Single-crystal to single-crystal phase transitions of bis(N-phenylisonicotinamide)silver(I) nitrate reveal cooperativity properties in porous molecular materials

Two single-crystal to single-crystal phase transitions in trans-[Ag(NPI)2](NO3)·2CH3OH (1a), (NPI = N-phenylisonicotinamide) were characterized with X-ray crystallography; the first transition is reversible and arises from a desolvation transition induced by vacuum and generated 1b; the second transition was induced by heat at 140 °C and generated 1c.