Open AccessFluorene‐containing tetraphenylethylene molecules as lasing materials
Author(s) -
Orofino C.,
Foucher C.,
Farrell F.,
Findlay N. J.,
Breig B.,
Kanibolotsky A. L.,
Guilhabert B.,
Vilela F.,
Laurand N.,
Dawson M. D.,
Skabara P. J.
Publication year - 2017
Publication title -
journal of polymer science part a: polymer chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.768
H-Index - 152
eISSN - 1099-0518
pISSN - 0887-624X
DOI - 10.1002/pola.28421
Subject(s) - tetraphenylethylene , fluorene , lasing threshold , polymer , molecule , polystyrene , aggregation induced emission , photochemistry , chemistry , materials science , polymer chemistry , fluorescence , organic chemistry , optoelectronics , optics , wavelength , physics
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/H 2 O 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/cm 2 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. © 2016 The Authors. Journal of Polymer Science Part A: Polymer Chemistry Published by Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017 , 55 , 734–746