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Zhihua Sun, Junhua Luo, Tianliang Chen, Lina Li, Ren-Gen Xiong, Ming-Liang Tong and Maochun Hong Distinct Molecular Motions in a Switchable Chromophore Dielectric 4-N,N-Dimethylamino-4′-N′-methylstilbazolium Trifluoromethanesulfonate Advanced Functional Materials 22

Version of Record online: 26 JUL 2012 | DOI: 10.1002/adfm.201201770

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A new organic chromophore dielectric, 4-N,N-dimethylamino-4′-N′- methylstilbazolium trifluoromethanesulfonate, which undergoes a reversible phase transition with striking dielectric anomalies, is synthesized as a molecular rotator. Two very distinct molecular motions are observed, namely the “earth rotation” of partial units and the “earth revolution” of the whole molecule. Above its critical point, the anionic moiety exhibits an unprecedented 51.2° orientational motion.

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