Fig. 2: Characterization and property of the cocrystal.

a Packing structure of the cocrystal of 4-nitrophthalonitrile and 1,3,5-trimethoxybenzene. b The UV-Vis absorption spectra of 4-nitrophthalonitrile, 1,3,5-trimethoxybenzene and their cocrystal. c DFT calculation on the HOMO and LUMO orbitals of the crystal structure. d DFT calculation on the electron-hole distribution of single complex in crystal structure. e EPR monitoring experiments of the cocrystal and solution of 4-nitrophthalonitrile and 1,3,5-trimethoxybenzene in the absence or presence of 390 nm light.