summary: The catalytic activity of an ionic liquid catalyst decreased during the transesterification reaction of propylene carbonate with methanol to dimethyl carbonate. This deactivation was attributed to the interaction between the strong basic sites of the catalyst and the carbonyl compounds present in the reaction mixture. The presence of water accelerated this deactivation process by generating OH- ions, which reacted with the carbonyl structures in the reaction mixture to form inactive HCO3- compounds, leading to catalyst deactivation. A plausible mechanism for this deactivation was proposed.
CHEMICAL ENGINEERING & TECHNOLOGY
(2022)
Article
Spectroscopy
Nicola Calisi, Stefano Martinuzzi, Andrea Giaccherini, Christian Silvio Pomelli, Lorenzo Guazzelli, Stefano Caporali
Summary: Ionic liquids (ILs) have unique physical and solvation properties that make them ideal candidates for applications in metal-catalyzed reactions. However, a deeper understanding of their surface physical chemistry and chemical composition is crucial to fully exploit their potential in heterogeneous catalysis.
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
(2021)
Article
Chemistry, Analytical
Wei Feng, Hao Li, Min-Jie Xue, Qiao-Li Zhang, Shi-Lei Liu, Qin-Hua Song
Summary: In this study, four quinoline-2-thiones were developed as fluorescent probes for the rapid and sensitive detection of sulfur mustard gas and its analogues. The probes exhibited high sensitivity and selectivity, showing potential application in the field detection of mustard gas.
ANALYTICA CHIMICA ACTA
(2021)
Article
Chemistry, Applied
Fentahun Wondu Dagnaw, Yi-Ping Cai, Qin-Hua Song
Summary: In this study, three meso-substituted BODIPY piperazines were prepared for the rapid and sensitive detection of nerve agent simulants. Among them, BPA-2 showed the best fluorescence sensing performance with the lowest detection limits. Polymer test strips embedded with BPA-2 exhibited rapid response, high sensitivity, and selectivity for detecting nerve agents in gas phase.
Article
Engineering, Environmental
Min-Jie Xue, Xiu-Zhi Wei, Wei Feng, Zhong-Fang Xing, Shi-Lei Liu, Qin-Hua Song
Summary: Two fluorescent probe molecules have been developed for rapid and sensitive detections of mustard gas and its analogues in both solutions and gas phase. The method can quickly detect mustard gas at 60 degrees Celsius with high sensitivity and excellent stability in the detection systems.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Organic
Fang-Yuan Nie, Yi-Ping Cai, Qin-Hua Song
Summary: In this paper, a photocatalyst-free and visible light-driven decarboxylative alkylation of pyridinaldehydes is developed. The reactions are initiated by photoinduced single electron transfer and successfully convert pyridinaldehydes and 2-quinolinaldehydes to the corresponding ketones. Besides, this method also enables two other transformations.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Materials Science, Biomaterials
Xiang-Gen Chen, Yuan Mei, Qin-Hua Song
Summary: In this article, a new fluorescent probe, CouSePh, was developed for the discriminative detection of three biothiols in biological systems. By introducing 4-phenylselenium as the active group, the probe showed a rapid and sensitive response to the biothiols.
JOURNAL OF MATERIALS CHEMISTRY B
(2022)
Article
Chemistry, Applied
Xiang-Gen Chen, Yuan Mei, Qin-Hua Song
Summary: In this paper, a novel fluorescent probe was developed for the selective detection of biothiols in biological systems. The probe has been successfully applied to sense biothiols in living cells.
Article
Chemistry, Analytical
Wei Feng, Xiao-Jun Liu, Min-Jie Xue, Qin-Hua Song
Summary: In this study, a fluorescent probe with two sensing sites was developed to detect and distinguish mustard gas and phosgene. The probe showed high sensitivity and selectivity towards mustard gas, as well as high selectivity towards phosgene. Additionally, a portable test strip was prepared to qualitatively and quantitatively detect 2-chloroethyl ethyl sulfide and phosgene using the RGB channel intensity of the test strip measured by a smartphone with an RGB color application.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Applied
Xu-Li Miao, Wei Feng, Qin-Hua Song
Summary: In this study, three electron donor-acceptor fluorescent probes were developed for rapid detection of phosgene. Among them, probe 2a showed the fastest response time (5 s), the lowest limit of detection (1.4 nM), and significant fluorescence change from green to bright blue in solution. Test strips fabricated with probe 2a exhibited good selectivity and sensitivity for phosgene detection in the gas phase.
Article
Chemistry, Analytical
Xiao-Jun Liu, Wei Feng, Qin-Hua Song
Summary: A novel fluorescent probe PCS was developed for rapid and selective detection of SM and its simulant CEES. PCS showed excellent chemical and photostability, and could generate reactive species for rapid detection within 90 seconds. The probe also enabled in situ detection and gas phase detection of CEES with high sensitivity, as well as facile and rapid detection of CEES-contaminated surfaces.
ANALYTICAL METHODS
(2023)
Article
Chemistry, Organic
Yi-Ping Cai, Meng-Yue Ma, Xiao Xu, Qin-Hua Song
Summary: The dearomatization of N-(o-haloarylformyl)indoles has been achieved using photochemical methods, specifically with a photocatalyst or direct excitation via stepwise reduction/protonation. A visible light-driven dearomatization of an N-(o-haloarylformyl)indole in an electron donor-acceptor complex with a thiophenol is reported, with mechanistic studies revealing the formation of 2-arylindoline through photoinduced electron transfer and radical reaction. This photochemical method is versatile, allowing for the conversion of a wide range of substrates and providing a new alternative approach to developing the dearomatization of N-arylformylindoles.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Yuan Mei, Ziyun Li, Kuanrong Rong, Zijuan Hai, Wenjian Tang, Qin-Hua Song
Summary: A dual functional BODIPY fluorescent probe has been developed for simultaneous detection of H2O2 and viscosity. Bioimaging results show that H2O2 accumulates and cytoplasmic viscosity increases during PA-induced pyroptosis.
CHEMICAL COMMUNICATIONS
(2023)
Article
Materials Science, Biomaterials
Yuan Mei, Qin-Hua Song
Summary: Real-time and sensitive detection of biothiols is crucial in biomedical research and clinical diagnosis. This study successfully developed a series of highly sensitive and selective fluorescent probes for the rapid detection of biothiols and discrimination between GSH and Cys/Hcy. Compared to existing probes, these new probes exhibited lower detection limits and faster response times, making them ideal for detecting biothiols in live cells.
JOURNAL OF MATERIALS CHEMISTRY B
(2022)
Article
Chemistry, Multidisciplinary
Hong-Wei Chen, Hong-Cheng Xia, O. A. Hakeim, Qin-Hua Song
Summary: Four hemicyanine probes have been developed for selectively detecting sulfites, with the 7-cyano probe showing the highest sensitivity and lowest detection limit. These probes demonstrate an increase in fluorescence via a Michael addition when responding to sulfites, and have been successfully used for detection in biological environments.
Article
Chemistry, Multidisciplinary
Yuan Mei, Hao Li, Cheng-Zhou Song, Xiang-Gen Chen, Qin-Hua Song
Summary: The BODIPY fluorescent probe ASeBD, constructed with 8-arylselenium as the active group, enables rapid and sensitive detection as well as dual-channel discrimination of GSH and Cys/Hcy in solution and living cells, with its mechanism demonstrated.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Organic
Hong-Wei Chen, Qin-Hua Song
Summary: This study presents a direct regioselective benzoyloxylative dearomatization of alpha- and beta-naphthols by benzoyl peroxide in an air atmosphere, under radical inhibitor- and catalyst-free conditions, at room temperature. The methodology offers a new efficient strategy for the construction of alpha-ketol derivatives with oxo-quaternary carbon center from naphthols with good to excellent yields.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2021)