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Tandem Förster Resonance Energy Transfer Induced Luminescent Ratiometric Thermometry in Dye‐Encapsulated Biological Metal–Organic Frameworks
Author(s) -
Cai Hong,
Lu Weigang,
Yang Chen,
Zhang Ming,
Li Mian,
Che ChiMing,
Li Dan
Publication year - 2019
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201801149
Subject(s) - lanthanide , luminescence , materials science , fluorescence , tandem , förster resonance energy transfer , energy transfer , excited state , metal organic framework , photochemistry , ion , nanotechnology , optoelectronics , chemistry , chemical physics , organic chemistry , optics , atomic physics , physics , adsorption , composite material
Luminescent ratiometric thermometers (LRTs) based on the emission intensity ratio with self‐reference functions guarantee a temperature sensing of fast response, high precision, and excellent spatial resolution. For monitoring temperature at the cellular level, the use of metal–organic frameworks (MOFs) as probes, especially biocompatible ones, is still in its nascency. By employing a biological MOF, Zn 3 (benzene‐1,3,5‐tricarboxyl) 2 (adenine)(H 2 O) (ZnBTCA), as a host and thermosensitive fluorescent dyes as guests, a series of dye@ZnBTCA is synthesized and studied as potential LRT materials, featuring a unique mechanism of tandem Förster resonance energy transfer among the MOF host and the multiple dye guests. This scenario is significantly different from the commonly reported lanthanide or mixed‐lanthanide MOFs where energy transfer occurs between lanthanide ions. Acf‐RB@ZnBTCA, in particular, not only exhibits highly efficient ratiometric temperature‐sensing properties under physiological cellular conditions but also can be excited under visible light.