Synthesis and spectroscopic properties of 4-amino-1,8-naphthalimide derivatives involving the carboxylic group: a new molecular probe for ZnO nanoparticles with unusual fluorescence features
作者:Laura Bekere、David Gachet、Vladimir Lokshin、Wladimir Marine、Vladimir Khodorkovsky
DOI:10.3762/bjoc.9.147
日期:——
Of a series of 4-substituted 1,8-naphthalimides, fluorescent 4-(6-piperidinyl-1,3-dioxo-1H-benzo[de]isoquinolin-2(3H)-yl)benzoic acid (4) was found to be a sensitive molecular probe for ZnO nanoparticles. We investigated in detail one- and two-photon absorption properties of this fluorophore. In nonpolar solvents, the acid 4 absorbs at about 400 nm and fluoresces at 500 nm with a fluorescence lifetime
在一系列 4-取代 1,8-萘二甲酰亚胺中,发现荧光 4-(6-piperidinyl-1,3-dioxo-1H-benzo[de]isoquinolin-2(3H)-yl)benzoic acid (4)是 ZnO 纳米粒子的灵敏分子探针。我们详细研究了这种荧光团的单光子和双光子吸收特性。在非极性溶剂中,酸 4 在约 400 nm 处吸收并在 500 nm 处发出荧光,荧光寿命约为 7 ns,类似于酯 6 和此类其他衍生物的典型寿命。虽然这种酸的阴离子形式不发荧光,但 4 在极性溶剂(如乙醇和乙腈)中的部分电离不仅伴随着预期的荧光量子产率下降,而且会引起吸收和吸收的红移。荧光和双荧光,寿命为 0.2-0。3 ns 和 6 ns 归因于阴离子复合物的形成。与 ZnO 表面的相互作用导致荧光图案的进一步显着变化。