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A Luminescent Metal–Organic Framework Thermometer with Intrinsic Dual Emission from Organic Lumophores
Author(s) -
Zhang Hao,
Lin Chensheng,
Sheng Tianlu,
Hu Shengmin,
Zhuo Chao,
Fu Ruibiao,
Wen Yuehong,
Li Haoran,
Su Shaodong,
Wu Xintao
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201504432
Subject(s) - thermometer , luminescence , excited state , metal organic framework , energy transfer , boltzmann constant , thermal , chemistry , materials science , optoelectronics , analytical chemistry (journal) , chemical physics , thermodynamics , atomic physics , physics , organic chemistry , adsorption
A new mixed‐ligand metal–organic framework (MOF), ZnATZ‐BTB, has been constructed as a luminescent ratiometric thermometer by making use of the intrinsic dual emission at cryogenic temperatures. Its twofold interpenetrated network promotes the Dexter energy transfer (DET) between the mixed organic lumophores. The temperature‐dependent luminescent behavior arises from the thermal equilibrium between two separated excited states coupled by DET, which is confirmed by Boltzmann distribution fitting. The small excited‐state energy gap allows ZnATZ‐BTB to measure and visualize cryogenic temperatures (30–130 K) with significantly high relative sensitivity (up to 5.29 % K −1 at 30 K). Moreover, it is the first example of a ratiometric MOF thermometer the dual emitting sources of which are widely applicable mixed organic ligands, opening up new opportunities for designing such devices.