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Melin TRL, Harell P, Ali B, Loganathan N, Wilson AK. Thermochemistry of per- and polyfluoroalkyl substances. J Comput Chem 2023; 44:570-580. [PMID: 36334029 PMCID: PMC10098614 DOI: 10.1002/jcc.27023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 09/08/2022] [Accepted: 09/30/2022] [Indexed: 11/06/2022]
Abstract
The determination of gas phase thermochemical properties of per- and polyfluoroalkyl substances (PFAS) is central to understanding the long-range transport behavior of PFAS in the atmosphere. Prior gas-phase studies have reported the properties of perfluorinated sulfonic acid (PFOS) and perfluorinated octanoic acid (PFOA). Here, this study reports the gas phase enthalpies of formation of short- and long-chain PFAS and their precursor molecules determined using density functional theory (DFT) and ab initio approaches. Two density functionals, two ab initio methods and an empirical method were used to compute enthalpies of formation with the total atomization approach and an isogyric reaction. The performance of the computational methods employed in this work were validated against the experimental enthalpies of linear alkanoic acids and perfluoroalkanes. The gas-phase determinations will be useful for future studies of PFAS in the atmosphere, and the methodological choices will be helpful in the study of other PFAS.
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Affiliation(s)
- Timothé R L Melin
- Department of Chemistry, Michigan State University, East Lansing, Michigan, USA
| | - Preston Harell
- Department of Chemistry, Michigan State University, East Lansing, Michigan, USA
| | - Betoul Ali
- Department of Chemistry, Michigan State University, East Lansing, Michigan, USA
| | | | - Angela K Wilson
- Department of Chemistry, Michigan State University, East Lansing, Michigan, USA
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2
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Shukla PM, Bhattacharya A, Pratap A, Pradhan A, Sinha P, Soni T, Maji B. HFIP-promoted halo-carbocyclizations of N- and O-tethered arene–alkene substrates to access all halo (X = Br, I, Cl)-functionalized tetrahydroquinoline and chroman cores. Org Biomol Chem 2022; 20:8136-8144. [DOI: 10.1039/d2ob01597h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Herein, a HFIP-promoted mild and efficient method for the synthesis of all halo (X = Br, I, Cl)-functionalized tetrahydroquinoline and chroman building blocks is disclosed.
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Affiliation(s)
- Pushpendra Mani Shukla
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Aditya Bhattacharya
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Aniruddh Pratap
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Akash Pradhan
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Puspita Sinha
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Tanishk Soni
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Biswajit Maji
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
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3
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Kolb S, Petzold M, Brandt F, Jones PG, Jacob CR, Werz DB. Electrocatalytic Activation of Donor-Acceptor Cyclopropanes and Cyclobutanes: An Alternative C(sp 3 )-C(sp 3 ) Cleavage Mode. Angew Chem Int Ed Engl 2021; 60:15928-15934. [PMID: 33890714 PMCID: PMC8362004 DOI: 10.1002/anie.202101477] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 04/21/2021] [Indexed: 12/03/2022]
Abstract
We describe the first electrochemical activation of D-A cyclopropanes and D-A cyclobutanes leading after C(sp3 )-C(sp3 ) cleavage to the formation of highly reactive radical cations. This concept is utilized to formally insert molecular oxygen after direct or DDQ-assisted anodic oxidation of the strained carbocycles, delivering β- and γ-hydroxy ketones and 1,2-dioxanes electrocatalytically. Furthermore, insights into the mechanism of the oxidative process, obtained experimentally and by additional quantum-chemical calculations are presented. The synthetic potential of the reaction products is demonstrated by diverse derivatizations.
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Affiliation(s)
- Simon Kolb
- Technische Universität BraunschweigInstitute of Organic ChemistryHagenring 3038106BraunschweigGermany
| | - Martin Petzold
- Technische Universität BraunschweigInstitute of Organic ChemistryHagenring 3038106BraunschweigGermany
| | - Felix Brandt
- Technische Universität BraunschweigInstitute of Physical and Theoretical ChemistryGaußstraße 1738106BraunschweigGermany
| | - Peter G. Jones
- Technische Universität BraunschweigInstitute of Inorganic and Analytical ChemistryHagenring 3038106BraunschweigGermany
| | - Christoph R. Jacob
- Technische Universität BraunschweigInstitute of Physical and Theoretical ChemistryGaußstraße 1738106BraunschweigGermany
| | - Daniel B. Werz
- Technische Universität BraunschweigInstitute of Organic ChemistryHagenring 3038106BraunschweigGermany
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4
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Kolb S, Petzold M, Brandt F, Jones PG, Jacob CR, Werz DB. Electrocatalytic Activation of Donor–Acceptor Cyclopropanes and Cyclobutanes: An Alternative C(sp
3
)−C(sp
3
) Cleavage Mode. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101477] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Simon Kolb
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Martin Petzold
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Felix Brandt
- Technische Universität Braunschweig Institute of Physical and Theoretical Chemistry Gaußstraße 17 38106 Braunschweig Germany
| | - Peter G. Jones
- Technische Universität Braunschweig Institute of Inorganic and Analytical Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Christoph R. Jacob
- Technische Universität Braunschweig Institute of Physical and Theoretical Chemistry Gaußstraße 17 38106 Braunschweig Germany
| | - Daniel B. Werz
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
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5
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de Mello R, Rodrigo MA, Motheo AJ. Electro-oxidation of tetracycline in methanol media on DSA®-Cl 2. CHEMOSPHERE 2021; 273:129696. [PMID: 33524759 DOI: 10.1016/j.chemosphere.2021.129696] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/16/2021] [Accepted: 01/17/2021] [Indexed: 06/12/2023]
Abstract
The electro-oxidation of tetracycline (TeC) in methanol medium containing chloride or sulfate ions was evaluated using a DSA®-Cl2 in a flow reactor and compared with BDD. The results show that after 30 min of electrolysis no TeC is detected by liquid chromatography when chloride is used as supporting electrolyte. On the other hand, after 90 min of electrolysis using a BDD anode only 61% of TeC was removed from solutions with chloride, but in the presence of sulfate the removal reaches 94%. This evidences that the oxidizing species generated during electrochemical oxidation control the process and the mechanism of degradation of the TeC. Besides that, it was possible to infer that only a small amount of methanol might convert to formaldehyde or formic acid, although they were not detected according to the nil changes in the FTIR spectra or in the HPLC chromatograms recorded.
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Affiliation(s)
- Rodrigo de Mello
- São Carlos Institute of Chemistry, University of São Paulo, P.O. Box 780, CEP 13560-970, São Carlos, SP, Brazil
| | - Manuel A Rodrigo
- Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Universidad de Castilla - La Mancha, Campus Universitario S/n, 13071, Ciudad Real, Spain
| | - Artur J Motheo
- São Carlos Institute of Chemistry, University of São Paulo, P.O. Box 780, CEP 13560-970, São Carlos, SP, Brazil.
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Bhattacharya T, Ghosh A, Maiti D. Hexafluoroisopropanol: the magical solvent for Pd-catalyzed C-H activation. Chem Sci 2021; 12:3857-3870. [PMID: 34163654 PMCID: PMC8179444 DOI: 10.1039/d0sc06937j] [Citation(s) in RCA: 116] [Impact Index Per Article: 38.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 01/19/2021] [Indexed: 12/28/2022] Open
Abstract
Among numerous solvents available for chemical transformations, 1,1,1,3,3,3-hexafluoro-2-propanol (popularly known as HFIP) has attracted enough attention of the scientific community in recent years. Several unique features of HFIP compared to its non-fluoro analogue isopropanol have helped this solvent to make a difference in various subdomains of organic chemistry. One such area is transition metal-catalyzed C-H bond functionalization reactions. While, on one side, HFIP is emerging as a green and sustainable deep eutectic solvent (DES), on the other side, a major proportion of Pd-catalyzed C-H functionalization is heavily relying on this solvent. In particular, for distal aromatic C-H functionalizations, the exceptional impact of HFIP to elevate the yield and selectivity has made this solvent irreplaceable. Recent research studies have also highlighted the H-bond-donating ability of HFIP to enhance the chiral induction in Pd-catalyzed atroposelective C-H activation. This perspective aims to portray different shades of HFIP as a magical solvent in Pd-catalyzed C-H functionalization reactions.
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Affiliation(s)
- Trisha Bhattacharya
- Department of Chemistry, Indian Institute of Technology Bombay Powai Mumbai Maharashtra 400076 India
| | - Animesh Ghosh
- Department of Chemistry, Indian Institute of Technology Bombay Powai Mumbai Maharashtra 400076 India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay Powai Mumbai Maharashtra 400076 India
- Tokyo Tech World Research Hub Initiative (WRHI), Laboratory for Chemistry and Life Science, Tokyo Institute of Technology Tokyo 152-8550 Japan
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7
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Seidler J, Strugatchi J, Gärtner T, Waldvogel SR. Does electrifying organic synthesis pay off? The energy efficiency of electro-organic conversions. ACTA ACUST UNITED AC 2021. [DOI: 10.1557/mre.2020.42] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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8
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Abstract
HFIP has developed immense importance in the C–H functionalization methodology. Both the reactivity and selectivity have been vastly improved using HFIP whose H-bonding to the substrate facilitates and accelerates C–H activation. This review summarizes the chronological development of the evolution of HFIP in C–H activation along with important mechanistic details.
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10
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Buijnsters JG, Tsigkourakos M, Hantschel T, Gomes FOV, Nuytten T, Favia P, Bender H, Arstila K, Celis JP, Vandervorst W. Effect of Boron Doping on the Wear Behavior of the Growth and Nucleation Surfaces of Micro- and Nanocrystalline Diamond Films. ACS APPLIED MATERIALS & INTERFACES 2016; 8:26381-26391. [PMID: 27595278 DOI: 10.1021/acsami.6b08083] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
B-doped diamond has become the ultimate material for applications in the field of microelectromechanical systems (MEMS), which require both highly wear resistant and electrically conductive diamond films and microstructures. Despite the extensive research of the tribological properties of undoped diamond, to date there is very limited knowledge of the wear properties of highly B-doped diamond. Therefore, in this work a comprehensive investigation of the wear behavior of highly B-doped diamond is presented. Reciprocating sliding tests are performed on micro- and nanocrystalline diamond (MCD, NCD) films with varying B-doping levels and thicknesses. We demonstrate a linear dependency of the wear rate of the different diamond films with the B-doping level. Specifically, the wear rate increases by a factor of 3 between NCD films with 0.6 and 2.8 at. % B-doping levels. This increase in the wear rate can be linked to a 50% decrease in both hardness and elastic modulus of the highly B-doped NCD films, as determined by nanoindentation measurements. Moreover, we show that fine-grained diamond films are more prone to wear. Particularly, NCD films with a 3× smaller grain size but similar B-doping levels exhibit a double wear rate, indicating the crucial role of the grain size on the diamond film wear behavior. On the other hand, MCD films are the most wear-resistant films due to their larger grains and lower B-doping levels. We propose a graphical scheme of the wear behavior which involves planarization and mechanochemically driven amorphization of the surface to describe the wear mechanism of B-doped diamond films. Finally, the wear behavior of the nucleation surface of NCD films is investigated for the first time. In particular, the nucleation surface is shown to be susceptible to higher wear compared to the growth surface due to its higher grain boundary line density.
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Affiliation(s)
- Josephus G Buijnsters
- Department of Precision and Microsystems Engineering, Research Group of Micro and Nano Engineering, Delft University of Technology , Mekelweg 2, 2628 CD Delft, The Netherlands
- Department of Materials Engineering, KU Leuven , Kasteelpark Arenberg 44, B-3001 Leuven, Belgium
| | - Menelaos Tsigkourakos
- Department of Precision and Microsystems Engineering, Research Group of Micro and Nano Engineering, Delft University of Technology , Mekelweg 2, 2628 CD Delft, The Netherlands
- Imec , Kapeldreef 75, B-3001 Leuven, Belgium
- IKS-Department of Physics, KU Leuven , Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | | | - Francis O V Gomes
- Imec , Kapeldreef 75, B-3001 Leuven, Belgium
- IKS-Department of Physics, KU Leuven , Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | | | - Paola Favia
- Imec , Kapeldreef 75, B-3001 Leuven, Belgium
| | - Hugo Bender
- Imec , Kapeldreef 75, B-3001 Leuven, Belgium
| | - Kai Arstila
- Imec , Kapeldreef 75, B-3001 Leuven, Belgium
- Department of Physics, University of Jyväskylä , P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - Jean-Pierre Celis
- Department of Materials Engineering, KU Leuven , Kasteelpark Arenberg 44, B-3001 Leuven, Belgium
| | - Wilfried Vandervorst
- Imec , Kapeldreef 75, B-3001 Leuven, Belgium
- IKS-Department of Physics, KU Leuven , Celestijnenlaan 200D, B-3001 Leuven, Belgium
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11
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Steter JR, Kossuga MH, Motheo AJ. Mechanistic proposal for the electrochemical and sonoelectrochemical oxidation of thiram on a boron-doped diamond anode. ULTRASONICS SONOCHEMISTRY 2016; 28:21-30. [PMID: 26384879 DOI: 10.1016/j.ultsonch.2015.06.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 06/17/2015] [Accepted: 06/24/2015] [Indexed: 06/05/2023]
Abstract
A comparative study was carried out of sonochemical (SCh), electrochemical (ECh) and sonoelectrochemical (SECh) strategies for the degradation of the fungicide thiram in dilute aqueous solution. The SCh and SECh studies were performed using a sonicator equipped with an 11 mm titanium-alloy probe and operated at 20 kHz with a power intensity of 523 W cm(-2). In the ECh and SECh investigations, galvanostatic electrolyses were implemented using a single compartment electrochemical cell with a boron-doped diamond electrode as anode and applied current densities in the range 10-50 mA cm(-2). For these processes, the decrease in concentration of thiram was monitored by high performance liquid chromatographic (HPLC) analysis and values of current efficiency and energy consumption were determined. The results showed that the rate of degradation of thiram and the amount of energy consumed were directly proportional to the applied current density, while current efficiency was inversely related to current density. The kinetics of thiram degradation followed a pseudo first order model with apparent rate constants in the region of 10(-3)min(-1). Thiram in aqueous solution was subjected to "exhaustive" degradation by ECh and SECh processes for 5h at applied current densities of 35 mA cm(-2) and the intermediates/byproducts so-formed were identified by HPLC-mass spectrometry. Mechanisms of the degradation reactions have been proposed on the basis of the results obtained.
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Affiliation(s)
- Juliana R Steter
- São Carlos Institute of Chemistry, University of São Paulo, Avenida Trabalhador Sancarlense, 400, São Carlos, SP 13566-590, Brazil
| | - Miriam H Kossuga
- São Carlos Institute of Chemistry, University of São Paulo, Avenida Trabalhador Sancarlense, 400, São Carlos, SP 13566-590, Brazil
| | - Artur J Motheo
- São Carlos Institute of Chemistry, University of São Paulo, Avenida Trabalhador Sancarlense, 400, São Carlos, SP 13566-590, Brazil.
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12
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Bondue CJ, Reinsberg P, Abd-El-Latif AA, Baltruschat H. Oxygen reduction and oxygen evolution in DMSO based electrolytes: the role of the electrocatalyst. Phys Chem Chem Phys 2015; 17:25593-25606. [DOI: 10.1039/c5cp04356e] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Electrochemical oxygen reduction to both peroxide and superoxide is an inner sphere reaction in DMSO.
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Affiliation(s)
- C. J. Bondue
- Institut für Physikalische und Theoretische Chemie
- Universität Bonn
- D-53117 Bonn
- Germany
| | - P. Reinsberg
- Institut für Physikalische und Theoretische Chemie
- Universität Bonn
- D-53117 Bonn
- Germany
| | - A. A. Abd-El-Latif
- Institut für Physikalische und Theoretische Chemie
- Universität Bonn
- D-53117 Bonn
- Germany
- National Research Centre
| | - H. Baltruschat
- Institut für Physikalische und Theoretische Chemie
- Universität Bonn
- D-53117 Bonn
- Germany
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13
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Kuznetsova E, Cuesta A, Thomassen M, Sunde S. Identification of the byproducts of the oxygen evolution reaction on Rutile-type oxides under dynamic conditions. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.06.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Ishizuka T, Ohzu S, Kotani H, Shiota Y, Yoshizawa K, Kojima T. Hydrogen atom abstraction reactions independent of C–H bond dissociation energies of organic substrates in water: significance of oxidant–substrate adduct formation. Chem Sci 2014. [DOI: 10.1039/c3sc53002g] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Adduct formation between Ru(iv)–oxo complexes and substrates with hydrogen bonding affords condensed transition states for substrate oxidations in water.
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Affiliation(s)
- Tomoya Ishizuka
- Department of Chemistry
- Graduate School of Pure and Applied Sciences
- University of Tsukuba
- Tsukuba, Japan
| | - Shingo Ohzu
- Department of Chemistry
- Graduate School of Pure and Applied Sciences
- University of Tsukuba
- Tsukuba, Japan
| | - Hiroaki Kotani
- Department of Chemistry
- Graduate School of Pure and Applied Sciences
- University of Tsukuba
- Tsukuba, Japan
| | - Yoshihito Shiota
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Nishi-Ku, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Nishi-Ku, Japan
| | - Takahiko Kojima
- Department of Chemistry
- Graduate School of Pure and Applied Sciences
- University of Tsukuba
- Tsukuba, Japan
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15
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Stefanova A, Ayata S, Erem A, Ernst S, Baltruschat H. Mechanistic studies on boron-doped diamond: Oxidation of small organic molecules. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.05.104] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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