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Gon M, Yaegashi M, Tanaka K, Chujo Y. Near-Infrared Emissive Hypervalent Compounds with Germanium(IV)-Fused Azobenzene π-Conjugated Systems. Chemistry 2023; 29:e202203423. [PMID: 36441133 DOI: 10.1002/chem.202203423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 11/28/2022] [Accepted: 11/28/2022] [Indexed: 11/30/2022]
Abstract
A novel molecular design for showing near-infrared (NIR) emission is still required for satisfying growing demands for NIR-light technology. In this research, hypervalent compounds with germanium (Ge)-fused azobenzene (GAz) scaffolds were discovered that can exhibit NIR emission (λPL =690∼721 nm, ΦPL =0.03∼0.04) despite compact π-conjugated systems. The unique optical properties are derived from the trigonal bipyramidal geometry of the hypervalent compounds constructed by combination of Ge and azobenzene-based tridentate ligands. Experimental and theoretical calculation results disclosed that the germanium-nitrogen (Ge-N) coordination at the equatorial position strongly reduces the energy level of the LUMO (lowest unoccupied molecular orbital), and the three-center four-electron (3 c-4 e) bond in the apical position effectively rises the energy level of the HOMO (highest occupied molecular orbital). It is emphasized that large narrowing of the HOMO-LUMO energy gap is achieved just by forming the hypervalent bond. In addition, the narrow-energy-gap property can be enhanced by extension of π-conjugation. The obtained π-conjugated polymer shows efficient NIR emission both in solution (λPL =770 nm and ΦPL =0.10) and film (λPL =807 nm and ΦPL =0.04). These results suggest that collaboration of a hypervalent bond and a π-conjugated system is a novel and effective strategy for tuning electronic properties even in the NIR region.
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Affiliation(s)
- Masayuki Gon
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Misao Yaegashi
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
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Peddarao T, Baishya A, Sarkar N, Acharya R, Nembenna S. Conjugated Bis‐Guanidines (CBGs) as
β
‐Diketimine Analogues: Synthesis, Characterization of CBGs/Their Lithium Salts and CBG Li Catalyzed Addition of B−H and TMSCN to Carbonyls. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100141] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Thota Peddarao
- School of Chemical Sciences National Institute of Science Education and Research (NISER) Homi Bhabha National Institute (HBNI) Bhubaneswar 752050 India
| | - Ashim Baishya
- School of Chemical Sciences National Institute of Science Education and Research (NISER) Homi Bhabha National Institute (HBNI) Bhubaneswar 752050 India
| | - Nabin Sarkar
- School of Chemical Sciences National Institute of Science Education and Research (NISER) Homi Bhabha National Institute (HBNI) Bhubaneswar 752050 India
| | - Rudresh Acharya
- School of Biological Sciences National Institute of Science Education and Research (NISER) Homi Bhabha National Institute (HBNI) Bhubaneswar 752050 India
| | - Sharanappa Nembenna
- School of Chemical Sciences National Institute of Science Education and Research (NISER) Homi Bhabha National Institute (HBNI) Bhubaneswar 752050 India
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3
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Maar RR, Katzman BD, Boyle PD, Staroverov VN, Gilroy JB. Cationic Boron Formazanate Dyes**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ryan R. Maar
- Department of Chemistry and The Centre for Advanced Materials and Biomaterials Research (CAMBR) The University of Western Ontario 1151 Richmond Street North London Ontario N6A 5B7 Canada
| | - Benjamin D. Katzman
- Department of Chemistry and The Centre for Advanced Materials and Biomaterials Research (CAMBR) The University of Western Ontario 1151 Richmond Street North London Ontario N6A 5B7 Canada
| | - Paul D. Boyle
- Department of Chemistry and The Centre for Advanced Materials and Biomaterials Research (CAMBR) The University of Western Ontario 1151 Richmond Street North London Ontario N6A 5B7 Canada
| | - Viktor N. Staroverov
- Department of Chemistry and The Centre for Advanced Materials and Biomaterials Research (CAMBR) The University of Western Ontario 1151 Richmond Street North London Ontario N6A 5B7 Canada
| | - Joe B. Gilroy
- Department of Chemistry and The Centre for Advanced Materials and Biomaterials Research (CAMBR) The University of Western Ontario 1151 Richmond Street North London Ontario N6A 5B7 Canada
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Maar RR, Katzman BD, Boyle PD, Staroverov VN, Gilroy JB. Cationic Boron Formazanate Dyes*. Angew Chem Int Ed Engl 2021; 60:5152-5156. [PMID: 33217138 DOI: 10.1002/anie.202015036] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Indexed: 12/12/2022]
Abstract
Incorporation of cationic boron atoms into molecular frameworks is an established strategy for creating chemical species with unusual bonding and reactivity but is rarely thought of as a way of enhancing molecular optoelectronic properties. Using boron formazanate dyes as examples, we demonstrate that the wavelengths, intensities, and type of the first electronic transitions in BN heterocycles can be modulated by varying the charge, coordination number, and supporting ligands at the cationic boron atom. UV-vis absorption spectroscopy measurements and density-functional (DFT) calculations show that these modulations are caused by changes in the geometry and extent of π-conjugation of the boron formazanate ring. These findings suggest a new strategy for designing optoelectronic materials based on π-conjugated heterocycles containing boron and other main-group elements.
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Affiliation(s)
- Ryan R Maar
- Department of Chemistry and The Centre for Advanced Materials and Biomaterials Research (CAMBR), The University of Western Ontario, 1151 Richmond Street North, London, Ontario, N6A 5B7, Canada
| | - Benjamin D Katzman
- Department of Chemistry and The Centre for Advanced Materials and Biomaterials Research (CAMBR), The University of Western Ontario, 1151 Richmond Street North, London, Ontario, N6A 5B7, Canada
| | - Paul D Boyle
- Department of Chemistry and The Centre for Advanced Materials and Biomaterials Research (CAMBR), The University of Western Ontario, 1151 Richmond Street North, London, Ontario, N6A 5B7, Canada
| | - Viktor N Staroverov
- Department of Chemistry and The Centre for Advanced Materials and Biomaterials Research (CAMBR), The University of Western Ontario, 1151 Richmond Street North, London, Ontario, N6A 5B7, Canada
| | - Joe B Gilroy
- Department of Chemistry and The Centre for Advanced Materials and Biomaterials Research (CAMBR), The University of Western Ontario, 1151 Richmond Street North, London, Ontario, N6A 5B7, Canada
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Maar RR, Hoffman NA, Staroverov VN, Gilroy JB. Oxoborane Formation Turns on Formazanate‐Based Photoluminescence. Chemistry 2019; 25:11015-11019. [DOI: 10.1002/chem.201902419] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Indexed: 12/21/2022]
Affiliation(s)
- Ryan R. Maar
- Department of Chemistry and The Centre for Advanced Materials and Biomaterials ResearchThe University of Western Ontario 1151 Richmond Street North London, Ontario N6A 5B7 Canada
| | - Nicholas A. Hoffman
- Department of Chemistry and The Centre for Advanced Materials and Biomaterials ResearchThe University of Western Ontario 1151 Richmond Street North London, Ontario N6A 5B7 Canada
| | - Viktor N. Staroverov
- Department of Chemistry and The Centre for Advanced Materials and Biomaterials ResearchThe University of Western Ontario 1151 Richmond Street North London, Ontario N6A 5B7 Canada
| | - Joe B. Gilroy
- Department of Chemistry and The Centre for Advanced Materials and Biomaterials ResearchThe University of Western Ontario 1151 Richmond Street North London, Ontario N6A 5B7 Canada
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Gu S, Wu S, Cao L, Li M, Qin N, Zhu J, Wang Z, Li Y, Li Z, Chen J, Lu Z. Tunable Redox Chemistry and Stability of Radical Intermediates in 2D Covalent Organic Frameworks for High Performance Sodium Ion Batteries. J Am Chem Soc 2019; 141:9623-9628. [DOI: 10.1021/jacs.9b03467] [Citation(s) in RCA: 182] [Impact Index Per Article: 36.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Shuai Gu
- Department of Materials Science & Engineering, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, P. R. China
| | - Shaofei Wu
- Department of Materials Science & Engineering, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, P. R. China
| | - Lujie Cao
- Department of Materials Science & Engineering, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, P. R. China
| | - Minchan Li
- Department of Materials Science & Engineering, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, P. R. China
| | - Ning Qin
- Department of Materials Science & Engineering, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, P. R. China
| | - Jian Zhu
- Department of Materials Science & Engineering, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, P. R. China
| | - Zhiqiang Wang
- Department of Materials Science & Engineering, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, P. R. China
| | - Yingzhi Li
- Department of Materials Science & Engineering, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, P. R. China
| | - Zhiqiang Li
- Department of Materials Science & Engineering, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, P. R. China
| | - Jingjing Chen
- Department of Materials Science & Engineering, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, P. R. China
| | - Zhouguang Lu
- Department of Materials Science & Engineering, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, P. R. China
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