Solvatoemissive dual fluorescence emission observed in the three positional isomers of N-(n-pyridylmethyl)-3-nitro-1,8-naphthalimide [n = 2 (1), 3 (2), 4 (3)] are described. Dual fluorescence emission in this class of compounds occurs from the excited states with extended conjugation via π-stacking interactions. The crystal structure of the compound 1 and the chloride salt of 2 were determined. The compound 1 forms dimeric assemblies through π-stacking interactions. Whereas the structure of the chloride salt of 2 is composed of dimeric assemblies of the cationic part which hold cyclic hydrated anionic assemblies through weak C-H…Cl interactions. Anionic hydrated assemblies between water and chloride ions have cyclic tetrameric structure through O-H…Cl interactions.
本文描述了在N-(n-
吡啶甲基)-
3-硝基-1,8-
萘酰亚胺[n=2(1)、3(2)、4(3)]的三种位置异构体中观察到的溶出双荧光发射。这类化合物中的双荧光发射发生在通过π-堆积相互作用扩展共轭的激发态。确定了化合物1和2的
氯化盐的晶体结构。化合物1通过π-堆积相互作用形成二聚体组装。而2的
氯化盐的结构由阳离子部分的双聚体组装组成,通过弱的C-H…Cl相互作用保持环状
水合阴离子组装。
水和
氯离子之间的阴离子
水合组装通过O-H…Cl相互作用具有环状四聚体结构。