Fig. 4: Thermal elimination of Z-CDPM and theoretical calculations.
From: A chameleon AIEgen exhibiting six distinct yet tunable thermal and photoswitchable states
a 1H NMR spectra of Z-CDPM before and after heating at 145 °C under different conditions (500 MHz). Z-CDPM was highlighted in purple, DPXDC was highlighted in green, and DPXC was highlighted in blue. b Proposed reaction routes for the formation of DPXC from Z-CDPM and DPXDC. c Photoluminescence (PL) spectra of Z-DPXC in THF/water mixtures (10 μM). Inset: plots of I/I0 value versus the water fractions (fw) of THF/water mixtures of DPXC, where I0 = PL intensity in pure THF solution. λex/em = 355/440 nm. d X-ray diffraction diffractograms of the crystal powder of DPXC. Insets: photographs of crystals of DPXC. Scale bar: 2 mm. e Energy profile for the thermal reactions of Z-CDPM calculated at the M06-2X/6-31 G(d,p) level with solvent correction. TS transition state, INT intermediate.
