Delocalized Triplet State for Efficient Generation of Superoxide Radical

Directing photodynamic action toward the Type-I pathway requires suppressing singlet oxygen formation. A key strategy employs strongly coupled multichromophoric systems, but this is counteracted by accelerated nonradiative decay that hinders intersystem crossing (ISC). Herein, we address this issue through the rational design of asymmetric boron dipyrromethene (BODIPY) dimers. Through a combination of time-resolved spectroscopy and quantum calculations, we elucidate the structure-dependent dynam