N-Heteroaryl-1,8-naphthalimide fluorescent sensor for water: Molecular design, synthesis and properties
作者:Zhiwei Li、Qiwu Yang、Ruixiang Chang、Guochun Ma、Mingxi Chen、Wenqin Zhang
DOI:10.1016/j.dyepig.2010.07.009
日期:2011.3
moment on excitation which results in the fluorescence quantum yield dramatically falling as the solvent polarity increases. A typical compound 4-(1-piperidyl)-N-(2-pyrimidinyl)-1,8-naphthalimide was chosen to determine the water content in six common solvents (p-dioxane, tetrahydrofuran, acetone, dimethylformamide, acetonitrile and methanol). Fluorescence intensity changes as a function of water content
制备了一系列对溶剂极性敏感的N-杂芳基-1,8-萘二甲酰亚胺。经验和量子计算表明,杂芳基的吸电子作用增加了激发时偶极矩的变化,导致荧光量子产率随着溶剂极性的增加而急剧下降。选择典型的化合物4-(1-哌啶基)-N-(2-嘧啶基)-1,8-萘二甲酰亚胺测定六种常见溶剂中的水含量(p-二恶烷,四氢呋喃,丙酮,二甲基甲酰胺,乙腈和甲醇)。荧光强度随水含量的变化在很宽的范围内与改进的Stern-Volmer方程密切相关,丙酮和四氢呋喃的检出限分别为0.016%和0.020%。