1
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Jurt P, Gamboa-Carballo JJ, Schweinzer C, Himmelbauer D, Thöny D, Gianetti TL, Trincado M, Grützmacher H. Selective dehydrogenation of ammonia borane to borazine and derivatives by rhodium olefin complexes. Dalton Trans 2024. [PMID: 39140315 PMCID: PMC11323292 DOI: 10.1039/d4dt01520g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Accepted: 07/24/2024] [Indexed: 08/15/2024]
Abstract
This report presents a selective synthetic approach towards borazine from ammonia borane using a dinuclear rhodium olefin homogeneous catalyst. The synthesis and spectroscopic characterization of a dirhodium ammonia borane complex as an intermediate provides insight into a possible mode of activation.
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Affiliation(s)
- Pascal Jurt
- Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8049 Zurich, Switzerland.
| | - Juan José Gamboa-Carballo
- Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8049 Zurich, Switzerland.
- Higher Institute of Technologies and Applied Sciences (InSTEC), University of Havana, Ave. S. Allende 1110, 10600 Havana, Cuba
| | - Clara Schweinzer
- Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8049 Zurich, Switzerland.
| | - Daniel Himmelbauer
- Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, A-1060 Vienna, Austria
| | - Debora Thöny
- Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8049 Zurich, Switzerland.
| | - Thomas L Gianetti
- Department of Chemistry and Biochemistry, University of Arizona, University Blvd., Tucson, AZ 85719, USA.
| | - Monica Trincado
- Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8049 Zurich, Switzerland.
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.
| | - Hansjörg Grützmacher
- Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8049 Zurich, Switzerland.
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2
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Zhou S, Liu Y, Jin W, Qin T, Liu X, Zhao C, Liu Z, Yu X. Synthesis, Structures, and Photophysical Properties of Zigzag BNBNB-Embedded Anthracene-Fused Fluoranthene. Org Lett 2023; 25:1573-1577. [PMID: 36825803 DOI: 10.1021/acs.orglett.3c00429] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Three zigzag BNBNB-embedded anthracene-fused fluoranthenes are synthesized from 1,3,2-benzodiazaboroles through an indole-type N-directed C-H borylation reaction. Single-crystal X-ray diffraction analyses confirm the double bond character of all four alternating B-N bonds and reveal the five-center four-π-electron nature of the BNBNB group. Experimental spectra and density functional theory calculations indicate that borylation remarkably enhances the planarity, extends π-conjugation, and leads to a bathochromic shift in the absorption and emission bands, with remarkable fluorescence quantum yields in solution (92%).
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Affiliation(s)
- Shimin Zhou
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China.,Shenzhen Research Institute of Shandong University, Shenzhen 518057, China
| | - Yang Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China.,Shenzhen Research Institute of Shandong University, Shenzhen 518057, China
| | - Wendong Jin
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China.,Shenzhen Research Institute of Shandong University, Shenzhen 518057, China
| | - Tingting Qin
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Xuguang Liu
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Cuihua Zhao
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Zhiqiang Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China.,Shenzhen Research Institute of Shandong University, Shenzhen 518057, China
| | - Xiaoqiang Yu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
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3
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Dosso J, Oubaha H, Fasano F, Melinte S, Gohy JF, Hughes CE, Harris KDM, Demitri N, Abrami M, Grassi M, Bonifazi D. Boron Nitride-Doped Polyphenylenic Organogels. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2022; 34:10670-10680. [PMID: 36530943 PMCID: PMC9753561 DOI: 10.1021/acs.chemmater.2c01766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 11/03/2022] [Indexed: 06/17/2023]
Abstract
Herein, we describe the synthesis of the first boron nitride-doped polyphenylenic material obtained through a [4 + 2] cycloaddition reaction between a triethynyl borazine unit and a biscyclopentadienone derivative, which undergoes organogel formation in chlorinated solvents (the critical jellification concentration is 4% w/w in CHCl3). The polymer has been characterized extensively by Fourier-transform infrared spectroscopy, solid-state 13C NMR, solid-state 11B NMR, and by comparison with the isolated monomeric unit. Furthermore, the polymer gels formed in chlorinated solvents have been thoroughly characterized and studied, showing rheological properties comparable to those of polyacrylamide gels with a low crosslinker percentage. Given the thermal and chemical stability, the material was studied as a potential support for solid-state electrolytes. showing properties comparable to those of polyethylene glycol-based electrolytes, thus presenting great potential for the application of this new class of material in lithium-ion batteries.
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Affiliation(s)
- Jacopo Dosso
- School
of Chemistry, Cardiff University, Park Place, CF10 3AT Cardiff, U.K.
| | - Hamid Oubaha
- Institute
of Information and Communication Technologies, Electronics and Applied
Mathematics, Université catholique
de Louvain, 1348 Louvain-la-Neuve, Belgium
| | - Francesco Fasano
- School
of Chemistry, Cardiff University, Park Place, CF10 3AT Cardiff, U.K.
| | - Sorin Melinte
- Institute
of Information and Communication Technologies, Electronics and Applied
Mathematics, Université catholique
de Louvain, 1348 Louvain-la-Neuve, Belgium
| | - Jean-François Gohy
- Institute
of Condensed Matter and Nanosciences, Université
catholique de Louvain, 1348 Louvain-la-Neuve, Belgium
| | - Colan E. Hughes
- School
of Chemistry, Cardiff University, Park Place, CF10 3AT Cardiff, U.K.
| | | | - Nicola Demitri
- Elettra—Sincrotrone
Trieste, S.S. 14 Km 163.5
in Area Science Park, 34149 Basovizza—Trieste, Italy
| | - Michela Abrami
- Department
of Engineering and Architecture, University
of Trieste, Via Alfonso,
Valerio, 6, I-34127 Trieste, Italy
| | - Mario Grassi
- Department
of Engineering and Architecture, University
of Trieste, Via Alfonso,
Valerio, 6, I-34127 Trieste, Italy
| | - Davide Bonifazi
- School
of Chemistry, Cardiff University, Park Place, CF10 3AT Cardiff, U.K.
- Institute
of Organic Chemistry, University of Vienna, 1090 Vienna, Austria
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4
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Neogi I, Szpilman AM. Synthesis and Reactions of Borazines. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1684-0031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractGiven the wide array of current applications of borazine-based materials, synthetic access to these compounds is of importance. This review summarizes the many ways of preparing borazines and its carbo-substituted analogues. In addition, the functionalization of borazines is covered. The synthesis of molecules incorporating more than one borazine units as well as aspects of unsymmetrically substituted borazines are not included. The literature has been covered comprehensively until the end of 2020.1 Introduction: Structure and Properties of Borazine2 Synthesis of Parent Borazine3 Synthesis of N-Substituted Borazines4 Synthesis of B-Halo/B-Halo-N-Substituted Borazines5 Synthesis of B-Substituted Borazines6 Synthesis of Polycyclic Borazines Containing One Borazine Ring7 Modifications or Hydrolysis of the Borazine Ring8 Borazine Metal Complexes9 Outlook and Conclusion
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Affiliation(s)
- Ishita Neogi
- Photoscience and Photonics Section, Chemical Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST)
- Academy of Scientific and Innovative Research (AcSIR)
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5
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Li P, Jia Y, Zhang S, Di J, Zhang N, Chen P. Oligotriarylamine-Extended Organoboranes with Tunable Electron-Donating Strength by Changing the Number of Donor Units. Inorg Chem 2022; 61:3951-3958. [PMID: 35201745 DOI: 10.1021/acs.inorgchem.1c03578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Triarylborane (Ar3B) and triarylamine (Ar3N) have been widely employed to construct electronically different donor-acceptor (D-A) systems. Herein, we describe a series of A-D-A-type luminescent organoboranes L-B2Nn (n = 1, 3, 5) that show an increased number of Ar3N units as electron donors and two terminal Ar3B as acceptors. When the Ar3N moieties were extended from one to five units, their electron-donating strength was gradually enhanced and the highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) energy gaps could also be tuned, which was further reflected in the red-shifted emissions from blue (λem = 458 nm) to orange (λem = 595 nm) with a decrease in Egap(elect) from 3.19 to 2.61 eV. L-B2N5 showed a huge Stokes shift (∼14 057 cm-1) and a considerably bright emission with an enhanced solid-state quantum efficiency (ΦS = 98%) compared with the other members. L-B2N3 and L-B2N5 exhibited aggregation-induced emissions (AIEs), and an apparent solvatochromic shift was also observed in the emission spectra as the solvent was changed from hexane to tetrahydrofuran (THF) (430 → 595 nm). In addition, the donor-acceptor charge-transfer character in these organoboranes caused a thermally responsive emission over a broad range.
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Affiliation(s)
- Pengfei Li
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing 102488, China
| | - Yawei Jia
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing 102488, China
| | - Songhe Zhang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing 102488, China
| | - Jiaqi Di
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing 102488, China
| | - Niu Zhang
- Analysis & Testing Center, Beijing Institute of Technology of China, Beijing 102488, China
| | - Pangkuan Chen
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing 102488, China
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6
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Hackney HE, Hall DG. Recent Advances in the Luminescence of Arylboronic Acids and their Heteroatom Condensates. CHEMPHOTOCHEM 2022. [DOI: 10.1002/cptc.202100219] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hannah E. Hackney
- Department of Chemistry University of Alberta Centennial Centre for Interdisciplinary Science Edmonton Alberta Canada
- Current address Department of Chemistry McGill University Montreal Quebec Canada
| | - Dennis G. Hall
- Department of Chemistry University of Alberta Centennial Centre for Interdisciplinary Science Edmonton Alberta Canada
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7
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Krebs J, Haehnel M, Krummenacher I, Friedrich A, Braunschweig H, Finze M, Ji L, Marder TB. Synthesis and Structure of an o-Carboranyl-Substituted Three-Coordinate Borane Radical Anion. Chemistry 2021; 27:8159-8167. [PMID: 33769625 PMCID: PMC8252506 DOI: 10.1002/chem.202100938] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Indexed: 12/14/2022]
Abstract
Bis(1-(4-tolyl)-carboran-2-yl)-(4-tolyl)-borane [(1-(4-MeC6 H4 )-closo-1,2-C2 B10 H10 -2-)2 (4-MeC6 H4 )B] (1), a new bis(o-carboranyl)-(R)-borane was synthesised by lithiation of the o-carboranyl precursor and subsequent salt metathesis reaction with (4-tolyl)BBr2 . Cyclic voltammetry experiments on 1 show multiple distinct reduction events with a one-electron first reduction. In a selective reduction experiment the corresponding paramagnetic radical anion 1.- was isolated and characterized. Single-crystal structure analyses allow an in-depth comparison of 1, 1.- , their calculated geometries, and the S1 excited state of 1. Photophysical studies of 1 show a charge transfer (CT) emission with low quantum yield in solution but a strong increase in the solid state. TD-DFT calculations were used to identify transition-relevant orbitals.
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Affiliation(s)
- Johannes Krebs
- Institute for Inorganic ChemistryInstitute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Martin Haehnel
- Institute for Inorganic ChemistryInstitute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Ivo Krummenacher
- Institute for Inorganic ChemistryInstitute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Alexandra Friedrich
- Institute for Inorganic ChemistryInstitute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Holger Braunschweig
- Institute for Inorganic ChemistryInstitute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Maik Finze
- Institute for Inorganic ChemistryInstitute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Lei Ji
- Frontiers Science Center for Flexible Electronics (FSCFE)Shaanxi Institute of Flexible Electronics (SIFE)Northwestern Polytechnical University127 West Youyi Road710072Xi'anP. R. China
| | - Todd B. Marder
- Institute for Inorganic ChemistryInstitute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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8
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Pandey UP, Nandi RP, Thilagar P. Design, Synthesis, and Temperature-Driven Molecular Conformation-Dependent Delayed Fluorescence Characteristics of Dianthrylboron-Based Donor-Acceptor Systems. Front Chem 2020; 8:541331. [PMID: 33195044 PMCID: PMC7581868 DOI: 10.3389/fchem.2020.541331] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 08/27/2020] [Indexed: 11/13/2022] Open
Abstract
We report a simple and novel molecular design strategy to enhance rISC in boron-based donor-acceptor systems to achieve improved delayed fluorescence characteristics. Dianthrylboryl ((An)2B)-based aryl aminoboranes 1 (donor: phenothiazine) and 2 (donor: N,N-diphenylamine) were synthesized by a simple one-pot procedure. The energy of the electronic excited states in 1 and 2 were modulated by varying the arylamine donor strength and electronic coupling between D and A moieties. The presence of a large π-system (anthryl moiety) on boron enhances the electronic communication between donor arylamine and acceptor boryl moieties, and hence, both 1 and 2 exhibit delayed fluorescence characteristics in a broad range of temperatures (80-300 K). Single crystal X-ray analysis and temperature-dependent photophysical studies together with theoretical studies were carried out to rationalize the observed intriguing optical signatures of 1 and 2.
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Affiliation(s)
- Umesh Pratap Pandey
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, India
| | - Rajendra Prasad Nandi
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, India
| | - Pakkirisamy Thilagar
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, India
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9
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Rauch F, Endres P, Friedrich A, Sieh D, Hähnel M, Krummenacher I, Braunschweig H, Finze M, Ji L, Marder TB. An Iterative Divergent Approach to Conjugated Starburst Borane Dendrimers. Chemistry 2020; 26:12951-12963. [PMID: 32428359 PMCID: PMC7590090 DOI: 10.1002/chem.202001985] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 05/13/2020] [Indexed: 12/21/2022]
Abstract
Using a new divergent approach, conjugated triarylborane dendrimers were synthesized up to the 2nd generation. The synthetic strategy consists of three steps: 1) functionalization, via iridium catalyzed C-H borylation; 2) activation, via fluorination of the generated boronate ester with K[HF2 ] or [N(nBu4 )][HF2 ]; and 3) expansion, via reaction of the trifluoroborate salts with aryl Grignard reagents. The concept was also shown to be viable for a convergent approach. All but one of the conjugated borane dendrimers exhibit multiple, distinct and reversible reduction potentials, making them potentially interesting materials for applications in molecular accumulators. Based on their photophysical properties, the 1st generation dendrimers exhibit good conjugation over the whole system. However, the conjugation does not increase further upon expansion to the 2nd generation, but the molar extinction coefficients increase linearly with the number of triarylborane subunits, suggesting a potential application as photonic antennas.
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Affiliation(s)
- Florian Rauch
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Peter Endres
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Alexandra Friedrich
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Daniel Sieh
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Martin Hähnel
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Ivo Krummenacher
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Holger Braunschweig
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Maik Finze
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Lei Ji
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Frontiers Science Center for Flexible Electronics (FSCFE)Shaanxi Institute of Flexible Electronics (SIFE) &Shaanxi Institute of Biomedical Materials and Engineering (SIBME)Northwestern Polytechnical University127 West Youryi Road710072Xi'anChina
| | - Todd B. Marder
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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10
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Rauch F, Fuchs S, Friedrich A, Sieh D, Krummenacher I, Braunschweig H, Finze M, Marder TB. Highly Stable, Readily Reducible, Fluorescent, Trifluoromethylated 9-Borafluorenes. Chemistry 2020; 26:12794-12808. [PMID: 31999019 PMCID: PMC7589458 DOI: 10.1002/chem.201905559] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Indexed: 01/29/2023]
Abstract
Three different perfluoroalkylated borafluorenes (F Bf) were prepared and their electronic and photophysical properties were investigated. The systems have four trifluoromethyl moieties on the borafluorene moiety as well as two trifluoromethyl groups at the ortho positions of their exo-aryl moieties. They differ with regard to the para substituents on their exo-aryl moieties, being a proton (F XylF Bf, F Xyl: 2,6-bis(trifluoromethyl)phenyl), a trifluoromethyl group (F MesF Bf, F Mes: 2,4,6-tris(trifluoromethyl)phenyl) or a dimethylamino group (p-NMe2 -F XylF Bf, p-NMe2 -F Xyl: 4-(dimethylamino)-2,6-bis(trifluoromethyl)phenyl), respectively. All derivatives exhibit extraordinarily low reduction potentials, comparable to those of perylenediimides. The most electron-deficient derivative F MesF Bf was also chemically reduced and its radical anion isolated and characterized. Furthermore, all compounds exhibit very long fluorescent lifetimes of about 250 ns up to 1.6 μs; however, the underlying mechanisms responsible for this differ. The donor-substituted derivative p-NMe2 -F XylF Bf exhibits thermally activated delayed fluorescence (TADF) from a charge-transfer (CT) state, whereas the F MesF Bf and F XylF Bf borafluorenes exhibit only weakly allowed locally excited (LE) transitions due to their symmetry and low transition-dipole moments.
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Affiliation(s)
- Florian Rauch
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Sonja Fuchs
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Alexandra Friedrich
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Daniel Sieh
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Ivo Krummenacher
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Holger Braunschweig
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Maik Finze
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Todd B. Marder
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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11
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Rauch F, Krebs J, Günther J, Friedrich A, Hähnel M, Krummenacher I, Braunschweig H, Finze M, Marder TB. Electronically Driven Regioselective Iridium-Catalyzed C-H Borylation of Donor-π-Acceptor Chromophores Containing Triarylboron Acceptors. Chemistry 2020; 26:10626-10633. [PMID: 32510684 PMCID: PMC7497074 DOI: 10.1002/chem.202002348] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 06/05/2020] [Indexed: 12/11/2022]
Abstract
We observed a surprisingly high electronically driven regioselectivity for the iridium-catalyzed C-H borylation of donor-π-acceptor (D-π-A) systems with diphenylamino (1) or carbazolyl (2) moieties as the donor, bis(2,6-bis(trifluoromethyl)phenyl)boryl (B(F Xyl)2 ) as the acceptor, and 1,4-phenylene as the π-bridge. Under our conditions, borylation was observed only at the sterically least encumbered para-positions of the acceptor group. As boronate esters are versatile building blocks for organic synthesis (C-C coupling, functional group transformations) the C-H borylation represents a simple potential method for post-functionalization by which electronic or other properties of D-π-A systems can be fine-tuned for specific applications. The photophysical and electrochemical properties of the borylated (1-(Bpin)2 ) and unborylated (1) diphenylamino-substituted D-π-A systems were investigated. Interestingly, the borylated derivative exhibits coordination of THF to the boronate ester moieties, influencing the photophysical properties and exemplifying the non-innocence of boronate esters.
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Affiliation(s)
- Florian Rauch
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Johannes Krebs
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Julian Günther
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Alexandra Friedrich
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Martin Hähnel
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Ivo Krummenacher
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Holger Braunschweig
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Maik Finze
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Todd B. Marder
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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12
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Narsaria AK, Rauch F, Krebs J, Endres P, Friedrich A, Krummenacher I, Braunschweig H, Finze M, Nitsch J, Bickelhaupt FM, Marder TB. Computationally Guided Molecular Design to Minimize the LE/CT Gap in D-π-A Fluorinated Triarylboranes for Efficient TADF via D and π-Bridge Tuning. ADVANCED FUNCTIONAL MATERIALS 2020; 30:2002064. [PMID: 32774198 PMCID: PMC7405949 DOI: 10.1002/adfm.202002064] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 03/29/2020] [Accepted: 04/03/2020] [Indexed: 05/16/2023]
Abstract
In this combined experimental and theoretical study, a computational protocol is reported to predict the excited states in D-π-A compounds containing the B(FXyl)2 (FXyl = 2,6-bis(trifluoromethyl)phenyl) acceptor group for the design of new thermally activated delayed fluorescence (TADF) emitters. To this end, the effect of different donor and π-bridge moieties on the energy gaps between local and charge-transfer singlet and triplet states is examined. To prove this computationally aided design concept, the D-π-B(FXyl)2 compounds 1-5 were synthesized and fully characterized. The photophysical properties of these compounds in various solvents, polymeric film, and in a frozen matrix were investigated in detail and show excellent agreement with the computationally obtained data. Furthermore, a simple structure-property relationship is presented on the basis of the molecular fragment orbitals of the donor and the π-bridge, which minimize the relevant singlet-triplet gaps to achieve efficient TADF emitters.
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Affiliation(s)
- Ayush K. Narsaria
- Department of Theoretical ChemistryAmsterdam Institute of Molecular and Life Sciences (AIMMS)and Amsterdam Center for Multiscale Modeling (ACMM)Vrije Universiteit AmsterdamDe Boelelaan 1083AmsterdamNL‐1081 HVThe Netherlands
| | - Florian Rauch
- Institute for Inorganic ChemistryJulius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
- Institute for Sustainable Chemistry & Catalysis with Boron Julius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
| | - Johannes Krebs
- Institute for Inorganic ChemistryJulius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
- Institute for Sustainable Chemistry & Catalysis with Boron Julius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
| | - Peter Endres
- Institute for Inorganic ChemistryJulius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
- Institute for Sustainable Chemistry & Catalysis with Boron Julius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
| | - Alexandra Friedrich
- Institute for Inorganic ChemistryJulius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
- Institute for Sustainable Chemistry & Catalysis with Boron Julius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
| | - Ivo Krummenacher
- Institute for Inorganic ChemistryJulius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
- Institute for Sustainable Chemistry & Catalysis with Boron Julius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
| | - Holger Braunschweig
- Institute for Inorganic ChemistryJulius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
- Institute for Sustainable Chemistry & Catalysis with Boron Julius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
| | - Maik Finze
- Institute for Inorganic ChemistryJulius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
- Institute for Sustainable Chemistry & Catalysis with Boron Julius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
| | - Jörn Nitsch
- Institute for Inorganic ChemistryJulius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
- Institute for Sustainable Chemistry & Catalysis with Boron Julius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
| | - F. Matthias Bickelhaupt
- Department of Theoretical ChemistryAmsterdam Institute of Molecular and Life Sciences (AIMMS)and Amsterdam Center for Multiscale Modeling (ACMM)Vrije Universiteit AmsterdamDe Boelelaan 1083AmsterdamNL‐1081 HVThe Netherlands
- Institute for Molecules and Materials (IMM)Radboud UniversityHeyendaalseweg 135NijmegenNL‐6525 AJThe Netherlands
| | - Todd B. Marder
- Institute for Inorganic ChemistryJulius‐Maximilians‐Universität WürzburgAm HublandWürzburgD‐97074Germany
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13
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Belaidi H, Rauch F, Zhang Z, Latouche C, Boucekkine A, Marder TB, Halet J. Insights into the Optical Properties of Triarylboranes with Strongly Electron‐Accepting Bis(fluoromesityl)boryl Groups: when Theory Meets Experiment. CHEMPHOTOCHEM 2019. [DOI: 10.1002/cptc.201900256] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Houmam Belaidi
- Univ Rennes, CNRSInstitut des Sciences Chimiques de Rennes UMR 6226 35000 Rennes France
| | - Florian Rauch
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Zuolun Zhang
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
- State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin University Qianjin Street Changchun P. R. China
| | - Camille Latouche
- Institut des Matériaux Jean RouxelUniversité de Nantes, CNRS 2 rue de la Houssinière, BP 32229 44322 Nantes cedex 3 France
| | - Abdou Boucekkine
- Univ Rennes, CNRSInstitut des Sciences Chimiques de Rennes UMR 6226 35000 Rennes France
| | - Todd B. Marder
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Jean‐François Halet
- Univ Rennes, CNRSInstitut des Sciences Chimiques de Rennes UMR 6226 35000 Rennes France
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14
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Photoactive Boron–Nitrogen–Carbon Hybrids: From Azo-borazines to Polymeric Materials. J Org Chem 2019; 84:9101-9116. [DOI: 10.1021/acs.joc.9b01046] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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15
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Dosso J, Marinelli D, Demitri N, Bonifazi D. Structural Properties of Highly Doped Borazino Polyphenylenes Obtained through Condensation Reaction. ACS OMEGA 2019; 4:9343-9351. [PMID: 31460023 PMCID: PMC6649256 DOI: 10.1021/acsomega.9b00830] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 05/06/2019] [Indexed: 06/10/2023]
Abstract
Here we describe the synthesis and spectroscopic and structural characterization of various borazine-doped polyphenylenes displaying high doping dosages (16-18%). Capitalizing on the condensation reaction approach, the desired products were formed using a mixture of p-phenylendiamine and aniline with BCl3, followed by the addition of an aryl lithium derivative. The use of mesityl lithium (MesLi) yields strained multiborazine derivatives, which proved to be unstable in the presence of moisture. However, when xylyl lithium (XylLi) was used, chemically stable multiborazines were obtained, with oligomers showing molecular weight up to 104, corresponding to 16-18 monomer units. While the dimer, trimer, and tetramer could be isolated as pure products and their structure characterized by mass and NMR analysis, higher oligomers could only be isolated as mixtures of B-hydroxy-substituted derivatives and characterized by gel permeation chromatography. The structures of the dimer and trimer derivatives were confirmed by X-ray analysis, which nicely showed the presence of the two and three borazine rings spaced by one and two 1,4-aryl bridges, respectively. Notably, the trimer forms a porous crystalline clathrate. The peripheral xylyl and phenyl moieties of each molecule intramolecularly embrace each other through C-H and π-π stacking interactions. Steady-state UV-vis absorption characterization suggested that the molecules are UV absorbers, with the extinction coefficient linearly scaling with the degree of oligomerization. On the other hand, low-emission quantum yields were obtained for all derivatives (<7%), suggesting that high BN-doping dosages dramatically affect the emission properties of the doped polyphenylenes.
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Affiliation(s)
- Jacopo Dosso
- School
of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, U.K.
| | - Davide Marinelli
- School
of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, U.K.
| | - Nicola Demitri
- Elettra-Sincrotrone
Trieste, S. S. 14 km
163.5 in Area Science Park, Basovizza 34149, Trieste, Italy
| | - Davide Bonifazi
- School
of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, U.K.
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16
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Hahn J, Krieg M, Keck C, Maichle-Mössmer C, Fink RF, Bettinger HF. Thermal dehydrochlorination in the 4-fluoroaniline-trichloroborane system: identification of reactive intermediates involved in the formation of B,B',B''-trichloro-N,N',N''-tri((4-fluoro)phenyl)borazine. Dalton Trans 2018; 47:17304-17316. [PMID: 30475357 DOI: 10.1039/c8dt03954b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Borazines are used in chemical vapor deposition processes to produce hybrid graphene-boron nitride nanostructures. As the knowledge on the mechanism of borazine formation is scarce, we studied the mechanism of formation of B,B',B''-trichloro-N,N',N''-tri(p-fluorophenyl)borazine (3a) from p-fluoroaniline and boron trichloride employing NMR spectroscopy, X-ray single crystal structure analysis, trapping experiments, and computational chemistry methods up to the coupled cluster CCSD(T) level of theory. These studies suggest the initial formation of the 1 : 1 adduct 1a (ArNH2BCl3, Ar = 4-fluorophenyl) with a dative B-N bond that could be fully characterized including single crystal X-ray diffraction. Adduct 1a undergoes unimolecular hydrogen chloride elimination with a first-order rate constant of k1 = 3.03(7) × 10-2 min-1 in toluene at 100 °C. This rate constant is in very good agreement with the one derived (k1 = 3.18 × 10-2 min-1) from computed activation parameters (ΔH‡373.15 = 28.1 kcal mol-1, ΔS‡373.15 = 1.56 eu, ΔG‡373.15 = 27.6 kcal mol-1). The product of the first hydrogen chloride evolution is anilinodichloroborane ArNHBCl2 (2a). Compound 2a cannot be isolated in a pure form due to instability, but its presence as a transient reactive intermediate can be derived from NMR spectroscopy. Reactive intermediates other than anilinodichloroborane cannot be assigned by NMR spectroscopy. We propose that the mechanism of formation of borazine 3a involves the reaction of 2a with 4-fluoroaniline as the rate determining step.
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Affiliation(s)
- Jennifer Hahn
- Institut für Organische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
| | - Matthias Krieg
- Institut für Organische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
| | - Constanze Keck
- Institut für Organische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
| | - Cäcilia Maichle-Mössmer
- Institut für Anorganische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Reinhold F Fink
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Holger F Bettinger
- Institut für Organische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
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17
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Zhang W, Yu D, Wang Z, Zhang B, Xu L, Li G, Yan N, Rivard E, He G. Dibora[10]annulenes: Construction, Properties, and Their Ring-Opening Reactions. Org Lett 2018; 21:109-113. [DOI: 10.1021/acs.orglett.8b03538] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Weidong Zhang
- School of Science jointly with Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710049, China
| | - Demei Yu
- School of Science jointly with Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710049, China
| | - Zhijun Wang
- School of Science jointly with Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710049, China
| | - Bingjie Zhang
- School of Science jointly with Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710049, China
| | - Letian Xu
- School of Science jointly with Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710049, China
| | - Guoping Li
- School of Science jointly with Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710049, China
| | - Ni Yan
- Polymer Materials & Engineering Department, School of Materials Science & Engineering, Engineering Research Center of Transportation Materials, Ministry of Education, Chang’an University, Xi’an, Shaanxi 710064, China
| | - Eric Rivard
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G2G2, Canada
| | - Gang He
- School of Science jointly with Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710049, China
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18
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Schwarz M, Garnica M, Fasano F, Demitri N, Bonifazi D, Auwärter W. BN-Patterning of Metallic Substrates through Metal Coordination of Decoupled Borazines. Chemistry 2018; 24:9565-9571. [DOI: 10.1002/chem.201800849] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 04/13/2018] [Indexed: 12/27/2022]
Affiliation(s)
- Martin Schwarz
- Physics Department; Technical University of Munich; 85748 Garching Germany
| | - Manuela Garnica
- Physics Department; Technical University of Munich; 85748 Garching Germany
| | - Francesco Fasano
- School of Chemistry; Cardiff University; Park Place Main Building Cardiff CF10 3AT United Kingdom
| | - Nicola Demitri
- Elettra-Sincrotrone Trieste; S.S. 14 Km 163.5 in Area Science Park 34149 Basovizza, Trieste Italy
| | - Davide Bonifazi
- School of Chemistry; Cardiff University; Park Place Main Building Cardiff CF10 3AT United Kingdom
| | - Willi Auwärter
- Physics Department; Technical University of Munich; 85748 Garching Germany
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19
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Dasgupta R, Panda A, Pal S, Veetil Muhasina P, De S, Parameswaran P, Khan S. Catalyst free boron carbon bond cleavage and facile formation of five-membered PNBCC heterocycles. Dalton Trans 2017; 46:15190-15194. [PMID: 29068030 DOI: 10.1039/c7dt03565a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The [3 + 2] cycloaddition reaction of phosphanyl aminoborane [N(2,6-iPr2C6H3)(PPh2)(BCy2)] (1) with activated alkynes led to boron and phosphorus containing five-membered heterocycles [(2,6-iPr2C6H3)NPPh2(CO2R)C-C(Cy)(CO2R)(BCy)] [R = Me (2), Et (3) and H (4)] with facile cleavage of the B-C bond and concomitant formation of a P-C bond with an ylidic character. DFT calculations indicate that 1 can be considered as a non-conjugated 1,3-dipole having two reaction centers viz., a nucleophilic P-center and an electrophilic B-center. The reaction of 1 with the alkynes proceeds through a stepwise dipolar addition mechanism, followed by the migration of the cyclohexyl group from the B-atom to the adjacent C-atom.
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Affiliation(s)
- Rajarshi Dasgupta
- Indian Institute of Science Education and Research Pune, Dr. Homi Bhaba Road, Pashan, Pune - 411008, India.
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20
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Bélanger-Chabot G, Braunschweig H, Roy DK. Recent Developments in Azaborinine Chemistry. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700562] [Citation(s) in RCA: 138] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Guillaume Bélanger-Chabot
- Institute for Inorganic Chemistry; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
- Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Holger Braunschweig
- Institute for Inorganic Chemistry; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
- Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Dipak Kumar Roy
- Institute for Inorganic Chemistry; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
- Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
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21
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Marinelli D, Fasano F, Najjari B, Demitri N, Bonifazi D. Borazino-Doped Polyphenylenes. J Am Chem Soc 2017; 139:5503-5519. [DOI: 10.1021/jacs.7b01477] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Davide Marinelli
- School
of Chemistry, Cardiff University, Park Place Main Building, Cardiff CF10 3AT, United Kingdom
| | - Francesco Fasano
- School
of Chemistry, Cardiff University, Park Place Main Building, Cardiff CF10 3AT, United Kingdom
| | - Btissam Najjari
- Department
of Chemistry, University of Namur (UNamur), Rue de Bruxelles 61, Namur 5000, Belgium
| | - Nicola Demitri
- Elettra—Sincrotrone Trieste, S.S. 14 Km 163.5
in Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Davide Bonifazi
- School
of Chemistry, Cardiff University, Park Place Main Building, Cardiff CF10 3AT, United Kingdom
- Department
of Chemistry, University of Namur (UNamur), Rue de Bruxelles 61, Namur 5000, Belgium
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22
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Dosso J, Tasseroul J, Fasano F, Marinelli D, Biot N, Fermi A, Bonifazi D. Synthesis and Optoelectronic Properties of Hexa-peri
-hexabenzoborazinocoronene. Angew Chem Int Ed Engl 2017; 56:4483-4487. [DOI: 10.1002/anie.201700907] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Jacopo Dosso
- School of Chemistry; Cardiff University, Main Building; Park Place Cardiff CF10 3AT UK
| | - Jonathan Tasseroul
- Department of Chemistry; University of Namur (UNamur); Rue de Bruxelles 61 Namur 5000 Belgium
| | - Francesco Fasano
- School of Chemistry; Cardiff University, Main Building; Park Place Cardiff CF10 3AT UK
| | - Davide Marinelli
- School of Chemistry; Cardiff University, Main Building; Park Place Cardiff CF10 3AT UK
| | - Nicolas Biot
- School of Chemistry; Cardiff University, Main Building; Park Place Cardiff CF10 3AT UK
| | - Andrea Fermi
- School of Chemistry; Cardiff University, Main Building; Park Place Cardiff CF10 3AT UK
| | - Davide Bonifazi
- School of Chemistry; Cardiff University, Main Building; Park Place Cardiff CF10 3AT UK
- Department of Chemistry; University of Namur (UNamur); Rue de Bruxelles 61 Namur 5000 Belgium
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23
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Dosso J, Tasseroul J, Fasano F, Marinelli D, Biot N, Fermi A, Bonifazi D. Synthesis and Optoelectronic Properties of Hexa-peri
-hexabenzoborazinocoronene. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700907] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Jacopo Dosso
- School of Chemistry; Cardiff University, Main Building; Park Place Cardiff CF10 3AT UK
| | - Jonathan Tasseroul
- Department of Chemistry; University of Namur (UNamur); Rue de Bruxelles 61 Namur 5000 Belgium
| | - Francesco Fasano
- School of Chemistry; Cardiff University, Main Building; Park Place Cardiff CF10 3AT UK
| | - Davide Marinelli
- School of Chemistry; Cardiff University, Main Building; Park Place Cardiff CF10 3AT UK
| | - Nicolas Biot
- School of Chemistry; Cardiff University, Main Building; Park Place Cardiff CF10 3AT UK
| | - Andrea Fermi
- School of Chemistry; Cardiff University, Main Building; Park Place Cardiff CF10 3AT UK
| | - Davide Bonifazi
- School of Chemistry; Cardiff University, Main Building; Park Place Cardiff CF10 3AT UK
- Department of Chemistry; University of Namur (UNamur); Rue de Bruxelles 61 Namur 5000 Belgium
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24
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Riensch NA, Deniz A, Kühl S, Müller L, Adams A, Pich A, Helten H. Borazine-based inorganic–organic hybrid cyclomatrix microspheres by silicon/boron exchange precipitation polycondensation. Polym Chem 2017. [DOI: 10.1039/c7py01006k] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Borazine-based inorganic–organic hybrid cyclomatrix microspheres with a mean diameter of about 900 nm have been obtained via a novel silicon/boron exchange precipitation polycondensation approach.
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Affiliation(s)
- Nicolas A. Riensch
- Institute of Inorganic Chemistry
- RWTH Aachen University
- 52056 Aachen
- Germany
| | - Ayse Deniz
- DWI – Leibniz Institute for Interactive Materials
- 52056 Aachen
- Germany
| | - Sebastian Kühl
- DWI – Leibniz Institute for Interactive Materials
- 52056 Aachen
- Germany
| | - Lars Müller
- Institute of Inorganic Chemistry
- RWTH Aachen University
- 52056 Aachen
- Germany
| | - Alina Adams
- Institute of Technical and Macromolecular Chemistry
- RWTH Aachen University
- 52056 Aachen
- Germany
| | - Andrij Pich
- DWI – Leibniz Institute for Interactive Materials
- 52056 Aachen
- Germany
| | - Holger Helten
- Institute of Inorganic Chemistry
- RWTH Aachen University
- 52056 Aachen
- Germany
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25
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Srivastava AK, Pandey SK, Misra N. Stability versus aromaticity in mono-hydroxylated borazine, 1,2-azaborine and 1,3,2,4-diazadiborine. Mol Phys 2016. [DOI: 10.1080/00268976.2016.1145749] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | | | - Neeraj Misra
- Department of Physics, University of Lucknow, Lucknow, India
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26
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Wakamiya A, Yamaguchi S. Designs of Functional π-Electron Materials based on the Characteristic Features of Boron. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2015. [DOI: 10.1246/bcsj.20150151] [Citation(s) in RCA: 193] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
| | - Shigehiro Yamaguchi
- Department of Chemistry, Graduate School of Science, and Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University
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27
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Bonifazi D, Fasano F, Lorenzo-Garcia MM, Marinelli D, Oubaha H, Tasseroul J. Boron-nitrogen doped carbon scaffolding: organic chemistry, self-assembly and materials applications of borazine and its derivatives. Chem Commun (Camb) 2015; 51:15222-36. [PMID: 26411675 DOI: 10.1039/c5cc06611e] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Discovered by Stock and Pohland in 1926, borazine is the isoelectronic and isostructural inorganic analogue of benzene, where the C[double bond, length as m-dash]C bonds are substituted by B-N bonds. The strong polarity of such heteroatomic bonds widens the HOMO-LUMO gap of the molecule, imparting strong UV-emitting/absorption and electrical insulating properties. These properties make borazine and its derivatives valuable molecular scaffolds to be inserted as doping units in graphitic-based carbon materials to tailor their optoelectronic characteristics, and specifically their semiconducting properties. By guiding the reader through the most significant examples in the field, in this feature paper we describe the past and recent developments in the organic synthesis and functionalisation of borazine and its derivatives. These boosted the production of a large variety of tailored derivatives, broadening their use in optoelectronics, H2 storage and supramolecular functional architectures, to name a few.
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Affiliation(s)
- Davide Bonifazi
- Namur Research College (NARC) and Department of Chemistry, University of Namur (UNamur), Rue de Bruxelles 61, Namur, 5000, Belgium.
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28
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Zhang Z, Edkins RM, Nitsch J, Fucke K, Eichhorn A, Steffen A, Wang Y, Marder TB. D-π-A triarylboron compounds with tunable push-pull character achieved by modification of both the donor and acceptor moieties. Chemistry 2014; 21:177-90. [PMID: 25413782 DOI: 10.1002/chem.201405621] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Indexed: 11/07/2022]
Abstract
The push-pull character of a series of donor-bithienyl-acceptor compounds has been tuned by adopting triphenylamine or 1,1,7,7-tetramethyljulolidine as a donor and B(2,6-Me2 -4-RC6 H2)2 (R=Me, C6 F5 or 3,5-(CF3)2 C6 H3) or B[2,4,6-(CF3 )3 C6 H2]2 as an acceptor. Ir-catalyzed C-H borylation was utilized in the derivatization of the boryl acceptors and the tetramethyljulolidine donor. The donor and acceptor strengths were evaluated by electrochemical and photophysical measurements. In solution, the compound with the strongest acceptor, B[2,4,6-(CF3)3 C6 H2]2 ((FMes)2 B), has strongly quenched emission, while all other compounds show efficient green to red (ΦF =0.80-1.00) or near-IR (NIR; ΦF =0.27-0.48) emission, depending on solvent. Notably, this study presents the first examples of efficient NIR emission from three-coordinate boron compounds. Efficient solid-state red emission was observed for some derivatives, and interesting aggregation-induced emission of the (FMes)2 B-containing compound was studied. Moreover, each compound showed a strong and clearly visible response to fluoride addition, with either a large emission-color change or turn-on fluorescence.
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Affiliation(s)
- Zuolun Zhang
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg (Germany)
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29
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Zhang Z, Edkins RM, Nitsch J, Fucke K, Steffen A, Longobardi LE, Stephan DW, Lambert C, Marder TB. Optical and electronic properties of air-stable organoboron compounds with strongly electron-accepting bis(fluoromesityl)boryl groups. Chem Sci 2014; 6:308-321. [PMID: 28966759 PMCID: PMC5586071 DOI: 10.1039/c4sc02410a] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 10/01/2014] [Indexed: 12/21/2022] Open
Abstract
R–Ph–B(FMes)2 compounds exhibit low reduction potentials, bright emission, a TICT state and unusual long-lived phosphorescence at low temperature.
Three compounds with phenyl (1), 4-tert-butylphenyl (2) and 4-N,N-diphenylaminophenyl (3) groups attached to bis(fluoromesityl)boryl ((FMes)2B) through B–C bonds have been prepared. The restricted rotation about the B–C bonds of boron-bonded aryl rings in solution has been studied by variable-temperature 19F NMR spectroscopy, and through-space F–F coupling has been observed for 3 at low temperature. Steric congestion inhibits binding of 1 by Lewis bases DABCO and tBu3P and the activation of H2 in their presence. Photophysical and electrochemical studies have been carried out on 2, 3, and an analogue of 3 containing a bis(mesityl)boryl ((Mes)2B) group, namely 4. Both 2 and 3 show bright emission in nonpolar solvents and in the solid-state, very strong electron-accepting ability as measured by cyclic voltammetry, and good air-stability. In addition, 2 displayed unusually long-lived emission (τ = 2.47 s) in 2-MeTHF at 77 K. The much stronger acceptor strength of (FMes)2B than (Mes)2B leads to significantly red-shifted emission in solution and the solid state, stronger emission solvatochromism, and significantly lower reduction potentials. Theoretical calculations confirm that 2 and 3 tend to form highly twisted excited states with good conjugation between one FMes group and the boron atom, which correlate well with their blue-shifted solid-state emissions and low kr values in solution.
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Affiliation(s)
- Zuolun Zhang
- 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 .
| | - Jörn Nitsch
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Katharina Fucke
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany . .,School of Medicine , Pharmacy and Health , Durham University , University Boulevard , Stockton-on-Tees , TS17 6BH , UK
| | - Andreas Steffen
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Lauren E Longobardi
- Department of Chemistry , University of Toronto , 80 St. George St. , Toronto , Ontario M5S 3H6 , Canada
| | - Douglas W Stephan
- Department of Chemistry , University of Toronto , 80 St. George St. , Toronto , Ontario M5S 3H6 , Canada
| | - Christoph Lambert
- Institut für Organische 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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30
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Kalashnyk N, Ganesh Nagaswaran P, Kervyn S, Riello M, Moreton B, Jones TS, De Vita A, Bonifazi D, Costantini G. Self-assembly of decoupled borazines on metal surfaces: the role of the peripheral groups. Chemistry 2014; 20:11856-62. [PMID: 25079120 PMCID: PMC4449113 DOI: 10.1002/chem.201402839] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2014] [Indexed: 11/11/2022]
Abstract
Two borazine derivatives have been synthesised to investigate their self-assembly behaviour on Au(111) and Cu(111) surfaces by scanning tunnelling microscopy (STM) and theoretical simulations. Both borazines form extended 2D networks upon adsorption on both substrates at room temperature. Whereas the more compact triphenyl borazine 1 arranges into close-packed ordered molecular islands with an extremely low density of defects on both substrates, the tris(phenyl-4-phenylethynyl) derivative 2 assembles into porous molecular networks due to its longer lateral substituents. For both species, the steric hindrance between the phenyl and mesityl substituents results in an effective decoupling of the central borazine core from the surface. For borazine 1, this is enough to weaken the molecule-substrate interaction, so that the assemblies are only driven by attractive van der Waals intermolecular forces. For the longer and more flexible borazine 2, a stronger molecule-substrate interaction becomes possible through its peripheral substituents on the more reactive copper surface.
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Affiliation(s)
- Nataliya Kalashnyk
- Department of Chemistry, University of WarwickGibbet Hill Road, Coventry, CV4 7AL (UK)
| | - Praveen Ganesh Nagaswaran
- Namur Research College (NARC) and Department of Chemistry, University of Namur (UNamur)Rue de Bruxelles 61, 5000 Namur (Belgium)
| | - Simon Kervyn
- Namur Research College (NARC) and Department of Chemistry, University of Namur (UNamur)Rue de Bruxelles 61, 5000 Namur (Belgium)
| | - Massimo Riello
- Physics Department, King's College LondonLondon, WC2R 2LS (UK)
| | - Ben Moreton
- Department of Chemistry, University of WarwickGibbet Hill Road, Coventry, CV4 7AL (UK)
| | - Tim S Jones
- Department of Chemistry, University of WarwickGibbet Hill Road, Coventry, CV4 7AL (UK)
| | | | - Davide Bonifazi
- Namur Research College (NARC) and Department of Chemistry, University of Namur (UNamur)Rue de Bruxelles 61, 5000 Namur (Belgium)
- Department of Pharmaceutical and Chemical Sciences and INSTM UdR Trieste, University of TriestePiazzale Europa 1, 34127 Trieste (Italy)
| | - Giovanni Costantini
- Department of Chemistry, University of WarwickGibbet Hill Road, Coventry, CV4 7AL (UK)
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31
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Molander GA, Wisniewski SR. Accessing molecularly complex azaborines: palladium-catalyzed Suzuki-Miyaura cross-couplings of brominated 2,1-borazaronaphthalenes and potassium organotrifluoroborates. J Org Chem 2014; 79:6663-78. [PMID: 24984003 PMCID: PMC4104828 DOI: 10.1021/jo5011894] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
![]()
Despite
their potential applications in both medicinal chemistry
and materials science, there have been limited reports on the functionalization
of 2,1-borazaronaphthalenes since their discovery in 1959. To access
new chemical space and build molecular complexity, the Suzuki–Miyaura
cross-coupling of brominated 2,1-borazaronaphthalenes has been investigated.
The palladium-catalyzed cross-coupling proceeds with an array of potassium
(hetero)aryltrifluoroborates in high yield with low catalyst loadings
under mild reaction conditions. By the use of a high-yielding bromination
of various 2,1-borazaronaphthalenes to generate electrophilic azaborine
species, a library of 3-(hetero)aryl and 3,6-diaryl-2,1-borazaronaphthalenes
has been synthesized.
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Affiliation(s)
- Gary A Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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32
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Holzmeier F, Lang M, Hemberger P, Bodi A, Schäfer M, Dewhurst RD, Braunschweig H, Fischer I. Photoionization and pyrolysis of a 1,4-azaborinine: retro-hydroboration in the cation and identification of novel organoboron ring systems. Chemistry 2014; 20:9683-92. [PMID: 24976576 DOI: 10.1002/chem.201402884] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Indexed: 12/30/2022]
Abstract
The photoionization and dissociative photoionization of 1,4-di-tert-butyl-1,4-azaborinine by means of synchrotron radiation and threshold photoelectron photoion coincidence spectroscopy is reported. The ionization energy of the compound was determined to be 7.89 eV. Several low-lying electronically excited states in the cation were identified. The various pathways for dissociative photoionization were modeled by statistical theory, and appearance energies AE0K were obtained. The loss of isobutene in a retro-hydroboration reaction is the dominant pathway, which proceeds with a reverse barrier. Pyrolysis of the parent compound in a chemical reactor leads to the generation of several yet unobserved boron compounds. The ionization energies of the C4 H6 BN isomers 1,2- and 1,4-dihydro-1,4-azaborinine and the C3 H6 BN isomer 1,2-dihydro-1,3-azaborole were determined from threshold photoelectron spectra.
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Affiliation(s)
- Fabian Holzmeier
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg (Germany)
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33
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Braunschweig H, Hörl C, Mailänder L, Radacki K, Wahler J. Antiaromaticity to aromaticity: from boroles to 1,2-azaborinines by ring expansion with azides. Chemistry 2014; 20:9858-61. [PMID: 24964998 DOI: 10.1002/chem.201403101] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Indexed: 11/11/2022]
Abstract
We have exploited the reactivity of antiaromatic boroles, gaining access to aryl-substituted monocyclic 1,2-azaborinines. The observed ring-expansion reaction of inherently electron-deficient boroles with organometallic and organic azides is demonstrated for representative examples. This substance class is expected to provide a new avenue into 1,2-azaborinine chemistry, especially in the area of functional organoboron materials. Our results are based on NMR and UV/Vis spectroscopy as well as single-crystal X-ray crystallography and provide a virtually quantitative approach that also offers numerous points of variation.
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Affiliation(s)
- Holger Braunschweig
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg (Germany) http://www-anorganik.ak-braunschweig.chemie.uni-wuerzburg.de/.
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34
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Kervyn S, Kalashnyk N, Riello M, Moreton B, Tasseroul J, Wouters J, Jones TS, De Vita A, Costantini G, Bonifazi D. “Magic” Surface Clustering of Borazines Driven by Repulsive Intermolecular Forces. Angew Chem Int Ed Engl 2013; 52:7410-4. [DOI: 10.1002/anie.201300948] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Revised: 04/05/2013] [Indexed: 11/11/2022]
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35
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Kervyn S, Kalashnyk N, Riello M, Moreton B, Tasseroul J, Wouters J, Jones TS, De Vita A, Costantini G, Bonifazi D. “Magic” Surface Clustering of Borazines Driven by Repulsive Intermolecular Forces. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201300948] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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36
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Kervyn S, Fenwick O, Di Stasio F, Shin YS, Wouters J, Accorsi G, Osella S, Beljonne D, Cacialli F, Bonifazi D. Polymorphism, fluorescence, and optoelectronic properties of a borazine derivative. Chemistry 2013; 19:7771-9. [PMID: 23616404 DOI: 10.1002/chem.201204598] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2012] [Indexed: 11/06/2022]
Abstract
We have prepared a new borazine derivative that bears mesityl substituents at the boron centers and displays exceptional chemical stability. Detailed crystallographic and solid-state fluorescence characterizations revealed the existence of several polymorphs, each of which showed different emission profiles. In particular, a bathochromic shift is observed when going from the lower- to the higher-density crystal. Computational investigations of the conformational dynamics of borazine 1 in both the gas phase and in the solid state using molecular dynamics (MD) simulations showed that the conformation of the peripheral aryl groups significantly varies when going from an isolated molecule (in which the rings are able to flip over the 90° barrier at RT) to the crystals (in which the rotation is locked by packing effects), thus generating specific nonsymmetric intermolecular interactions in the different polymorphs. To investigate the optoelectronic properties of these materials by fabrication and characterization of light-emitting diodes (LEDs) and light-emitting electrochemical cells (LECs), borazine 1 was incorporated as the active material in the emissive layer. The current and radiance versus voltage characteristics, as well as the electroluminescence spectra reported here for the first time are encouraging prospects for the engineering of future borazine-based devices.
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Affiliation(s)
- Simon Kervyn
- Department of Chemistry and Namur Research College (NARC), University of Namur (UNamur), Rue de Bruxelles 61, Namur, 5000, Belgium
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37
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Liu T, Yu Y, Chen S, Li Y, Liu H. Self-assembly of a tripyrenylboron molecule towards solid sensor for fluoride anions. RSC Adv 2013. [DOI: 10.1039/c3ra41102h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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38
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Kervyn S, Nakanishi T, Aimi J, Saeki A, Seki S, Champagne B, Bonifazi D. Nanostructured Cocrystals of a Borazine with [60]Fullerene. CHEM LETT 2012. [DOI: 10.1246/cl.2012.1210] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Simon Kervyn
- Namur Research College (NARC) and Department of Chemistry, University of Namur (FUNDP)
| | | | - Junko Aimi
- National Institute for Materials Science (NIMS)
| | - Akinori Saeki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University
| | - Shu Seki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University
| | - Benoît Champagne
- Laboratory of Theoretical Chemistry, University of Namur (FUNDP)
| | - Davide Bonifazi
- Namur Research College (NARC) and Department of Chemistry, University of Namur (FUNDP)
- Department of Pharmaceutical and Chemical Sciences, University of Trieste
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39
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Chang CW, Nabae Y, Kuroki S, Hayakawa T, Kakimoto MA, Miyata S. Carbon-based Cathode Materials Doped with a New Borazine Compound for Electrochemical Oxygen Reduction. CHEM LETT 2012. [DOI: 10.1246/cl.2012.923] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Cha Wen Chang
- Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology
| | - Yuta Nabae
- Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology
| | - Shigeki Kuroki
- Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology
| | - Teruaki Hayakawa
- Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology
| | - Masa-aki Kakimoto
- Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology
| | - Seizo Miyata
- Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology
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40
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Chen P, Lalancette RA, Jäkle F. π-Expanded Borazine: An Ambipolar Conjugated B-π-N Macrocycle. Angew Chem Int Ed Engl 2012; 51:7994-8. [DOI: 10.1002/anie.201203788] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Indexed: 11/11/2022]
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41
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Chen P, Lalancette RA, Jäkle F. π-Expanded Borazine: An Ambipolar Conjugated B-π-N Macrocycle. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201203788] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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42
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Martens SC, Riehm T, Wadepohl H, Gade LH. Tetra‐
N
‐silylated Bis(borylene)tetraaminoperylenes (“DIBOTAPs”): Synthesis, Structures and Photophysics. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200210] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Susanne C. Martens
- Anorganisch‐Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Till Riehm
- Anorganisch‐Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Hubert Wadepohl
- Anorganisch‐Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Lutz H. Gade
- Anorganisch‐Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
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43
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Sun GY, Wu SX, Geng Y, Li HB, Wu Y, Su ZM. Toward design of high-performance optoelectronic materials: comparative theoretical studies on the photophysical and charge transport properties of fluorene-based compounds. Theor Chem Acc 2012. [DOI: 10.1007/s00214-012-1176-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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44
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Jackson KT, Reich TE, El-Kaderi HM. Targeted synthesis of a porous borazine-linked covalent organic framework. Chem Commun (Camb) 2012; 48:8823-5. [DOI: 10.1039/c2cc33583b] [Citation(s) in RCA: 161] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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45
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Herrero‐García N, Fernández I, Osío Barcina J. Electron Delocalization in Homoconjugated 7,7‐Diarylnorbornane Systems: A Computational and Experimental Study. Chemistry 2011; 17:7327-35. [DOI: 10.1002/chem.201003511] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Revised: 01/06/2011] [Indexed: 11/08/2022]
Affiliation(s)
- Noelia Herrero‐García
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid (Spain), Fax: (+34) 91‐3944103
| | - Israel Fernández
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid (Spain), Fax: (+34) 91‐3944103
| | - José Osío Barcina
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid (Spain), Fax: (+34) 91‐3944103
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46
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Tanaka N, Mizoshita N, Maegawa Y, Tani T, Inagaki S, Jorapur YR, Shimada T. Synthesis of a spirobifluorene-bridged allylsilane precursor for periodic mesoporous organosilica. Chem Commun (Camb) 2011; 47:5025-7. [DOI: 10.1039/c0cc05823h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Reich TE, Jackson KT, Li S, Jena P, El-Kaderi HM. Synthesis and characterization of highly porous borazine-linked polymers and their performance in hydrogen storage application. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11455g] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Jackson KT, Rabbani MG, Reich TE, El-Kaderi HM. Synthesis of highly porous borazine-linked polymers and their application to H2, CO2, and CH4 storage. Polym Chem 2011. [DOI: 10.1039/c1py00374g] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Abstract
The present review deals with the preparation and the properties of star-shaped conjugated compounds. Three, four or six conjugated arms are attached to cross-conjugated cores, which consist of single atoms (B, C+, N), benzene or azine rings or polycyclic ring systems, as for example triphenylene or tristriazolotriazine. Many of these shape-persistent [n]star compounds tend to π-stacking and self-organization, and exhibit interesting properties in materials science: Linear and non-linear optics, electrical conductivity, electroluminescence, formation of liquid crystalline phases, etc.
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50
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Riehm T, Wadepohl H, Gade LH. Putting group 13 elements onto perylenes: highly fluorescent N-B-N- and N-Al-N-substituted polycyclic aromatics. Inorg Chem 2009; 47:11467-9. [PMID: 19007210 DOI: 10.1021/ic8017453] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Metalation of 3,4,9,10-tetraaminoperylene with boron and aluminum complex fragments has given rise to a new class of highly fluorescent N-B-N- and N-Al-N-substituted dyes with fluorescence quantum yields of up to 82%.
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Affiliation(s)
- Till Riehm
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
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