| Summary: | 碩士 === 國立彰化師範大學 === 化學系 === 103 === With the application of time-correlated single photon counting system, we can know about the short excited state to the ground state process. In the measurement, we use this technique to explore the following two parts:
The first part of this article focuses on the 16-EDFONP organic light-emitting nanoparticles, which was developed by Kwang-Ming Lee professor’ research team in 2012 year. The nanoparticle has an excitation dependence, fluorescence (EDF) of optical phenomenon,. However, the EDF's photophysical mechanism did not really understand what happened cause of the phenomenon and it is not clear mechanism from EDF phenomenon. Therefore, we measure steady-state and time resolved fluorescence spectroscopy spectroscopy to investigate the real reason. in this study, In the results, the organic nanoparticles have the EDF phenomenon because there are many existence of different species.
The second part focuses on the different charge of fluorescent probe molecules (coumarin 343, Rhodamine110, coumarin 153) in different ionic (anionic, such as AOT, cations such as CTAB) and sizebof reverse micelles. Measuring the absorption , fluorescence spectrum ,and time-correlated single-photon technology systems to understand the dynamics of the excited state under different circumstances. The different charge of fluorescent probe molecules in different position of the reverse micelle may be affected by interaction between the charge and its surfactant, so we are able to control the position of the probe molecules in the reverse micelles. In this study, we will measure the fluorescence anisotropy and -hydration dynamics in the reverse micelles, and we can understand the properties of water droplets in the reverse micelles The results show that fluorescence probe in different distance between surfactant and water droplets , and there have different significant changes.
|
|---|
