AIE-active heteroleptic iridium complexes showing piezochromic luminescence
•Two new iridium complexes with aggregation-induced emission (AIE) properties were designed and synthesized.•Piezochromic luminescence (PCL) properties of iridium complexes are regulated by different methyl-modified cyclometalated ligands. In this work, two heteroleptic iridium complexes Ir(L)2PyC4B...
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| Published in | Journal of molecular structure Vol. 1287; p. 135712 |
|---|---|
| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier B.V
05.09.2023
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| Subjects | |
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| ISSN | 0022-2860 1872-8014 |
| DOI | 10.1016/j.molstruc.2023.135712 |
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| Abstract | •Two new iridium complexes with aggregation-induced emission (AIE) properties were designed and synthesized.•Piezochromic luminescence (PCL) properties of iridium complexes are regulated by different methyl-modified cyclometalated ligands.
In this work, two heteroleptic iridium complexes Ir(L)2PyC4BCz named Ir-1 and Ir-2 were designed and synthesized, where L stands for 2-(4-methylphenyl)pyridine and 4-methyl-2-phenylpyridine, respectively; PyC4BCz for 9-(4-(4,5-dimethyl-2-(pyridin-2-yl)-1H-imidazolyl)butyl)-9H-carbazole. Their photophysical properties were investigated. The two complexes show good aggregation-induced emission (AIE) features. Nanoparticles in solution are related to their AIE properties. The mechanism of piezochromic luminescence (PCL) of complex Ir-2 was explored. On the one hand, strong intermolecular interactions are formed by hydrogen bonds in crystal. On the other hand, PXRD data indicate that the distance between molecules and disordered molecular arrangement can be changed by external mechanical grinding. According to DFT calculation and UV–vis diffuse reflectance spectra, we found that the PCL was ascribed to the intermolecular charge-transfer and the change of energy gap.
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| AbstractList | •Two new iridium complexes with aggregation-induced emission (AIE) properties were designed and synthesized.•Piezochromic luminescence (PCL) properties of iridium complexes are regulated by different methyl-modified cyclometalated ligands.
In this work, two heteroleptic iridium complexes Ir(L)2PyC4BCz named Ir-1 and Ir-2 were designed and synthesized, where L stands for 2-(4-methylphenyl)pyridine and 4-methyl-2-phenylpyridine, respectively; PyC4BCz for 9-(4-(4,5-dimethyl-2-(pyridin-2-yl)-1H-imidazolyl)butyl)-9H-carbazole. Their photophysical properties were investigated. The two complexes show good aggregation-induced emission (AIE) features. Nanoparticles in solution are related to their AIE properties. The mechanism of piezochromic luminescence (PCL) of complex Ir-2 was explored. On the one hand, strong intermolecular interactions are formed by hydrogen bonds in crystal. On the other hand, PXRD data indicate that the distance between molecules and disordered molecular arrangement can be changed by external mechanical grinding. According to DFT calculation and UV–vis diffuse reflectance spectra, we found that the PCL was ascribed to the intermolecular charge-transfer and the change of energy gap.
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| ArticleNumber | 135712 |
| Author | Xu, Xiangpin Zhao, Nianyu Zhang, Yuyang Mao, Yueyuan Song, Zhongming Cao, Chenhui Liu, Lei |
| Author_xml | – sequence: 1 givenname: Zhongming orcidid: 0000-0001-6878-5818 surname: Song fullname: Song, Zhongming email: songzhm@ahstu.edu.cn organization: College of Chemistry and Materials Engineering, Anhui Science and Technology University, Fengyang 233100, PR China – sequence: 2 givenname: Xiangpin surname: Xu fullname: Xu, Xiangpin organization: College of Chemistry and Materials Engineering, Anhui Science and Technology University, Fengyang 233100, PR China – sequence: 3 givenname: Nianyu surname: Zhao fullname: Zhao, Nianyu organization: College of Chemistry and Materials Engineering, Anhui Science and Technology University, Fengyang 233100, PR China – sequence: 4 givenname: Chenhui surname: Cao fullname: Cao, Chenhui organization: Anhui Sholon New Material Technology Co., Ltd., Chuzhou 239599, PR China – sequence: 5 givenname: Yuyang surname: Zhang fullname: Zhang, Yuyang organization: College of Chemistry and Materials Engineering, Anhui Science and Technology University, Fengyang 233100, PR China – sequence: 6 givenname: Lei surname: Liu fullname: Liu, Lei organization: College of Chemistry and Materials Engineering, Anhui Science and Technology University, Fengyang 233100, PR China – sequence: 7 givenname: Yueyuan surname: Mao fullname: Mao, Yueyuan email: maoyy@ahstu.edu.cn organization: College of Chemistry and Materials Engineering, Anhui Science and Technology University, Fengyang 233100, PR China |
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| Cites_doi | 10.1039/B712416C 10.1021/acs.inorgchem.1c02316 10.1021/acsnano.2c07263 10.1016/j.jlumin.2021.118322 10.1016/j.dyepig.2019.107855 10.1016/j.jlumin.2022.119083 10.1021/acs.chemrev.5b00263 10.1021/jacs.9b11080 10.1039/C9TC01299K 10.1039/c0cs00114g 10.1021/jacs.2c07133 10.1016/j.jorganchem.2020.121644 10.1016/j.jlumin.2022.119223 10.1039/C9CC08545A 10.1016/j.snb.2017.12.122 10.1021/acs.inorgchem.8b00789 10.1039/b105159h 10.1039/C8TC03984D 10.1039/c2tc00558a 10.1016/j.jorganchem.2020.121595 10.1002/cptc.202000255 10.1039/c2cs35171d 10.1016/j.snb.2018.10.013 10.1039/C6TC00237D 10.1038/ncomms4601 10.1039/c2dt31013a 10.1002/anie.202115704 10.1039/c1cs15113d |
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| Snippet | •Two new iridium complexes with aggregation-induced emission (AIE) properties were designed and synthesized.•Piezochromic luminescence (PCL) properties of... |
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| SubjectTerms | AIE Iridium complexes PCL |
| Title | AIE-active heteroleptic iridium complexes showing piezochromic luminescence |
| URI | https://dx.doi.org/10.1016/j.molstruc.2023.135712 |
| Volume | 1287 |
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