A two-photon fluorescent probe derived from spirobifluorene for fast sensing of hypochlorite and mercury ions

摘要

A two-photon fluorescent probe derived from spirobifluorene has been developed. The probe exhibits large two-photon cross-section value. It displayed fast response toward ClO−/ Hg2+with high sensitivity and selectivity, exhibiting fluorescence enhancement. In the case of TPA, the detection limit ofSPF-Sis 11nM for ClO−and 24nM for Hg2+, which is lower than that obtained with one-photon fluorescence. Moreover, the present probe was successfully applied to the two-photon fluorescence imaging of ClO−and Hg2+in living cells. This work indicated that the compound is an excellent fluorescence probe for the detection of Hg2+and ClO−and provides a two-photon fluorescence probe for ClO−, which is rarely reported till now.