2,7-Diazatriptycene: acid-responsive ternary fluorescence switching via modulation of through-space conjugation

Ryo Inoue; Yusuke Hashimoto; Atsushi Aoki; Taniyuki Furuyama; Kazuya Kubo; Yasuhiro Morisaki; Tomohiro Agou

doi:10.1039/D6CC01046F

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2,7-Diazatriptycene: acid-responsive ternary fluorescence switching via modulation of through-space conjugation

Ryo Inoue,

*^a Yusuke Hashimoto,

^a Atsushi Aoki,^b Taniyuki Furuyama,

^c Kazuya Kubo,

^a Yasuhiro Morisaki

*^b and Tomohiro Agou

*^a

Author affiliations

* Corresponding authors

^a Department of Material Science, Graduate School of Science, University of Hyogo 3-2-1 Kouto, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
E-mail: inoue@sci.u-hyogo.ac.jp, agou@sci.u-hyogo.ac.jp

^b Department of Applied Chemistry for Environment, School of Biological and Environmental Sciences, Kwansei Gakuin University 1 Gakuen Uegahara, Sanda, Hyogo 669-1330, Japan
E-mail: ymo@kwansei.ac.jp

^c Department of Applied Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan

Abstract

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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DOI: https://doi.org/10.1039/D6CC01046F
Article type: Communication
Submitted: 17 Feb 2026
Accepted: 22 Apr 2026
First published: 22 Apr 2026

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Chem. Commun., 2026, Advance Article

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2,7-Diazatriptycene: acid-responsive ternary fluorescence switching via modulation of through-space conjugation

R. Inoue, Y. Hashimoto, A. Aoki, T. Furuyama, K. Kubo, Y. Morisaki and T. Agou, Chem. Commun., 2026, Advance Article , DOI: 10.1039/D6CC01046F

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2,7-Diazatriptycene: acid-responsive ternary fluorescence switching via modulation of through-space conjugation

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2,7-Diazatriptycene: acid-responsive ternary fluorescence switching via modulation of through-space conjugation

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