合成了一种新型的萘二甲酰亚胺修饰的聚乙烯亚胺(PEI)纳米颗粒(称为NPEI-NPs),并将其用作荧光探针,用于快速,选择性和灵敏的痕量DNA荧光检测。合成过程涉及用4-丁基氨基-N-羧甲基-1,8-萘二甲酰亚胺(BACMN)对PEI进行共价修饰,从而获得两亲性聚合物。然后将两亲性聚合物在水中自组装,得到NPEI-NP。NPEI-NPs溶于水,并在545 nm发射荧光,并在460 nm激发。NPEI-NPs与DNA相互作用产生的荧光光谱表明,NPEI-NPs的荧光随着DNA的存在而增加。因此,开发了一种荧光增强方法来测定痕量鱼的精子DNA(fsDNA)和小牛胸腺DNA(ctDNA)。在最佳条件下 在fsDNA浓度范围为0.05-2.8μg/ mL和ctDNA浓度范围为0.08-3.0μg/ mL时,校准曲线呈线性关系。fsDNA和ctDNA的检出限分别为1.6 ng / mL和2.0 ng
The synthesis and fluorescence of novel
N
‐substituted‐1,8‐naphthylimides
摘要:
Abstractmagnified imageThe synthesis and characterisation of a series of novel 4‐acylamino and 4‐alkylamino‐N‐1,8‐naphthalimides is described. The UV‐visible absorption and emission properties of the compounds are reported. Significant solvent effects are noted for 4‐n‐butyl‐9‐n‐butyl‐1,8‐naphthylimide. The incorporation of acetyl and chloroacetyl groups into the 4‐substituent markedly increases the fluorescence quantum yield compared with 4‐alkylamino substituemnts.