Achieving red/near-infrared mechanoresponsive luminescence turn-on: mechanically disturbed metastable nanostructures in organic solids

Abstract

Two slightly twisted A–π–D–π–A molecules were prepared to demonstrate that the red/near-infrared mechanoresponsive luminescence turn-on behaviors could be realized through mechanically disturbing their weakly/non-emissive metastable nanostructures, giving emissive amorphous aggregates with λ_em = 620 nm, Φ_F = 12% (h-DIPT) and λ_em = 700 nm, Φ_F = 10% (DIPT), respectively.