Base-induced multi-state fluorescence of a trefoil-shaped salicylaldehyde azine derivative. Issue 39 (7th July 2021)

• Record Type: Journal Article
• Authors: Taniguchi, Noriho; Naito, Masaya; Miyagawa, Shinobu; Tokunaga, Yuji
• Is Part Of: RSC advances. Volume 11:Issue 39(2021)
• Page Start: 24022
• Page End: 24026
• Publication Date: 2021-07-07
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra02627e
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Base-induced four-state fluorescence is demonstrated in a trefoil-shaped salicylaldehyde azine derivative bearing multiple acidic protons. Abstract : A trefoil-shaped salicylaldehyde azine derivative bearing multiple acidic protons displays base-induced multi-state luminescence. The azine was prepared through the reaction of 1, 3, 5-triformylphloroglucinol with 4-methoxysalicylaldehyde hydrazone. 1 H NMR spectroscopy revealed that the azine existed in solution at room temperature as an equilibrium mixture of two geometric isomers. The three-step deprotonation (four-state change) of the azine in solution was confirmed using 1 H NMR, UV-vis absorption, and emission spectroscopy.