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http://dx.doi.org/10.5012/bkcs.2014.35.2.513

Synthesis and Characterization of 1,2,4-Oxadiazole-Based Deep-Blue and Blue Color Emitting Polymers  

Agneeswari, Rajalingam (Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University)
Tamilavan, Vellaiappillai (Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University)
Hyun, Myung Ho (Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University)
Publication Information
Bulletin of the Korean Chemical Society / v.35, no.2, 2014 , pp. 513-517 More about this Journal
Abstract
Two donor-acceptor-donor monomers such as 3,5-bis(4-bromophenyl)-1,2,4-oxadiazole (BOB) and 3,5-bis(5-bromothiophen-2-yl)-1,2,4-oxadiazole (TOT) incorporating electron transporting and hole blocking 1,2,4-oxadiazloe moiety were copolymerized with light emitting fluorene derivative via Suzuki polycondensation to afford two new polymers, PFBOB and PFTOT, respectively. The optical studies for polymers PFBOB and PFTOT revealed that the band gaps are 3.10 eV and 2.72 eV, respectively, and polymer PFBOB exhibited a deep-blue emission while polymer PFTOT showed blue emission in chloroform and as thin film. The photoluminescence quantum efficiencies (${\Phi}_f$) of polymers PFBOB and PFTOT in chloroform calculated against highly blue emitting 9,10-diphenylanthracene (DPA, ${\Phi}_f=0.90$) were 1.00 and 0.44, respectively.
Keywords
Copolymers; 1,2,4-Oxadiazole; Fluorene; Blue emissive polymers;
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