Due to the regulations of multi-configuration morpholine bridges and spacers, the direct collapse of carbon cages commonly occurring in fullerenes is avoided. This makes fine structure transformation possible for the first time, including ligand configuration exchange, anisotropic shrinkage of the cage, newly constructed bonds, and even the encaged metal's movement with increasing pressure.
Besides, the charge-transfer principle has been found to be the force underlying structural transition.
These findings demonstrated that multi-configuration ligands suggest an innovative strategy for phase transition control of metallofullerenes under high pressure, thus providing deep insight, step by step, into the phase transition mechanism of these hybrid molecular systems on the molecular level.
The in-depth study of new nanomaterials places higher requirements on the rational design of materials, on controlling their properties, and on the technology used to characterize materials. This study is a successful case of the “1+1+1>3” research strategy, which combines advanced materials, theoretical analysis and synchrotron radiation technology.
This project was supported by the National Natural Science Foundation of China.
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