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Cation–anion interaction directed dual-mode switchable mechanochromic luminescence

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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

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Publication details

The article was received on 06 Jun 2017, accepted on 29 Jul 2017 and first published on 31 Jul 2017


Article type: Paper
DOI: 10.1039/C7TC02497E
Citation: J. Mater. Chem. C, 2017, Advance Article
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    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, Advance Article , DOI: 10.1039/C7TC02497E

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