PHOSPHA-FLUORESCEIN COMPOUND OR SALT THEREOF, AND FLUORESCENT DYE USING SAME

摘要

A phospha-fluorescein compound represented by general formula (I), or a salt, hydrate or solvate of the phospha-fluorescein compound is capable of achieving a sufficient quantum yield, while having a maximum absorption wavelength and a maximum fluorescence wavelength within the range of 600-700 nm. This phospha-fluorescein compound, or a salt, hydrate or solvate thereof is also capable of sufficiently reducing HOMO. (In general formula (I), R¹ represents an optionally substituted aryl group; R² represents a hydrogen atom or an organic group; and R represents a group that is represented by general formula (II) (where, R³ represents an optionally substituted aryl group, an optionally substituted alkyl group, an optionally substituted alkenyl group or an optionally substituted alkynyl group; and R⁴ represents an optionally substituted alkyl group).)