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- Title
Developing Luminescent Ratiometric Thermometers Based on a Covalent Organic Framework (COF).
- Authors
Kaczmarek, Anna M.; Liu, Ying‐Ya; Kaczmarek, Mariusz K.; Liu, Hengshuo; Artizzu, Flavia; Carlos, Luís D.; Van Der Voort, Pascal
- Abstract
Covalent Organic Frameworks (COFs), an emerging class of crystalline porous materials, are proposed as a new type of support for grafting lanthanide ions (Ln3+) and employing these hybrid materials as ratiometric luminescent thermometers. A TpBpy‐COF—prepared from 1,3,5‐triformylphloroglucinol (Tp) and 2,2′‐bipyridine‐5,5′‐diamine (Bpy) grafted with Eu/Tb and Dy acetylacetone (acac) complexes can be successfully used as a luminescent thermometer in the 10–360 K (Eu) and 280–440 K (Tb) ranges with good sensing properties (thermal sensitivity up to 1.403 % K−1, temperature uncertainty δT<1 K above 110 K). For the Eu/Tb systems, we observe an unusual and rarely reported behavior, that is, no thermal quenching of the Tb3+ emission, a result of the absence of ion‐to‐ligand/host energy back‐transfer. The LnCOF materials proposed here could be a new class of materials employed for temperature‐sensing applications following up on the well‐known luminescent metal–organic framework thermometers.
- Subjects
TERBIUM; THERMOMETERS; ORGANIC bases; POROUS materials; METAL-organic frameworks
- Publication
Angewandte Chemie, 2020, Vol 132, Issue 5, p1948
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201913983