Fig. 1: Basic properties of three cocrystals.
From: Design of organic crystals with lone pairs to study spin resonance and spin-lattice interactions

HRTEM image and illustration of the distance between the donors and acceptors inside the crystals of Phe-TCNB (a) Phe(N)-TCNB (b), and Phe(2 N)-TCNB (c), where the red dashed lines depict the perpendicular distance from the center of the acceptor molecule to the plane of the donor and the numbers specify the length of the red dashed line. d Normalized ESR spectra of three crystals at 300 K under light illumination. e M-PL of three crystals at 300 K.