108
4 Mechano-Responsive Luminescence via Crystal-to-Crystal Phase …
Fig. 4.6 Photographs of a 1o and b 1ac under room light (left) and UV light (right). 1ac was
obtained by sonication of 1o for 20 min
Fig. 4.7 1 H NMR spectra of 1ch and 1ac obtained by several procedures dissolved in CDCl 3 . Light
green line: 1ch was obtained by pricking, dark green line: 1ch by crystal contact, blueish-green
line: 1ac by pricking, blue line: 1ac by crystal contact, black line: 1ac by sonication, and gray line:
1 ground