51
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Flinker M, Yin H, Juhl RW, Eikeland EZ, Overgaard J, Nielsen DU, Skrydstrup T. Efficient Water Reduction with sp3
-sp3
Diboron(4) Compounds: Application to Hydrogenations, H-D Exchange Reactions, and Carbonyl Reductions. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201709685] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mathias Flinker
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Hongfei Yin
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - René W. Juhl
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Espen Z. Eikeland
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Jacob Overgaard
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Dennis U. Nielsen
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Troels Skrydstrup
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
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52
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Flinker M, Yin H, Juhl RW, Eikeland EZ, Overgaard J, Nielsen DU, Skrydstrup T. Efficient Water Reduction with sp3
-sp3
Diboron(4) Compounds: Application to Hydrogenations, H-D Exchange Reactions, and Carbonyl Reductions. Angew Chem Int Ed Engl 2017; 56:15910-15915. [DOI: 10.1002/anie.201709685] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 10/24/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Mathias Flinker
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Hongfei Yin
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - René W. Juhl
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Espen Z. Eikeland
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Jacob Overgaard
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Dennis U. Nielsen
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Troels Skrydstrup
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
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53
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Ji L, Friedrich A, Krummenacher I, Eichhorn A, Braunschweig H, Moos M, Hahn S, Geyer FL, Tverskoy O, Han J, Lambert C, Dreuw A, Marder TB, Bunz UHF. Preparation, Properties, and Structures of the Radical Anions and Dianions of Azapentacenes. J Am Chem Soc 2017; 139:15968-15976. [PMID: 28988473 DOI: 10.1021/jacs.7b09460] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A series of diazapentacenes (5,14-diethynyldibenzo[b,i]phenazine, 6,13-diethynylnaphtho[2,3-b]phenazine) and tetraazapentacenes (7,12-diethynylbenzo[g]quinoxalino[2,3-b]quinoxaline, 6,13-diethynylquinoxalino[2,3-b]phenazine) were reduced to their radical anions and dianions, employing either potassium anthracenide or lithium naphthalenide in THF. The anionic species formed were investigated by UV-vis-NIR, fluorescence and EPR spectroscopy, spectroelectrochemistry, and quantum chemical calculations. Single crystal X-ray structures of three of their radical anions and of three of their dianions were obtained. In contrast to the acenes, the anions of the azapentacenes are persistent and, in some cases, even moderately stable toward air, and were characterized.
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Affiliation(s)
- Lei Ji
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Alexandra Friedrich
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Ivo Krummenacher
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Antonius Eichhorn
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Holger Braunschweig
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Michael Moos
- Institut für Organische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Sebastian Hahn
- Organisch-Chemisches Institut and CAM, Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 270 and 225, 69120 Heidelberg, Germany
| | - Florian L Geyer
- Organisch-Chemisches Institut and CAM, Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 270 and 225, 69120 Heidelberg, Germany
| | - Olena Tverskoy
- Organisch-Chemisches Institut and CAM, Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 270 and 225, 69120 Heidelberg, Germany
| | - Jie Han
- Interdisziplinäres Zentrum für Wissenschaftliches Rechnen and Physikalisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Christoph Lambert
- Institut für Organische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Andreas Dreuw
- Interdisziplinäres Zentrum für Wissenschaftliches Rechnen and Physikalisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Todd B Marder
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Uwe H F Bunz
- Organisch-Chemisches Institut and CAM, Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 270 and 225, 69120 Heidelberg, Germany
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54
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Su Y, Li Y, Ganguly R, Kinjo R. Crystalline boron-linked tetraaminoethylene radical cations. Chem Sci 2017; 8:7419-7423. [PMID: 29163893 PMCID: PMC5674142 DOI: 10.1039/c7sc03528d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Accepted: 09/12/2017] [Indexed: 01/13/2023] Open
Abstract
Boron-linked tetraaminoethylene radical cations has been isolated.
Single-electron oxidation of neutral boryl-linked tetraaminoethylene derivatives 4 led to the formation of radical cations 4˙+, which have been isolated and fully characterized. X-ray diffraction analysis, EPR spectroscopy, and computational studies revealed that the unpaired electron is delocalized over the B2N4C2 skeleton and the spin density mainly resides on the carbon and boron atoms.
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Affiliation(s)
- Yuanting Su
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , Nanyang Link 21 , Singapore 637371 .
| | - Yongxin Li
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , Nanyang Link 21 , Singapore 637371 .
| | - Rakesh Ganguly
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , Nanyang Link 21 , Singapore 637371 .
| | - Rei Kinjo
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , Nanyang Link 21 , Singapore 637371 .
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55
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Cao LL, Stephan DW. Homolytic Cleavage Reactions of a Neutral Doubly Base Stabilized Diborane(4). Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00522] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Levy L. Cao
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
| | - Douglas W. Stephan
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
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56
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Yuan N, Wang W, Fang Y, Zuo J, Zhao Y, Tan G, Wang X. Bis(boryl anion)-Substituted Pyrenes: Syntheses, Characterizations, and Crystal Structures. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00368] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ningning Yuan
- State Key Laboratory of Coordination Chemistry,
School of Chemistry and Chemical Engineering, Collaborative Innovation
Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Wenqing Wang
- State Key Laboratory of Coordination Chemistry,
School of Chemistry and Chemical Engineering, Collaborative Innovation
Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Yong Fang
- State Key Laboratory of Coordination Chemistry,
School of Chemistry and Chemical Engineering, Collaborative Innovation
Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Jiacheng Zuo
- State Key Laboratory of Coordination Chemistry,
School of Chemistry and Chemical Engineering, Collaborative Innovation
Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry,
School of Chemistry and Chemical Engineering, Collaborative Innovation
Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Gengwen Tan
- State Key Laboratory of Coordination Chemistry,
School of Chemistry and Chemical Engineering, Collaborative Innovation
Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Xinping Wang
- State Key Laboratory of Coordination Chemistry,
School of Chemistry and Chemical Engineering, Collaborative Innovation
Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People’s Republic of China
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57
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Kaese T, Budy H, Bolte M, Lerner HW, Wagner M. Deprotonation of a Seemingly Hydridic Diborane(6) To Build a B−B Bond. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702393] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Thomas Kaese
- Institut für Anorganische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Strasse 7 60438 Frankfurt am Main Germany
| | - Hendrik Budy
- Institut für Anorganische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Strasse 7 60438 Frankfurt am Main Germany
| | - Michael Bolte
- Institut für Anorganische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Strasse 7 60438 Frankfurt am Main Germany
| | - Hans-Wolfram Lerner
- Institut für Anorganische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Strasse 7 60438 Frankfurt am Main Germany
| | - Matthias Wagner
- Institut für Anorganische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Strasse 7 60438 Frankfurt am Main Germany
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58
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Kaese T, Budy H, Bolte M, Lerner HW, Wagner M. Deprotonation of a Seemingly Hydridic Diborane(6) To Build a B−B Bond. Angew Chem Int Ed Engl 2017; 56:7546-7550. [DOI: 10.1002/anie.201702393] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Thomas Kaese
- Institut für Anorganische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Strasse 7 60438 Frankfurt am Main Germany
| | - Hendrik Budy
- Institut für Anorganische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Strasse 7 60438 Frankfurt am Main Germany
| | - Michael Bolte
- Institut für Anorganische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Strasse 7 60438 Frankfurt am Main Germany
| | - Hans-Wolfram Lerner
- Institut für Anorganische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Strasse 7 60438 Frankfurt am Main Germany
| | - Matthias Wagner
- Institut für Anorganische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Strasse 7 60438 Frankfurt am Main Germany
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59
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One-Electron Bonds in Frustrated Lewis Pair TPB Ligands: Boron Behaving as a Lewis Base. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701161] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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60
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Kusevska E, Montero-Campillo MM, Mó O, Yáñez M. One-Electron Bonds in Frustrated Lewis Pair TPB Ligands: Boron Behaving as a Lewis Base. Angew Chem Int Ed Engl 2017; 56:6788-6792. [DOI: 10.1002/anie.201701161] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 03/02/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Elena Kusevska
- Departamento de Química; Facultad de Ciencias; Módulo 13.; Universidad Autónoma de Madrid; Campus de Excelencia UAM-CSIC; Cantoblanco 28049 Madrid Spain
| | - M. Merced Montero-Campillo
- Departamento de Química; Facultad de Ciencias; Módulo 13.; Universidad Autónoma de Madrid; Campus de Excelencia UAM-CSIC; Cantoblanco 28049 Madrid Spain
| | - Otilia Mó
- Departamento de Química; Facultad de Ciencias; Módulo 13.; Universidad Autónoma de Madrid; Campus de Excelencia UAM-CSIC; Cantoblanco 28049 Madrid Spain
| | - Manuel Yáñez
- Departamento de Química; Facultad de Ciencias; Módulo 13.; Universidad Autónoma de Madrid; Campus de Excelencia UAM-CSIC; Cantoblanco 28049 Madrid Spain
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61
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Wang L, Fang Y, Mao H, Qu Y, Zuo J, Zhang Z, Tan G, Wang X. An Isolable Diboron-Centered Diradical with a Triplet Ground State. Chemistry 2017; 23:6930-6936. [DOI: 10.1002/chem.201701308] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Lei Wang
- State Key Laboratory of Coordination Chemistry; School of Chemistry and Chemical Engineering; Collaborative Innovation Center of Advanced Microstructures; Nanjing University; Nanjing 210093 P. R. China
| | - Yong Fang
- State Key Laboratory of Coordination Chemistry; School of Chemistry and Chemical Engineering; Collaborative Innovation Center of Advanced Microstructures; Nanjing University; Nanjing 210093 P. R. China
| | - Haochuan Mao
- State Key Laboratory of Coordination Chemistry; School of Chemistry and Chemical Engineering; Collaborative Innovation Center of Advanced Microstructures; Nanjing University; Nanjing 210093 P. R. China
| | - Yi Qu
- State Key Laboratory of Coordination Chemistry; School of Chemistry and Chemical Engineering; Collaborative Innovation Center of Advanced Microstructures; Nanjing University; Nanjing 210093 P. R. China
| | - Jiacheng Zuo
- State Key Laboratory of Coordination Chemistry; School of Chemistry and Chemical Engineering; Collaborative Innovation Center of Advanced Microstructures; Nanjing University; Nanjing 210093 P. R. China
| | - Zaichao Zhang
- School of Chemistry and Chemical Engineering; Huaiyin Normal University; Huai'an 223300 P. R. China
| | - Gengwen Tan
- State Key Laboratory of Coordination Chemistry; School of Chemistry and Chemical Engineering; Collaborative Innovation Center of Advanced Microstructures; Nanjing University; Nanjing 210093 P. R. China
| | - Xinping Wang
- State Key Laboratory of Coordination Chemistry; School of Chemistry and Chemical Engineering; Collaborative Innovation Center of Advanced Microstructures; Nanjing University; Nanjing 210093 P. R. China
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62
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Schickedanz K, Radtke J, Bolte M, Lerner HW, Wagner M. Facile Route to Quadruply Annulated Borepins. J Am Chem Soc 2017; 139:2842-2851. [PMID: 28125773 DOI: 10.1021/jacs.7b00268] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A two-step synthesis sequence furnishes quadruply annulated borepins in high yields. The first step involves a nucleophilic substitution reaction between aryl-BF3K salts (aryl = mesityl, phenyl) and lithiated bromonapthalene derivatives LiNaphBr,R (HNaphBr,R = 8-bromonaphthalene (a), 5-bromoacenaphthene (b), 5-bromoacenaphthylene (c)). In the second step, the resulting heteroleptic triarylboranes aryl-B(NaphBr,R)2 (3a-c) are subjected to an intramolecular Ni-mediated Yamamoto reaction to close the seven-membered rings and create the borepins 4a-c. Only in the case of 3b is the Yamamoto reaction accompanied by a C-H activation reaction furnishing the 7-hydro-7-borabenzo[de]anthracene derivative 5. The product ratio 4b/5 can be influenced by control of the local Ni(0) concentration. The borepins 4a-c are benchtop stable and highly soluble even in hexane. Compounds 4a-c undergo reversible one-electron reduction; 4c is also able to accept a second electron in a reversible manner and already at moderate potential values (E1/2 = -1.49 V and -1.84 V (vs FcH/FcH+)). 4a, 4b, and 5 show photoluminescence in the blue-green region of the spectrum, while 4c is nonfluorescent, which is likely attributable to an intramolecular charge-transfer transition.
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Affiliation(s)
- Kai Schickedanz
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt , Max-von-Laue-Strasse 7, D-60438 Frankfurt (Main), Germany
| | - Julian Radtke
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt , Max-von-Laue-Strasse 7, D-60438 Frankfurt (Main), Germany
| | - Michael Bolte
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt , Max-von-Laue-Strasse 7, D-60438 Frankfurt (Main), Germany
| | - Hans-Wolfram Lerner
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt , Max-von-Laue-Strasse 7, D-60438 Frankfurt (Main), Germany
| | - Matthias Wagner
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt , Max-von-Laue-Strasse 7, D-60438 Frankfurt (Main), Germany
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63
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Grandl M, Rudolf B, Sun Y, Bechtel DF, Pierik AJ, Pammer F. Intramolecular N→B Coordination as a Stabilizing Scaffold for π-Conjugated Radical Anions with Tunable Redox Potentials. Organometallics 2017. [DOI: 10.1021/acs.organomet.6b00916] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Markus Grandl
- Institute
of Organic Chemistry II and Advanced Materials, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Benjamin Rudolf
- Institute
of Organic Chemistry II and Advanced Materials, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Yu Sun
- Fachbereich
Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse
54, 67663 Kaiserslautern, Germany
| | - Dominique F. Bechtel
- Fachbereich
Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse
54, 67663 Kaiserslautern, Germany
| | - Antonio J. Pierik
- Fachbereich
Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse
54, 67663 Kaiserslautern, Germany
| | - Frank Pammer
- Institute
of Organic Chemistry II and Advanced Materials, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
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64
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Ji L, Griesbeck S, Marder TB. Recent developments in and perspectives on three-coordinate boron materials: a bright future. Chem Sci 2017; 8:846-863. [PMID: 28572897 PMCID: PMC5452272 DOI: 10.1039/c6sc04245g] [Citation(s) in RCA: 437] [Impact Index Per Article: 62.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 11/08/2016] [Indexed: 12/12/2022] Open
Abstract
The empty p z -orbital of a three-coordinate organoboron compound leads to its electron-deficient properties, which make it an excellent π-acceptor in conjugated organic chromophores. The empty p-orbital in such Lewis acids can be attacked by nucleophiles, so bulky groups are often employed to provide air-stable materials. However, many of these can still bind fluoride and cyanide anions leading to applications as anion-selective sensors. One electron reduction generates radical anions. The π-acceptor strength can be easily tuned by varying the organic substituents. Many of these compounds show strong two-photon absorption (TPA) and two-photon excited fluorescence (TPEF) behaviour, which can be applied for e.g. biological imaging. Furthermore, these chromophores can be used as emitters and electron transporters in OLEDs, and examples have recently been found to exhibit efficient thermally activated delayed fluorescence (TADF). The three-coordinate organoboron unit can also be incorporated into polycyclic aromatic hydrocarbons. Such boron-doped compounds exhibit very interesting properties, distinct from their all-carbon analogues. Significant developments have been made in all of these areas in recent years and new applications are rapidly emerging for this class of boron compounds.
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Affiliation(s)
- Lei Ji
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Stefanie Griesbeck
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Todd B Marder
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
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65
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Yu L, Li Y, Wang X, Wang X, Zhou P, Jiang S, Pan X. Consecutive reduction, radical-cyclization, and oxidative-dehydrogenation reaction of ortho-substituted diboryl compounds. Chem Commun (Camb) 2017; 53:9737-9740. [DOI: 10.1039/c7cc05689c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An elegant synthetic route to a ladder-type di-borate compound 2a was reported based on the reduction, radical-cyclization, and oxidative-dehydrogenation reaction of 1.
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Affiliation(s)
- Lirong Yu
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Yanglizhi Li
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Xi Wang
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Xingyong Wang
- School of Chemistry
- University of Wollongong
- Wollongong
- Australia
| | - Panpan Zhou
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Shangda Jiang
- National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Perking University
- Beijing 100871
| | - Xiaobo Pan
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
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66
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Silva Valverde MF, Schweyen P, Gisinger D, Bannenberg T, Freytag M, Kleeberg C, Tamm M. Durch N-heterocyclische Carbene stabilisierte Borylradikale. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201610903] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Miguel F. Silva Valverde
- Institut für Anorganische und Analytische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Deutschland
| | - Peter Schweyen
- Institut für Anorganische und Analytische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Deutschland
| | - Daria Gisinger
- Institut für Anorganische und Analytische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Deutschland
| | - Thomas Bannenberg
- Institut für Anorganische und Analytische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Deutschland
| | - Matthias Freytag
- Institut für Anorganische und Analytische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Deutschland
| | - Christian Kleeberg
- Institut für Anorganische und Analytische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Deutschland
| | - Matthias Tamm
- Institut für Anorganische und Analytische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Deutschland
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67
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Silva Valverde MF, Schweyen P, Gisinger D, Bannenberg T, Freytag M, Kleeberg C, Tamm M. N-Heterocyclic Carbene Stabilized Boryl Radicals. Angew Chem Int Ed Engl 2016; 56:1135-1140. [DOI: 10.1002/anie.201610903] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Miguel F. Silva Valverde
- Institut für Anorganische und Analytische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
| | - Peter Schweyen
- Institut für Anorganische und Analytische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
| | - Daria Gisinger
- Institut für Anorganische und Analytische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
| | - Thomas Bannenberg
- Institut für Anorganische und Analytische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
| | - Matthias Freytag
- Institut für Anorganische und Analytische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
| | - Christian Kleeberg
- Institut für Anorganische und Analytische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
| | - Matthias Tamm
- Institut für Anorganische und Analytische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
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68
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Arrowsmith M, Braunschweig H, Stennett TE. Formation and Reactivity of Electron-Precise B−B Single and Multiple Bonds. Angew Chem Int Ed Engl 2016; 56:96-115. [DOI: 10.1002/anie.201610072] [Citation(s) in RCA: 185] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Indexed: 01/25/2023]
Affiliation(s)
- Merle Arrowsmith
- Julius Maximilians Universität Würzburg; Department of Chemistry; Am Hubland Würzburg 97074 Germany
| | - Holger Braunschweig
- Julius Maximilians Universität Würzburg; Department of Chemistry; Am Hubland Würzburg 97074 Germany
| | - Tom E. Stennett
- Julius Maximilians Universität Würzburg; Department of Chemistry; Am Hubland Würzburg 97074 Germany
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69
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Synthese und Reaktivität von Verbindungen mit elektronenpräzisen B‐B‐Einfach‐ und B‐B‐Mehrfachbindungen. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201610072] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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70
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Kusevska E, Montero-Campillo MM, Mó O, Yáñez M. Boron-Boron One-Electron Sigma Bonds versus B-X-B Bridged Structures. Chemistry 2016; 22:13697-704. [DOI: 10.1002/chem.201600976] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Elena Kusevska
- Departamento de Química, Facultad de Ciencias, Módulo 13; Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC; Cantoblanco 28049 Madrid Spain
| | - M. Merced Montero-Campillo
- Departamento de Química, Facultad de Ciencias, Módulo 13; Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC; Cantoblanco 28049 Madrid Spain
| | - Otilia Mó
- Departamento de Química, Facultad de Ciencias, Módulo 13; Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC; Cantoblanco 28049 Madrid Spain
| | - Manuel Yáñez
- Departamento de Química, Facultad de Ciencias, Módulo 13; Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC; Cantoblanco 28049 Madrid Spain
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71
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Wang H, Zhang J, Lin Z, Xie Z. Synthesis and Structural Characterization of Carbene-Stabilized Carborane-Fused Azaborolyl Radical Cation and Dicarbollyl-Fused Azaborole. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00545] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hao Wang
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Jiji Zhang
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Zhenyang Lin
- Department of Chemistry, The Hong Kong University of Science and Technology,
Clear Water Bay, Kowloon, Hong Kong, People’s Republic of China
| | - Zuowei Xie
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
- State Key Laboratory of Elemento-Organic
Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
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72
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Neeve EC, Geier SJ, Mkhalid IAI, Westcott SA, Marder TB. Diboron(4) Compounds: From Structural Curiosity to Synthetic Workhorse. Chem Rev 2016; 116:9091-161. [PMID: 27434758 DOI: 10.1021/acs.chemrev.6b00193] [Citation(s) in RCA: 737] [Impact Index Per Article: 92.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Although known for over 90 years, only in the past two decades has the chemistry of diboron(4) compounds been extensively explored. Many interesting structural features and reaction patterns have emerged, and more importantly, these compounds now feature prominently in both metal-catalyzed and metal-free methodologies for the formation of B-C bonds and other processes.
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Affiliation(s)
- Emily C Neeve
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Würzburg 97074, Germany
| | - Stephen J Geier
- Mount Allison University , Department of Biochemistry and Chemistry, Sackville, New Brunswick E4L 1G8, Canada
| | | | - Stephen A Westcott
- Mount Allison University , Department of Biochemistry and Chemistry, Sackville, New Brunswick E4L 1G8, Canada
| | - Todd B Marder
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Würzburg 97074, Germany
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73
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Kong L, Lu W, Li Y, Ganguly R, Kinjo R. Isolation of a Diborane(6) Dication: Formation and Cleavage of an Electron-Precise B(sp3)–B(sp3) Bond. J Am Chem Soc 2016; 138:8623-9. [DOI: 10.1021/jacs.6b04858] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lingbing Kong
- Division
of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences, and ‡NTU-CBC Crystallography Facility, Nanyang Technological University, 637371, Singapore
| | - Wei Lu
- Division
of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences, and ‡NTU-CBC Crystallography Facility, Nanyang Technological University, 637371, Singapore
| | - Yongxin Li
- Division
of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences, and ‡NTU-CBC Crystallography Facility, Nanyang Technological University, 637371, Singapore
| | - Rakesh Ganguly
- Division
of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences, and ‡NTU-CBC Crystallography Facility, Nanyang Technological University, 637371, Singapore
| | - Rei Kinjo
- Division
of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences, and ‡NTU-CBC Crystallography Facility, Nanyang Technological University, 637371, Singapore
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74
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Kaese T, Hübner A, Bolte M, Lerner HW, Wagner M. Forming B–B Bonds by the Controlled Reduction of a Tetraaryl-diborane(6). J Am Chem Soc 2016; 138:6224-33. [DOI: 10.1021/jacs.6b02303] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thomas Kaese
- Institut
für Anorganische
und Analytische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Straße
7, D-60438 Frankfurt
am Main, Germany
| | - Alexander Hübner
- Institut
für Anorganische
und Analytische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Straße
7, D-60438 Frankfurt
am Main, Germany
| | - Michael Bolte
- Institut
für Anorganische
und Analytische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Straße
7, D-60438 Frankfurt
am Main, Germany
| | - Hans-Wolfram Lerner
- Institut
für Anorganische
und Analytische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Straße
7, D-60438 Frankfurt
am Main, Germany
| | - Matthias Wagner
- Institut
für Anorganische
und Analytische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Straße
7, D-60438 Frankfurt
am Main, Germany
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75
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Zhao D, Xie Z. Visible-Light-Promoted Photocatalytic B−C Coupling via a Boron-Centered Carboranyl Radical: Facile Synthesis of B(3)-Arylatedo-Carboranes. Angew Chem Int Ed Engl 2016; 55:3166-70. [DOI: 10.1002/anie.201511251] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 12/28/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Da Zhao
- Department of Chemistry and State Key Laboratory of Synthetic, Chemistry; The Chinese University of Hong Kong; Shatin, N.T. Hong Kong China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic, Chemistry; The Chinese University of Hong Kong; Shatin, N.T. Hong Kong China
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76
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Zhao D, Xie Z. Visible-Light-Promoted Photocatalytic B−C Coupling via a Boron-Centered Carboranyl Radical: Facile Synthesis of B(3)-Arylatedo-Carboranes. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511251] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Da Zhao
- Department of Chemistry and State Key Laboratory of Synthetic, Chemistry; The Chinese University of Hong Kong; Shatin, N.T. Hong Kong China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic, Chemistry; The Chinese University of Hong Kong; Shatin, N.T. Hong Kong China
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77
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Brea O, Mó O, Yáñez M, Alkorta I, Elguero J. On the existence of intramolecular one-electron Be–Be bonds. Chem Commun (Camb) 2016; 52:9656-9. [DOI: 10.1039/c6cc04350j] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The electron attachment to 1,8-diBeX-naphthalene derivatives leads to rather stable radical anions through the formation of one-electron Be–Be bonds.
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Affiliation(s)
- Oriana Brea
- Departamento de Química
- Facultad de Ciencias
- Universidad Autónoma de Madrid
- Campus de Excelencia UAM-CSIC
- 28049-Madrid
| | - Otilia Mó
- Departamento de Química
- Facultad de Ciencias
- Universidad Autónoma de Madrid
- Campus de Excelencia UAM-CSIC
- 28049-Madrid
| | - Manuel Yáñez
- Departamento de Química
- Facultad de Ciencias
- Universidad Autónoma de Madrid
- Campus de Excelencia UAM-CSIC
- 28049-Madrid
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78
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Yuan N, Wang W, Wu Z, Chen S, Tan G, Sui Y, Wang X, Jiang J, Power PP. A boron-centered radical: a potassium-crown ether stabilized boryl radical anion. Chem Commun (Camb) 2016; 52:12714-12716. [DOI: 10.1039/c6cc06918e] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A boron radical contact ion-pair has been isolated, an intermediate stage between free radical anions and neutral radicals of boron.
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Affiliation(s)
- Ningning Yuan
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210093
| | - Wenqing Wang
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210093
| | - Ziye Wu
- Collaborative Innovation Center of Chemistry for Energy Materials
- CAS Key Laboratory of Mechanical Behavior and Design of Materials
- School of Chemistry and Materials Science
- University of Science and Technology of China
- Hefei
| | - Sheng Chen
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210093
| | - Gengwen Tan
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210093
| | - Yunxia Sui
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210093
| | - Xinping Wang
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210093
| | - Jun Jiang
- Collaborative Innovation Center of Chemistry for Energy Materials
- CAS Key Laboratory of Mechanical Behavior and Design of Materials
- School of Chemistry and Materials Science
- University of Science and Technology of China
- Hefei
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79
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Osumi S, Saito S, Dou C, Matsuo K, Kume K, Yoshikawa H, Awaga K, Yamaguchi S. Boron-doped nanographene: Lewis acidity, redox properties, and battery electrode performance. Chem Sci 2015; 7:219-227. [PMID: 29861978 PMCID: PMC5952319 DOI: 10.1039/c5sc02246k] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 09/24/2015] [Indexed: 11/23/2022] Open
Abstract
The impact of boron doping on the nature of nanographene was investigated at the molecular level in terms of chemical adsorption with various Lewis bases, spin multiplicity of the two electron-reduced species, and performance as a battery electrode.
The preparation of boron-doped nanocarbon scaffolds with well-defined structures is important for the understanding of the impact of boron doping on their properties and behavior at the molecular level. We recently succeeded in the synthesis of a structurally well-defined nanographene molecule, bearing two boron atoms at the central positions. In this study, the characteristic properties and functions of this boron-doped nanographene were investigated in terms of (1) Lewis acidity, (2) redox properties, and (3) electrode performance in a battery. This boron-doped nanographene was susceptible to chemical adsorption with various Lewis bases, resulting in significant changes in the absorption and fluorescence properties, as well as in the conformation of the honeycomb framework. The two-electron reduction of this boron-doped nanographene produced a dianionic species that showed a substantial biradical character with a triplet ground state. A Li battery electrode, composed of a boron-doped nanographene with small peripheral substituents, displayed a stable performance in the 1.5–4.0 V range with a first discharge capacity of 160 mA h g–1. These results provide important insights into the effect of boron doping on nanocarbon compounds.
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Affiliation(s)
- Shinichiro Osumi
- Department of Chemistry , Graduate School of Science , Nagoya University , Furo, Chikusa , Nagoya 464-8602 , Japan .
| | - Shohei Saito
- Department of Chemistry , Graduate School of Science , Nagoya University , Furo, Chikusa , Nagoya 464-8602 , Japan .
| | - Chuandong Dou
- Department of Chemistry , Graduate School of Science , Nagoya University , Furo, Chikusa , Nagoya 464-8602 , Japan .
| | - Kyohei Matsuo
- Department of Chemistry , Graduate School of Science , Nagoya University , Furo, Chikusa , Nagoya 464-8602 , Japan .
| | - Keita Kume
- Department of Chemistry , Graduate School of Science , Nagoya University , Furo, Chikusa , Nagoya 464-8602 , Japan .
| | - Hirofumi Yoshikawa
- Department of Chemistry , Graduate School of Science , Nagoya University , Furo, Chikusa , Nagoya 464-8602 , Japan .
| | - Kunio Awaga
- Department of Chemistry , Graduate School of Science , Nagoya University , Furo, Chikusa , Nagoya 464-8602 , Japan .
| | - Shigehiro Yamaguchi
- Department of Chemistry , Graduate School of Science , Nagoya University , Furo, Chikusa , Nagoya 464-8602 , Japan . .,Institute of Transformative Bio-Molecules (WPI-ITbM) , Nagoya University , Furo, Chikusa , Nagoya 464-8602 , Japan . .,CREST , Japan Science and Technology Agency (JST) , Furo, Chikusa , Nagoya 464-8602 , Japan
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80
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Zheng Y, Xiong J, Sun Y, Pan X, Wu J. Stepwise Reduction of 9,10-Bis(dimesitylboryl)anthracene. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505766] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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81
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Zheng Y, Xiong J, Sun Y, Pan X, Wu J. Stepwise Reduction of 9,10‐Bis(dimesitylboryl)anthracene. Angew Chem Int Ed Engl 2015; 54:12933-6. [DOI: 10.1002/anie.201505766] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 07/22/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Yang Zheng
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000 (P.R. China)
| | - Jiao Xiong
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000 (P.R. China)
| | - Yangyang Sun
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000 (P.R. China)
| | - Xiaobo Pan
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000 (P.R. China)
| | - Jincai Wu
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000 (P.R. China)
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82
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Landmann J, Sprenger JAP, Hailmann M, Bernhardt-Pitchougina V, Willner H, Ignat'ev N, Bernhardt E, Finze M. The Hexacyanodiborane(6) Dianion [B2(CN)6]2−. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/anie.201504579] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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83
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Landmann J, Sprenger JAP, Hailmann M, Bernhardt-Pitchougina V, Willner H, Ignat'ev N, Bernhardt E, Finze M. Das Hexacyanodiboran(6)-Dianion [B2(CN)6]2−. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504579] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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84
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Zhang Z, Edkins RM, Haehnel M, Wehner M, Eichhorn A, Mailänder L, Meier M, Brand J, Brede F, Müller-Buschbaum K, Braunschweig H, Marder TB. Taming the beast: fluoromesityl groups induce a dramatic stability enhancement in boroles. Chem Sci 2015; 6:5922-5927. [PMID: 28791091 PMCID: PMC5523080 DOI: 10.1039/c5sc02205c] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 07/10/2015] [Indexed: 11/21/2022] Open
Abstract
Boroles with a fluoromesityl group on the B atom have greatly improved air stability compared to their mesityl analogues.
The electron-deficient pentaarylborole 1-(2′,4′,6′-tris(trifluoromethyl)phenyl)-2,3,4,5-tetraphenylborole (1) has been synthesised with the long-term aim of developing borole-based optoelectronic materials. The bulky 2,4,6-tris(trifluoromethyl)phenyl (FMes) group on the boron atom of 1 significantly improves (>600 times) its air stability relative to its mesityl analogue. Moreover, 1 shows good thermal stability without undergoing the dimerisation or isomerisation reactions reported for some other boroles. A triarylborole analogue (2), belonging to a new class of borole with the 3- and 4-positions of the BC4 ring linked by a –(CH2)3– group, has also been synthesised to elucidate the influence of carbon-bonded substituents on the stability of boroles. Both boroles were prepared through the reaction of Li[FMesBF3] and divinyldilithium reagents, a new and general method for borole syntheses. Compound 2 was found to isomerise through a [1,3]-H shift and double-bond rearrangement to an s-trans-butadienylborane species under highly basic (NaOH) conditions. The increased steric crowding at the boron centre through incorporation of the FMes group does not preclude binding of Lewis bases to either 1 or 2, as demonstrated by their fully reversible binding of pyridine. Interestingly, 1 exhibits a blue-shifted absorption spectrum, as compared with its mesityl analogue, a result contrary to previous understanding of the influence of substituent electronics on the absorption spectra of boroles. Most importantly, these boroles exhibit much greater air-stability than previously reported analogues without sacrificing the strong electron-accepting ability that makes boroles so attractive; indeed, 1 and 2 have very low reduction potentials of –1.52 and –1.69 eV vs. Fc/Fc+, respectively.
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Affiliation(s)
- Zuolun Zhang
- State Key Laboratory of Supramolecular Structure and Materials , College of Chemistry , Jilin University , Changchun 130012 , P. R. China.,Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Robert M Edkins
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Martin Haehnel
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Marius Wehner
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Antonius Eichhorn
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Lisa Mailänder
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Michael Meier
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Johannes Brand
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Franziska Brede
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Klaus Müller-Buschbaum
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Holger Braunschweig
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Todd B Marder
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
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85
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Rosenthal AJ, Devillard M, Miqueu K, Bouhadir G, Bourissou D. A Phosphine-Coordinated Boron-Centered Gomberg-Type Radical. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504502] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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86
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Rosenthal AJ, Devillard M, Miqueu K, Bouhadir G, Bourissou D. A Phosphine-Coordinated Boron-Centered Gomberg-Type Radical. Angew Chem Int Ed Engl 2015; 54:9198-202. [DOI: 10.1002/anie.201504502] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Indexed: 11/08/2022]
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87
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Ji L, Edkins RM, Lorbach A, Krummenacher I, Brückner C, Eichhorn A, Braunschweig H, Engels B, Low PJ, Marder TB. Electron Delocalization in Reduced Forms of 2-(BMes2)pyrene and 2,7-Bis(BMes2)pyrene. J Am Chem Soc 2015; 137:6750-3. [DOI: 10.1021/jacs.5b03805] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Lei Ji
- Institut
für Anorganische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Robert M. Edkins
- Institut
für Anorganische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Andreas Lorbach
- Institut
für Anorganische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Ivo Krummenacher
- Institut
für Anorganische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Charlotte Brückner
- Institut
für Physikalische und Theoretische Chemie, Universität Würzburg, Emil-Fischer-Straße 42, 97074 Würzburg, Germany
| | - Antonius Eichhorn
- Institut
für Anorganische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Holger Braunschweig
- Institut
für Anorganische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Bernd Engels
- Institut
für Physikalische und Theoretische Chemie, Universität Würzburg, Emil-Fischer-Straße 42, 97074 Würzburg, Germany
| | - Paul J. Low
- School
of Chemistry and Biochemistry, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Todd B. Marder
- Institut
für Anorganische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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88
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Adams IA, Rupar PA. A Poly(9-Borafluorene) Homopolymer: An Electron-Deficient Polyfluorene with “Turn-On” Fluorescence Sensing of NH3
Vapor. Macromol Rapid Commun 2015; 36:1336-40. [DOI: 10.1002/marc.201500107] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 04/03/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Ian A. Adams
- Department of Chemistry; The University of Alabama; Tuscaloosa AL 35487-0036 USA
| | - Paul A. Rupar
- Department of Chemistry; The University of Alabama; Tuscaloosa AL 35487-0036 USA
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89
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Hübner A, Kaese T, Diefenbach M, Endeward B, Bolte M, Lerner HW, Holthausen MC, Wagner M. A preorganized ditopic borane as highly efficient one- or two-electron trap. J Am Chem Soc 2015; 137:3705-14. [PMID: 25723124 DOI: 10.1021/jacs.5b01192] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Reduction of the bis(9-borafluorenyl)methane 1 with excess lithium furnishes the red dianion salt Li2[1]. The corresponding dark green monoanion radical Li[1] is accessible through the comproportionation reaction between 1 and Li2[1]. EPR spectroscopy on Li[1] reveals hyperfine coupling of the unpaired electron to two magnetically equivalent boron nuclei (a((11)B) = 5.1 ± 0.1 G, a((10)B) = 1.7 ± 0.2 G). Further coupling is observed to the unique B-CH-B bridgehead proton (a((1)H) = 7.2 ± 0.2 G) and to eight aromatic protons (a((1)H) = 1.4 ± 0.1 G). According to X-ray crystallography, the B···B distances continuously decrease along the sequence 1 → [1](•-) → [1](2-) with values of 2.534(2), 2.166(4), and 1.906(3) Å, respectively. Protonation of Li2[1] leads to the cyclic borohydride species Li[1H] featuring a B-H-B two-electron-three-center bond. This result strongly indicates a nucleophilic character of the boron atoms; the reaction can also be viewed as rare example of the protonation of an element-element σ bond. According to NMR spectroscopy, EPR spectroscopy, and quantum-chemical calculations, [1](2-) represents a closed-shell singlet without any spin contamination. Detailed wave function analyses of [1](•-) and [1](2-) reveal strongly localized interactions of the two boron pz-type orbitals, with small delocalized contributions of the 9-borafluorenyl π systems. Overall, our results provide evidence for a direct B-B one-electron and two-electron bonding interaction in [1](•-) and [1](2-), respectively.
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Affiliation(s)
- Alexander Hübner
- †Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Str. 7, D-60438 Frankfurt am Main, Germany
| | - Thomas Kaese
- †Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Str. 7, D-60438 Frankfurt am Main, Germany
| | - Martin Diefenbach
- †Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Str. 7, D-60438 Frankfurt am Main, Germany
| | - Burkhard Endeward
- ‡Institut für Physikalische und Theoretische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Str. 7, D-60438 Frankfurt am Main, Germany
| | - Michael Bolte
- †Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Str. 7, D-60438 Frankfurt am Main, Germany
| | - Hans-Wolfram Lerner
- †Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Str. 7, D-60438 Frankfurt am Main, Germany
| | - Max C Holthausen
- †Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Str. 7, D-60438 Frankfurt am Main, Germany
| | - Matthias Wagner
- †Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Str. 7, D-60438 Frankfurt am Main, Germany
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90
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Asakawa H, Lee KH, Furukawa K, Lin Z, Yamashita M. Lowering the reduction potential of a boron compound by means of the substituent effect of the boryl group: one-electron reduction of an unsymmetrical diborane(4). Chemistry 2015; 21:4267-71. [PMID: 25639658 DOI: 10.1002/chem.201406609] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Indexed: 11/11/2022]
Abstract
We have clarified and observed the high electron affinity of pinB-BMes2 (1; Mes = mesityl, pin = pinacolato). By using electrochemistry, it was shown that 1 has a higher electron affinity than those of B2pin2 and Mes3B. One-electron reduction of 1 gave the corresponding radical anion. The ESR spectroscopy and DFT calculation revealed the unsymmetrical distribution of electron density over the B-B bond. UV/Vis spectroscopy showed that the SOMO-related absorption supports the deep purple color of the radical anion. DFT studies on the torsion angle dependency of the LUMO levels and relative energies revealed the reason why 1 has high electron affinity as a result of the substituent effect of the Bpin group.
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Affiliation(s)
- Hiroki Asakawa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27, Kasuga, Bunkyo-ku, 112-8551 Tokyo (Japan) http://www.chem.chuo-u.ac.jp/∼element/index-e.html
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91
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Huang K, Martin CD. Ring expansion reactions of pentaphenylborole with dipolar molecules as a route to seven-membered boron heterocycles. Inorg Chem 2015; 54:1869-75. [PMID: 25599271 DOI: 10.1021/ic502784d] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Reactions of pentaphenylborole with isocyanates, benzophenone, and benzaldehyde produced new seven-membered heterocycles in high yields. For 1-adamantyl isocyanate, a BNC5 heterocycle was obtained from the insertion of the C-N moiety into the five-membered borole, whereas for 4-methoxyphenyl isocyanate, a BOC5 heterocycle was generated from the insertion of the C-O unit. These reactions are believed to occur via a mechanism wherein coordination of the nucleophile to the borole (1-adamantyl, N-coordination or O-coordination for 4-methoxyphenyl) is followed by ring expansion to afford the observed seven-membered heterocycles. The selectivity to form B-O- or B-N-containing heterocycles is based on the polarization of the isocyanate implying tunable reactivity for the system. Having observed that isocyanates react as 1,2-dipoles with pentaphenylborole, we examined benzophenone and benzaldehyde, which both reacted to insert C-O units into the ring. This represents a new efficient method for preparing rare seven-membered boracycles.
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Affiliation(s)
- Kexuan Huang
- Baylor University , Department of Chemistry and Biochemistry, One Bear Place 97348, Waco, Texas 76798, United States
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92
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Hübner A, Bolte M, Lerner HW, Wagner M. Extensive Structural Rearrangements upon Reduction of 9H-9-Borafluorene. Angew Chem Int Ed Engl 2014; 53:10408-11. [DOI: 10.1002/anie.201405957] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 07/02/2014] [Indexed: 11/08/2022]
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93
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Hübner A, Bolte M, Lerner HW, Wagner M. Extensive Structural Rearrangements upon Reduction of 9H-9-Borafluorene. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405957] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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94
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Isolation of a Neutral Boron‐Containing Radical Stabilized by a Cyclic (Alkyl)(Amino)Carbene. Angew Chem Int Ed Engl 2014; 53:7360-3. [DOI: 10.1002/anie.201403514] [Citation(s) in RCA: 141] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Revised: 05/06/2014] [Indexed: 11/07/2022]
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95
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Bissinger P, Braunschweig H, Damme A, Krummenacher I, Phukan AK, Radacki K, Sugawara S. Isolierung eines neutralen, Bor‐haltigen Radikals, stabilisiert durch ein cyclisches (Alkyl)(amino)carben. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403514] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Philipp Bissinger
- Institut für Anorganische Chemie, Julius‐Maximilians‐Universität Würzburg, Am Hubland, 97074 Würzburg (Deutschland)
| | - Holger Braunschweig
- Institut für Anorganische Chemie, Julius‐Maximilians‐Universität Würzburg, Am Hubland, 97074 Würzburg (Deutschland)
| | - Alexander Damme
- Institut für Anorganische Chemie, Julius‐Maximilians‐Universität Würzburg, Am Hubland, 97074 Würzburg (Deutschland)
| | - Ivo Krummenacher
- Institut für Anorganische Chemie, Julius‐Maximilians‐Universität Würzburg, Am Hubland, 97074 Würzburg (Deutschland)
| | | | - Krzysztof Radacki
- Institut für Anorganische Chemie, Julius‐Maximilians‐Universität Würzburg, Am Hubland, 97074 Würzburg (Deutschland)
| | - Shun Sugawara
- Department of Chemistry, Graduate School of Science, Hiroshima University (Japan)
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