jp7b08268_si_001.pdf (4.02 MB)
Macroscopic Wires from Fluorophore-Quencher Dyads with Long-Lived Blue Emission
journal contribution
posted on 2017-08-30, 00:00 authored by Tao Wang, Ziye Wu, Wei Sun, Shengye Jin, Xingyuan Zhang, Chuanyao Zhou, Jun Jiang, Yi Luo, Guoqing ZhangWe report the formation of macroscopic
wires up to centimeters
in length from a series of structurally flexible, covalently tethered
small-molecular fluorophore-quencher dyads (FQDs, average MW = 425
Da), comprised of carbazole, melatonin, and cyanobenzoate moieties.
These FQDs are nonemissive in organic solutions but become moderately
to highly luminescent (ΦF = 0.037–0.39) upon
formation of wires with emission maxima in the blue region (446–483
nm). The blue photoluminescence (PL) is ascribed to a combination
of singlet charge transfer, localized triplet state, and possibly
delayed fluorescence emissions with intrinsic luminescence lifetimes
ranging from 0.228 to 21333 μs, based on luminescence, transient
absorption measurements, X-ray diffraction, and calculations.
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luminescence lifetimescalculationseries21333 μFQDcyanobenzoate moietiesmelatoninFluorophore-Quencher Dyadsmacroscopic wiressinglet charge transfernmcarbazoletriplet stateDaphotoluminescencePLemission maximacombinationMWformationabsorption measurementsX-ray diffractionMacroscopic Wires0.228small-molecular fluorophore-quencher dyadsnonemissiveregionsolutionLong-Lived Blue Emissionlengthfluorescence emissionscovalently
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