Photon upconverting liquids

Matrix-free molecular upconversion systems functioning in air

Research output: Contribution to journalArticle

137 Citations (Scopus)

Abstract

A nonvolatile, in-air functioning liquid photon upconverting system is developed. A rationally designed triplet sensitizer (branched alkyl chain-modified Pt(II) porphyrin) is homogeneously doped in energy-harvesting liquid acceptors with a 9,10-diphenylanthracene unit. A significantly high upconversion quantum yield of ∼28% is achieved in the solvent-free liquid state, even under aerated conditions. The liquid upconversion system shows a sequence of efficient triplet energy transfer and migration of two itinerant excited states which eventually collide with each other to produce a singlet excited state of the acceptor. The observed insusceptibility of upconversion luminescence to oxygen indicates the sealing ability of molten alkyl chains introduced to liquefy chromophores. The involvement of the energy migration process in triplet-triplet annihilation (TTA) provides a new perspective in designing advanced photon upconversion systems.

Original languageEnglish
Pages (from-to)19056-19059
Number of pages4
JournalJournal of the American Chemical Society
Volume135
Issue number51
DOIs
Publication statusPublished - Dec 26 2013

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Photons
Air
Energy Transfer
Porphyrins
Liquids
Luminescence
Excited states
Oxygen
Energy harvesting
Quantum yield
Chromophores
Energy transfer
Molten materials
9,10-diphenylanthracene

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Photon upconverting liquids : Matrix-free molecular upconversion systems functioning in air. / Duan, Pengfei; Yanai, Nobuhiro; Kimizuka, Nobuo.

In: Journal of the American Chemical Society, Vol. 135, No. 51, 26.12.2013, p. 19056-19059.

Research output: Contribution to journalArticle

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