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

authors	Kaczmarek, AM; Liu, YY; Kaczmarek, MK; Liu, HS; Artizzu, F; Carlos, LD; Van Der Voort, P
nationality	International
journal	ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
author keywords	Covalent Organic Frameworks; Lanthanides; Quenching; Ratiometric Thermometers; Sensors
keywords	TEMPERATURE-RANGE; NANOPARTICLES; NONCONTACT
abstract	Covalent Organic Frameworks (COFs), an emerging class of crystalline porous materials, are proposed as a new type of support for grafting lanthanide ions (Ln(3+)) and employing these hybrid materials as ratiometric luminescent thermometers. ATpBpy-COF-prepared from 1,3,5-triformyl-phloroglucinol (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 delta T < 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.
publisher	WILEY-V C H VERLAG GMBH
issn	1433-7851
isbn	1521-3773
year published	2020
volume	59
issue	5
beginning page	1932
ending page	1940
digital object identifier (doi)	10.1002/anie.201913983
web of science category	Chemistry, Multidisciplinary
subject category	Chemistry
unique article identifier	WOS:000505284200001