ABSTRACT
Organic photoreactions in the solid state are strictly controlled by the crystal structure, which in turn is the result of an interplay of a range of noncovalent, intermolecular interactions, e.g., van der Waals forces, hydrogen bonding, and donor-acceptor interactions. Thus, in principle, the solid-state photoreactivities and selectivities must be freely controllable by the high-level design of the crystal structure by exploiting these intermolecular forces. However, the balances between these forces are so subtle that one cannot predict, at present, the crystal structure from the molecular structure. In this connection, our efforts to devise various methods that can "forcibly" change chemo-, regio-, stereo-, and enantioselectivities of particular solid-state photoreactions to desired directions through "crystalline supermolecule" formation is important [1].
