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Conradie J, Erasmus E. Cobalt complexes with multi-dentate N-donor ligands: Redox, X-ray Photoelectron Spectroscopic and theoretical study. RESULTS IN CHEMISTRY 2023. [DOI: 10.1016/j.rechem.2023.100818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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2
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Wang L, Papoular RJ, Horwitz NE, Xie J, Sarkar A, Campisi D, Zhao N, Cheng B, Grocke GL, Ma T, Filatov AS, Gagliardi L, Anderson JS. Linker Redox Mediated Control of Morphology and Properties in Semiconducting Iron-Semiquinoid Coordination Polymers. Angew Chem Int Ed Engl 2022; 61:e202207834. [PMID: 36070987 PMCID: PMC9827883 DOI: 10.1002/anie.202207834] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Indexed: 01/12/2023]
Abstract
The emergence of conductive 2D and less commonly 3D coordination polymers (CPs) and metal-organic frameworks (MOFs) promises novel applications in many fields. However, the synthetic parameters for these electronically complex materials are not thoroughly understood. Here we report a new 3D semiconducting CP Fe5 (C6 O6 )3 , which is a fusion of 2D Fe-semiquinoid materials and 3D cubic Fex (C6 O6 )y materials, by using a different initial redox-state of the C6 O6 linker. The material displays high electrical conductivity (0.02 S cm-1 ), broad electronic transitions, promising thermoelectric behavior (S2 σ=7.0×10-9 W m-1 K-2 ), and strong antiferromagnetic interactions at room temperature. This material illustrates how controlling the oxidation states of redox-active components in conducting CPs/MOFs can be a "pre-synthetic" strategy to carefully tune material topologies and properties in contrast to more commonly encountered post-synthetic modifications.
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Affiliation(s)
- Lei Wang
- Department of ChemistryUniversity of Chicago5735 S Ellis AveChicagoIL 60637USA
| | | | - Noah E. Horwitz
- Department of ChemistryUniversity of Chicago5735 S Ellis AveChicagoIL 60637USA
| | - Jiaze Xie
- Department of ChemistryUniversity of Chicago5735 S Ellis AveChicagoIL 60637USA
| | - Arup Sarkar
- Department of ChemistryUniversity of Chicago5735 S Ellis AveChicagoIL 60637USA
| | - Dario Campisi
- Department of ChemistryUniversity of Chicago5735 S Ellis AveChicagoIL 60637USA
| | - Norman Zhao
- Department of ChemistryUniversity of Chicago5735 S Ellis AveChicagoIL 60637USA
| | - Baorui Cheng
- Department of ChemistryUniversity of Chicago5735 S Ellis AveChicagoIL 60637USA
| | - Garrett L. Grocke
- Pritzker School of Molecular EngineeringUniversity of Chicago5735 S Ellis AveChicagoIL 60637USA
| | - Tengzhou Ma
- Pritzker School of Molecular EngineeringUniversity of Chicago5735 S Ellis AveChicagoIL 60637USA
| | | | - Laura Gagliardi
- Department of Chemistry, Pritzker School of Molecular Engineering, James Franck Institute and Chicago Center for Theoretical ChemistryUniversity of Chicago5735 S Ellis AveChicagoIL 60637USA
| | - John S. Anderson
- Department of ChemistryUniversity of Chicago5735 S Ellis AveChicagoIL 60637USA
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3
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Otlyotov AA, Minenkov Y, Zaitsau DH, Zherikova KV, Verevkin SP. "In Vitro" and "In Vivo" Diagnostic Check for the Thermochemistry of Metal-Organic Compounds. Inorg Chem 2022; 61:10743-10755. [PMID: 35797430 DOI: 10.1021/acs.inorgchem.2c00959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Volatile metal β-diketonates are of interest from both practical and theoretical perspectives (manufacturing of film materials, catalysis, and the nature of metal-ligand bonding). Knowledge of their reliable thermochemical properties is essential for effective applications. However, there is an unacceptable scattering of the available data on the enthalpies of formation. In this work, we proposed "in vitro" and "in vivo" diagnostic tools to verify the available enthalpies of formation in both the crystalline and gaseous states for metal tris-β-diketonates. The "in vitro" procedure involved high-level quantum-chemical calculations and was applied to define a consistent data set on the enthalpies of formation for iron(III) β-diketonates. This data set has provided the basis for "in vivo" structure-property-based diagnostics to evaluate the robustness of the thermochemical data for β-diketonate tris-complexes with metals other than iron.
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Affiliation(s)
- Arseniy A Otlyotov
- N. N. Semenov Federal Research Center for Chemical Physics RAS, Moscow 119991, Russian Federation
| | - Yury Minenkov
- N. N. Semenov Federal Research Center for Chemical Physics RAS, Moscow 119991, Russian Federation.,Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow 125412, Russian Federation
| | - Dzmitry H Zaitsau
- Department of Physical Chemistry and Faculty of Interdisciplinary Research, Competence Centre CALOR, University of Rostock, 18059 Rostock, Germany
| | - Kseniya V Zherikova
- Nikolaev Institute of Inorganic Chemistry of Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russian Federation
| | - Sergey P Verevkin
- Department of Physical Chemistry and Faculty of Interdisciplinary Research, Competence Centre CALOR, University of Rostock, 18059 Rostock, Germany.,Department of Physical Chemistry, Kazan Federal University, Kazan 420008, Russian Federation
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4
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Huang P, Yao L, Chang Q, Sha Y, Jiang G, Zhang S, Li Z. Room-temperature preparation of highly efficient NH 2-MIL-101(Fe) catalyst: The important role of -NH 2 in accelerating Fe(III)/Fe(II) cycling. CHEMOSPHERE 2022; 291:133026. [PMID: 34822869 DOI: 10.1016/j.chemosphere.2021.133026] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/19/2021] [Accepted: 11/20/2021] [Indexed: 06/13/2023]
Abstract
The slow redox rate of Fe(III)/Fe(II) couples is a rate-limiting step for Fenton-like performance of Fe-MOFs. In this study, a series of catalysts (MIL-101) with various p-phthalic acid/2-aminoterephthalic acid (H2BDC/NH2-H2BDC) molar ratios were prepared using a simple and mild chemical method and applied for catalyzed degradation of bisphenol A (BPA). Interestingly, the -NH2 modified MIL-101(Fe) can adjust Fe-Oxo node by increasing the electron density of Fe(III) in the presence of -NH2 group with high electron density, thus forming Fe(II) in situ in MOFs. Meanwhile, the -NH2 groups used as electron-donors can promote electron transfer, resulting in faster Fe(III)→Fe(II) half-reaction and active H2O2 to continuously generate •OH radical. The BPA degradation and rate constant of Fe-BDC-NH2/H2O2 system are 15.4-fold and 86.8-fold higher than that of Fe-BDC/H2O2 system, respectively. The density functional theory (DFT) calculations showed that Fe-BDC-NH2 possesses higher Fermi level energy (-4.88 eV) and lower activation energy barriers (0.32 eV) compared with Fe-BDC. Moreover, Fe-BDC-NH2 showed good reusability and stability. This work offers a highly efficient and stable MOFs-based Fenton-like catalyst to rapidly degrade organic pollutants over a wide pH range for potential applications in wastewater treatment.
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Affiliation(s)
- Peipei Huang
- Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, Hubei, China
| | - Lili Yao
- Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, Hubei, China
| | - Qing Chang
- Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, Hubei, China.
| | - Yunhan Sha
- Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, Hubei, China
| | - Guodong Jiang
- College of Chemistry and Chemical Engineering, Hubei Collaborative Innovation Center for High Efficient Utilization of Solar Energy, Hubei University of Technology, Wuhan, 430074, Hubei, China.
| | - Shenghua Zhang
- Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, Hubei, China
| | - Zhe Li
- Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, Hubei, China
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5
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Hao H, Fan G, Yu J, Cao Y, Liu J, Das S. Adsorption changes of starch on minerals in carbonate-containing iron ore flotation by introducing amino radicals. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Shi Z, Wang Y, Sun Y, Wu X, Xiao T, Dong S, Lan T. Facile One‐Pot Synthesis of Magnetic Targeted Polymers for Drug Delivery and Study on Thermal Decomposition Kinetics. ChemistrySelect 2021. [DOI: 10.1002/slct.202004607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zhen Shi
- College of Materials Science and Engineering Qiqihar University Qiqihar 161006 China
| | - Yazhen Wang
- College of Materials Science and Engineering Qiqihar University Qiqihar 161006 China
- College of Chemistry, Chemical Engineering and Resource Utilization Northeast Forestry University Harbin 150040 China
| | - Yu Sun
- College of Materials Science and Engineering, Heilongjiang Province Key Laboratory of Polymeric Composition Material Qiqihar University Qiqihar 161006 China
| | - Xueying Wu
- College of Materials Science and Engineering, Heilongjiang Province Key Laboratory of Polymeric Composition Material Qiqihar University Qiqihar 161006 China
| | - Tianyuan Xiao
- College of Materials Science and Engineering, Heilongjiang Province Key Laboratory of Polymeric Composition Material Qiqihar University Qiqihar 161006 China
| | - Shaobo Dong
- College of Materials Science and Engineering, Heilongjiang Province Key Laboratory of Polymeric Composition Material Qiqihar University Qiqihar 161006 China
| | - Tianyu Lan
- College of Materials Science and Engineering, Heilongjiang Province Key Laboratory of Polymeric Composition Material Qiqihar University Qiqihar 161006 China
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7
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Bimetal cobalt-Iron based organic frameworks with coordinated sites as synergistic catalyst for fenton catalysis study and antibacterial efficiency. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125683] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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8
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Mentoor K, Twigge L, Niemantsverdriet JWH, Swarts JC, Erasmus E. Silica Nanopowder Supported Frustrated Lewis Pairs for CO 2 Capture and Conversion to Formic Acid. Inorg Chem 2021; 60:55-69. [PMID: 33351611 DOI: 10.1021/acs.inorgchem.0c02012] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Treatment of hydroxylated silica nanopowders S1 and allyl-functionalized silica nanopowders S2 with 3-(diphenylborano)- or 3-bis(pentafluorophenylborano)propyltrimethoxysilane or 2-(diphenylphosphino)- or 2-(dicyclohexylphosphino)ethyltriethoxysilane generates silica nanopowder supported Lewis acids S3 and silica nanopowder supported Lewis bases S4. These surfaces were characterized by 13C, 11B, and 31P cross-polarization magic angle spinning nuclear magnetic resonance (CP MAS NMR), X-ray photoelectron spectroscopy (XPS), and attenuated total reflection Fourier transform infrared (ATR FTIR). When S3 is combined with solution-phase Lewis bases PR3 (R = C6F5, C6H5, mesityl), six associated silica nanopowder supported frustrated Lewis pairs (FLPs) are formed. In another set of six reactions, the interactions between the supported Lewis bases S4 and solution-phase Lewis acids BR3 with R = C6F5, C6H5, mesityl produced six more associated supported FLPs. The capture of CO2 by these FLPs producing FLP-CO2 Lewis pair adducts S5 and S6 were highlighted by ATR FTIR, and it was found that FLP S5e with R = C6H5 on both the supported Lewis acid and solution-phase Lewis base trapped the largest quantities of CO2 on the silica nanopowder supports. Conversion of CO2 to HCOOH was achieved by first activating H2 to generate activated FLP-H2 surfaces S7 and S9. Addition of CO2 then generated HCOOH via the silica nanopowder supported FLP-HCOOH adducts S8 and S10. Qualitative identification of HCOOH generation was achieved by ATR FTIR measurements, and surface 10b with R = C6H5 proved to be the most successful silica nanopowder surface bound FLP in HCOOH generation. In some cases, diborano formates (-BO(CH)OB-) S11 and S12 were also identified as side products during HCOOH formation. Spectroscopic characterization of purposefully synthesized S11 and S12 included 11B and 31P CP MAS NMR.
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Affiliation(s)
- Kgauhelo Mentoor
- Department of Chemistry, University of the Free State, Bloemfontein 9300, South Africa
| | - Linette Twigge
- Department of Chemistry, University of the Free State, Bloemfontein 9300, South Africa
| | | | - Jannie C Swarts
- Department of Chemistry, University of the Free State, Bloemfontein 9300, South Africa
| | - Elizabeth Erasmus
- Department of Chemistry, University of the Free State, Bloemfontein 9300, South Africa
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9
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Cui X, Liu X, Lin C, He M, Ouyang W. Activation of peroxymonosulfate using drinking water treatment residuals modified by hydrothermal treatment for imidacloprid degradation. CHEMOSPHERE 2020; 254:126820. [PMID: 32320832 DOI: 10.1016/j.chemosphere.2020.126820] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 03/31/2020] [Accepted: 04/15/2020] [Indexed: 06/11/2023]
Abstract
In this study, water treatment residuals (WTRs), a safe and valuable by-product containing iron, was used as a precursor for preparing effective activator (HWTRs) of peroxymonosulfate (PMS) for imidacloprid (IMD) degradation by hydrothermal treatment. Several affecting parameters on IMD degradation including PMS concentration, HWTRs dosage, initial pH and water matrix were discussed. The results of degradation experiments demonstrated that within the reaction time of 4 h, 97.64% of IMD could be removed with 0.5 g L-1 HWTRs and 1.5 mM PMS, and the acidic conditions were favorable for IMD degradation. Both sulfate radicals (SO4•-) and hydroxyl radicals (·OH) were generated to attack the target pollutant IMD, and ·OH was the dominating radical in the HWTRs/PMS system, which was confirmed by the results of radicals scavenging experiments, electron spin-resonance spectroscopy (ESR) tests and quantitative analysis. What's more, X-ray photoelectron (XPS) spectroscopy was used to further verify the activation mechanism. Consequently, the activation by Fe(II) on the surface of HWTRs might dominate the reaction was confirmed. In addition, the possible degradation pathways of IMD were proposed on the basis of the degradation intermediates identified by LC-MS. This study offers an innovative idea for modifying raw WTRs to prepare efficient catalysts to activate PMS under relatively mild conditions.
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Affiliation(s)
- Xiaoling Cui
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China
| | - Xitao Liu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China.
| | - Chunye Lin
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China
| | - Mengchang He
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China
| | - Wei Ouyang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China
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10
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Direct production of 2,5-diformylfuran from fructose catalysed by Mo-based composite oxides in static air. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110892] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Guan C, Yin Z, Zhai J, Hu Y, Chen P, Sun W. Surface modification of ilmenite by a novel surfactant dodecyliminodimethylenediphosphoinc acid and its sequent influence on ilmenite floatability. SEP SCI TECHNOL 2019. [DOI: 10.1080/01496395.2019.1577270] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Changping Guan
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, China
| | - Zhigang Yin
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, China
| | - Jihua Zhai
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, China
| | - Yuehua Hu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, China
- Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic, Calcium-Containing Mineral Resources, Central South University, Changsha, Changsha, China
| | - Pan Chen
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, China
- Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic, Calcium-Containing Mineral Resources, Central South University, Changsha, Changsha, China
| | - Wei Sun
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, China
- Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic, Calcium-Containing Mineral Resources, Central South University, Changsha, Changsha, China
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12
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Botha E, Landman M, van Rooyen PH, Erasmus E. Electronic properties of ferrocenyl-terpyridine coordination complexes: An electrochemical and X-ray photoelectron spectroscopic approach. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.04.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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13
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Parrott LK, Erasmus E. Metal Hexacyanometallate Nanoparticles: Spectroscopic Investigation on the Influence of Oxidation State of Metals on Catalytic Activity. Catal Letters 2018. [DOI: 10.1007/s10562-018-2411-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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14
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Zhang S, Zhang C, Li K, Luo J. Investigation of ultra-low friction on steel surfaces with diketone lubricants. RSC Adv 2018; 8:9402-9408. [PMID: 35541854 PMCID: PMC9078690 DOI: 10.1039/c7ra13027a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 02/17/2018] [Indexed: 01/02/2023] Open
Abstract
In this study, the lubricating properties of ethylacetophenone (EAP) solutions with different benzoylacetone (BZA) concentrations on steel surfaces were investigated. The results indicate that with an increase in the BZA concentration in the solution, the friction coefficient decreases, and an ultra-low friction coefficient (μ ≈ 0.005–0.008) is obtained for the solution with 50 wt% BZA concentration. This demonstrates that both the applied normal load and the sliding velocity have significant influence on the realization of ultra-low friction for the 50 wt% BZA solution. Furthermore, the chemical states of the friction surfaces and the components of the 50 wt% BZA solution were detected via X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy (IR), respectively. The analyses reveal that a tribochemical reaction occurs between the BZA molecules and the rubbing surfaces, and the chelate not only can disperse in the solution, but can also form chemical adsorption layers on the rubbing surfaces. In addition, the mechanism of ultra-low friction has been discussed based on the results of these analyses. Both the influence of the hydrodynamic effect and the existence of chemically absorbed films on the steel surfaces lead to a reduction in the friction coefficient. This study reveals that diketone is a promising lubricant for ultralow friction and has great potential in industrial applications. An ultralow friction coefficient is obtained using an EAP solution with a 50 wt% BZA concentration due to the formation of absorbed films.![]()
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Affiliation(s)
- Shumin Zhang
- State Key Laboratory of Tribology
- Tsinghua University
- Beijing
- China
| | - Chenhui Zhang
- State Key Laboratory of Tribology
- Tsinghua University
- Beijing
- China
| | - Ke Li
- Intelligent Transport Systems Research Center
- Wuhan University of Technology
- Wuhan
- China
- Reliability Engineering Institute
| | - Jianbin Luo
- State Key Laboratory of Tribology
- Tsinghua University
- Beijing
- China
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15
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Zhao X, Jin Z, Zhang B, Zhai X, Liu S, Sun X, Zhu Q, Hou B. Effect of graphene oxide on anticorrosion performance of polyelectrolyte multilayer for 2A12 aluminum alloy substrates. RSC Adv 2017. [DOI: 10.1039/c7ra04458e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Corrosion of aluminum alloys (Al alloys) has been a ubiquitous problem, and this seriously restricts its range of applications.
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Affiliation(s)
- Xia Zhao
- Key Laboratory of Marine Environmental Corrosion and Bio-fouling
- Institute of Oceanology
- Chinese Academy of Sciences
- Qingdao 266071
- China
| | - Zuquan Jin
- School of Civil Engineering
- Qingdao Technological University
- Qingdao 266033
- China
| | - Binbin Zhang
- Key Laboratory of Marine Environmental Corrosion and Bio-fouling
- Institute of Oceanology
- Chinese Academy of Sciences
- Qingdao 266071
- China
| | - Xiaofan Zhai
- Key Laboratory of Marine Environmental Corrosion and Bio-fouling
- Institute of Oceanology
- Chinese Academy of Sciences
- Qingdao 266071
- China
| | - Shuan Liu
- Key Laboratory of Marine Materials and Related Ningbo Technologies
- Institute of Materials Technologies and Engineering
- Chinese Academy of Sciences
- Ningbo 315201
- China
| | - Xiaolin Sun
- Key Laboratory of Marine Environmental Corrosion and Bio-fouling
- Institute of Oceanology
- Chinese Academy of Sciences
- Qingdao 266071
- China
| | - Qingjun Zhu
- Key Laboratory of Marine Environmental Corrosion and Bio-fouling
- Institute of Oceanology
- Chinese Academy of Sciences
- Qingdao 266071
- China
| | - Baorong Hou
- Key Laboratory of Marine Environmental Corrosion and Bio-fouling
- Institute of Oceanology
- Chinese Academy of Sciences
- Qingdao 266071
- China
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16
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Zhang K, Deng Y, Yang Y, Liao Y, Wang B, Gong B, Yang W. Effect of lanthanum doping on the far-infrared emission property of vanadium–titanium slag ceramic. RSC Adv 2017. [DOI: 10.1039/c6ra27935j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In the present study, a series of far-infrared ceramics were successfully synthesized using vanadium–titanium slag solid waste and some ordinary minerals as main raw materials with lanthanum (La) as an additive.
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Affiliation(s)
- Kewei Zhang
- School of Materials Science and Engineering
- School of Chemical Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Yi Deng
- School of Materials Science and Engineering
- School of Chemical Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Yuanyi Yang
- Department of Materials Engineering
- Sichuan College of Architectural Technology
- Deyang 618000
- China
| | - Yongkang Liao
- Sichuan Baita Xinlianxing Ceramic Co., Ltd
- Neijiang 642450
- China
| | - Bozhi Wang
- College of Architecture and Environment
- Sichuan University
- Chengdu 610065
- China
| | - Bing Gong
- School of Materials Science and Engineering
- School of Chemical Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Weizhong Yang
- School of Materials Science and Engineering
- School of Chemical Engineering
- Sichuan University
- Chengdu 610065
- China
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17
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Gostynski R, Conradie J, Erasmus E. Significance of the electron-density of molecular fragments on the properties of manganese(iii) β-diketonato complexes: an XPS and DFT study. RSC Adv 2017. [DOI: 10.1039/c7ra04921h] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The group electronegativity of the R-groups of the ligand influences the XPS binding energies and the amount of charge transferred in the Mn 2p3/2 photoelectron lines. DFT studies illustrated different Jahn–Teller elongation bond stretch isomers.
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Affiliation(s)
- Roxanne Gostynski
- Department of Chemistry
- University of the Free State
- Bloemfontein
- South Africa
| | - Jeanet Conradie
- Department of Chemistry
- University of the Free State
- Bloemfontein
- South Africa
| | - Elizabeth Erasmus
- Department of Chemistry
- University of the Free State
- Bloemfontein
- South Africa
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18
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Abstract
Mesoporous magnetic iron oxide composites (MMIOCs) were successfully prepared by one-step evaporation induced self-assembly using an organic ferrocene surfactant, and innovatively studied as a potential alternative to Co3O4 for persulfate activation to generate radicals.
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Affiliation(s)
- Huanling Xie
- The School of Chemistry and Chemical Engineering
- Chongqing University of Technology
- Chongqing
- China
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19
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Properties of Manganese(III) Ferrocenyl-β-Diketonato Complexes Revealed by Charge Transfer and Multiplet Splitting in the Mn 2p and Fe 2p X-Ray Photoelectron Envelopes. Molecules 2016; 21:molecules21111427. [PMID: 27792197 PMCID: PMC6272950 DOI: 10.3390/molecules21111427] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 10/14/2016] [Accepted: 10/19/2016] [Indexed: 11/16/2022] Open
Abstract
A series of ferrocenyl-functionalized β-diketonato manganese(III) complexes, [Mn(FcCOCHCOR)3] with R = CF3, CH3, Ph (phenyl) and Fc (ferrocenyl) was subjected to a systematic XPS study of the Mn 2p3/2 and Fe 2p3/2 core-level photoelectron lines and their satellite structures. A charge-transfer process from the β-diketonato ligand to the Mn(III) metal center is responsible for the prominent shake-up satellite peaks of the Mn 2p photoelectron lines and the shake-down satellite peaks of the Fe 2p photoelectron lines. Multiplet splitting simulations of the photoelectron lines of the Mn(III) center of [Mn(FcCOCHCOR)3] resemble the calculated Mn 2p3/2 envelope of Mn3+ ions well, indicating the Mn(III) centers are in the high spin state. XPS spectra of complexes with unsymmetrical β-diketonato ligands (i.e., R not Fc) were described with two sets of multiplet splitting peaks representing fac and the more stable mer isomers respectively. Stronger electron-donating ligands stabilize fac more than mer isomers. The sum of group electronegativities, ΣχR, of the β-diketonato pendant side groups influences the binding energies of the multiplet splitting and charge transfer peaks in both Mn and Fe 2p3/2 photoelectron lines, the ratio of satellite to main peak intensities, and the degree of covalence of the Mn–O bond.
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