9,10-Anthracenediyl-bis(methylene)dimalonic Acid

9,10-Anthracenediyl-bis(methylene)dimalonic Acid (CAS No.: 307554-62-7) is a water-soluble anthracene-derived fluorescent probe widely employed as a biochemical indicator for the detection and quantification of singlet oxygen generation in biological and photochemical systems. Functionally classified as a reactive oxygen species sensor, this compound undergoes selective photooxidation by singlet oxygen to form a corresponding endoperoxide, resulting in a measurable decrease in its characteristic absorbance and fluorescence signals, typically monitored spectrophotometrically around 400 nm with excitation and emission maxima near 380 nm and 407 nm, respectively. This property enables its use as a sensitive reporter of oxidative stress and photodynamic activity, particularly in studies investigating the efficacy and mechanism of photosensitizers in cancer research, including melanoma models and nanoparticle-based delivery systems. Although it does not directly target specific proteins or signaling pathways, its utility lies in probing oxidative processes associated with pathways such as mitochondrial dysfunction, apoptosis, and redox signaling cascades. In vitro applications commonly involve its incorporation into cell-free systems or cultured cells to assess singlet oxygen production under controlled irradiation conditions, with working concentrations typically adjusted within the low micromolar range depending on assay design. In drug discovery and biomedical research, it serves as a valuable tool for screening and characterizing compounds that modulate reactive oxygen species generation, as well as for evaluating photodynamic therapy strategies in both cellular and preclinical experimental settings.