title: Dual Emission and Mechanofluorochromism of a V-Shaped π-System Composed of Disulfonyl-Substituted Dibenzocyclooctatetraenes.
abstract: A series of dibenzocyclooctatetraenes 6 bearing phenylethynyl and phenylsulfonyl groups were synthesized from bromo-substituted formylbenzyl sulfone 4 via cyclic dimerization of 4 and Sonogashira coupling of the resulting dibromocyclooctatetraene 3 with terminal acetylenes. The diamino derivative 6b exhibited dual emission with emission maxima at 436 and 547 nm. Furthermore, in the fluorescence of 6b, solvatofluorochromism was observed in response to solvent polarity, whereas in the solid states, mechanofluorochromism was observed.
authors: Department of Applied Chemistry and Biotechnology, Okayama University of Science , 1-1 Ridai-cho, Kita-ku, Okayama 700-0005, Japan.
authors: Takanori
authors: T
authors: Nishida
authors: Department of Applied Chemistry and Biotechnology, Okayama University of Science , 1-1 Ridai-cho, Kita-ku, Okayama 700-0005, Japan.
authors: Shinya
authors: S
authors: Ohta
authors: Department of Applied Chemistry and Biotechnology, Okayama University of Science , 1-1 Ridai-cho, Kita-ku, Okayama 700-0005, Japan.
authors: Feng
authors: F
authors: Xu
authors: Department of Applied Chemistry and Biotechnology, Okayama University of Science , 1-1 Ridai-cho, Kita-ku, Okayama 700-0005, Japan.
authors: Kenta
authors: K
authors: Shinohara
authors: Research Institute of Natural Sciences, Okayama University of Science , 1-1 Ridai-cho, Kita-ku, Okayama 700-0005 Japan.
authors: Takahiro
authors: T
authors: Kamada
authors: Research Institute of Natural Sciences, Okayama University of Science , 1-1 Ridai-cho, Kita-ku, Okayama 700-0005 Japan.
authors: Haruo
authors: H
authors: Akashi
authors: Department of Applied Chemistry and Biotechnology, Okayama University of Science , 1-1 Ridai-cho, Kita-ku, Okayama 700-0005, Japan.
authors: Makoto
authors: M
authors: Takezaki
authors: Department of Chemistry, Okayama University of Science , 1-1 Ridai-cho, Kita-ku, Okayama 700-0005, Japan.
authors: Kan
authors: K
authors: Wakamatsu
authors: Department of Applied Chemistry and Biotechnology, Okayama University of Science , 1-1 Ridai-cho, Kita-ku, Okayama 700-0005, Japan.
authors: Akihiro
authors: A
authors: Orita