Intramolecular exciton coupling modulates the convergent singlet-triplet energy gap toward NIR-emissive heavy-atom-free Oligo-BODIPY photosensitizers
Chunyan Pan, Jinsong Shao, Zhengxin Kang, Fan Lv, Xiankang Zhang, Jiangang Gao, Xinsheng Xu, Yaxiong Wei, Erhong Hao, Lijuan Jiao
Abstract
, from 0.849 to 0.154 eV) are key factors for enhancing the spin-orbit coupling mediated intersystem crossing (SOC-ISC), driven by reduced singlet state energies without significant triplet state perturbation. This work establishes intramolecular exciton coupling in conjugated BODIPY oligomers as a versatile strategy to design heavy-atom-free photosensitizers with simultaneous NIR emission and high triplet yields, unlocking potential in biomedicine, photocatalysis, and beyond.
Topics & Concepts
Intersystem crossingIntramolecular forceBODIPYChromophoreExcitonExcited statePhotochemistryChemistrySinglet fissionChemical physicsPhoton upconversionPhosphorescenceTriplet stateUltrafast laser spectroscopyBand gapDipoleQuenching (fluorescence)Coupling (piping)Conjugated systemSinglet stateMaterials scienceRational designExcitationMolecular physicsSinglet oxygenAbsorption (acoustics)Molecular engineeringStokes shiftFluorescenceOptoelectronicsLuminescence and Fluorescent MaterialsNanoplatforms for cancer theranosticsMolecular Sensors and Ion Detection