Seminar: Aggregation-Induced Emission (AIE): A Wonderland Full of Exoticism and Excitement

Friday, 25 January 2019 - 3:30pm – Friday, 25 January 2019 - 4:30pm  |  CHEMSCI M10

Speaker: Professor Ben Zhong Tang

Abstract: Luminescent molecule based materials are important members of advanced materials, and have received considerable attention from both scientific and industrial communities. Traditional luminophores usually suffer from emission weakening or quenching in aggregated state and these phenomena which are notoriously known as aggregation-caused quenching (ACQ) largely limit the application scope of them. In 2001, we found that some propeller-like molecules showed luminescence behavior that was exactly opposite to the ACQ effect: the aggregate formation turned on their light emissions, changing them from weak fluorogens into strong emitters. We termed this novel phenomenon as aggregation-induced emission (AIE) and called these luminescent molecules as AIEgens. Through systematic study it has been rationalized that the restriction of intramolecular motions (RIM) is highly responsible for the AIE effect, and a great number of new AIEgens have been developed with emission colors covering the entire visible, extending into UV and near-infrared (NIR) spectral region under the guidance of RIM mechanism. Based on the tunable photophysical processes, AIEgens have been widely applied in many high-tech fields such as optoelectronics, chemosensing, bioimaging, etc, and have been formed a new family of advanced materials.

Selected references

[1] Luo, J; Tang, B. Z. etc.Chem. Commun. 2001, 1740-1741.

[2] Chen. S.; Tang, B. Z. etc.J. Am. Chem. Soc. 2013, 135, 4926.

[3] Mei J, Tang BZ, et. al. Chem. Rev. 2015, 115, 11718-11940.

[4] Gu, X.; Zhao, E.; Tang, B. Z. etc. Adv. Mater. 2016, 28, 5064.

[5] Cheng Y.; Tang, B. Z. etc.Adv. Mater. 2017, 1703900.

[6] Wei, P.; Tang, B. Z. etc. J. Am. Chem. Soc. 2018, 140, 1966.

[7] Qi, J.; Ding, D.; Tang, B. Z. etc. Nat. Commun. 2018,9, 1848.