A triphenylamine-based benzoxazole derivative as a high-contrast piezofluorochromic material induced by protonation

Abstract

A triphenylamine-based benzoxazole derivative (<bold>BVDP</bold>) as a typical D–π–A molecule could be used as a low contrast piezofluorochromic material with a spectral red-shift of 29 nm. However, when<bold>BVDP</bold>bound a proton to form<bold>BVDP+H</bold>, a high contrast piezofluorochromism (Δ<italic>λ</italic>= 75 nm) could be observed.