Mechanochromism triggered fluorescent color switching among polymorphs of a natural fluorescence pigment

• Published in: Chemical communications (Cambridge, England) Vol. 52; no. 75; pp. 11288 - 11291
• Main Authors: Li, Meiqi, Zhang, Qi, Wang, Jian-Rong, Mei, Xuefeng
• Format: Journal Article
• Language: English
• Published: England 13.09.2016
• Subjects: chemical reactions; color; Colors (materials); emodin; Fluorescence; Hydrates; Pigments; Security; Switching; synthesis

A naturally occurring pigment emodin is reported here as an example to extend mechanochromic luminescent material systems. Three polymorphs, two hydrates and the amorphous state of emodin, are successfully synthesized. These solid forms exhibit significantly different fluorescence properties, which...