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Enhanced Emission Efficiency and Excited State Lifetime Due to Restricted Intramolecular Motion in Silole Aggregates
Abstract
The aggregation-induced emission (AIE) properties of 1,1,2,3,4,5-hexaphenylsilole (HPS) and poly{11-[(1,2,3,4,5-pentaphenylsilolyl)oxy]-1-phenyl-1-undecyne} (PS9PA) were studied by time-resolved fluorescence technique. The enhanced fluorescence and long fluorescent lifetime were obtained for the sample in an aggregate state as compared to the sample in solution. The time-decay of fluorescence of HPS and PS9PA in high viscosity solvents and low-temperature glasses has also been measured in detail to further investigate the possible mechanism for AIE. Enhanced light emission and long fluorescence lifetime were detected for both HPS and PS9PA in the solution-thickening and -cooling experiments. These results provided direct evidence that the enhanced photoluminescence (PL) efficiency is due to restricted intramolecular motion, which ascribes AIE to the deactivation of nonradiative decay caused by restricted torsional motions of the molecules in the solid state or aggregate form.
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Cited by
Aggregation-Induced Emission: Together We Shine, United We Soar!
Mei, J., Leung, N. L. C., Kwok, R. T. K., Lam, J. W. Y., & Tang, B. Z. (2015) · Chemical Reviews · doi:10.1021/acs.chemrev.5b00263 · Cited by 8,270
Self-citationShustova, N. B., McCarthy, B. D., & Dincă, M. (2011) · Journal of the American Chemical Society · doi:10.1021/ja209327q · Cited by 733
Aggregation‐Induced Emission (AIE): A Historical Perspective
Würthner, F. (2020) · Angewandte Chemie International Edition · doi:10.1002/anie.202007525 · Cited by 696
Luminogenic polymers with aggregation-induced emission characteristics
Qin, A., Lam, J. W. Y., & Tang, B. Z. (2012) · Progress in Polymer Science · doi:10.1016/j.progpolymsci.2011.08.002 · Cited by 441
Self-citationLi, Z., Dong, Y., Mi, B., Tang, Y., Häussler, M., Tong, H., Dong, Y., Lam, J. W. Y., Ren, Y., Sung, H. H. Y., et al. (2005) · The Journal of Physical Chemistry B · doi:10.1021/jp0503462 · Cited by 360
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Metadata
- Authors
- Ren, Y., Lam, J. W. Y., Dong, Y., Tang, B. Z., & Wong, K. S.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-01-01
- Volume
- 109
- Issue
- 3
- Pages
- 1135-1140
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2032462758
- Cited by
- 339
- References
- 0
- FWCI
- 6.65
- Type
- journal article
- Language
- en
- Open access
- closed
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- Ren, Y., Lam, J. W. Y., Dong, Y., Tang, B. Z., & Wong, K. S. (2005). Enhanced Emission Efficiency and Excited State Lifetime Due to Restricted Intramolecular Motion in Silole Aggregates. The Journal of Physical Chemistry B. https://doi.org/10.1021/jp046659z
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