Magnetic and luminescent coordination networks based on imidazolium salts and lanthanides for sensitive ratiometric thermometry
authors Farger, P; Leuvrey, C; Gallart, M; Gilliot, P; Rogez, G; Rocha, J; Ananias, D; Rabu, P; Delahaye, E
nationality International
journal BEILSTEIN JOURNAL OF NANOTECHNOLOGY
author keywords coordination network; imidazolium salt; lanthanides; magnetism; thermometry
keywords METAL-ORGANIC FRAMEWORKS; IONIC LIQUIDS; TEMPERATURE-RANGE; SLOW RELAXATION; LIGHT-EMISSION; POLYMERS; MOF; COMPLEXES; FLUORESCENCE; DYSPROSIUM
abstract The synthesis and characterization of six new lanthanide networks [Ln(L)(ox)(H2O)] with Ln = Eu3+, Gd3+, Tb3+ , Dy3+ , Ho3+ and Yb3+ is reported. They were synthesized by solvo-ionothermal reaction of lanthanide nitrate Ln(NO3)(3)center dot xH(2)O with the 1,3-bis(carboxymethyl)imidazolium [HE] ligand and oxalic acid (H(2)ox) in a water/ethanol solution. The crystal structure of these compounds has been solved on single crystals and the magnetic and luminescent properties have been investigated relying on intrinsic properties of the lanthanide ions. The synthetic strategy has been extended to mixed lanthanide networks leading to four isostructural networks of formula [Tb1-xEux(L)(ox)(H2O)] with x = 0.01, 0.03, 0.05 and 0.10. These materials were assessed as luminescent ratiometric thermometers based on the emission intensities of ligand, Tb3+ and Eu3+ . The best sensitivities were obtained using the ratio between the emission intensities of Eu3+ (D-5(0) -> F-7(2) transition) and of the ligand as the thermometric parameter. [Tb0.97Eu0.03 (L)(ox)(H2O)] was found to be one of the best thermometers among lanthanide-bearing coordination polymers and metal-organic frameworks, operative in the physiological range with a maximum sensitivity of 1.38%.K-1 at 340 K.
publisher BEILSTEIN-INSTITUT
issn 2190-4286
year published 2018
volume 9
beginning page 2775
ending page 2787
digital object identifier (doi) 10.3762/bjnano.9.259
web of science category Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied
subject category Science & Technology - Other Topics; Materials Science; Physics
unique article identifier WOS:000448784100001
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