Issue 2, 2012
From the journal:

Chemical Science

Deciphering mechanism of aggregation-induced emission (AIE): Is E–Zisomerisation involved in an AIE process?†

Nai-Wen Tseng,‡ab   Jianzhao Liu,‡ab   Jason C. Y. Ng,ab   Jacky W. Y. Lam,ab   Herman H. Y. Sung,a   Ian D. Williamsa  and  Ben Zhong Tang*abc  

* Corresponding authors

a Department of Chemistry, Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China
E-mail: tangbenz@ust.hk

b HKUST Fok Ying Tung Research Institute, Nansha, Guangzhou, China

c Department of Polymer Science & Engineering, Zhejiang University, Hangzhou, China

Abstract

In this work, we address a mechanistic issue on AIE process and correct a long-held misconception on stilbene photoluminescence. E–Zisomerisation has been generally recognized as the cause of emission quenching in stilbene solutions. A natural question arisen from this common belief is whether suppression of E–Zisomerisation by aggregate formation in a stilbenic fluorogen system is responsible for its AIE phenomenon. Monitoring of the structural change of a stilbene derivative named 1,2-diphenyl-1,2-di(p-tolyl)ethene by NMR during UV irradiation reveals that the E–Zisomerisation is not involved in its AIE process under the normal photoluminescence spectral measurement conditions.

Graphical abstract: Deciphering mechanism of aggregation-induced emission (AIE): Is E–Zisomerisation involved in an AIE process?

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Article information

DOI
https://doi.org/10.1039/C1SC00690H
Article type
Edge Article
Submitted
18 Sep 2011
Accepted
19 Oct 2011
First published
20 Oct 2011

Chem. Sci., 2012,3, 493-497

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Deciphering mechanism of aggregation-induced emission (AIE): Is E–Zisomerisation involved in an AIE process?

N. Tseng, J. Liu, J. C. Y. Ng, J. W. Y. Lam, H. H. Y. Sung, I. D. Williams and B. Z. Tang, Chem. Sci., 2012, 3, 493 DOI: 10.1039/C1SC00690H

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