1
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Michelas M, Redjel YK, Daran JC, Benslimane M, Poli R, Fliedel C. Cobalt(II) and cobalt(III) complexes of tripodal tetradentate diamino-bis(phenolate) ligands: Synthesis, characterization, crystal structures and evaluation in radical polymerization processes. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2023.121408] [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]
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2
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Lerner A, Meyerstein D, Blahman A, Saphier M, Yardeni G, Maimon E, Kornweitz H, Zilbermann I. On the reactions of Cu(II/I)ATP complexes with methyl radicals. J Inorg Biochem 2022; 234:111883. [PMID: 35717883 DOI: 10.1016/j.jinorgbio.2022.111883] [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: 04/03/2022] [Revised: 05/12/2022] [Accepted: 05/29/2022] [Indexed: 10/18/2022]
Abstract
The CuI/IIATP react with methyl radicals to form methane and methanol, where CuIATP reacts with •CH3 in a process that is surprisingly slow. The low-rate constant of this process is attributed to the significant rearrangement of the chelating ligand required for the transient's formation. These results were corroborated by DFT calculations of the relevant compounds.
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Affiliation(s)
- Ana Lerner
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel; Chemistry Department, Israel Atomic Energy Commission, Tel Aviv, Israel
| | - Dan Meyerstein
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel; Department of Chemical Sciences, The Radical Research Center and the Schlesinger Family Center for Compact Accelerators, Radiation Sources and Application, Ariel University, Ariel, Israel.
| | - Alex Blahman
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel; Chemistry Department, Israel Atomic Energy Commission, Tel Aviv, Israel
| | - Magal Saphier
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
| | - Guy Yardeni
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
| | - Eric Maimon
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel; Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
| | - Haya Kornweitz
- Department of Chemical Sciences, The Radical Research Center and the Schlesinger Family Center for Compact Accelerators, Radiation Sources and Application, Ariel University, Ariel, Israel
| | - Israel Zilbermann
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel; Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel.
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3
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Insertion of the Liquid Crystal 5CB into Monovacancy Graphene. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27051664. [PMID: 35268764 PMCID: PMC8911687 DOI: 10.3390/molecules27051664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/24/2022] [Accepted: 02/26/2022] [Indexed: 12/04/2022]
Abstract
Interfacial interactions between liquid crystal (LC) and two-dimensional (2D) materials provide a platform to facilitate novel optical and electronic material properties. These interactions are uniquely sensitive to the local energy landscape of the atomically thick 2D surface, which can be strongly influenced by defects that are introduced, either by design or as a byproduct of fabrication processes. Herein, we present density functional theory (DFT) calculations of the LC mesogen 4-cyan-4′-pentylbiphenyl (5CB) on graphene in the presence of a monovacancy (MV-G). We find that the monovacancy strengthens the binding of 5CB in the planar alignment and that the structure is lower in energy than the corresponding homeotropic structure. However, if the molecule is able to approach the monovacancy homeotropically, 5CB undergoes a chemical reaction, releasing 4.5 eV in the process. This reaction follows a step-by-step process gradually adding bonds, inserting the 5CB cyano group into MV-G. We conclude that this irreversible insertion reaction is likely spontaneous, potentially providing a new avenue for controlling both LC behavior and graphene properties.
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4
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Tripodal Heptadentate Amine Ligands with Different Nitrogen Substituents for SARA- and Photo-ATRP. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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5
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Avraham E, Meyerstein D, Lerner A, Yardeni G, Pevzner S, Zilbermann I, Moisy P, Maimon E, Popivker I. Reactions of methyl, hydroxyl and peroxyl radicals with the DOTA chelating agent used in medical imaging. Free Radic Biol Med 2022; 180:134-142. [PMID: 34973364 DOI: 10.1016/j.freeradbiomed.2021.12.313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 12/13/2021] [Accepted: 12/27/2021] [Indexed: 12/30/2022]
Abstract
The mechanism of reaction of DOTA (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) with ·CH3, CH3O2· and ·OH radicals were studied. The radicals were formed in situ radiolytically. The methyl radicals react orders of magnitude slower with DOTA and with MIII(DOTA)- than the hydroxyl radicals. The various final products were identified and mechanisms for their formation are proposed. CH3O2· radicals do not react, or react too slowly to be observed, with DOTA and with MIII(DOTA)- as long as the central cation is not oxidized by the peroxyl radical. The results imply that synthesis of the MIII(DOTA)-(MIII = radioisotope) complexes in a water-organic solvent (ethanol or 2-propanol or acetonitrile) mixture is not only kinetically desired but the so formed complex also decreases the radiolytic decomposition of DOTA.
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Affiliation(s)
- Elad Avraham
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Dan Meyerstein
- Department of Chemical Sciences, The Radical Research Center and the Schlesinger Family, Center for Compact Accelerators, Radiation Sources and Application, Ariel University, Ariel, Israel; Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Ana Lerner
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel; Israel Atomic Energy Commission, Tel Aviv, Israel
| | - Guy Yardeni
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
| | - Svetlana Pevzner
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
| | - Israel Zilbermann
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel; Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
| | - Philippe Moisy
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, France
| | - Eric Maimon
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel; Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
| | - Inna Popivker
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel.
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6
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Gonzálvez MA, Harmer JR, Bernhardt PV. Mapping the Pathway to Organocopper(II) Complexes Relevant to Atom Transfer Radical Polymerization. Inorg Chem 2021; 60:10648-10655. [PMID: 34185989 DOI: 10.1021/acs.inorgchem.1c01309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The rare organocopper(II) complex [Cu(Me6tren)(CH2CN)]+ (Me6tren = tris(2-(dimethylamino)ethyl)amine) has emerged as an important model of potential byproducts in copper-catalyzed atom transfer radical polymerization. This complex has been generated by controlled potential electrolysis of [Cu(Me6tren)(NCMe)]2+ in the presence of BrCH2CN. Time-resolved UV-vis and continuous wave and pulse electron paramagnetic resonance (EPR) spectra identified [Cu(Me6tren)Br]+ as an intermediate. Hyperfine sublevel correlation and electron nuclear double resonance spectroscopy of samples at different timepoints reveal signals that are assigned to a C-bound cyanomethylate ligand, with distinct 14N and 1H hyperfine coupling constants in comparison with the corresponding N-bound acetonitrile and bromido complexes. The experimental EPR data are supported by density functional theory calculations to understand how the geometries of the species involved produce distinct spectroscopic signatures, and a clear picture of how this unusual organocopper(II) complex is formed has emerged.
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Affiliation(s)
- Miguel A Gonzálvez
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
| | - Jeffrey R Harmer
- Centre for Advanced Imaging, University of Queensland, Brisbane 4072, Australia
| | - Paul V Bernhardt
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
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8
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De Bon F, Abreu CMR, Serra AC, Gennaro A, Coelho JFJ, Isse AA. Catalytic Halogen Exchange in Supplementary Activator and Reducing Agent Atom Transfer Radical Polymerization for the Synthesis of Block Copolymers. Macromol Rapid Commun 2020; 42:e2000532. [PMID: 33289265 DOI: 10.1002/marc.202000532] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 10/24/2020] [Indexed: 11/08/2022]
Abstract
Synthesis of block copolymers (BCPs) by catalytic halogen exchange (cHE) is reported, using supplemental activator and reducing agent Atom Transfer Radical Polymerization (SARA ATRP). The cHE mechanism is based on the use of a small amount of a copper catalyst in the presence of a suitable excess of halide ions, for the synthesis of block copolymers from macroinitiators with monomers of mismatching reactivity. cHE overcomes the problem of inefficient initiation in block copolymerizations in which the second monomer provides dormant species that are more reactive than the initiator. Model macroinitiators with low dispersity are prepared and extended to afford well-defined block copolymers of various compositions. Combined cHE/SARA ATRP is therefore a simple and potent polymerization tool for the copolymerization of a wide range of monomers allowing the production of tailored block copolymers.
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Affiliation(s)
- Francesco De Bon
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, Padova, 35131, Italy
- Centre for Mechanical Engineering, Materials and Processes, Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima, Pólo II, Coimbra, 3030-790, Portugal
| | - Carlos M R Abreu
- Centre for Mechanical Engineering, Materials and Processes, Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima, Pólo II, Coimbra, 3030-790, Portugal
| | - Arménio C Serra
- Centre for Mechanical Engineering, Materials and Processes, Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima, Pólo II, Coimbra, 3030-790, Portugal
| | - Armando Gennaro
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, Padova, 35131, Italy
| | - Jorge F J Coelho
- Centre for Mechanical Engineering, Materials and Processes, Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima, Pólo II, Coimbra, 3030-790, Portugal
| | - Abdirisak A Isse
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, Padova, 35131, Italy
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9
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Yardeni G, Meyerstein D, Mikhailovich-Jivin E, Kats L, Cohen H, Zilbermann I, Maimon E. The reactions of the Cu(II)-nitrilotris(methylenephosphonic acid) complex with alkyl radicals in aqueous solutions. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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10
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Enciso AE, Lorandi F, Mehmood A, Fantin M, Szczepaniak G, Janesko BG, Matyjaszewski K. p
‐Substituted Tris(2‐pyridylmethyl)amines as Ligands for Highly Active ATRP Catalysts: Facile Synthesis and Characterization. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004724] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Alan E. Enciso
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Francesca Lorandi
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Arshad Mehmood
- Department of Chemistry and Biochemistry Texas Christian University 2800 South University Drive Fort Worth TX 76129 USA
| | - Marco Fantin
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Grzegorz Szczepaniak
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Benjamin G. Janesko
- Department of Chemistry and Biochemistry Texas Christian University 2800 South University Drive Fort Worth TX 76129 USA
| | - Krzysztof Matyjaszewski
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
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11
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Enciso AE, Lorandi F, Mehmood A, Fantin M, Szczepaniak G, Janesko BG, Matyjaszewski K. p-Substituted Tris(2-pyridylmethyl)amines as Ligands for Highly Active ATRP Catalysts: Facile Synthesis and Characterization. Angew Chem Int Ed Engl 2020; 59:14910-14920. [PMID: 32416006 DOI: 10.1002/anie.202004724] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/10/2020] [Indexed: 12/28/2022]
Abstract
A facile and efficient two-step synthesis of p-substituted tris(2-pyridylmethyl)amine (TPMA) ligands to form Cu complexes with the highest activity to date in atom transfer radical polymerization (ATRP) is presented. In the divergent synthesis, p-Cl substituents in tris(4-chloro-2-pyridylmethyl)amine (TPMA3Cl ) were replaced in one step and high yield by electron-donating cyclic amines (pyrrolidine (TPMAPYR ), piperidine (TPMAPIP ), and morpholine (TPMAMOR )) by nucleophilic aromatic substitution. The [CuII (TPMANR2 )Br]+ complexes exhibited larger energy gaps between frontier molecular orbitals and >0.2 V more negative reduction potentials than [CuII (TPMA)Br]+ , indicating >3 orders of magnitude higher ATRP activity. [CuI (TPMAPYR )]+ exhibited the highest reported activity for Br-capped acrylate chain ends in DMF, and moderate activity toward C-F bonds at room temperature. ATRP of n-butyl acrylate using only 10-25 part per million loadings of [CuII (TPMANR2 )Br]+ exhibited excellent control.
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Affiliation(s)
- Alan E Enciso
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Francesca Lorandi
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Arshad Mehmood
- Department of Chemistry and Biochemistry, Texas Christian University, 2800 South University Drive, Fort Worth, TX, 76129, USA
| | - Marco Fantin
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Grzegorz Szczepaniak
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Benjamin G Janesko
- Department of Chemistry and Biochemistry, Texas Christian University, 2800 South University Drive, Fort Worth, TX, 76129, USA
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
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12
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Dadashi-Silab S, Lee IH, Anastasaki A, Lorandi F, Narupai B, Dolinski ND, Allegrezza ML, Fantin M, Konkolewicz D, Hawker CJ, Matyjaszewski K. Investigating Temporal Control in Photoinduced Atom Transfer Radical Polymerization. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00888] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Sajjad Dadashi-Silab
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - In-Hwan Lee
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Department of Chemistry, Ajou University, Suwon 16499, Korea
| | - Athina Anastasaki
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Francesca Lorandi
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Benjaporn Narupai
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Neil D. Dolinski
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Michael L. Allegrezza
- Department of Chemistry and Biochemistry, Miami University, 651 E High Street, Oxford, Ohio 45056, United States
| | - Marco Fantin
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Dominik Konkolewicz
- Department of Chemistry and Biochemistry, Miami University, 651 E High Street, Oxford, Ohio 45056, United States
| | - Craig J. Hawker
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
- Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
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13
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Shi H, Xu L, Ren D, Wang L, Guo W, Li SS. Fluorinated alcohol mediated N,N'-dialkylation of amino acid derivatives via cascade [1,5]-hydride transfer/cyclization for concise synthesis of tetrahydroquinazoline. Org Biomol Chem 2020; 18:895-904. [PMID: 31915775 DOI: 10.1039/c9ob02498k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Structurally diverse amino acids and their ester derivatives were conveniently N,N'-dialkylated via a TFE-promoted cascade condensation/[1,5]-hydride transfer/cyclization for straightforward construction of pharmeutically significant tetrahydroquinazolines incorporating various amino acids, which featured broad substrate scope, the use of TFE as a sole solvent, additive-free and mild conditions.
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Affiliation(s)
- Hongjin Shi
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China.
| | - Lubin Xu
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China.
| | - Didi Ren
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China.
| | - Liang Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China. and Shandong Key Laboratory of Biochemical Analysis; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Zhengzhou Rd. #53, Qingdao 266042, P. R. China
| | - Weisi Guo
- Shandong Key Laboratory of Biochemical Analysis; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Zhengzhou Rd. #53, Qingdao 266042, P. R. China
| | - Shuai-Shuai Li
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China. and Shandong Key Laboratory of Biochemical Analysis; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Zhengzhou Rd. #53, Qingdao 266042, P. R. China
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14
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De Bon F, Ribeiro DCM, Abreu CMR, Rebelo RAC, Isse AA, Serra AC, Gennaro A, Matyjaszewski K, Coelho JFJ. Under pressure: electrochemically-mediated atom transfer radical polymerization of vinyl chloride. Polym Chem 2020. [DOI: 10.1039/d0py00995d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Electrochemically mediated ATRP (eATRP) of vinyl chloride (VC), a less activated monomer, was successfully achieved. It is the first report on eATRP of a gaseous monomer under pressure.
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Affiliation(s)
- Francesco De Bon
- University of Coimbra
- Centre for Mechanical Engineering
- Materials and Processes
- Department of Chemical Engineering
- Rua Sílvio Lima-Polo II
| | - Diana C. M. Ribeiro
- University of Coimbra
- Centre for Mechanical Engineering
- Materials and Processes
- Department of Chemical Engineering
- Rua Sílvio Lima-Polo II
| | - Carlos M. R. Abreu
- University of Coimbra
- Centre for Mechanical Engineering
- Materials and Processes
- Department of Chemical Engineering
- Rua Sílvio Lima-Polo II
| | - Rafael A. C. Rebelo
- University of Coimbra
- Centre for Mechanical Engineering
- Materials and Processes
- Department of Chemical Engineering
- Rua Sílvio Lima-Polo II
| | - Abdirisak A. Isse
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| | - Arménio C. Serra
- University of Coimbra
- Centre for Mechanical Engineering
- Materials and Processes
- Department of Chemical Engineering
- Rua Sílvio Lima-Polo II
| | - Armando Gennaro
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| | | | - Jorge F. J. Coelho
- University of Coimbra
- Centre for Mechanical Engineering
- Materials and Processes
- Department of Chemical Engineering
- Rua Sílvio Lima-Polo II
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15
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Guo RL, Zhu XQ, Zhang XL, Wang YQ. Synthesis of difluoromethylselenoesters from aldehydes via a radical process. Chem Commun (Camb) 2020; 56:8976-8979. [DOI: 10.1039/d0cc02912b] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Difluoromethylselenoester compounds are reported for the first time. They can be efficiently synthesized from aldehydes and BnSeCF2H under mild conditions.
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Affiliation(s)
- Rui-Li Guo
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science
- Northwest University
- Xi’an 710069
- People's Republic of China
| | - Xue-Qing Zhu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science
- Northwest University
- Xi’an 710069
- People's Republic of China
| | - Xing-Long Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science
- Northwest University
- Xi’an 710069
- People's Republic of China
| | - Yong-Qiang Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science
- Northwest University
- Xi’an 710069
- People's Republic of China
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16
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Jin XX, Li T, Shi DP, Luo LJ, Su QQ, Xiang J, Xu HB, Leung CF, Zeng MH. Luminescent phosphine copper( i) complexes with various functionalized bipyridine ligands: synthesis, structures, photophysics and computational study. NEW J CHEM 2020. [DOI: 10.1039/c9nj05887g] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A new series of luminescent phosphine copper(i) complexes with cyano- and hydroxyl-substituted 2,2′-bipyridine ligands have been synthesized and structurally characterized. Their luminescent properties have also been investigated in detail.
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Affiliation(s)
- Xin-Xin Jin
- College of Chemistry and Environmental Engineering
- Yangtze University
- Jingzhou 434020
- P. R. China
| | - Tian Li
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry & Chemical Engineering
- Hubei University
- Wuhan 430062
- China
| | - Dong-Po Shi
- College of Chemistry and Environmental Engineering
- Yangtze University
- Jingzhou 434020
- P. R. China
| | - Li-Juan Luo
- College of Chemistry and Environmental Engineering
- Yangtze University
- Jingzhou 434020
- P. R. China
| | - Qian-Qian Su
- College of Chemistry and Environmental Engineering
- Yangtze University
- Jingzhou 434020
- P. R. China
| | - Jing Xiang
- College of Chemistry and Environmental Engineering
- Yangtze University
- Jingzhou 434020
- P. R. China
| | - Hai-Bing Xu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry & Chemical Engineering
- Hubei University
- Wuhan 430062
- China
| | - Chi-Fai Leung
- Department of Science and Environmental Studies
- The Education University of Hong Kong
- Tai Po
- China
| | - Ming-Hua Zeng
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry & Chemical Engineering
- Hubei University
- Wuhan 430062
- China
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17
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Martinez MR, Sobieski J, Lorandi F, Fantin M, Dadashi-Silab S, Xie G, Olszewski M, Pan X, Ribelli TG, Matyjaszewski K. Understanding the Relationship between Catalytic Activity and Termination in photoATRP: Synthesis of Linear and Bottlebrush Polyacrylates. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b02397] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Michael R. Martinez
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Julian Sobieski
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Francesca Lorandi
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Marco Fantin
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Sajjad Dadashi-Silab
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Guojun Xie
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Mateusz Olszewski
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Xiangcheng Pan
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Thomas G. Ribelli
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
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18
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Yardeni G, Meyerstein D, Kats L, Cohen H, Zilbermann I, Maimon E. On the reactions of methyl radicals with nitrilotris(methylenephosphonic-acid) complexes in aqueous solutions. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1698736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Guy Yardeni
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
| | - Dan Meyerstein
- Chemical Sciences Department, The Radical Research Centre and the Schlesinger Family Center for Compact Accelerators, Radiation Sources and Applications, Ariel University, Ariel, Israel
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Lioubov Kats
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Haim Cohen
- Chemical Sciences Department, The Radical Research Centre and the Schlesinger Family Center for Compact Accelerators, Radiation Sources and Applications, Ariel University, Ariel, Israel
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Israel Zilbermann
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Eric Maimon
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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19
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Affiliation(s)
- Francesca Lorandi
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213 United States
| | - Krzysztof Matyjaszewski
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213 United States
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20
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Thevenin L, Fliedel C, Matyjaszewski K, Poli R. Impact of Catalyzed Radical Termination (CRT) and Reductive Radical Termination (RRT) in Metal‐Mediated Radical Polymerization Processes. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900901] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lucas Thevenin
- CNRS LCC (Laboratoire de Chimie de Coordination) Université de Toulouse UPS, INPT 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4 France
| | - Christophe Fliedel
- CNRS LCC (Laboratoire de Chimie de Coordination) Université de Toulouse UPS, INPT 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4 France
| | - Krzysztof Matyjaszewski
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue 15213 Pittsburgh PA United States
| | - Rinaldo Poli
- CNRS LCC (Laboratoire de Chimie de Coordination) Université de Toulouse UPS, INPT 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4 France
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21
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Santos WG, Budkina DS, Santagneli SH, Tarnovsky AN, Zukerman-Schpector J, Ribeiro SJL. Ion-Pair Complexes of Pyrylium and Tetraarylborate as New Host-Guest Dyes: Photoinduced Electron Transfer Promoting Radical Polymerization. J Phys Chem A 2019; 123:7374-7383. [PMID: 31386369 DOI: 10.1021/acs.jpca.9b03581] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Ultrafast transient absorption spectroscopy, NOESY-NMR, and EPR spectroscopy shed light on how π-π stacking interactions combined with electrostatic interactions can be used to form stable ion-pair complexes between pyrylium and tetraarylborate ions in which the interaction of the π-delocalized clouds promotes the observation of new radiative processes and also electron transfer processes excitation using visible light. The results exhibit a striking combination of properties, chemical stability and photophysical and photochemical events, that make these ion-pair complexes as a step toward the realization of chromophore/luminescent materials and also their use as a new monophotoinitiator system in radical polymerization reactions.
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Affiliation(s)
- Willy G Santos
- Institute of Chemistry , São Paulo State University - UNESP , CP 355, Araraquara , SP 14801-970 , Brazil.,Department of Chemistry , Federal University of São Carlos , UFSCar, CP 676, São Carlos , SP 13565-905 , Brazil
| | - Darya S Budkina
- Center for Photochemical Sciences, Department of Chemistry , Bowling Green State University , Bowling Green , Ohio 43403 , United States
| | - Silvia H Santagneli
- Institute of Chemistry , São Paulo State University - UNESP , CP 355, Araraquara , SP 14801-970 , Brazil
| | - Alexander N Tarnovsky
- Center for Photochemical Sciences, Department of Chemistry , Bowling Green State University , Bowling Green , Ohio 43403 , United States
| | - Julio Zukerman-Schpector
- Department of Chemistry , Federal University of São Carlos , UFSCar, CP 676, São Carlos , SP 13565-905 , Brazil
| | - Sidney J L Ribeiro
- Institute of Chemistry , São Paulo State University - UNESP , CP 355, Araraquara , SP 14801-970 , Brazil
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22
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Michieletto A, Lorandi F, De Bon F, Isse AA, Gennaro A. Biocompatible polymers via aqueous electrochemically mediated atom transfer radical polymerization. JOURNAL OF POLYMER SCIENCE 2019. [DOI: 10.1002/pola.29462] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | - Francesca Lorandi
- Department of ChemistryCarnegie Mellon University, 4400 Fifth Avenue Pittsburgh Pennsylvania 15213
| | - Francesco De Bon
- Department of Chemical SciencesUniversity of Padova via Marzolo 1, 35131 Padova Italy
| | - Abdirisak Ahmed Isse
- Department of Chemical SciencesUniversity of Padova via Marzolo 1, 35131 Padova Italy
| | - Armando Gennaro
- Department of Chemical SciencesUniversity of Padova via Marzolo 1, 35131 Padova Italy
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23
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Fantin M, Lorandi F, Ribelli TG, Szczepaniak G, Enciso AE, Fliedel C, Thevenin L, Isse AA, Poli R, Matyjaszewski K. Impact of Organometallic Intermediates on Copper-Catalyzed Atom Transfer Radical Polymerization. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00870] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Marco Fantin
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Francesca Lorandi
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Thomas G. Ribelli
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Grzegorz Szczepaniak
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Alan E. Enciso
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208 United States
| | - Christophe Fliedel
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077 Toulouse Cedex 4, France
| | - Lucas Thevenin
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077 Toulouse Cedex 4, France
| | - Abdirisak A. Isse
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Rinaldo Poli
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077 Toulouse Cedex 4, France
- Institut Universitaire de France, 1 Rue Descartes, 75231 Paris Cedex 05, France
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
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24
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Kim D, Rahaman SMW, Mercado BQ, Poli R, Holland PL. Roles of Iron Complexes in Catalytic Radical Alkene Cross-Coupling: A Computational and Mechanistic Study. J Am Chem Soc 2019; 141:7473-7485. [PMID: 31025567 PMCID: PMC6953484 DOI: 10.1021/jacs.9b02117] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A growing and useful class of alkene coupling reactions involve hydrogen atom transfer (HAT) from a metal-hydride species to an alkene to form a free radical, which is responsible for subsequent bond formation. Here, we use a combination of experimental and computational investigations to map out the mechanistic details of iron-catalyzed reductive alkene cross-coupling, an important representative of the HAT alkene reactions. We are able to explain several observations that were previously mysterious. First, the rate-limiting step in the catalytic cycle is the formation of the reactive Fe-H intermediate, elucidating the importance of the choice of reductant. Second, the success of the catalytic system is attributable to the exceptionally weak (17 kcal/mol) Fe-H bond, which performs irreversible HAT to alkenes in contrast to previous studies on isolable hydride complexes where this addition was reversible. Third, the organic radical intermediates can reversibly form organometallic species, which helps to protect the free radicals from side reactions. Fourth, the previously accepted quenching of the postcoupling radical through stepwise electron transfer/proton transfer is not as favorable as alternative mechanisms. We find that there are two feasible pathways. One uses concerted proton-coupled electron transfer (PCET) from an iron(II) ethanol complex, which is facilitated because the O-H bond dissociation free energy is lowered by 30 kcal/mol upon metal binding. In an alternative pathway, an O-bound enolate-iron(III) complex undergoes proton shuttling from an iron-bound alcohol. These kinetic, spectroscopic, and computational studies identify key organometallic species and PCET steps that control selectivity and reactivity in metal-catalyzed HAT alkene coupling, and create a firm basis for elucidation of mechanisms in the growing class of HAT alkene cross-coupling reactions.
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Affiliation(s)
- Dongyoung Kim
- Department of Chemistry, Yale University, New Haven, Connecticut 06511, United States
| | - S. M. Wahidur Rahaman
- LCC-CNRS, Université de Toulouse, INPT, 205 Route de Narbonne, BP 44099, F-31077 Toulouse Cedex 4, France
| | - Brandon Q. Mercado
- Department of Chemistry, Yale University, New Haven, Connecticut 06511, United States
| | - Rinaldo Poli
- LCC-CNRS, Université de Toulouse, INPT, 205 Route de Narbonne, BP 44099, F-31077 Toulouse Cedex 4, France
| | - Patrick L. Holland
- Department of Chemistry, Yale University, New Haven, Connecticut 06511, United States
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