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A Novel Blue Light Emitting Materials Based on the Triphenylamine Core

Danuta Sek ,  Agnieszka Iwan ,  Bozena Kaczmarczyk ,  Zbigniew Mazurak ,  Henryk Bednarski 

Polish Academy of Sciences, Centre of Polymer Chemistry, M. Sklodowskiej-Curie 34, Zabrze 41-819, Poland


In this communication, we will report the synthesis and detailed chemical and optical (UV-Vis and PL) characterizations and also a molecular dynamic calculations of two types of p-conjugated organic compounds having triphenylamine moieties for the field of optoelectronics: azomethine organic compounds vs. ionically self-organized azomethine-Bronsted acid supramolecules in which the side-groups (i.e. functionalized sulfonic acids (methanesulfonic acid: MSA or camphorosulfonic acid: CSA) or phenols (m-cresol: MC or p-chlorophenol: PClPh) are connected to the azomethine backbone by non-covalent ionic-type (acid-base: protonation of the CH=N units by the SO3H groups of the MSA or CSA or by H-bond formation of MC or PClPh derivative used in this study) interactions. Photoluminescence of the model compound was observed at 460 nm in chloroform solution and intensity of the emission band was found to be concentration dependent-increased with dilution from 10-3mol/l to 10-5mol/l and then decreased. The protonation of the azomethine cause little blue shift of the emission band along with huge increase of the photoluminescence intensity. The similar relations were also observed for polymer synthesized from the 4,4'-diformyltriphenylamine and 4,4'-oxydianiline. The polymer formed transparent, flexible foil and emitted light at 468 nm being good material for blue light emitting diodes.


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Related papers

Presentation: poster at 18th Conference on Physical Organic Chemistry, Posters, by Agnieszka Iwan
See On-line Journal of 18th Conference on Physical Organic Chemistry

Submitted: 2006-05-23 10:07
Revised:   2009-06-07 00:44