Full Visible Spectrum and White Light Emission with a Single, Input-Tunable Organic Fluorophore

Journal of the American Chemical Society
Andrés ZavaletaJudith Gallucci

Abstract

The blue emission of M2biQ can be tuned to specific wavelengths throughout the visible region by changing the identity of the cation it interacts with. These optical properties are observed in MeCN solution and the solid state. White light is obtained in MeCN by using either the proper ratio of zinc ions or acid. Thus, M2biQ acts as a nearly universal emitter (λem = 468-690 nm) with large Stokes shifts (116-306 nm, Δν̃ = 7,042-11,823 cm-1). Full spectral profiles as well as quantum yields, lifetimes, and the crystal structures of key RGB and yellow emitters are reported. Emission wavelengths correlate with cationic radius, and TD-DFT calculations show that, for 1:1 complexes, the smaller the ion, the shorter the N-cation bond, and the greater the bathochromic emission shift.

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Citations

Apr 13, 2021·Journal of the American Chemical Society·Aleksandr O LykhinLaura Gagliardi

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