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Luminescent Sensing of Oxygen Using a Quenchable Probe and Upconverting Nanoparticles
Author(s) -
Achatz Daniela E.,
Meier Robert J.,
Fischer Lorenz H.,
Wolfbeis Otto S.
Publication year - 2011
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201004902
Subject(s) - luminescence , iridium , luminescent measurements , molecular oxygen , nanoparticle , oxygen , laser , nanotechnology , cellulose , materials science , chemistry , optoelectronics , optics , physics , organic chemistry , catalysis
Turned off by oxygen : Luminescent upconverting nanoparticles (UCNPs) of the type NaYF 4 :Yb,Tm are employed in an entirely new type of optical sensor for oxygen (see picture). Upon laser excitation at 980 nm, these UCNPs act as nanolamps, the blue emission of which is used to photoexcite an iridium complex dissolved in ethyl cellulose. Its green emission, in turn, is dynamically and fully reversibly quenched by molecular oxygen.