Control by one drop of solvent: selective preparation of guest release/trap-triggered interconvertible molecular crystals

摘要

Interconvertible molecular crystals1(close)and1(open)composed of 4-pyridyl-1,3-indanedione dimer1were selectively obtained. Thermal removal of solvent molecules in1(open)afforded1(close). Further dipping of1(close)in a specific solvent reproduced1(open). No crystallinity loss was observed even though both processes involved a drastic change of molecular packing arrangements.