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Ikeno A, Hayakawa M, Sakai M, Tsutsui Y, Nakatsuka S, Seki S, Hatakeyama T. π-Extended 9b-Boraphenalenes: Synthesis, Structure, and Physical Properties. J Am Chem Soc 2024; 146:17084-17093. [PMID: 38861619 DOI: 10.1021/jacs.4c02407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
Boraphenalenes, compounds in which one carbon atom in the phenalenyl skeleton is replaced with a boron atom, have attracted attention for their solid-state and electronic structures; however, the construction of boraphenalene skeletons remains challenging because of the lack of suitable methods. Through this study, we showed that the tandem borylative cyclization of C3-symmetric dehydrobenzo[12]annulenes produces a new class of fully fused boron-atom-embedded polycyclic hydrocarbons possessing a 9b-boraphenalene skeleton. The obtained compounds exhibited high electron-accepting characteristics, and their two-step redox process was reversible in the reductive region, involving interconversion of 9b-boraphenalene between Hückel aromaticity and antiaromaticity. Notably, the benzo[b]fluorene-fused derivative exhibited a stepwise single-crystal-to-single-crystal (SCSC) phase transition triggered by thermal annealing. Intermolecular electron coupling calculation of the crystal structures suggested a significant improvement of charge transporting ability associated with the SCSC phase transition. Moreover, adequate photoconductivity was observed for the single crystals before and after the SCSC phase transition through flash photolysis-time-resolved microwave conductivity.
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Affiliation(s)
- Atsuhiro Ikeno
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Masahiro Hayakawa
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Mugiho Sakai
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Yusuke Tsutsui
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University Nishikyo-ku, Kyoto 615-8510, Japan
| | - Soichiro Nakatsuka
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Shu Seki
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University Nishikyo-ku, Kyoto 615-8510, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
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Markham GD, Rostami H, Larkin JD, Bock CW. Models for boronic acid receptors II: a computational structural, bonding, and thermochemical investigation of the RB(OH)2∙H2O∙NH3 and RB(−OCH2CH2O−)∙NH3∙H2O potential energy surfaces (R = H, methyl, phenyl, and ortho-methyl-phenyl). Struct Chem 2023. [DOI: 10.1007/s11224-023-02131-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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Toffoli D, Ponzi A, Bernes E, de Simone M, Grazioli C, Coreno M, Stredansky M, Cossaro A, Fronzoni G. Correlation effects in B1s core-excited states of boronic-acid derivatives: An experimental and computational study. J Chem Phys 2019; 151:134306. [PMID: 31594342 DOI: 10.1063/1.5120175] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
We performed a theoretical investigation on the influence of electronic correlation effects on the B1s NEXAFS spectrum of boronic acid derivatives, namely, boric acid [B(OH)3], phenyl boronic acid (PBA), and 1,4-phenyl diboronic acid (PDBA), employing different computational schemes of increasing complexity, ranging from the purely one-electron scheme based on the transition potential method of density functional theory (DFT-TP), time-dependent DFT (TDDFT), and multiconfigurational self-consistent field (MCSCF). We also report experimental measurements of the B1s NEXAFS spectra of the aforementioned molecules together with the high-resolution C1s NEXAFS spectrum of PBA. We demonstrate that due to the shallow B1s core energy levels compared to C, O, and N, the inclusion of static correlation effects, which can be incorporated by using multireference approaches to excited states, assumes a decisive role in reconciling experiment and theory on B1s core-electron excitation energies and oscillator strengths to valence states. This claim is corroborated by the good agreement that we find between the DFT-TP calculated C1s NEXAFS spectrum and that experimentally measured for PBA and by the failure of both DFT-TP and TDDFT approaches with a selection of xc functionals kernels to properly describe the B1s NEXAFS spectrum of PBA and PDBA, at variance with the good agreement with the experiment that is found by employing the MCSCF wave function approach.
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Affiliation(s)
- Daniele Toffoli
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, via L. Giorgieri 1, 34127 Trieste, Italy
| | - Aurora Ponzi
- Ruder Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
| | - Elisa Bernes
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, via L. Giorgieri 1, 34127 Trieste, Italy
| | - Monica de Simone
- CNR-IOM Laboratorio TASC, Basovizza SS-14, km 163.5, 34149 Trieste, Italy
| | - Cesare Grazioli
- CNR-IOM Laboratorio TASC, Basovizza SS-14, km 163.5, 34149 Trieste, Italy
| | - Marcello Coreno
- CNR-I (LD2 Unit) Basovizza SS-14, Km 163,5 34149 Trieste, Italy
| | - Matus Stredansky
- CNR-IOM Laboratorio TASC, Basovizza SS-14, km 163.5, 34149 Trieste, Italy
| | - Albano Cossaro
- CNR-IOM Laboratorio TASC, Basovizza SS-14, km 163.5, 34149 Trieste, Italy
| | - Giovanna Fronzoni
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, via L. Giorgieri 1, 34127 Trieste, Italy
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Ponikvar-Svet M, Zeiger DN, Liebman JF. Interplay of thermochemistry and Structural Chemistry, the journal (volume 28, 2017, issues 3–4) and the discipline. Struct Chem 2018. [DOI: 10.1007/s11224-018-1137-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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