中性红电聚合的热电化学与现场光谱电化学行为

用现场紫外-可见光谱电化学以及热电化学方法研究了在不同的pH下中性红的电聚合过程．实验表明，聚合前的电引发作用是产生阳离子自由基，该阳离子自由基与中性红或另外一个阳离子自由基反应生成中性红低聚合物．中性红低聚合物能在较低的电位下氧化成相应的阳离子自由基，并进一步与中性红或另外一个阳离子自由基反应生成更大分子量的中性红聚合物．因此聚合前的电引发有利于中性红单体在较低电位区间的电聚合并获得好的聚中性红膜．

In-Situ Thermoelectrochemical and In-Situ UV-Vis Spectroscopic Study of Neutral Red Electropolymerization

Electropolymerization of neutral red was investigated by in-situ UV-Vis spectroscopy and in-situ thermoelectrochemistry at various pH. The experimental results showed that during the electro-initiation process a radical-cation was produced by means of electrooxidation at a high potential and reacted further with other radicals or neutral red monomers to form the oligomer which can be oxidated more easily to a radical-cation at a lower potential. Consequently after the electro-initiation the electropolymerization of neutral red can well be accomplished on a narrow potential range and good poly neutral red films can be obtained.