temperature without any external field and then automatically
disappeared and recovered to the original state as a result of
strengthened H-bond interactions. The technique developed in
this study has great applications such in optical/photonic paper,
optical sensors, LCs displays, etc.
Acknowledgements
This work is financially supported by the National Natural
Science Foundations (Grant 50903004).
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This journal is ª The Royal Society of Chemistry 2011
J. Mater. Chem., 2011, 21, 8574–8582 | 8581