Reversed crystal growth of metal organic framework MIL-68(In)

An investigation of the crystal growth of metal organic framework MIL-68(In) under solvothermal conditions revealed a non-classical reversed crystal growth mechanism via a route of nanorods – orientated aggregation into polycrystalline microrods – surface recrystallisation into a hexagonal shell – extension of recrystallisation from the surface to the core of the microrods. Terephthalic acid molecules which are adsorbed onto the surface of nanorods are believed to strengthen the inter-particle interaction, leading to an early stage aggregation of the monocrystalline nanorods.