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2,7-Diazatriptycene: acid-responsive ternary fluorescence switching via modulation of through-space conjugation
Ryo Inoue1, Yusuke Hashimoto1, Atsushi Aoki2
1Department of Material Science, Graduate School of Science, University of Hyogo 3-2-1 Kouto, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan. inoue@sci.u-hyogo.ac.jp.
None:
An unexplored 2,7-diazatriptycene exhibits protonation-controlled ternary fluorescence switching (on/off, cyan/violet) through modulation of through-space conjugation. Theoretical calculations clarified the origin of the contrasting fluorescence quantum yields of 2,7- and 2,6-diazatriptycene. Protonation also reorganizes crystal packing from herringbone assemblies to charge-segregated layered structures.
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