RB-OPD

• CAT Number: I044996
• CAS Number: 1034863-51-8
• Molecular Formula: C34H36N4O2
• Molecular Weight: 532.68
• Purity: ≥95%
• Synonyms: 2-(2-aminophenyl)-3′,6′-bis(diethylamino)spiro[isoindole-3,9′-xanthene]-1-one
• IUPAC Name: 2-(2-aminophenyl)-3',6'-bis(diethylamino)spiro[isoindole-3,9'-xanthene]-1-one
• InChI: InChI=1S/C34H36N4O2/c1-5-36(6-2)23-17-19-27-31(21-23)40-32-22-24(37(7-3)8-4)18-20-28(32)34(27)26-14-10-9-13-25(26)33(39)38(34)30-16-12-11-15-29(30)35/h9-22H,5-8,35H2,1-4H3
• InChIKey: FLFCPVCPMCLBEW-UHFFFAOYSA-N
• SMILES: CCN(CC)C1=CC2=C(C=C1)C3(C4=C(O2)C=C(C=C4)N(CC)CC)C5=CC=CC=C5C(=O)N3C6=CC=CC=C6N

RB-OPD (Cat No.:I044996) is a fluorescent chemosensor complex synthesized by linking Rhodamine B to o-phenylenediamine. It is widely used in analytical and bioanalytical chemistry for the selective detection of metal ions, particularly Cu²⁺ and Fe³⁺, due to its high sensitivity and fluorescence “turn-on” response upon metal binding. The spirolactam ring structure of RB-OPD remains non-fluorescent until coordination with target ions induces ring opening and fluorescence activation. RB-OPD is valuable in environmental monitoring, cell imaging, and molecular sensing.