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(a) Fluorescence spectra (λexc = 343 nm) of polyurethane films with 0.1 wt % of covalently-linked TPE as a function of the drawing ratio, and the chemical structure of the synthesized AIE probe in the inset; (b) the same film under the 365 nm UV lamp at a different stretching state. Adapted with permission from [99]. Copyright (2013) John Wiley and Sons.
