Synthesis, Electrochemical Behavior, and Electronic Properties of Hyperbranched Poly(p-methylenetriphenylamine): An Unexpected Condensation Polymerization from N-[4-(Tosyloxybutyloxymethyl)phenyl]-N,N-diphenylamine
Resource
Macromolecules 41 (12): 4158-4164
Journal
Macromolecules
Journal Volume
41
Journal Issue
12
Pages
4158-4164
Date Issued
2008
Date
2008
Author(s)
Abstract
N-[4-Tosyloxybutyloxymethyl]phenyl]-N,N-diphenylamine showed unexpected chemical reactivity and polymerized to form hyperbranched poly(p- methylenetriphenylamine) (PMTPA) under neat conditions. The hyperbranched PMTPA was electrochemically active and could be deposited on electrode surface when oxidized. The SEM study revealed that electropolymerization of PMTPA would form uniform coating on ITO surface. Polymeric light-emitting diodes (PLEDs) employing the electroactive hyperbranched PMTPA as hole-transport layer in ITO/electrochemically polymerized HTL/EML(PVK-PBD-Ir(ppy)3)/Mg/Ag demonstrated the brightness over 20 000 cd/m2 and low turn-on voltage. In particular, the device performance was very steady regardless of the thickness of the PMTPA layer, ranging from 4 to 10 nm. © 2008 American Chemical Society.
Type
journal article
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