open access

https://hdl.handle.net/2115/91503

Bis(triarylmethylium)-type Macrocyclic Dications : Mechanochromic Emission Extending to the Red Region

英語

mechanochromism

2023-03

Wiley-Blackwell

ChemPlusChem

88(3)

e202300110

Macrocyclic dications 2(2+) composed of two triarylmethylium units were designed and synthesized. In contrast to the reference monocations 1(+), macrocyclic dications 2(2+) exhibited mechanochromic emission extending to the red region (-900 nm), since the luminescence color in a solid state can reversibly change due to their constrained structures granted by alkylene linkers and the choice of a proper counterion. X-ray diffraction and spectroscopic analyses revealed that such mechanochromic behavior was induced by the crystal-to-amorphous transition. A change in the intermolecular interaction of macrocyclic dications 2(2+) would be the key to realizing a change in the emission pattern, since the color of the molecules did not change by applying mechanical stimuli. These findings may suggest a design strategy for creating a variety of stimuli-responsive materials, especially for carbocation-based fluorescent materials.

学術雑誌論文

Accepted Manuscript

This is the peer reviewed version of the following article:Ishigaki, Yusuke; Tachibana, Takuya; Sugawara, Kazuma; Kikuchi, Moto; Suzuki, Takanori; Bis(triarylmethylium)-type Macrocyclic Dications : Mechanochromic Emission Extending to the Red Region ChemPlusChem 88(3), which has been published in final form at https://doi.org/10.1002/cplu.202300110. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

2192-6506