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, respectively. These heteroatom interactions could help explain the photoluminescence of non-conventional luminophores as well as luminescence of non-conjugated biomacromolecules.
Aggregation-Induced Emission : Mechanistic Study of Clusteroluminescence of Tetrathienylethene / L. Viglianti, N.L.C. Leung, N. Xie, X. Gu, H.H.Y. Sung, Q. Miao, I.D. Williams, E. Licandro, B. Zhong Tang. - In: CHEMICAL SCIENCE. - ISSN 2041-6539. - 8:4(2017), pp. 2629-2639.
|Titolo:||Aggregation-Induced Emission : Mechanistic Study of Clusteroluminescence of Tetrathienylethene|
LICANDRO, EMANUELA (Penultimo)
|Parole Chiave:||clusteroluminogen; aggregation-induced emission; AIE; mechanistic study; tetrathienylethene; TTE|
|Settore Scientifico Disciplinare:||Settore CHIM/06 - Chimica Organica|
Settore CHIM/02 - Chimica Fisica
|Data di pubblicazione:||2017|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1039/C6SC05192H|
|Appare nelle tipologie:||01 - Articolo su periodico|