1
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Gayen S, Shyamal S, Mohapatra S, Antharjanam PKS, Ghosh S. B-P Coupling: Metal Stabilized Phosphinoborate Complexes. Chemistry 2024; 30:e202302362. [PMID: 38009462 DOI: 10.1002/chem.202302362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 10/28/2023] [Accepted: 11/20/2023] [Indexed: 11/28/2023]
Abstract
In an effort to establish B-P coupling reactions without the use of phosphine-borane dehydrocoupling agent, we have developed a new synthetic methodology employing group 8 metal σ-borate complex [{κ3 -H,S,S'-BH2 L2 }Ru{κ3 -H,H,S-BH3 L}] (L=NC5 H4 S), 1. Treatment of 1 with chlorodiphenyl phosphine (PPh2 Cl) yielded 1,5-P,S chelated Ru-dihydridoborate species [PPh2 H{κ3 -H,H,S-BH(OH)L}Ru{κ2 -P,S-(Ph2 P)BH2 L}], 2. The insertion of phosphine moiety (PPh2 ) by the cleavage of 3c-2e σ(Ru… H-B) bonding interaction led to the formation of B-P bond. The κ2 -P,S chelated six-membered ring adopted a boat conformation in complex 2. The heterocycle is made of all different atoms, which is one of the rarest examples of heteroatomic ring systems. Theoretical outcomes demonstrated the electronic insight of B-P coupling and stabilization through transition metal. In order to explore an alternate route of B-P bond formation, we have further explored the reaction of 1 and Ru-bis(dihydridoborate) complex, 5 with secondary phosphine oxide (SPO). Although, thermolysis of 1 with diphenylphosphine oxide yielded analogous σ-borate complex 3, the similar reaction of 5 at room temperature led to the formation of novel phosphinous(III) acid incorporated Ru(σ-borate)(dihydridoborate) complex, 6. In a similar fashion, the reaction of 5 with phosphite ligand generated Ru(σ-borate)(dihydridoborate) complex, 7, which is analogous to 6.
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Affiliation(s)
- Sourav Gayen
- Department of Chemistry, Indian Institution of Technology, Madras, Chennai, 600036, India
| | - Sampad Shyamal
- Department of Chemistry, Indian Institution of Technology, Madras, Chennai, 600036, India
| | - Stutee Mohapatra
- Department of Chemistry, Indian Institution of Technology, Madras, Chennai, 600036, India
| | | | - Sundargopal Ghosh
- Department of Chemistry, Indian Institution of Technology, Madras, Chennai, 600036, India
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2
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Lin H, Yang X, Liu SY, Jäkle F. Ring-Opening Metathesis Polymerization of the Dewar Isomer of 1,2-Azaborinine, a B-N Isostere of Benzene. ACS Macro Lett 2024; 13:21-27. [PMID: 38095183 PMCID: PMC10842419 DOI: 10.1021/acsmacrolett.3c00601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2024]
Abstract
The successful polymerization of the Dewar isomer of an azaborinine heterocycle is reported. Controlled ring-opening metathesis polymerization was accomplished with Grubbs and Hoveya-Grubbs second generation catalysts (G2, HG2), as well as a Z-selective Ru catalyst (HGM2001). The structure of the polymers containing 4-membered B-N heterocycles was verified by GPC and multinuclear and 2D NMR. Differences in stereochemistry of polymers derived from G2/HG2 versus the Z-selective catalyst HGM2001 were substantiated by 2D NOESY, FT-IR, and Raman analyses. The incorporation of B-N heterocycles into these polymer structures is promising as a route to functional polymers that contain polar side groups.
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Affiliation(s)
- Huina Lin
- Department of Chemistry, Rutgers University - Newark, Newark, New Jersey 07102, United States
| | - Xinyu Yang
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02135, United States
| | - Shih-Yuan Liu
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02135, United States
| | - Frieder Jäkle
- Department of Chemistry, Rutgers University - Newark, Newark, New Jersey 07102, United States
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3
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Xu J, Qiu W, Zhang X, Wu Z, Zhang Z, Yang K, Song Q. Palladium-Catalyzed Atroposelective Kinetic C-H Olefination and Allylation for the Synthesis of C-B Axial Chirality. Angew Chem Int Ed Engl 2023; 62:e202313388. [PMID: 37840007 DOI: 10.1002/anie.202313388] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/11/2023] [Accepted: 10/13/2023] [Indexed: 10/17/2023]
Abstract
The direct C-H functionalization of 1,2-benzazaborines, especially asymmetric version, remains a great challenge. Here we report a palladium-catalyzed enantioselective C-H olefination and allylation reactions of 1,2-benzazaborines. This asymmetric approach is a kinetic resolution (KR), providing various C-B axially chiral 2-aryl-1,2-benzazaborines and 3-substituted 2-aryl-1,2-benzazaborines in generally high yields with excellent enantioselectivities (selectivity (S) factor up to 354). The synthetic potential of this reaction is showcased by late-stage modification of complex molecules, scale-up reaction, and applications.
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Affiliation(s)
- Jie Xu
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Weihua Qiu
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Xu Zhang
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Zhihan Wu
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Zhen Zhang
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Kai Yang
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Qiuling Song
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, China
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4
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Gliese PJ, Appiarius Y, Scheele T, Lork E, Neudecker T, Staubitz A. Synthesis and crystal structure of 2-(anthracen-9-yl)-1-( tert-butyl-dimethyl-sil-yl)-3,6-di-hydro-1λ 4,2λ 4-aza-borinine. Acta Crystallogr E Crystallogr Commun 2023; 79:1012-1016. [PMID: 37936862 PMCID: PMC10626957 DOI: 10.1107/s2056989023008381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 09/23/2023] [Indexed: 11/09/2023]
Abstract
The title compound, C24H30BNSi (I), is an asymmetric 1,2,3,6-tetra-hydro-1,2-aza-borinine consisting of a BN-substituted cyclo-hexa-diene analog with a B-anthracenyl substituent. A ring-closing metathesis with subsequent substitution of the obtained BCl 1,2-aza-borinine using anthracenyl lithium yielded the title compound I. The asymmetric unit (Z = 8) belongs to the ortho-rhom-bic space group Pbca and shows an elongated N-C bond compared to previously reported BN-1,4-cyclo-hexa-diene [Abbey et al. (2008 ▸) J. Am. Chem. Soc. 130, 7250-7252]. The primarily contributing surface inter-actions are H⋯H and C⋯H/H⋯C (as elucidated by Hirshfeld surface analysis) which are dominated by van der Waals forces. Moreover, the non-aromatic BN heterocycle and the protecting group exhibit intra- and inter-molecular C-H⋯π inter-actions, respectively, with the anthracenyl substituent.
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Affiliation(s)
- Philipp J. Gliese
- University of Bremen, Institute for Organic and Analytical Chemistry, 28359 Bremen, Germany
- University of Bremen, MAPEX Center for Materials and Processes, 28359 Bremen, Germany
| | - Yannik Appiarius
- University of Bremen, Institute for Organic and Analytical Chemistry, 28359 Bremen, Germany
- University of Bremen, MAPEX Center for Materials and Processes, 28359 Bremen, Germany
| | - Tarek Scheele
- University of Bremen, Institute for Physical and Theoretical Chemistry, 28359 Bremen, Germany
| | - Enno Lork
- University of Bremen, Institute for Inorganic Chemistry and Crystallography, 28359 Bremen, Germany
| | - Tim Neudecker
- University of Bremen, MAPEX Center for Materials and Processes, 28359 Bremen, Germany
- University of Bremen, Institute for Physical and Theoretical Chemistry, 28359 Bremen, Germany
- Bremen Center for Computational Materials Science, 28359 Bremen, Germany
| | - Anne Staubitz
- University of Bremen, Institute for Organic and Analytical Chemistry, 28359 Bremen, Germany
- University of Bremen, MAPEX Center for Materials and Processes, 28359 Bremen, Germany
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5
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Señorans S, Valencia I, Merino E, Iglesias M, Fernández-Rodríguez MA, Maya EM. Hyper-Cross-Linked Porous Polymer Featuring B-N Covalent Bonds (HCP-BNs): A Stable and Efficient Metal-Free Heterogeneous Photocatalyst. ACS Macro Lett 2023:949-954. [PMID: 37384421 DOI: 10.1021/acsmacrolett.3c00217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/01/2023]
Abstract
The first example of a porous polymer containing B-N covalent bonds, prepared from a tetraphene B-N monomer and biphenyl as a comonomer, is reported. It was prepared using the solvent knitting strategy, which allows the connection between the aromatic rings of the two monomers through methylene groups provided by an external cross-linking agent. The new polymer exhibited micromeso porosity with an SBET of 612 m2/g, high thermal stability, and potential properties as a heterogeneous photocatalyst, since it is very active in the aza-Henry coupling reaction (>98% of conversion and selectivity). After the first run, the catalyst improves its photocatalytic activity, shortening the reaction time to only 2 h and maintaining this activity in successive runs. The presence of a radical in this structure that remains stable with successive runs makes it a new type of material with potential applications as a highly stable and efficient photocatalyst.
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Affiliation(s)
- Sara Señorans
- Department of Frontiers in Materials Chemistry, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz, 3, Cantoblanco, Madrid 28049, Spain
| | - Isabel Valencia
- Universidad de Alcalá (IRYCIS), Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación Química "Andrés M. del Río" (IQAR), Campus Científico-Tecnológico, Facultad de Farmacia, Autovía A-II, Km 33.1, 28805-Alcalá de Henares, Madrid, Spain
| | - Estíbaliz Merino
- Universidad de Alcalá (IRYCIS), Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación Química "Andrés M. del Río" (IQAR), Campus Científico-Tecnológico, Facultad de Farmacia, Autovía A-II, Km 33.1, 28805-Alcalá de Henares, Madrid, Spain
| | - Marta Iglesias
- Department of Frontiers in Materials Chemistry, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz, 3, Cantoblanco, Madrid 28049, Spain
| | - Manuel A Fernández-Rodríguez
- Universidad de Alcalá (IRYCIS), Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación Química "Andrés M. del Río" (IQAR), Campus Científico-Tecnológico, Facultad de Farmacia, Autovía A-II, Km 33.1, 28805-Alcalá de Henares, Madrid, Spain
| | - Eva M Maya
- Department of Frontiers in Materials Chemistry, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz, 3, Cantoblanco, Madrid 28049, Spain
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6
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Zhang Y, Li W, Jiang R, Zhang L, Li Y, Xu X, Liu X. Synthetic Doping of Acenaphthylene through BN/CC Isosterism and a Direct Comparison with BN-Acenaphthene. J Org Chem 2022; 87:12986-12996. [PMID: 36149831 DOI: 10.1021/acs.joc.2c01534] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Boron/nitrogen-doped acenaphthylenes, a new class of BN-doped cyclopenta-fused polycyclic aromatic hydrocarbons, were synthesized via indole-directed C-H borylation. The reference molecule BN-acenaphthene was also synthesized in a similar manner. Both BN-acenaphthylene and BN-acenaphthene were unequivocally characterized by single-crystal X-ray analysis. The aromaticities of each ring in BN-acenaphthylenes were quantified by experimental and theoretical methods. Moreover, doping the BN unit into acenaphthylene can increase the LUMO level and decrease the HOMO level, resulting in wider HOMO-LUMO energy gaps. Furthermore, regioselective bromination of BN-acenaphthylene (B-Mes) afforded monobrominated BN-acenaphthylene in good yield. Subsequently, cross-coupling of brominated BN-acenaphthylene gave a series of BN-acenaphthylene derivatives. In addition, the photophysical properties of these BN-acenaphthylene derivatives can be fine-tuned by the substituents on the BN-acenaphthylene scaffold.
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Affiliation(s)
- Yanli Zhang
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People's Republic of China
| | - Wenlong Li
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People's Republic of China
| | - Ruijun Jiang
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People's Republic of China
| | - Lei Zhang
- School of Science, Tianjin Chengjian University, Tianjin 300384, People's Republic of China
| | - Yuanhao Li
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People's Republic of China
| | - Xiaoyang Xu
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People's Republic of China
| | - Xuguang Liu
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, 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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7
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Appiarius Y, Staubitz A. Azaborinine. CHEM UNSERER ZEIT 2022. [DOI: 10.1002/ciuz.202100061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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8
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Kanazawa T, Nishikawa T, Ouchi M. Orthogonal C-B Bond Transformation as an Approach for Versatile Synthesis of End-Functionalized Polymers. ACS Macro Lett 2022; 11:706-710. [PMID: 35570803 DOI: 10.1021/acsmacrolett.2c00207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Conventionally inaccessible end-functionalized vinyl polymers were synthesized via orthogonal side-chain replacement for terminal and repeating units of poly(alkenyl boronate)s. A terminal-defined polymer of isopropenyl boronic acid pinacol ester (IPBpin) was synthesized via RAFT polymerization, and subsequent cobalt (Co)-catalyzed end olefination afforded the polymer carrying the C(sp2)-B bond at the terminal and the C(sp3)-B bond in repeating units. Herein, the terminal C(sp2)-B bond was selectively transformable via palladium (Pd)-catalyzed Suzuki-Miyaura cross coupling, and subsequent transformation of the repeating C(sp3)-B unit gave the poly(α-methyl vinyl alcohol) [poly(MVA)] bearing various functional groups at the terminal. The boron-based stepwise polymer reaction thus overcame the synthetic difficulty of the end-functionalized poly(MVA), which is ascribed to the poor polymerization ability of the corresponding acetate monomer, i.e., isopropenyl acetate.
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Affiliation(s)
- Tomoaki Kanazawa
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Tsuyoshi Nishikawa
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Makoto Ouchi
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
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9
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Appiarius Y, Gliese PJ, Segler SAW, Rusch P, Zhang J, Gates PJ, Pal R, Malaspina LA, Sugimoto K, Neudecker T, Bigall NC, Grabowsky S, Bakulin AA, Staubitz A. BN-Substitution in Dithienylpyrenes Prevents Excimer Formation in Solution and in the Solid State. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:4563-4576. [PMID: 35299818 PMCID: PMC8919264 DOI: 10.1021/acs.jpcc.1c08812] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 12/20/2021] [Indexed: 06/14/2023]
Abstract
Boron-nitrogen substitutions in polycyclic aromatic hydrocarbons (PAHs) have a strong impact on the optical properties of the molecules due to a significantly more heterogeneous electron distribution. However, besides these single-molecule properties, the observed optical properties of PAHs critically depend on the degree of intermolecular interactions such as π-π-stacking, dipolar interactions, or the formation of dimers in the excited state. Pyrene is the most prominent example showing the latter as it exhibits a broadened and strongly bathochromically shifted emission band at high concentrations in solution compared to the respective monomers. In the solid state, the impact of intermolecular interactions is even higher as it determines the crystal packing crucially. In this work, a thiophene-flanked BN-pyrene (BNP) was synthesized and compared with its all-carbon analogue (CCP) in solution and in the solid state by means of crystallography, NMR spectroscopy, UV-vis spectroscopy, and photoluminescence (PL) spectroscopy. In solution, PL spectroscopy revealed the solvent-dependent presence of excimers of CCP at high concentrations. In contrast, no excimers were found in BNP. Clear differences were also observed in the single-crystal packing motifs. While CCP revealed overlapped pyrene planes with centroid distances in the range of classical π-stacking interactions, the BNP scaffolds were displaced and significantly more spatially separated.
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Affiliation(s)
- Yannik Appiarius
- Institute
for Analytical and Organic Chemistry, University
of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
- MAPEX
Center for Materials and Processes, University
of Bremen, Bibliothekstraße
1, D-28359 Bremen, Germany
| | - Philipp J. Gliese
- Institute
for Analytical and Organic Chemistry, University
of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
- MAPEX
Center for Materials and Processes, University
of Bremen, Bibliothekstraße
1, D-28359 Bremen, Germany
| | - Stephan A. W. Segler
- Institute
for Analytical and Organic Chemistry, University
of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
- MAPEX
Center for Materials and Processes, University
of Bremen, Bibliothekstraße
1, D-28359 Bremen, Germany
| | - Pascal Rusch
- Institute
of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstraße 3a, D-30167 Hannover, Germany
- Cluster
of Excellence PhoenixD (Photonics, Optics, and Engineering—Innovation
Across Disciplines), Leibniz University
Hannover, D-30167 Hannover, Germany
| | - Jiangbin Zhang
- Cavendish
Laboratory, University of Cambridge, 19 J J Thomson Avenue, CB3 0HE Cambridge, U.K.
- College of
Advanced Interdisciplinary Studies, National
University of Defense Technology, 410073 Changsha, Hunan, China
| | - Paul J. Gates
- School
of Chemistry, University of Bristol, Cantock’s Close, BS8 1TS Bristol, U.K.
| | - Rumpa Pal
- Institute
of Inorganic Chemistry and Crystallography, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
| | - Lorraine A. Malaspina
- Institute
of Inorganic Chemistry and Crystallography, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
- Department
of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Kunihisa Sugimoto
- Japan Synchrotron
Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Hyogo 679-5198, Japan
| | - Tim Neudecker
- MAPEX
Center for Materials and Processes, University
of Bremen, Bibliothekstraße
1, D-28359 Bremen, Germany
- Institute for Physical and Theoretical
Chemistry, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
- Bremen Center for Computational Materials
Science, University of Bremen, Am Fallturm 1, D-28359 Bremen, Germany
| | - Nadja C. Bigall
- Institute
of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstraße 3a, D-30167 Hannover, Germany
- Cluster
of Excellence PhoenixD (Photonics, Optics, and Engineering—Innovation
Across Disciplines), Leibniz University
Hannover, D-30167 Hannover, Germany
| | - Simon Grabowsky
- Institute
of Inorganic Chemistry and Crystallography, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
- Department
of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Artem A. Bakulin
- Cavendish
Laboratory, University of Cambridge, 19 J J Thomson Avenue, CB3 0HE Cambridge, U.K.
- Department of Chemistry, Imperial College
London, Imperial College Rd, SW7 2AZ London, U.K.
| | - Anne Staubitz
- Institute
for Analytical and Organic Chemistry, University
of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
- MAPEX
Center for Materials and Processes, University
of Bremen, Bibliothekstraße
1, D-28359 Bremen, Germany
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10
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Zeng Y, Zhou Y, Quan Q, Chen M. Facile Access to gem-Trifluoromethyl/Boron-Functionalized Polymers via Free-Radical Copolymerization and Cotelomerization. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00023] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Yang Zeng
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Yang Zhou
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Qinzhi Quan
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Mao Chen
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
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11
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Wakefield IV H, Jiang Q, Klausen RS. Azaborine Isomer Effects on Benzylic Ion Stability and Reactivity: Consequences for BN2VN Ionic Polymerization. Org Biomol Chem 2022; 20:1407-1414. [DOI: 10.1039/d1ob02467a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Benzylic cations and anions are implicated in the mechanism of critical organic transformations, such as styrene polymerization. We investigate the influence of BN for CC bond substitution on the reactivity...
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12
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Suzuki H, Nishikawa T, Makino H, Ouchi M. Anthranilamide-protected vinylboronic acid: rational monomer design for improved polymerization/transformation ability providing access to conventionally inaccessible copolymers. Chem Sci 2022; 13:12703-12712. [DOI: 10.1039/d2sc05094c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 10/18/2022] [Indexed: 11/21/2022] Open
Abstract
We designed a vinyl-boronic-acid protected by anthranilamide as a “transformable” monomer in radical polymerization to synthesize conventionally inaccessible copolymers, such as poly(vinyl alcohol-co-styrene) and poly(ethylene-co-acrylate).
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Affiliation(s)
- Hiroshi Suzuki
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 606-8501, Japan
| | - Tsuyoshi Nishikawa
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 606-8501, Japan
| | - Hiroshi Makino
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 606-8501, Japan
| | - Makoto Ouchi
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 606-8501, Japan
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13
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Ji Y, Klausen RS. Chain transfer to solvent in
BN 2‐vinylnaphthalene
radical polymerization. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yuyang Ji
- Department of Chemistry Johns Hopkins University Baltimore Maryland USA
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14
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Platin‐vermittelte Kupplung von B=N‐Einheiten: Synthese von BNBN‐Analoga von 1,3‐Dienen und Butatrien. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Brunecker C, Arrowsmith M, Fantuzzi F, Braunschweig H. Platinum-Templated Coupling of B=N Units: Synthesis of BNBN Analogues of 1,3-Dienes and a Butatriene. Angew Chem Int Ed Engl 2021; 60:16864-16868. [PMID: 34036694 PMCID: PMC8362192 DOI: 10.1002/anie.202106161] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Indexed: 12/02/2022]
Abstract
The 1:2 reaction of [μ-(dmpm)Pt(nbe)]2 (dmpm=bis(dimethylphosphino)methane, nbe=norbornene) with Cl2 BNR(SiMe3 ) (R=tBu, SiMe3 ) yields unsymmetrical (N-aminoboryl)aminoboryl PtI 2 complexes by B-N coupling via ClSiMe3 elimination. A subsequent intramolecular ClSiMe3 elimination from the tBu-derivative leads to cyclization of the BNBN unit, forming a unique 1,3,2,4-diazadiboretidin-2-yl ligand. In contrast, the analogous reaction with Br2 BN(SiMe3 )2 leads, via a twofold BrSiMe3 elimination, to a PtII 2 A-frame complex bridged by a linear BNBN isostere of butatriene. Structural and computational data confirm π electron delocalization over the entire BNBN unit.
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Affiliation(s)
- Carina Brunecker
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Merle Arrowsmith
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Felipe Fantuzzi
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Holger Braunschweig
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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16
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Kanazawa T, Nishikawa T, Ouchi M. RAFT polymerization of isopropenyl boronate pinacol ester and subsequent terminal olefination: precise synthesis of poly(alkenyl boronate)s and evaluation of their thermal properties. Polym J 2021. [DOI: 10.1038/s41428-021-00498-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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17
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Nishikawa T, Ouchi M. Recent Development in Polymer Reactions for Overcoming Synthetic Limitations in Chain-growth Polymerization. CHEM LETT 2021. [DOI: 10.1246/cl.200787] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Tsuyoshi Nishikawa
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Makoto Ouchi
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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18
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Appiarius Y, Stauch T, Lork E, Rusch P, Bigall NC, Staubitz A. From a 1,2-azaborinine to large BN-PAHs via electrophilic cyclization: synthesis, characterization and promising optical properties. Org Chem Front 2021. [DOI: 10.1039/d0qo00723d] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A synthetic approach towards boron-nitrogen substituted polycyclic aromatic hydrocarbons (BN-PAHs) via electrophilic cyclization is described and it is shown that the variation of the rings' connectivity may tune the emission wavelengths effectively.
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Affiliation(s)
- Yannik Appiarius
- University of Bremen
- Institute for Analytical and Organic Chemistry
- D-28359 Bremen
- Germany
- MAPEX Center for Materials and Processes
| | - Tim Stauch
- MAPEX Center for Materials and Processes
- D-28359 Bremen
- Germany
- University of Bremen
- Institute for Physical and Theoretical Chemistry
| | - Enno Lork
- University of Bremen
- Institute for Physical and Theoretical Chemistry
- D-28359 Bremen
- Germany
- University of Bremen
| | - Pascal Rusch
- Bremen Center for Computational Materials Science
- D-28359 Bremen
- Germany
- Leibniz University Hannover
- Institute for Physical Chemistry and Electrochemistry
| | - Nadja C. Bigall
- Bremen Center for Computational Materials Science
- D-28359 Bremen
- Germany
- Leibniz University Hannover
- Institute for Physical Chemistry and Electrochemistry
| | - Anne Staubitz
- University of Bremen
- Institute for Analytical and Organic Chemistry
- D-28359 Bremen
- Germany
- MAPEX Center for Materials and Processes
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19
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Resendiz-Lara DA, Annibale VT, Knights AW, Chitnis SS, Manners I. High Molar Mass Poly(alkylphosphinoboranes) via Iron-Catalyzed Dehydropolymerization. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c02082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Vincent T. Annibale
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
- Department of Chemistry, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
| | - Alastair W. Knights
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Saurabh S. Chitnis
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Ian Manners
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
- Department of Chemistry, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
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20
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Makino H, Nishikawa T, Ouchi M. Elucidating Monomer Character of an Alkenyl Boronate through Radical Copolymerization Leads to Copolymer Synthesis beyond the Limitation of Copolymerizability by Side-Chain Replacement. ACS Macro Lett 2020; 9:788-793. [PMID: 35648527 DOI: 10.1021/acsmacrolett.0c00287] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Isopropenyl boronic acid pinacol ester (IPBpin) was used as a comonomer in radical polymerization with a wide range of common vinyl monomers for elucidation of the monomer character and syntheses of conventionally inaccessible copolymers via the replacement of the boron pendant. The study revealed that the boron-containing monomer is categorized into an electron-rich conjugated monomer, which was well consistent with the results of density functional theory (DFT)-based investigation. One of the thus obtained copolymers, the IPBpin-styrene copolymer, was successfully transformed into an α-methyl vinyl alcohol (MVA)-styrene counterpart via oxidation of the boron pendant. The copolymer cannot be synthesized even with the acetyl-protected monomer instead of IPBpin due to poor copolymerization ability based on the nonconjugated character.
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Affiliation(s)
- Hiroshi Makino
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
| | - Tsuyoshi Nishikawa
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
| | - Makoto Ouchi
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
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21
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Ji Y, Zhou T, van de Wouw HL, Klausen RS. Organoborane Strategy for Polymers Bearing Lactone, Ester, and Alcohol Functionality. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b02201] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yuyang Ji
- Department of Chemistry, Johns Hopkins University, 3400 N. Charles St, Baltimore, Maryland 21218, United States
| | - Tiffany Zhou
- Department of Chemistry, Johns Hopkins University, 3400 N. Charles St, Baltimore, Maryland 21218, United States
| | - Heidi L. van de Wouw
- Department of Chemistry, Johns Hopkins University, 3400 N. Charles St, Baltimore, Maryland 21218, United States
| | - Rebekka S. Klausen
- Department of Chemistry, Johns Hopkins University, 3400 N. Charles St, Baltimore, Maryland 21218, United States
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22
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Resendiz-Lara DA, Whittell GR, Leitao EM, Manners I. Catalytic Synthesis, Characterization, and Properties of Polyaminoborane Homopolymers and Random Copolymers. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01139] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | - George R. Whittell
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol, BS8 1TS, U.K
| | - Erin M. Leitao
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol, BS8 1TS, U.K
| | - Ian Manners
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol, BS8 1TS, U.K
- Department of Chemistry, University of Victoria, Victoria, BC V8W 3V6, Canada
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23
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Lin H, McConnell CR, Jilus B, Liu SY, Jäkle F. Changing up BN-Polystyrene: Effect of Substitution Pattern on the Free-Radical Polymerization and Polymer Properties. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00466] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Huina Lin
- Department of Chemistry, Rutgers University—Newark, Newark, New Jersey 07102, United States
| | - Cameron R. McConnell
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02135, United States
| | - Berothy Jilus
- Department of Chemistry, Rutgers University—Newark, Newark, New Jersey 07102, United States
| | - Shih-Yuan Liu
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02135, United States
| | - Frieder Jäkle
- Department of Chemistry, Rutgers University—Newark, Newark, New Jersey 07102, United States
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24
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McConnell CR, Haeffner F, Baggett AW, Liu SY. 1,2-Azaborine's Distinct Electronic Structure Unlocks Two New Regioisomeric Building Blocks via Resolution Chemistry. J Am Chem Soc 2019; 141:9072-9078. [PMID: 31082254 PMCID: PMC6609151 DOI: 10.1021/jacs.9b03611] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Two new 1,2-azaborine building blocks that enable the broad diversification of previously not readily accessible C4 and C5 ring positions of the 1,2-azaborine heterocycle are developed. 1,2-Azaborine's distinct electronic structure allowed the resolution of a mixture of C4- and C5-borylated 1,2-azaborines. The connection between the electronic structure of C4 and C5 positions of 1,2-azaborine and their distinct reactivity patterns is revealed by a combination of reactivity studies and kinetic measurements that are supported by DFT calculations. Specifically, we show that oxidation by N-methylmorpholine N-oxide (NMO) is selective for the C4-borylated 1,2-azaborine, and the Ir-catalyzed deborylation is selective for the C5-borylated 1,2-azaborine via kinetically controlled processes. On the other hand, ligand exchange with diethanolamine takes place selectively with the C4-borylated isomer via a thermodynamically controlled process. These results represent the first examples for chemically distinguishing a mixture of two aryl mono-Bpin-substituted isomers.
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Affiliation(s)
- Cameron R. McConnell
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Fredrik Haeffner
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | | | - Shih-Yuan Liu
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
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25
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Vidal F, Jäkle F. Functional Polymeric Materials Based on Main‐Group Elements. Angew Chem Int Ed Engl 2019; 58:5846-5870. [DOI: 10.1002/anie.201810611] [Citation(s) in RCA: 129] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Fernando Vidal
- Department of Chemistry Rutgers University—Newark 73 Warren Street Newark NJ 07102 USA
| | - Frieder Jäkle
- Department of Chemistry Rutgers University—Newark 73 Warren Street Newark NJ 07102 USA
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26
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Vidal F, Jäkle F. Funktionelle polymere Materialien auf der Basis von Hauptgruppen‐Elementen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201810611] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Fernando Vidal
- Department of Chemistry Rutgers University—Newark 73 Warren Street Newark NJ 07102 USA
| | - Frieder Jäkle
- Department of Chemistry Rutgers University—Newark 73 Warren Street Newark NJ 07102 USA
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27
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Arz MI, Annibale VT, Kelly NL, Hanna JV, Manners I. Ring-Opening Polymerization of Cyclic Phosphonates: Access to Inorganic Polymers with a P V-O Main Chain. J Am Chem Soc 2019; 141:2894-2899. [PMID: 30726071 DOI: 10.1021/jacs.8b13435] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We describe a new class of inorganic polymeric materials featuring a main chain consisting of PV-O bonds and aryl side groups, which was obtained with >70 repeat units by ring-opening polymerization of cyclic phosphonates. This monomer-polymer system was found to be dynamic in solution enabling selective depolymerization under dilute conditions, which can be tuned by varying the substituents. The polymers show high thermal stability to weight loss and can be easily fabricated into self-standing thin films. Structural characterizations of the cyclic 6- and 12-membered ring precursors are also described.
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Affiliation(s)
- Marius I Arz
- School of Chemistry , University of Bristol , Cantock's Close , Bristol BS8 1TS , United Kingdom
| | - Vincent T Annibale
- School of Chemistry , University of Bristol , Cantock's Close , Bristol BS8 1TS , United Kingdom
| | - Nicole L Kelly
- Department of Physics , University of Warwick , Gibbet Hill Road , Coventry CV4 7AL , United Kingdom.,MAS CDT, Senate House, University of Warwick , Coventry CV4 7AL , United Kingdom
| | - John V Hanna
- Department of Physics , University of Warwick , Gibbet Hill Road , Coventry CV4 7AL , United Kingdom
| | - Ian Manners
- School of Chemistry , University of Bristol , Cantock's Close , Bristol BS8 1TS , United Kingdom.,Department of Chemistry , University of Victoria , Victoria , British Columbia V8W 3V6 , Canada
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28
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Han D, Anke F, Trose M, Beweries T. Recent advances in transition metal catalysed dehydropolymerisation of amine boranes and phosphine boranes. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.09.016] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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29
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van de Wouw HL, Klausen RS. BN Polystyrenes: Emerging Optical Materials and Versatile Intermediates. J Org Chem 2019; 84:1117-1125. [PMID: 30620583 DOI: 10.1021/acs.joc.8b02921] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BN polystyrenes are an emerging class of polyolefins functionalized with aromatic side chains in which at least one CC bond is replaced with a BN bond. This class of structures exhibits unusual photophysical properties relative to organic polymers. BN polystyrenes serve as intermediates in the preparation of functional polymers, including stereoregular polar polyolefins. The consequences of BN for CC bond substitution on reactivity and properties are highlighted.
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Affiliation(s)
- Heidi L van de Wouw
- Department of Chemistry , Johns Hopkins University , 3400 North Charles Street , Baltimore , Maryland 21218 , United States
| | - Rebekka S Klausen
- Department of Chemistry , Johns Hopkins University , 3400 North Charles Street , Baltimore , Maryland 21218 , United States
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30
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Bouchard N, Fontaine FG. Alkylammoniotrifluoroborate functionalized polystyrenes: polymeric pre-catalysts for the metal-free borylation of heteroarenes. Dalton Trans 2019; 48:4846-4856. [PMID: 30869102 DOI: 10.1039/c9dt00484j] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Three polymeric versions of ansa-N,N-dialkylammoniumtrifluoroborate ambiphilic molecules based on the styrene motif (poly(1-NMe2H+-2-BF3--4-styrene) (P-Me), poly(1-NEt2H+-2-BF3--4-styrene) (P-Et) and poly(1-piperidinyl-H+-2-BF3--4-styrene) (P-Pip)) were synthesized, characterized and tested as heterogeneous pre-catalysts for the borylation of electron-rich heteroarenes. These heterogeneous versions of previously reported pre-catalysts show similar reactivity patterns and represent the first examples of solid-supported FLP metal-free catalysts for the C-H borylation of heteroarenes.
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Affiliation(s)
- Nicolas Bouchard
- Département de Chimie, Centre de de Catalyse et Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec, CanadaG1V 0A6. frederic.fontaine.@chm.ulaval.ca
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31
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Abstract
BN/CC isosterism has emerged as a viable strategy to expand the chemical space of organic molecules. In particular, the application of BN/CC isosterism to arenes has received significant attention due to the vast available chemical space provided by aromatic hydrocarbons. The synthetic efforts directed at assembling novel aromatic BN heterocycles have resulted in the discovery of new properties and functions in a variety of fields including biomedical research, medicinal chemistry, materials science, catalysis, and organic synthesis. This tutorial review specifically covers recent advances in synthetic technologies that functionalize assembled boron-nitrogen (BN) heterocycles and highlights their distinct reactivity and selectivity in comparison to their carbonaceous counterparts. It is intended to serve as a state-of-the-art compendium for readers who are interested in the reaction chemistry of BN heterocycles.
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Affiliation(s)
- Cameron R McConnell
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts, 02467-3860, USA.
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32
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Chen L, Rawe BW, Adachi K, Gates DP. Phosphorus-Containing Block Copolymers from the Sequential Living Anionic Copolymerization of a Phosphaalkene with Methyl Methacrylate. Chemistry 2018; 24:18012-18019. [PMID: 30426585 DOI: 10.1002/chem.201803582] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 09/11/2018] [Indexed: 01/23/2023]
Abstract
Although living polymerization methods are widely applicable to organic monomers, their application to inorganic monomers is rare. For the first time, we show that the living poly(methylenephosphine) (PMPn - ) anion can function as a macroinitiator for olefins. Specifically, the phosphaalkene, MesP=CPh2 (PA), and methyl methacrylate (MMA) can be sequentially copolymerized using the BnLi-TMEDA initiator system in toluene. A series of PMPn -b-PMMAm copolymers with narrow dispersities are accessible (Đ=1.05-1.10). Analysis of the block copolymers provided evidence for -P-CPh2 -CH2 -CMe(CO2 Me)- switching groups. Importantly, this indicates that the -P-CPh2 - anion directly initiates the anionic polymerization of MMA and stands in stark contrast to the isomerization mechanism followed for the homopolymerization of PA. For the first time, the glass transition of a PMPn homopolymer has been measured (Tg =45.1 °C, n=20). The PMPn -b-PMMAm copolymers do not phase separate and show a single Tg which increases with higher PMMA content.
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Affiliation(s)
- Leixing Chen
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British, Columbia, Canada
| | - Benjamin W Rawe
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British, Columbia, Canada
| | - Kaoru Adachi
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British, Columbia, Canada.,Department of Chemistry and Materials Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
| | - Derek P Gates
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British, Columbia, Canada
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33
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Ramirez Y Medina IM, Rohdenburg M, Mostaghimi F, Grabowsky S, Swiderek P, Beckmann J, Hoffmann J, Dorcet V, Hissler M, Staubitz A. Tuning the Optoelectronic Properties of Stannoles by the Judicious Choice of the Organic Substituents. Inorg Chem 2018; 57:12562-12575. [PMID: 30284825 DOI: 10.1021/acs.inorgchem.8b01649] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Stannoles are organometallic rings in which the heteroatom is involved in a form of conjugation that is called σ*-π* conjugation. Only very little is known about how the substituents on the Sn atom or substituents on the stannole ring determine the optoelectronic properties of these heterocycles. In this work, this question has been studied experimentally and theoretically. Calculations of optimized equilibrium geometries, energy gaps between the highest occupied molecular orbitals (HOMOs) and lowest unoccupied molecular orbitals (LUMOs), and of the absorption spectra of a wide range of compounds were performed. The computational data showed that the substituents on the Sn atom influence the optoelectronic properties to a lower extent than the substituents in the 2 and 5 positions of the ring. These substituents in the 2 and 5 positions of the stannole ring can also have a strong influence on the overall planarity of the structure, in which mesomeric effects can play a substantial role only if the structure is planar. Thus, only structures with a planar backbone are of interest in the context of tuning the optoelectronic properties. These were selected for the experimental studies. On the basis of this information, a series of six novel stannoles was synthesized by the formation of a zirconium intermediate and subsequent transmetalation to obtain the tin compound. The calculated electronic HOMO-LUMO energy gaps varied between 2.94 and 2.68 eV. The measured absorption maxima were located between 415 and 448 nm compared to theoretically calculated values ranging from 447 nm (2.77 eV) to 482 nm (2.57 eV). In addition to these optical measurements, cyclic voltammetry data could be obtained, which show two reversible oxidation processes for three of the six stannoles. With this study, it could be demonstrated how the judicious choice of the substituents can lead to large and predictable bathochromic shifts in the absorption spectra.
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Affiliation(s)
- Isabel-Maria Ramirez Y Medina
- Institute for Organic and Analytical Chemistry , University of Bremen , Leobener Straße 7 , 28359 Bremen , Germany.,MAPEX Center for Materials and Processes , University of Bremen , Bibliothekstraße 1 , 28359 Bremen , Germany
| | - Markus Rohdenburg
- Institute for Applied and Physical Chemistry , University of Bremen , Leobener Straße 5 , 28359 Bremen , Germany.,MAPEX Center for Materials and Processes , University of Bremen , Bibliothekstraße 1 , 28359 Bremen , Germany
| | - Farzin Mostaghimi
- MAPEX Center for Materials and Processes , University of Bremen , Bibliothekstraße 1 , 28359 Bremen , Germany.,Institute of Inorganic Chemistry and Crystallography , University of Bremen , Leobener Straße 3 and 7 , 28359 Bremen , Germany
| | - Simon Grabowsky
- MAPEX Center for Materials and Processes , University of Bremen , Bibliothekstraße 1 , 28359 Bremen , Germany.,Institute of Inorganic Chemistry and Crystallography , University of Bremen , Leobener Straße 3 and 7 , 28359 Bremen , Germany
| | - Petra Swiderek
- Institute for Applied and Physical Chemistry , University of Bremen , Leobener Straße 5 , 28359 Bremen , Germany.,MAPEX Center for Materials and Processes , University of Bremen , Bibliothekstraße 1 , 28359 Bremen , Germany
| | - Jens Beckmann
- MAPEX Center for Materials and Processes , University of Bremen , Bibliothekstraße 1 , 28359 Bremen , Germany.,Institute of Inorganic Chemistry and Crystallography , University of Bremen , Leobener Straße 3 and 7 , 28359 Bremen , Germany
| | - Jonas Hoffmann
- Institute for Organic and Analytical Chemistry , University of Bremen , Leobener Straße 7 , 28359 Bremen , Germany.,MAPEX Center for Materials and Processes , University of Bremen , Bibliothekstraße 1 , 28359 Bremen , Germany
| | - Vincent Dorcet
- Université Rennes, CNRS, ISCR, UMR 6226, Campus de Beaulieu , 263 Av. du Général Leclerc , 35042 Rennes France
| | - Muriel Hissler
- Université Rennes, CNRS, ISCR, UMR 6226, Campus de Beaulieu , 263 Av. du Général Leclerc , 35042 Rennes France
| | - Anne Staubitz
- Institute for Organic and Analytical Chemistry , University of Bremen , Leobener Straße 7 , 28359 Bremen , Germany.,MAPEX Center for Materials and Processes , University of Bremen , Bibliothekstraße 1 , 28359 Bremen , Germany.,Otto-Diels-Institute for Organic Chemistry , University of Kiel , Otto-Hahn-Platz 4 , 24118 Kiel , Germany
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34
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Mendis SN, Zhou T, Klausen RS. Syndioselective Polymerization of a BN Aromatic Vinyl Monomer. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01707] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Shehani N. Mendis
- Department of Chemistry, Johns Hopkins University, 3400 N. Charles St., Baltimore, Maryland 21218, United States
| | - Tiffany Zhou
- Department of Chemistry, Johns Hopkins University, 3400 N. Charles St., Baltimore, Maryland 21218, United States
| | - Rebekka S. Klausen
- Department of Chemistry, Johns Hopkins University, 3400 N. Charles St., Baltimore, Maryland 21218, United States
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35
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van de Wouw HL, Awuyah EC, Baris JI, Klausen RS. An Organoborane Vinyl Monomer with Styrene-like Radical Reactivity: Reactivity Ratios and Role of Aromaticity. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01368] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Heidi L. van de Wouw
- Department of Chemistry, Johns Hopkins University, 3400 N. Charles St., Baltimore, Maryland 21218, United States
| | - Elorm C. Awuyah
- Department of Chemistry, Johns Hopkins University, 3400 N. Charles St., Baltimore, Maryland 21218, United States
| | - Jodie I. Baris
- Department of Chemistry, Johns Hopkins University, 3400 N. Charles St., Baltimore, Maryland 21218, United States
| | - Rebekka S. Klausen
- Department of Chemistry, Johns Hopkins University, 3400 N. Charles St., Baltimore, Maryland 21218, United States
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36
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Staubitz A. Hochmolekulare Polymere mit diversen Substituenten durch eine ungewöhnliche, metallfreie Synthese von Poly(aminoboranen). Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201801903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Anne Staubitz
- Institut für Organische und Analytische Chemie Universität Bremen Leobener Straße 7 28359 Bremen Deutschland
- MAPEX Center for Materials and Processes Universität Bremen Bibliothekstraße 1 28359 Bremen Deutschland
- Otto-Diels-Institut für Organische Chemie Christian-Albrechts-Universität zu Kiel Otto-Hahn-Platz 4 24098 Kiel Deutschland
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37
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Staubitz A. Generation of High‐Molecular‐Weight Polymers with Diverse Substituents: An Unusual Metal‐Free Synthesis of Poly(aminoborane)s. Angew Chem Int Ed Engl 2018; 57:5990-5992. [DOI: 10.1002/anie.201801903] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Anne Staubitz
- Institute for Organic and Analytical Chemistry University of Bremen Leobener Str. 7 28359 Bremen Germany
- MAPEX Center for Materials and Processes University of Bremen Bibliothekstr. 1 28359 Bremen Germany
- Otto-Diels-Institute for Organic Chemistry University of Kiel Otto-Hahn-Platz 4 24098 Kiel Germany
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38
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van de Wouw HL, Lee JY, Awuyah EC, Klausen RS. A BN Aromatic Ring Strategy for Tunable Hydroxy Content in Polystyrene. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711650] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Heidi L. van de Wouw
- Department of Chemistry; Johns Hopkins University; 3400 N. Charles St Baltimore MD 21218 USA
| | - Jae Young Lee
- Department of Chemistry; Johns Hopkins University; 3400 N. Charles St Baltimore MD 21218 USA
| | - Elorm C. Awuyah
- Department of Chemistry; Johns Hopkins University; 3400 N. Charles St Baltimore MD 21218 USA
| | - Rebekka S. Klausen
- Department of Chemistry; Johns Hopkins University; 3400 N. Charles St Baltimore MD 21218 USA
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39
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van de Wouw HL, Lee JY, Awuyah EC, Klausen RS. A BN Aromatic Ring Strategy for Tunable Hydroxy Content in Polystyrene. Angew Chem Int Ed Engl 2018; 57:1673-1677. [DOI: 10.1002/anie.201711650] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Heidi L. van de Wouw
- Department of Chemistry; Johns Hopkins University; 3400 N. Charles St Baltimore MD 21218 USA
| | - Jae Young Lee
- Department of Chemistry; Johns Hopkins University; 3400 N. Charles St Baltimore MD 21218 USA
| | - Elorm C. Awuyah
- Department of Chemistry; Johns Hopkins University; 3400 N. Charles St Baltimore MD 21218 USA
| | - Rebekka S. Klausen
- Department of Chemistry; Johns Hopkins University; 3400 N. Charles St Baltimore MD 21218 USA
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40
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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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41
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Turner JR, Resendiz-Lara DA, Jurca T, Schäfer A, Vance JR, Beckett L, Whittell GR, Musgrave RA, Sparkes HA, Manners I. Synthesis, Characterization, and Properties of Poly(aryl)phosphinoboranes Formed via Iron-Catalyzed Dehydropolymerization. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201700120] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Joshua R. Turner
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | | | - Titel Jurca
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - André Schäfer
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - James R. Vance
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - Laura Beckett
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - George R. Whittell
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - Rebecca A. Musgrave
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - Hazel A. Sparkes
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - Ian Manners
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
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42
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Lorenz T, Crumbach M, Eckert T, Lik A, Helten H. Poly(p
-phenyleniminoboran): ein Bor-Stickstoff-Analogon von Poly(p
-phenylenvinylen). Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612476] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Thomas Lorenz
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52056 Aachen Deutschland
| | - Merian Crumbach
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52056 Aachen Deutschland
| | - Thomas Eckert
- Institut für Physikalische Chemie; RWTH Aachen University; Landoltweg 2 52056 Aachen Deutschland
| | - Artur Lik
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52056 Aachen Deutschland
| | - Holger Helten
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52056 Aachen Deutschland
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43
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Lorenz T, Crumbach M, Eckert T, Lik A, Helten H. Poly(p
-phenylene iminoborane): A Boron-Nitrogen Analogue of Poly(p
-phenylene vinylene). Angew Chem Int Ed Engl 2017; 56:2780-2784. [DOI: 10.1002/anie.201612476] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Indexed: 01/27/2023]
Affiliation(s)
- Thomas Lorenz
- Institute of Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
| | - Merian Crumbach
- Institute of Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
| | - Thomas Eckert
- Institute of Physical Chemistry; RWTH Aachen University; Landoltweg 2 52056 Aachen Germany
| | - Artur Lik
- Institute of Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
| | - Holger Helten
- Institute of Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
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44
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Anke F, Han D, Klahn M, Spannenberg A, Beweries T. Formation of high-molecular weight polyaminoborane by Fe hydride catalysed dehydrocoupling of methylamine borane. Dalton Trans 2017; 46:6843-6847. [DOI: 10.1039/c7dt01487b] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The complex [(PNHP)Fe(H)(CO)(HBH3)] (PNHP = HN(CH2CH2Pi-Pr2)2) serves as a catalyst precursor for the selective dehydrocoupling of methylamine borane at room temperature, tentatively via an off-metal polymerisation pathway.
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Affiliation(s)
- F. Anke
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
| | - D. Han
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
| | - M. Klahn
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
| | - A. Spannenberg
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
| | - T. Beweries
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
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45
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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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46
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Resendiz-Lara DA, Stubbs NE, Arz MI, Pridmore NE, Sparkes HA, Manners I. Boron–nitrogen main chain analogues of polystyrene: poly(B-aryl)aminoboranes via catalytic dehydrocoupling. Chem Commun (Camb) 2017; 53:11701-11704. [DOI: 10.1039/c7cc07331c] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High molecular weight B-arylated polyaminoboranes are obtained via catalytic dehydropolymerisation of B-aryl amine–boranes and represent the first inorganic polystyrene analogues with a B–N main chain.
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Affiliation(s)
| | | | - Marius I. Arz
- School of Chemistry
- University of Bristol
- Bristol BS8 1TS
- UK
| | | | | | - Ian Manners
- School of Chemistry
- University of Bristol
- Bristol BS8 1TS
- UK
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47
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van de Wouw HL, Lee JY, Klausen RS. Gram-scale free radical polymerization of an azaborine vinyl monomer. Chem Commun (Camb) 2017; 53:7262-7265. [DOI: 10.1039/c7cc02300f] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The gram-scale polymerization of a novel azaborine vinyl monomer is reported.
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Affiliation(s)
| | - Jae Young Lee
- Department of Chemistry
- Johns Hopkins University
- Baltimore
- USA
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