申请人:Nagano Tetsuo
公开号:US20080249321A1
公开(公告)日:2008-10-09
A fluorescent probe which is represented by the following formula (wherein R
1
and R
2
represent hydrogen atom, or a substituent for trapping proton, a metal ion, or an active oxygen species; R
3
represents a monovalent substituent other than hydrogen atom, carboxy group, or sulfo group; R
4
and R
5
represent hydrogen atom, a halogen atom, or an alkyl group; R
6
to R
9
represent an alkyl group; R
10
and R
11
represent hydrogen atom, a halogen atom, or an alkyl group; M
−
represents a counter ion; and the combination of R
1
, R
2
, and R
3
(1) imparts a substantially high electron density to the benzene ring to which they bond so that the compound can be substantially non-fluorescent before trapping proton, a metal ion, or an active oxygen species, and (2) substantially reduces electron density of the benzene ring to which they bond so that the compound after trapping proton, a metal ion, or an active oxygen species can be highly fluorescent after the trapping.