| 초록 |
In intermolecular systems, the fluorescent quenching can be explained by many principles and theories such as collisional quenching, dynamic quenching, static quenching, energy transfer, etc. However, some mechanisms of fluorescent quenching are still unrevealed in intramolecular systems. Here, we synthesized and analyzed the diketopyrrolopyrrole dyes having triphenylamine moieties with/without methoxy group, which induces the unrevealed fluorescent quenching. We assumed that photoinduced electron transfer(PET) in intramolecular systems was mainly related to the fluorescent quenching. To prove the assumption, ultrafast femto-second transient absorption spectroscopy(fsTA) and time-corelated single photon counting(TCSPC) were exploited to conduct time-resolved spectroscopies to prove the PET process in intramolecu-lar system. |
