This is attributed to the stabilization of the excited state of intermediate of luminol by the interaction with the positively charged PEE modified layer.

• 荷正电的聚乙烯亚胺修饰分子与鲁米诺激发态3-氨基邻苯二甲酸阴离子间静电相互作用而导致的激发态稳定性增加;对鲁米诺分子的电化学发光的增强起着关键作用。