The Study of Luminescence of Hydrogen Bond Exciplex formed by Conjugated Naphthol and Triethylamine/Formaldehyde
| Autor: | 徐美玉 |
|---|---|
| Rok vydání: | 2001 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 89 The photophysics of exciplexes and hydrogen bonding complexes has been widely studied. Nevertheless, it is not common to find examples in which the exciplex is formed by hydrogen bonding. In this thesis, we would like to investigate the photophysics of a compound that is composed of two functional groups. The compound studied is PVN, in which the naphthol and the pyridine group are connected by a CH=CH linker. Therefore, the PVN is a long conjugated system. The issues discussed include (1) the change of the excited state pKa (2) the change of the excited state dipole moment (3) the photophysics of the exciplex formed by excited PVN and triethylamine and formaldehyde. As for the pKa, we would like to know does the acidity of naphthol increase or decrease in the excited state if a conjugated system is added. Regarding the dipole moment, we wish to know whether the changes of the molecular structure enhance the excited state dipole moment. These discussions are expected to provide us valuable information and improve our knowledge in designing molecules that have better light emitting properties. The studies of the dynamics help us to understand the quenching mechanism, which in turn, increase our ability in preventing these quenching processes and in making the molecules emit light more efficiently. These studies will be very helpful in designing OLED molecular structure. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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