Developing Luminescent Ratiometric Thermometers Based on a Covalent Organic Framework (COF)

A. M. Kaczmarek, Liu Y. -Y., M. K. Kaczmarek, H. Liu, FLAVIA ARTIZZU, L. D. Carlos, Der Voort P. Van

Research output: Contribution to journalArticlepeer-review

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.
Original languageEnglish
Pages (from-to)1932-1940
Number of pages9
JournalAngewandte Chemie - International Edition
Volume59
Issue number5
DOIs
Publication statusPublished - 2020

Keywords

  • Covalent Organic Frameworks
  • Lanthanides
  • Quenching
  • Ratiometric Thermometers
  • Sensors

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