Switching between intramolecular charge transfer and excimer emissions in solids based on aryl-modified ethynyl‒o-carboranes
Summary: Because of its unique electronic properties, o-carborane has attracted attention as a scaffold for constructing solid-state luminescent materials. Here, we report stimulus-responsive luminochromic materials based on polycyclic aromatic hydrocarbon (PAH), such as anthracene and pyrene, modif...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-02-01
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| Series: | Cell Reports Physical Science |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S266638642200025X |
| _version_ | 1818973424559587328 |
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| author | Hideki Yamamoto Junki Ochi Kazuhiro Yuhara Kazuo Tanaka Yoshiki Chujo |
| author_facet | Hideki Yamamoto Junki Ochi Kazuhiro Yuhara Kazuo Tanaka Yoshiki Chujo |
| author_sort | Hideki Yamamoto |
| collection | DOAJ |
| description | Summary: Because of its unique electronic properties, o-carborane has attracted attention as a scaffold for constructing solid-state luminescent materials. Here, we report stimulus-responsive luminochromic materials based on polycyclic aromatic hydrocarbon (PAH), such as anthracene and pyrene, modified with the ethynyl-o-carborane unit. Initially, luminochromism originating from switching of different emission mechanisms is described between intramolecular charge transfer (ICT) emission and excimer emission triggered by mechanical stimuli, heat, and vapor annealing regarding the single o-carborane-substituted anthracene. Next, the luminescence properties of two ethynyl-o-carboranes at both ends of PAHs are presented. In particular, multi-step mechanochromic luminescence of the pyrene derivative is explained. Stepwisely changes triggered by weak stimuli that can induce cracking sites, followed by luminochromic behavior and by grinding treatment, which causes phase transition from crystal to amorphous, leading to luminescent mechanism changes from ICT emission to excimer emission. |
| first_indexed | 2024-12-20T15:23:57Z |
| format | Article |
| id | doaj.art-db94616f585f4fca8bb8cdce652815e5 |
| institution | Directory Open Access Journal |
| issn | 2666-3864 |
| language | English |
| last_indexed | 2024-12-20T15:23:57Z |
| publishDate | 2022-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Cell Reports Physical Science |
| spelling | doaj.art-db94616f585f4fca8bb8cdce652815e52022-12-21T19:35:55ZengElsevierCell Reports Physical Science2666-38642022-02-0132100758Switching between intramolecular charge transfer and excimer emissions in solids based on aryl-modified ethynyl‒o-carboranesHideki Yamamoto0Junki Ochi1Kazuhiro Yuhara2Kazuo Tanaka3Yoshiki Chujo4Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University Katsura, Nishikyo-ku, Kyoto 615-8510, JapanDepartment of Polymer Chemistry, Graduate School of Engineering, Kyoto University Katsura, Nishikyo-ku, Kyoto 615-8510, JapanDepartment of Polymer Chemistry, Graduate School of Engineering, Kyoto University Katsura, Nishikyo-ku, Kyoto 615-8510, JapanDepartment of Polymer Chemistry, Graduate School of Engineering, Kyoto University Katsura, Nishikyo-ku, Kyoto 615-8510, Japan; Corresponding authorDepartment of Polymer Chemistry, Graduate School of Engineering, Kyoto University Katsura, Nishikyo-ku, Kyoto 615-8510, JapanSummary: Because of its unique electronic properties, o-carborane has attracted attention as a scaffold for constructing solid-state luminescent materials. Here, we report stimulus-responsive luminochromic materials based on polycyclic aromatic hydrocarbon (PAH), such as anthracene and pyrene, modified with the ethynyl-o-carborane unit. Initially, luminochromism originating from switching of different emission mechanisms is described between intramolecular charge transfer (ICT) emission and excimer emission triggered by mechanical stimuli, heat, and vapor annealing regarding the single o-carborane-substituted anthracene. Next, the luminescence properties of two ethynyl-o-carboranes at both ends of PAHs are presented. In particular, multi-step mechanochromic luminescence of the pyrene derivative is explained. Stepwisely changes triggered by weak stimuli that can induce cracking sites, followed by luminochromic behavior and by grinding treatment, which causes phase transition from crystal to amorphous, leading to luminescent mechanism changes from ICT emission to excimer emission.http://www.sciencedirect.com/science/article/pii/S266638642200025Xcarboraneexcimercharge transfersolid-state luminescenceluminochromism |
| spellingShingle | Hideki Yamamoto Junki Ochi Kazuhiro Yuhara Kazuo Tanaka Yoshiki Chujo Switching between intramolecular charge transfer and excimer emissions in solids based on aryl-modified ethynyl‒o-carboranes Cell Reports Physical Science carborane excimer charge transfer solid-state luminescence luminochromism |
| title | Switching between intramolecular charge transfer and excimer emissions in solids based on aryl-modified ethynyl‒o-carboranes |
| title_full | Switching between intramolecular charge transfer and excimer emissions in solids based on aryl-modified ethynyl‒o-carboranes |
| title_fullStr | Switching between intramolecular charge transfer and excimer emissions in solids based on aryl-modified ethynyl‒o-carboranes |
| title_full_unstemmed | Switching between intramolecular charge transfer and excimer emissions in solids based on aryl-modified ethynyl‒o-carboranes |
| title_short | Switching between intramolecular charge transfer and excimer emissions in solids based on aryl-modified ethynyl‒o-carboranes |
| title_sort | switching between intramolecular charge transfer and excimer emissions in solids based on aryl modified ethynyl o carboranes |
| topic | carborane excimer charge transfer solid-state luminescence luminochromism |
| url | http://www.sciencedirect.com/science/article/pii/S266638642200025X |
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