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Issue 8, 2016
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Triplet energy migration-based photon upconversion by amphiphilic molecular assemblies in aerated water

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Abstract

A molecular self-assembly approach is developed to resolve an outstanding issue in triplet energy migration-based photon upconversion (TEM-UC), that is, air-stable TEM-UC in water. Amphiphilic cationic acceptor (emitter) molecules self-assemble in water via hydrophobic and hydrogen bonding interactions, with which anionic donor (sensitizer) molecules are integrated through electrostatic interactions. Triplet energy is quantitatively transferred from the excited donor to the acceptor, which is followed by effective triplet energy migration among the pre-organized acceptors. It leads to TTA and concomitant UC emission in water. The dense acceptor chromophore arrays with extended hydrogen bonding networks show efficient barrier properties against molecular oxygen, as demonstrated by the stable UC emission even in air-saturated water.

Graphical abstract: Triplet energy migration-based photon upconversion by amphiphilic molecular assemblies in aerated water

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Publication details

The article was received on 06 Mar 2016, accepted on 17 Apr 2016 and first published on 18 Apr 2016


Article type: Edge Article
DOI: 10.1039/C6SC01047D
Citation: Chem. Sci., 2016,7, 5224-5229
  • Open access: Creative Commons BY license
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    Triplet energy migration-based photon upconversion by amphiphilic molecular assemblies in aerated water

    H. Kouno, T. Ogawa, S. Amemori, P. Mahato, N. Yanai and N. Kimizuka, Chem. Sci., 2016, 7, 5224
    DOI: 10.1039/C6SC01047D

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