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

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...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2016-01, Vol.52 (75), p.11288-11291
Main Authors: Li, Meiqi, Zhang, Qi, Wang, Jian-Rong, Mei, Xuefeng
Format: Article
Language:English
Subjects:
Colors (materials)
Fluorescence
Hydrates
Pigments
Security
Switching
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Summary: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 indicates its potential application in mechano-sensors and security papers. The solid-state study of emodin demonstrates the feasibility of building new MCL systems via controlling the solid-state transition of natural fluorescent dyes.
ISSN:1359-7345
1364-548X
DOI:10.1039/c6cc04958c