Effect of halogen bonding on supramolecular assembly and photophysical properties of diaryl oxalates

Flexible organic crystals. Understanding the tractable co-existence of elastic and plastic bending

“…The oxalate functionality remains planar, though it is near orthogonal to the coplanar aromatic rings. 39 The coplanar aromatic rings are optimal for forming π⋯π interactions. Thus with weaker interactions in the interlayer region, the system develops enough anisotropy to alter the subtle balance between elasticity and plasticity.…”