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Luminescent Nanothermometers Obtained by Post‐Synthetic Modification of Metal‐Organic Framework MIL‐68
Author(s) -
Abdelhameed Reda M.,
Ananias Duarte,
Silva Artur M. S.,
Rocha João
Publication year - 2019
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201900110
Subject(s) - lanthanide , luminescence , metal organic framework , chemistry , butane , metal , metal ions in aqueous solution , inorganic chemistry , nanotechnology , ion , coordination sphere , combinatorial chemistry , organic chemistry , catalysis , materials science , optoelectronics , adsorption
Metal‐organic frameworks (MOFs) bearing lanthanide ions are excellent platforms for designing luminescent thermometers. However, so far, post‐synthetic modification of MOFs linkers has not been explored as a route to produce such thermometers, despite its potential to design the lanthanide coordination sphere and, thus, tune the emission properties of the material. Here, nanocrystals of MIL‐68‐NH 2 were post‐synthetically modified via a cross‐linking reaction with 1,4‐Bis{4‐[( E )‐3‐( N , N ‐dimethylamino)prop‐2‐enoyl]phenoxy}butane (HL), followed by coordination to Eu 3+ and Tb 3+ ions. The luminescence properties of the material were assessed. Tb 90 Eu 10 ‐MIL‐68‐HL was found to be an excellent cryogenic (< 100 K) ratiometric luminescent nanothermometer exhibiting a maximum relative sensitivity of 9.4 % K –1 at 12 K.