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Issue 4, 2017
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Aggregation-induced emission: mechanistic study of the clusteroluminescence of tetrathienylethene

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Abstract

In this work we have investigated the aggregation-induced emission (AIE) behaviour of 1,1,2,2-tetra(thiophen-2-yl)ethene (tetrathienylethene, TTE). The semi-locked and fully-locked derivatives (sl-TTE and fl-TTE) have been synthesized to better understand the mechanism behind the solid state photoluminescence of TTE. TTE is a typical AIEgen and its luminescence can be explained through the mechanistic understanding of the restriction of intramolecular motions (RIM). The emissive behaviour of TTE in the THF/water aggregates and crystal state have also been studied, revealing a remarkable red-shift of 35 nm. A similar red-shift emission of 37 nm from the THF/water aggregates to the crystal state is also observed for (E)-1,2-di(thiophen-2-yl)ethene (trans-dithienylethene, DTE). Crystal analysis has revealed that the emission red-shifts are ascribable to the presence of strong sulfur–sulfur (S⋯S) intra- and intermolecular interactions that are as close as 3.669 Å for TTE and 3.679 Å for DTE. These heteroatom interactions could help explain the photoluminescence of non-conventional luminophores as well as the luminescence of non-conjugated biomacromolecules.

Graphical abstract: Aggregation-induced emission: mechanistic study of the clusteroluminescence of tetrathienylethene

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Publication details

The article was received on 25 Nov 2016, accepted on 11 Jan 2017 and first published on 11 Jan 2017


Article type: Edge Article
DOI: 10.1039/C6SC05192H
Citation: Chem. Sci., 2017,8, 2629-2639
  • Open access: Creative Commons BY license
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    Aggregation-induced emission: mechanistic study of the clusteroluminescence of tetrathienylethene

    L. Viglianti, N. L. C. Leung, N. Xie, X. Gu, H. H. Y. Sung, Q. Miao, I. D. Williams, E. Licandro and B. Z. Tang, Chem. Sci., 2017, 8, 2629
    DOI: 10.1039/C6SC05192H

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