Donor-Acceptor Interactions in Red-Emitting Thienylbenzene-Branched Dendrimers with Benzothiadiazole Core
Resource
Chemistry-A European Journal 14 (35): 11231-11241
Journal
Chemistry-A European Journal
Pages
11231-11241
Date Issued
2008
Date
2008
Author(s)
Justin Thomas, K. R.
Huang, Tai-Hsiang
Lin, Jiann T.
Pu, Shin-Chien
Cheng, Yi-Ming
Hsieh, Cheng-chih
Abstract
Synthesis and characterization of dendrimers containing thienylbenzene repeating units, red-emitting benzothiadiazole core, and triarylamine peripheries that bear naphthyl units are reported. The relevant dendrimers of different generations are classified as Gnb (n = 1-3), while the tert-butyl dendrimers Gna with the acceptor alone were also synthesized to serve as control chromophores that avoid donor-acceptor interactions. The resulting dendrimers are capable of harvesting photon energy through efficient energy transfer among donor-acceptor moieties, so that highly luminescent red fluorophores result. Transient fluorescence studies suggest that the energy transfer and its efficiency are approximately unity in all G a dendrimers, whereas the rate of energy transfer for the G b dendrimers is suppressed, that is, charge transfer from the core to the periphery is a significant quenching pathway. These dendrimers are amorphous in nature with high glass transition temperatures (176-201°C). Electroluminescent devices were fabricated by using the dendrimers as hole-transporting emitters, and the devices exhibit promising red emission parameters. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.
Subjects
Charge transfer; Dendrimers; Donor-acceptor systems; Energy harvesting; Luminescence
SDGs
Other Subjects
Charge transfer; Chromophores; Electroluminescence; Energy transfer; Flow interactions; Fluorescence; Glass transition; Harvesting; Ion exchange; Light emission; Luminescence; Luminescent devices; Mass transfer; Optoelectronic devices; Photovoltaic effects; Polymer blends; Quenching; Synthesis (chemical); Acceptor moieties; Benzothiadiazole; Donor-acceptor systems; Efficient energy transfers; Electroluminescent devices; Energy harvesting; Fluorescence studies; Glass transition temperatures; Photon energies; Red emissions; Synthesis and characterizations; Triaryl amines; Dendrimers
Type
journal article
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