| 초록 |
Single-molecule spectroscopy of liquid crystalline bichromophoric systems allows investigation of fundamental photophysical processes such as energy or electron transfer in much greater detail than the respective ensemble measurements. The kinds of chromophores are biphenyl and pyrene moiety respectively. In LC small molecules with two chromophores, energy hopping and transfer to the chromophore with the energetically lowest S1 state was observed. If more than one chromophore is in an excited state in one molecule, annihilation, either singlet-triplet or singlet-singlet, can occur. In the latter case, a higher singlet state is populated opening new deactivation pathways. In the presence of an electron donor, reversible electron transfer could be observed, and the effect of orientation on photophysical properties was established. |
