Issue 33, 2017

Cation–anion interaction directed dual-mode switchable mechanochromic luminescence

Abstract

In the past few years, organic mechanochromic materials have attracted more and more attention and a number of organic mechanochromic materials have been reported. However, only a single mode for switching of mechanochromic luminescence, either red-shift or blue-shift of the luminescence, can be observed for all the reported mechanochromic materials. Herein, based on a single tributyl(perylen-3-ylmethyl)phosphonium (TPMP) fluorophore, dramatic dual-mode switchable mechanochromic luminescence triggered by tunable cation–anion interactions has been reported for the first time. The trend of mechanochromic luminescence changes gradually from a red-shift to a blue-shift along with the strength order of the cation–anion interaction: Br > BF4 > PF6 > NTf2. A reversible transition of a crystalline state to an amorphous phase might be involved in the mechanochromic luminescence of TPMP·X (X = counteranion) with different counteranions.

Graphical abstract: Cation–anion interaction directed dual-mode switchable mechanochromic luminescence

Supplementary files

Article information

Article type
Paper
Submitted
06 Jun 2017
Accepted
29 Jul 2017
First published
31 Jul 2017

J. Mater. Chem. C, 2017,5, 8527-8534

Cation–anion interaction directed dual-mode switchable mechanochromic luminescence

G. Li, Y. Xu, Q. Kong, W. Zhuang and Y. Wang, J. Mater. Chem. C, 2017, 5, 8527 DOI: 10.1039/C7TC02497E

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