Study of dynamics of anisotropic vibrational energy migration in dendrimer macromolecule by using a classical oscillator model

摘要: Dendrimers are nanometer size macromolecules with a regular tree-like array of branch units. For these macromolecules, it has been confirmed by various experiments that the phonon energy which is supplied infrared light irradiation at periphery molecules migrates to core efficiently. In order clarify such an anisotropic migration phonons in dendrimer, we investigate dynamical natures this molecule using classical oscillator model approximates complicated vibrations dendrimer as simple oscillators. We calculate time developments photoexcited solving Newton equation for model. From our calculated results, clarified tendency migrate efficiently from outside through anharmonic between composition units and its trapped inner region long time. conclude characteristic structure wherein crowd toward inside, plays essential role phonons.