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Enhanced Resonance Energy Transfer and White-Light Emission from Organic Fluorophores and Lanthanides in Dendron-based Hybrid Hydrogel
Sivalingam Soumya,
Published in American Chemical Society
2016
Volume: 8
   
Issue: 12
Pages: 8068 - 8075
Abstract
In this paper, we have investigated the use of poly(aryl ether) dendron-based gel as a medium for resonance energy transfer (RET) from organic donors (phenanthrene, naphthalene, and pyrene) to lanthanide [Eu(III) and Tb(III)] ions. The gel has been prepared through self-assembly of glucose-cored poly(aryl ether) dendrons in a dimethyl sulfoxide/water mixture (1:9 v/v). The efficiency of RET was calculated by metal-centered emission quantum yield measurements in the gel medium. While there was no resonance energy transfer observed between the donor-acceptor pairs in solution, efficient RET has been observed in the gel medium. The metal-centered quantum yield values were 11.9% for phenanthrene-Eu(III), 3.9% for naphthalene-Eu(III), and 3.6% for pyrene-Eu(III) systems. Partial RET in the system has been utilized to generate white-light emission from the gel by incorporating an additional lanthanide ion, Tb(III), along with the organic donors and Eu(III). The CIE (Commission Internationale d'Eclairage) coordinates obtained for gels formed by phenanthrene-Tb(III)-Eu(III) (PTE), naphthalene-Tb(III)-Eu(III) (NTE), and pyrene-Tb(III)-Eu(III) (PyTE) were (0.33, 0.32) for PTE, (0.35, 0.37) for NTE, and (0.35, 0.33) for PyTE. The correlated color temperatures (CCT) for white-light-emitting gels were calculated, and the values (5520 K for PTE, 4886 K for NTE, and 4722 K for PyTE) suggest that the system generates cool white light. (Graph Presented). © 2016 American Chemical Society.
About the journal
JournalData powered by TypesetACS Applied Materials and Interfaces
PublisherData powered by TypesetAmerican Chemical Society
ISSN19448244
Open AccessNo
Concepts (23)
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    Anthracene
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    Dendrimers
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    Dimethyl sulfoxide
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    Energy transfer
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    Ethers
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    Gels
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    Hydrogels
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    Light emission
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    Naphthalene
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    Pyrene
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    Quantum yield
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    Rare earth elements
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    Resonance
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    Self assembly
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    COMMISSION INTERNATIONALE D'ECLAIRAGE
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    Correlated color temperature
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    DENDRONS
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    Donor-acceptor pairs
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    HYBRID HYDROGELS
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    METAL-CENTERED EMISSION
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    Resonance energy transfer
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    WHITE LIGHT-EMITTING
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    Europium