Grace James P, Flitz Evan S, Hwang Dae Sun, Bowden Ned B
Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States.
Macromolecules. 2021 Nov 23;54(22):10405-10414. doi: 10.1021/acs.macromol.1c01548. Epub 2021 Nov 12.
Polymerizations of phenylamines with a disulfide transfer reagent to yield poly[,-(phenylamino) disulfides] () were investigated due to their unique repeat units that resulted in conjugation along the backbone that was perturbed by the aromatic rings and gave different colors for the polymers. These polymers were synthesized from 10 different anilines and sulfur monochloride in a step-growth polymerization. The polymers were characterized by nuclear magnetic resonance spectroscopy, size exclusion chromatography-multiangle light scattering, and UV-vis spectroscopy. These polymers possessed a polymeric backbone solely consisting of nitrogen and sulfur [-N(R)SS-], which was conjugated and yielded polymers of moderate molecular weight. Most notably, these polymers were an array of colors ranging from pale yellow to a deep purple depending on the substitution of the aromatic ring. The more electron-poor systems produced lighter yellow polymers, while the electron-rich systems gave orange, green, red, and even purple polymers.
研究了苯胺与二硫化物转移试剂聚合生成聚，-(苯基氨基)二硫化物 )的反应，因其独特的重复单元会导致沿主链的共轭，而这种共轭会受到芳环的干扰，从而使聚合物呈现出不同颜色。这些聚合物是通过10种不同的苯胺与一氯化硫在逐步增长聚合反应中合成的。通过核磁共振光谱、尺寸排阻色谱-多角度光散射和紫外-可见光谱对聚合物进行了表征。这些聚合物具有仅由氮和硫[-N(R)SS-]组成的聚合物主链，该主链具有共轭性，且生成中等分子量的聚合物。最值得注意的是，根据芳环的取代情况，这些聚合物呈现出从浅黄色到深紫色的一系列颜色。电子缺乏程度较高的体系生成浅黄色聚合物，而电子丰富的体系则生成橙色、绿色、红色甚至紫色聚合物。
