Two-Photon Oxygen Sensing with Quantum Dot-Porphyrin Conjugates
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Bawendi_Two-photon.pdf
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Author(s)
Lemon, Christopher M.
Karnas, Elizabeth
Bawendi, Moungi G.
Nocera, Daniel G.
Date Issued
August 2013
Journal
Inorganic Chemistry
Publisher
American Chemical Society (ACS)
Citation
Lemon, Christopher M., Elizabeth Karnas, Moungi G. Bawendi, and Daniel G. Nocera. “Two-Photon Oxygen Sensing with Quantum Dot-Porphyrin Conjugates.” Inorg. Chem. 52, no. 18 (September 16, 2013): 10394–10406.
Version
Author's final manuscript
Abstract
Supramolecular assemblies of a quantum dot (QD) associated to palladium(II) porphyrins have been developed to detect oxygen (pO[subscript 2]) in organic solvents. Palladium porphyrins are sensitive in the 0–160 Torr range, making them ideal phosphors for in vivo biological oxygen quantification. Porphyrins with meso pyridyl substituents bind to the surface of the QD to produce self-assembled nanosensors. Appreciable overlap between QD emission and porphyrin absorption features results in efficient Forster resonance energy transfer (FRET) for signal transduction in these sensors. The QD serves as a photon antenna, enhancing porphyrin emission under both one- and two-photon excitation, demonstrating that QD-palladium porphyrin conjugates may be used for oxygen sensing over physiological oxygen ranges.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1021/ic4011168
