Please use this identifier to cite or link to this item: https://doi.org/10.1038/ncomms8954
Title: Multiphoton harvesting metal-organic frameworks
Authors: Quah H.S. 
Chen W.
Schreyer M.K.
Yang H. 
Wong M.W. 
Ji W. 
Vittal J.J. 
Keywords: anthracene derivative
ligand
metal organic framework
pyridine derivative
zinc derivative
absorption
electron
energy flux
ligand
luminescence
metal
quantum mechanics
absorption
Article
chemical structure
compression
crystal structure
encapsulation
energy transfer
femtosecond laser
fluorescence
light absorption
moisture
molecule
photoluminescence
photon
powder
quantum yield
solid state
synthesis
X ray powder diffraction
Issue Date: 2015
Publisher: Nature Publishing Group
Citation: Quah H.S., Chen W., Schreyer M.K., Yang H., Wong M.W., Ji W., Vittal J.J. (2015). Multiphoton harvesting metal-organic frameworks. Nature Communications 6 : 7954. ScholarBank@NUS Repository. https://doi.org/10.1038/ncomms8954
Abstract: Multiphoton upconversion is a process where two or more photons are absorbed simultaneously to excite an electron to an excited state and, subsequently, the relaxation of electron gives rise to the emission of a photon with frequency greater than those of the absorbed photons. Materials possessing such property attracted attention due to applications in biological imaging, photodynamic therapy, three-dimensional optical data storage, frequency-upconverted lasing and optical power limiting. Here we report four-photon upconversion in metal-organic frameworks containing the ligand, trans, trans-9,10-bis(4-pyridylethenyl)anthracene. The ligand has a symmetrical acceptor-Ï €-donor-Ï €-acceptor structure and a singlet biradical electronic ground state, which boosted its multiphoton absorption cross-sections. We demonstrate that the upconversion efficiency can be enhanced by Förster resonance energy transfer within host-guest metal-organic frameworks consisting of encapsulated high quantum yielding guest molecules. Using these strategies, metal-organic framework materials, which can exhibit frequency-upconverted photoluminescence excited by simultaneous multiphoton absorption, can be rationally designed and synthesized. © 2015 Macmillan Publishers Limited. All rights reserved.
Source Title: Nature Communications
URI: https://scholarbank.nus.edu.sg/handle/10635/175492
ISSN: 20411723
DOI: 10.1038/ncomms8954
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