the enhanced intramolecular energy transfer and strengthened ff luminescence of a stable helical eu complex in ionic liquids

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ID: 209535
2018
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Abstract
The luminescence of a Eu complex (EuL) is enhanced by stabilization of the coordination structure in highly viscous ionic liquids. The EuL was found to maintain a stable single helical structure both in organic solvents and in the ionic liquids [BMIM][PF6] and [EMIM][PF6]. A colorless solution of EuL dissolved in [BMIM][PF6] exhibits bright red luminescence with a quantum yield of 32.3%, a value that is much higher than that in acetonitrile (12%). Estimated rate constants for the energy relaxation pathway indicate that the energy transfer efficiency is enhanced in [BMIM][PF6] as a result of the suppression of molecular fluctuations in the ligands. Additionally, a highly luminescent helical structure is preserved in [EMIM][PF6] up to 120 °C.
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hasegawa2018moleculesthe Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Yuki Hasegawa;Ayumi Ishii;Yudai Inazuka;Naho Yajima;Shogo Kawaguchi;Kunihisa Sugimoto;Miki Hasegawa
Journal Journal of ethnopharmacology
Year 2018
DOI
10.3390/molecules23020055
URL
http://www.mdpi.com/1420-3049/23/2/55
Keywords
ionic liquid energy transfer luminescence

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