Synthesis of a Novel Hollow Sphere Having Rigid Binaphthyl Macrocycle as Shell
A novel hollow sphere having rigid binaphthyl macrocycle as shell was prepared by means of sacrifice the silica core. The synthesis of hollow sphere from rigid colloidal silica particles occurs in three steps: a) modification of silica particles with vinyltriethoxysilane as coupling agent, b) immersion in the solution of monomer having rigid binaphthyl macrocycle and polymerization, and c) removal of silica particles. These macrocycles contained in the shell of hollow spheres belong to an important class of host-guest macrocyclic material in which the rigid backbone and C2 symmetry of the binaphthyl unit play an important role in complexing guest molecules. This will endow hollow sphere with new opportunities in molecular recognition and separation.The morphology of colloidal silica particles and hollow spheres was characterized by SEM and TEM.
Chunli BAI, Sishen XIE, Xing ZHU
N. Liu et al., "Synthesis of a Novel Hollow Sphere Having Rigid Binaphthyl Macrocycle as Shell", Solid State Phenomena, Vols. 121-123, pp. 219-222, 2007