Cover Feature: Mechanochromic Luminescence (MCL) of Purely Organic Two‐Component Dyes: Wide‐Range MCL over 300 nm and Two‐Step MCL by Charge‐Transfer Complexation (Chem. Eur. J. 56/2021)

Abstract

The creation of two-component dyes has proven to be an effective strategy to achieve remarkable mechanochromic luminescence (MCL) properties. The shift of the maximum emission wavelength (Δλem) range of a bis(1-pyrenylmethyl)diamine derivative has been significantly improved by mixing it with typical organic dyes that do not exhibit MCL behavior. Most notably, a wide-range MCL (Δλem=340 nm) has been achieved for a mixture with 3,4,9,10-perylenetetracarboxylic diimide. Furthermore, a two-step MCL has been realized by mixing with 9,10-anthraquinone. More information can be found in the Full Paper by S. Ito, T. Tachikawa, et al. (DOI: 10.1002/chem.202102700).