Electrochemical copolymerization study of o-toluidine and o-aminophenol by the simultaneous EQCM and in situ FTIR spectroelectrochemistry.
The electrochemical synthesis and characterization of a copolymer, poly(o-toluidine-co-o-aminophenol), were conducted using in situ piezoelectric FTIR spectroelectrochemistry. The monomer feed ratio strongly affects the copolymerization rate and the properties of the copolymer during the electrosynthesis in 0.5M H(2)SO(4) aqueous solution. The effects of scan rate and pH value on the electrochemical activity of the obtained copolymer were also studied. The copolymer synthesized in higher molar ratio of o-toluidine/o-aminophenol exhibited good electrical activity and stability in a broad pH range. The copolymerization mechanisms of o-toluidine and o-aminophenol were deduced. The copolymer formed through the head-to-tail coupling of the two monomers via -NH- groups was a new polymer rather than a mixture of poly(o-toluidine) and poly(o-aminophenol).
Yang
Qin
Q
Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China.
Zhang
Youyu
Y
Li
Haitao
H
Zhang
Yuqin
Y
Liu
Meiling
M
Luo
Jiao
J
Tan
Liang
L
Tang
Hao
H
Yao
Shouzhuo
S
D000627:Aminophenols / Q000737:chemistry*; D004563:Electrochemistry; D006863:Hydrogen-Ion Concentration; D011108:Polymers / Q000737:chemistry*; D011791:Quartz / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013997:Time Factors; D014052:Toluidines / Q000737:chemistry*
D000627:Aminophenols; D011108:Polymers; D014052:Toluidines; D011791:Quartz; C027667:2-aminophenol; C023622:2-toluidine