Fig. 3: Spin polarization improving the molecular orbital activation in ·O2– formation.

a EPR spectra of IS/MB-20 in an Ar/Air atmosphere under light irradiation. b Spin charge density of IS/MB-perfect-O2 and IS/MB-12%-O2 configuration. c The molecular orbital energy and spin electron distribution diagram for O2 and zero spin states O2. d Schematic diagram of spin electron transfer from FMOs of IS/MB to π* orbitals of O2.