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- Title
Modulation of Properties by Ion Changing Based on Luminescent Ionic Salts Consisting of Spirobi(boron ketoiminate).
- Authors
Suenaga, Kazumasa; Ito, Shunichiro; Tanaka, Kazuo; Chujo, Yoshiki
- Abstract
We report development of luminescent ionic salts consisting of the boron ketoiminate structure, which is one of the robust skeletons for expressing aggregation-induced emission (AIE) properties. From the formation of the boron-centered spiro structure with the ketoiminate ligands, we obtained stable ionic salts with variable anions. Since the ionic salts show Tms below 100 °C, it was shown that these salts can be classified as an ionic liquid. By using PF6 anion, the single crystal—which is applicable for X-ray crystallography—was obtained. According to the optical measurements, it was proposed that electronic interaction should occur through the boron center. Moreover, intense emission was observed both in solution and solid. Finally, we demonstrated that the emission color of the PF6 salt was altered from crystal to amorphous by adding mechanical forces. Based on boron complexation and intrinsic solid-state luminescent characters, we achieved obtainment of emissive ionic materials with environmental responsivity.
- Subjects
LUMINESCENCE; BORON; X-ray crystallography; OPTICAL measurements; SALTS; IONIC liquids
- Publication
Molecules, 2022, Vol 27, Issue 11, p3438
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules27113438