Fluorene-containing tetraphenylethylene molecules as lasing materials

Orofino, C. et al. (2017) Fluorene-containing tetraphenylethylene molecules as lasing materials. Journal of Polymer Science Part A: Polymer Chemistry, 55(4), pp. 734-746. (doi: 10.1002/pola.28421) (PMID:28781425) (PMCID:PMC5516184)

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A series of star‐shaped oligofluorene molecules, each containing a TPE core, have been specifically designed and produced to show effective aggregation‐induced emission (AIE). Each molecule differs either in the number of fluorene units within the arms (e.g., 1 or 4, compounds 4 and 5), or the terminal group positioned at the end of each arm (e.g., H, TMS, or TPA, compounds 4, 6, and 7). Although they are all poor emitters in solution phase they become efficient yellow‐green luminogens in the condensed state. Their AIE properties were investigated in THF/H2O mixtures, with each molecule exhibiting a clear emission enhancement at specific water contents. An all‐organic distributed feedback (DFB) laser was fabricated using compound 4 as the gain material and exhibited an average threshold energy fluence of 60 ± 6 μJ/cm2 and emission in the green region. Furthermore, piezofluorochromism studies on a thin film of this material displayed a linear dependence of the amplified spontaneous emission (ASE) peak position on applied pressure, indicating potential applications as lasing‐based pressure sensors.

Item Type:Articles
Additional Information:C. Orofino thanks the Basque Government for funding. A. L. Kanibolotsky thanks the EPSRC for funding (EP/N009908/1). Additionally, P. J. Skabara thanks the Royal Society for a Wolfson Research Merit Award.
Glasgow Author(s) Enlighten ID:Skabara, Professor Peter and Findlay, Dr Neil
Authors: Orofino, C., Foucher, C., Farrell, F., Findlay, N.J., Breig, B., Kanibolotsky, A.L., Guilhabert, B., Vilela, F., Laurand, N., Dawson, M.D., and Skabara, P.J.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Journal of Polymer Science Part A: Polymer Chemistry
ISSN (Online):1099-0518
Published Online:21 November 2016
Copyright Holders:Copyright © 2016 The Authors
First Published:First published in Journal of Polymer Science Part A: Polymer Chemistry 55(4): 734-746
Publisher Policy:Reproduced under a Creative Commons License
Data DOI:10.15129/2b03d705-6512-4525-bd30-bef75aa025ad

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