Sturala, Jiri, Etherington, Marc K, Bismillah, Aisha N et al. (7 more authors) (2017) Excited-State Aromatic Interactions in the Aggregation-Induced Emission of Molecular Rotors. Journal of the American Chemical Society. pp. 17882-17889. ISSN 1520-5126
Abstract
Small, apolar aromatic groups, such as phenyl rings, are commonly included in the structures of fluorophores to impart hindered intramolecular rotations, leading to desirable solid-state luminescence properties. However, they are not normally considered to take part in through-space interactions that influence the fluorescent output. Here, we report on the photoluminescence properties of a series of phenyl-ring molecular rotors bearing three, five, six, and seven phenyl groups. The fluorescent emissions from two of the rotors are found to originate, not from the localized excited state as one might expect, but from unanticipated through-space aromatic-dimer states. We demonstrate that these relaxed dimer states can form as a result of intra- or intermolecular interactions across a range of environments in solution and solid samples, including conditions that promote aggregation-induced emission. Computational modeling also suggests that the formation of aromatic-dimer excited states may account for the photophysical properties of a previously reported luminogen. These results imply, therefore, that this is a general phenomenon that should be taken into account when designing and interpreting the fluorescent outputs of luminescent probes and optoelectronic devices based on fluorescent molecular rotors.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 American Chemical Society |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) |
Depositing User: | Pure (York) |
Date Deposited: | 22 Jan 2021 16:20 |
Last Modified: | 23 Oct 2024 00:08 |
Published Version: | https://doi.org/10.1021/jacs.7b08570 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1021/jacs.7b08570 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:170389 |
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Description: Excited-State Aromatic Interactions in the Aggregation-Induced Emission of Molecular Rotors
Licence: CC-BY 2.5