新型1，8—萘酰亚胺衍生物的合成及其分子内光致电子转移

Synthesis of Novel 1,8-Naphthalimide Derivatives and the Photo-induced Electron Transfer (PET) Process

摘要: 合成了4－哌吡嗪基－N－甲基－1，8－萘酰甲亚胺（NA1）及其衍生物。化合物NA1和4－（4－甲基－1－哌吡嗪基）－N－甲基－1，8－萘酰亚胺（NA2）分子内的脂肪胺作为电子给体，通过双碳链向萘酰亚胺进行光致电子转移，使得N－甲基－1，8－萘酰亚胺荧光团的荧光猝灭；脂肪胺质子化或季铵化后，光致电子转移过程中断、荧光恢复。这类化合物的荧光随pH值的变化而变化，表现出的荧光分子开关功能。

Abstract: Piperazinyl N methyl 1,8 naphthalimide and its derivatives were synthesized. The photo induced electron transfer (PET) occurs from the donor to the N methyl 1,8 naphthalimide fluorphore. The fluo rescence of the N methyl 1,8 naphthalimide fluorophore is quenched by the PET process. The PET process can be stopped either by the protonation or the quarterization of the amines, then the fluo rescence of the fluorophore is recovered. Compound NA1 and NA2 show intrinsically charateristic of pH sensors because that the fluorescence of compound NA1 and NA2 varies with the change of pH value.