Tuning the Photophysical and Excited State Properties of Phosphorescent Iridium(III) Complexes by Polycyclic Unit Substitution
Abstract Two novel N‐embedded polycyclic units functionalized phosphorescent iridium(III) complexes (Ir‐1 and Ir‐2) with substituents in different positions have been prepared. Complex Ir‐1 bearing the substituent at the 3‐position shows a distinct blue shift single‐peak emission (524 nm) with a hig...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2019-03-01
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| Series: | ChemistryOpen |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/open.201900041 |
| _version_ | 1797771189738799104 |
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| author | Cuicui Wu Qiuxia Li Xinghua Zhang Dr. Chao Shi Gang Li Mingjie Wang Kang Li Prof. Dr. Aihua Yuan |
| author_facet | Cuicui Wu Qiuxia Li Xinghua Zhang Dr. Chao Shi Gang Li Mingjie Wang Kang Li Prof. Dr. Aihua Yuan |
| author_sort | Cuicui Wu |
| collection | DOAJ |
| description | Abstract Two novel N‐embedded polycyclic units functionalized phosphorescent iridium(III) complexes (Ir‐1 and Ir‐2) with substituents in different positions have been prepared. Complex Ir‐1 bearing the substituent at the 3‐position shows a distinct blue shift single‐peak emission (524 nm) with a higher luminescence efficiency (ΦPL=42 %) and shorter emission lifetime (τ=282 ns) by comparison with 4‐position substitution based complex Ir‐2 (ΦPL=23 %, τ=562 ns), which exhibits a dual‐peak emission (564 nm and 602 nm), and phosphorescence color can be tuned from green to yellow. In addition, DFT calculations demonstrate that unusual ligand‐to‐metal charge transfer (3LMCT) excited state property can be found in Ir‐2, which is in contrast to metal‐to‐ligand charge transfer (3MLCT) excited state character in Ir‐1. This result can be attribute to strong electron‐donating character and 4‐position substitution effect of the unit. |
| first_indexed | 2024-03-12T21:33:54Z |
| format | Article |
| id | doaj.art-c7d8b42175b04b4294b5f32cddab249d |
| institution | Directory Open Access Journal |
| issn | 2191-1363 |
| language | English |
| last_indexed | 2024-03-12T21:33:54Z |
| publishDate | 2019-03-01 |
| publisher | Wiley-VCH |
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| series | ChemistryOpen |
| spelling | doaj.art-c7d8b42175b04b4294b5f32cddab249d2023-07-27T14:18:47ZengWiley-VCHChemistryOpen2191-13632019-03-018333934310.1002/open.201900041Tuning the Photophysical and Excited State Properties of Phosphorescent Iridium(III) Complexes by Polycyclic Unit SubstitutionCuicui Wu0Qiuxia Li1Xinghua Zhang2Dr. Chao Shi3Gang Li4Mingjie Wang5Kang Li6Prof. Dr. Aihua Yuan7School of Environmental and Chemical Engineering Jiangsu University of Science and Technology Zhenjiang 212003 P. R. China., .School of Material Science and Engineering Jiangsu University of Science and Technology Zhenjiang 212003 P. R. China.School of Environmental and Chemical Engineering Jiangsu University of Science and Technology Zhenjiang 212003 P. R. China., .School of Environmental and Chemical Engineering Jiangsu University of Science and Technology Zhenjiang 212003 P. R. China., .School of Environmental and Chemical Engineering Jiangsu University of Science and Technology Zhenjiang 212003 P. R. China., .School of Environmental and Chemical Engineering Jiangsu University of Science and Technology Zhenjiang 212003 P. R. China., .School of Environmental and Chemical Engineering Jiangsu University of Science and Technology Zhenjiang 212003 P. R. China., .School of Environmental and Chemical Engineering Jiangsu University of Science and Technology Zhenjiang 212003 P. R. China., .Abstract Two novel N‐embedded polycyclic units functionalized phosphorescent iridium(III) complexes (Ir‐1 and Ir‐2) with substituents in different positions have been prepared. Complex Ir‐1 bearing the substituent at the 3‐position shows a distinct blue shift single‐peak emission (524 nm) with a higher luminescence efficiency (ΦPL=42 %) and shorter emission lifetime (τ=282 ns) by comparison with 4‐position substitution based complex Ir‐2 (ΦPL=23 %, τ=562 ns), which exhibits a dual‐peak emission (564 nm and 602 nm), and phosphorescence color can be tuned from green to yellow. In addition, DFT calculations demonstrate that unusual ligand‐to‐metal charge transfer (3LMCT) excited state property can be found in Ir‐2, which is in contrast to metal‐to‐ligand charge transfer (3MLCT) excited state character in Ir‐1. This result can be attribute to strong electron‐donating character and 4‐position substitution effect of the unit.https://doi.org/10.1002/open.201900041N-embedded complexespolycyclic unitsphosphorescenceiridium complexesphotophysical properties |
| spellingShingle | Cuicui Wu Qiuxia Li Xinghua Zhang Dr. Chao Shi Gang Li Mingjie Wang Kang Li Prof. Dr. Aihua Yuan Tuning the Photophysical and Excited State Properties of Phosphorescent Iridium(III) Complexes by Polycyclic Unit Substitution ChemistryOpen N-embedded complexes polycyclic units phosphorescence iridium complexes photophysical properties |
| title | Tuning the Photophysical and Excited State Properties of Phosphorescent Iridium(III) Complexes by Polycyclic Unit Substitution |
| title_full | Tuning the Photophysical and Excited State Properties of Phosphorescent Iridium(III) Complexes by Polycyclic Unit Substitution |
| title_fullStr | Tuning the Photophysical and Excited State Properties of Phosphorescent Iridium(III) Complexes by Polycyclic Unit Substitution |
| title_full_unstemmed | Tuning the Photophysical and Excited State Properties of Phosphorescent Iridium(III) Complexes by Polycyclic Unit Substitution |
| title_short | Tuning the Photophysical and Excited State Properties of Phosphorescent Iridium(III) Complexes by Polycyclic Unit Substitution |
| title_sort | tuning the photophysical and excited state properties of phosphorescent iridium iii complexes by polycyclic unit substitution |
| topic | N-embedded complexes polycyclic units phosphorescence iridium complexes photophysical properties |
| url | https://doi.org/10.1002/open.201900041 |
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