Issue 3, 2010
From the journal:

Dalton Transactions

Linear and star-shaped benzimidazolyl derivatives: syntheses, photophysical properties and use as highly efficient electron transport materials in OLEDs†

Wade White,a   Zachary M. Hudson,a   Xiaodong Feng,b   Sijin Han,b   Zheng-Hong Lub  and  Suning Wang*a  

* Corresponding authors

a Department of Chemistry, Queen's University, Kingston, Ontario, Canada
E-mail: suning.wang@queensu.ca

b Department of Materials Science and Engineering, University of Toronto, Toronto, Ontario, Canada

Abstract

Five benzimidazolyl functionalized linear and star-shaped molecules have been synthesized using Ullmann condensation methods. These molecules all possess deep LUMO energy levels and large HOMO–LUMO energy gaps ranging from 3.55 to 3.95 eV. All five compounds are fluorescent with emission in the UV region, and display high thermal and morphological stability. One of these star-shaped molecules, 2,4,5-tris(benzimidazolyl)-1,3,5-triazine, has been demonstrated to be a highly effective electron transport/hole blocking material in organic light emitting devices (OLEDs) with performance comparable to the commonly used electron transport material Alq3 (q = 8-hydroxyquinolinate). In addition, metal ion titrations have established that these ligands show a distinct fluorescent response to the addition of Ag(I) or Zn(II) in solution.

Graphical abstract: Linear and star-shaped benzimidazolyl derivatives: syntheses, photophysical properties and use as highly efficient electron transport materials in OLEDs

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Article information

DOI
https://doi.org/10.1039/B918203A
Article type
Paper
Submitted
03 Sep 2009
Accepted
08 Oct 2009
First published
16 Nov 2009

Dalton Trans., 2010,39, 892-899

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Linear and star-shaped benzimidazolyl derivatives: syntheses, photophysical properties and use as highly efficient electron transport materials in OLEDs

W. White, Z. M. Hudson, X. Feng, S. Han, Z. Lu and S. Wang, Dalton Trans., 2010, 39, 892 DOI: 10.1039/B918203A

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