Modulating the Ground- and Excited-State Oxidation Potentials of Diaminonaphthalene by Sequential N-Methylation
作者:Neil P. Campbell、Amethist S. Finch、Steven E. Rokita
DOI:10.1002/cphc.200900969
日期:2010.6.7
decrease in ground‐state oxidation potential for derivatives containing monomethylamino substituents. In contrast, steric effects seem to dominate the increase in the ground‐state oxidation potential of derivatives containing dimethylamino substituents since the conformational constraints created by dimethylation suppress delocalization of the nonbonding electrons. Absorption and emission properties also
合成了一系列1,5-二氨基萘衍生物,并对其进行了表征,以提供结构相似但电势变化的基态和激发态电子供体。报道了该系列的电化学和光谱性质,它们一起说明了烷基取代在芳基胺上的两个相反的结果。甲基化的诱导作用从含有单甲基氨基取代基的衍生物的基态氧化电位的降低中可以明显看出。相比之下,由于二甲基化产生的构象约束抑制了非键合电子的离域作用,因此空间效应似乎主导了含二甲基氨基取代基的衍生物基态氧化电位的增加。吸收和发射特性也响应于N-甲基化水平的提高,