Lanthanide-Organic Framework Nanothermometers Prepared by Spray-Drying

authors	Wang, ZP; Ananias, D; Carne-Sanchez, A; Brites, CDS; Imaz, I; Maspoch, D; Rocha, J; Carlos, LD
nationality	International
journal	ADVANCED FUNCTIONAL MATERIALS
keywords	CRYOGENIC TEMPERATURE-MEASUREMENT; NANOSCALE THERMOMETRY; COORDINATION POLYMERS; DRUG-DELIVERY; LUMINESCENCE; SENSORS; NANOPARTICLES; PHOTOLUMINESCENCE; NANOCRYSTALS; FLUORESCENCE
abstract	Accurate, noninvasive, and self-referenced temperature measurements at the sub-micrometer scale are of great interest, prompted by the ever-growing demands in the fields of nanotechnology and nanomedicine. The thermal dependence of the phosphor's luminescence provides high detection sensitivity and spatial resolution with short acquisition times in, e.g., biological fluids, strong electromagnetic fields, and fast-moving objects. Here, it is shown that nanoparticles of [(Tb-0.914 Eu-0.086)(2)(PDA)(3)(H2O)]center dot 2H(2)O (PDA = 1,4-phenylenediacetic acid), the first lanthanide-organic framework prepared by the spray-drying method, are excellent nanothermometers operating in the solid state in the 10-325 K range (quantum yield of 0.25 at 370 nm, at room temperature). Intriguingly, this system is the most sensitive cryogenic nanothermometer reported so far, combining high sensitivity (up to 5.96 +/- 0.04% K-1 at 25 K), reproducibility (in excess of 99%), and low-temperature uncertainty (0.02 K at 25 K).
publisher	WILEY-V C H VERLAG GMBH
issn	1616-301X
year published	2015
volume	25
issue	19
beginning page	2824
ending page	2830
digital object identifier (doi)	10.1002/adfm.201500518
web of science category	Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter
subject category	Chemistry; Science & Technology - Other Topics; Materials Science; Physics
unique article identifier	WOS:000354626800004