N-Aminofluorescein

N-Aminofluorescein is a fluorescein hydrazide with spiro ring structure and described as a highly selective and sensitive fluorescence probe for Cu2+. It absorbs maximally around 490-495 nm and emits bright green fluorescence near 515-520 nm, with a high quantum yield. It can be used for direct detection of Cu2+ in biological systems. Spectral Data: lambdaex/em = 495/516nm. The presence of the exocyclic amino group in the structure, allows for selective chemical reactivity, making it suitable for use as a building block in the design of redox-sensitive probes, labeling reagents, and diagnostic sensors.