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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 306-307Studies on Donor-Acceptor Substituted with...

Studies on Donor-Acceptor Substituted with Triphenylamine-Core Fluorescent Derivatives

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Abstract:

A series of donor-acceptor (D-A) substituted with triphenylamine-core fluorescent derivatives have been synthesized via nucleophilic addition of Grignard reagent to 2,7-dibromo-9-fluorenone, CF₃SO₃H-promoted Friedel-Crafts reaction, Ullmann coupling reaction, and Pd-catalyzed Suzuki cross-coupling reaction in turn. Aromatic imide (N-phthalimide) group was firstly introduced as electron acceptor in the donor-π-acceptor (D-π-A) opto-electronic materials. Hole-injection capability of the fluorene derivatives were promoted by introducing 4-methyl-triphenylamine (MTPA) group at the 9-position. All these compounds present excellent solubility and thermal stability (with glass transition temperature of 191-279 °C), thermo gravimetric analysis (TGA) indicated that 5% or 10% weight losses occurred at about 415-463 °C or 427-498 °C respectively. The relationship of the solvent polarity or the conjugation length of the D-A structure with the luminescent properties has been studied by the UV-vis spectra and the fluorescent spectra. The CV data revealed that these fluorescent derivatives are possessed low-lying HOMO energy levels ranging from -5.19 to -5.37 eV and are exhibited strong blue-green luminance around 448-546 nm.

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Periodical:

Advanced Materials Research (Volumes 306-307)

Pages:

280-288

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.306-307.280

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Online since:

August 2011

Authors:

Cai Qi Zhou, Bin Hu, Cui Hong Li, Qian Ping Lou, Qing Bao Song, Cheng Zhang

Keywords:

Coupling Reaction, D-π-A Structure, Electrical Properties, N-Phthalimide, Photophysical Property, Triphenylamine-Core

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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