Enhanced mechano-responsive luminescence in polyurethanes by supramolecular mechanophores based on synergy between quadruple H-bonding and π–π stacking

Mechanoresponsive luminescent (MRL) PUs based on supramolecular mechanophores dominated by quadruple H-bonding and π–π stacking achieved dual-channel MRL by I M / I E ratio and wavelength shift with high sensitivity and reversibility.