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Self‐Assembled Bright Luminescent Lanthanide‐Organic Polyhedra for Ratiometric Temperature Sensing
Author(s) -
Guo XiaoQing,
Zhou LiPeng,
Cai LiXuan,
Sun QingFu
Publication year - 2018
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.201801132
Subject(s) - lanthanide , luminescence , moiety , conjugated system , materials science , molecule , metal organic framework , chemistry , crystallography , photochemistry , stereochemistry , organic chemistry , polymer , optoelectronics , adsorption , ion
Luminescent lanthanide‐containing compounds have a lot of stimulating applications. However, the fine‐tuning of the optical properties of multi‐nuclear lanthanide edifices is still a big challenge. We report here the coordination self‐assembly of a group of bright luminescent lanthanide organic polyhedra ( LOPs ) with record high emission quantum yields, by using two fully‐conjugated ligands featuring the triazole‐pyridine‐amido ( tpa ) chelating moiety, easily‐accessible from the “Click” reaction. The self‐assembled LOPs are characterized by NMR spectroscopy, high‐resolution ESI‐TOF‐MS, and X‐ray crystallography. Interestingly, inter‐metal energy transfer (ET) is confirmed on the mixed‐lanthanide polyhedral molecules, though the metal centers are separated nearly 2 nm apart. A feasible ratiometric luminescent thermometer, with work range from cryogenic to physiological temperatures, has been demonstrated with the mixed Eu/Tb LOPs . We envisage these molecular‐level bright luminescent LOPs have great application potential in displaying, labelling/imaging, up‐conversion materials etc.