Epindolidione derivative and application thereof

The invention relates to an epindolidione derivative and an application thereof. The epindolidione derivative is a compound shown in a formula I. The epindolidione derivative provided by the invention can be applied to detection of a fluorescence probe with fluorine ions and mercury ions. In the formula I, R1-R8 are respectively and independently selected from one of hydrogen, halogen, C1-C3 alkyl groups or C1-C3 alkoxy, or the combination of any two adjacent R in R1-R8 is a pentabasic or hexabasic heterocyclic radical containing nitrogen, oxygen or/and sulfur heteroatom, or the combination of any two adjacent R in R1-R8 is a carbonyl replaced pentabasic or hexabasic heterocyclic radical containing nitrogen, oxygen or/and sulfur heteroatom; and R9 and R10 are respectively and independently selected from hydrogen or C1-C12 linear chain or branched chain alkyl, at least one of R9 and R10 is C1-C12 linear chain or branched chain alkyl, and the number of the heteroatom of the heterocyclic radical is 1-3.