An insight study into the parameters altering the emission of a covalent triazine framework

Journal article

Covalent triazine frameworks (CTFs) synthesized through nucleophilic substitution of 4,4’ bipyridine on the carbon atoms of cyanuric chloride were studied as fluorescent sensors. The band gap of the materials was calculated to be 2.95 eV from diffuse reflectance measurements, while from the adsorption in aqueous dispersions, we obtained the value of 3.7 eV. A partial exfoliation of the layered CTFs in water or tetrahydrofuran led to different morphologies, increased emission lifetime and fluorescence quantum yield. The pattern of their light emission properties in combination with their redox states was defined with the addition of a series of acidic and basic analytes. Another unique aspect of these semiconducting materials is the induced aggregation and the subsequent enhancement of emission under ultraviolet illumination.

Authors: Bika, P; Osokin, V; Giannakopoulou, T; Todorova, N; Li, M

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Royal Society of Chemistry
• Journal: Journal of Materials Chemistry C Materials for optical and electronic devices
• Volume: 9
• Pages: 13770-13781
• Publication date: 2021-08-31
• Acceptance date: 2021-08-30
• DOI: 10.1039/d1tc02985a
• EISSN: 2050-7534
• ISSN: 2050-7526
• Language: English
• Keywords: FFR