New P-type of poly(4-methoxy-triphenylamine)s derived by coupling reactions: Synthesis, electrochromic behaviors, and hole mobility
Resource
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,47(16),4037-4050.
Journal
Journal of Polymer Science, Part A: Polymer Chemistry
Journal Volume
47
Journal Issue
16
Pages
4037-4050
Date Issued
2009
Author(s)
Abstract
Abstract Methoxy?substituted poly(triphenylamine)s, poly?4?methoxytriphenylamine ( PMOTPA ), and poly? N,N ?bis(4?methoxyphenyl)? N ��, N ��?diphenyl? p ?phenylenediamine ( PMOPD ), were synthesized from the nickel?catalyzed Yamamoto and oxidative coupling reaction with FeCl 3 . All synthesized polymers could be well characterized by 1 H and 13 C NMR spectroscopy. These polymers possess good solubility in common organic solvent, thermal stability with relatively high glass?transition temperatures ( T g s) in the range of 152�V273 �XC, 10% weight?loss temperature in excess of 480 �XC, and char yield at 800 �XC higher than 79% under a nitrogen atmosphere. They were amorphous and showed bluish green light (430�V487 nm) fluorescence with quantum efficiency up to 45�V62% in NMP solution. The hole?transporting and electrochromic properties are examined by electrochemical and spectroelectrochemical methods. All polymers exhibited reversible oxidation redox peaks and E onset around 0.44�V0.69 V versus Ag/AgCl and electrochromic characteristics with a color change under various applied potentials. The series of PMOTPA and PMOPD also showed p?type characteristics, and the estimated hole mobility of O ? PMOTPA and Y ? PMOPD were up to 1.5 �� 10 ?4 and 5.6 �� 10 ?5 cm 2 V ?1 s ?1 , respectively. The FET results indicate that the molecular weight, annealing temperature, and polymer structure could crucially affect the charge transporting ability. This study suggests that triphenylamine?containing conjugated polymer is a multifunctional material for various optoelectronic device applications. ? 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 4037�V4050, 2009
Type
journal article