A Ratiometric Afterglow Response of Aluminium Ions in Methanol‐Water. Issue 16 (30th June 2022)

• Record Type: Journal Article
• Authors: Koga, Ayumi; Kawaguchi, Kaede; Maida, Margarita Claudya; Kubo, Yuji
• Is Part Of: Chemistry, an Asian journal. Volume 17:Issue 16(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-06-30
• Subjects: Phosphorescence -- Afterglow -- Chemosensor -- Boronic acid -- Energy transfer; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/asia.202200402
• Languages: English
• ISSNs: 1861-4728

Abstract

Abstract: An afterglow is beneficial as an emission signal in the field of displays and imaging probes. Here, boronic acid‐appended and spirolactam ring‐containing rhodamine dye 1 was synthesized and grafted onto the surface of room‐temperature phosphorescence‐active boronate nanoparticles (BP s), composed of polymeric 3‐benzo‐2, 4, 8, 10‐tetraoxa‐3, 9‐diboraspiro[5.5]undecane. The resultant ensemble, 1@BP, exhibited a greenish afterglow. However, the addition of Al 3+ into the dispersion solution with 1@BP led to a change in the afterglow to grass green as a result of Förster‐type energy transfer from the phosphorescent BP to the Al 3+ ‐interacting rhodamine dye 1 on the surface. Based on the ratio of the two emission intensities, a linear response in the concentration range of 3.8–15.2 μM was observed, with a detection limit of 4.2 μM for Al 3+ . A metal ion‐dependent discernable color in afterglow was observed on a 1@BP ‐coated filter paper, which would be useful for not only film‐based afterglow chemosensors but also encryption application. Abstract : A boronic acid‐appended and spirolactam ring‐containing rhodamine dye was synthesized and grafted onto the surface of RTP‐active boronate nanoparticles. The addition of Al 3+ into the dispersion solution of the resultant ensemble 1@BP in MeOH/H2 O (95 : 5 v/v) led to a change in the afterglow, enabling visually detection of the metal ion after ceasing irradiation light.