Triple exciplex formed between polyacenaphthalene and terephthalic dimethylester （TDE） has been studied by means of the steady-state and time-resolved fluorescence spectra. The theoretical model of the triple excipl...Triple exciplex formed between polyacenaphthalene and terephthalic dimethylester （TDE） has been studied by means of the steady-state and time-resolved fluorescence spectra. The theoretical model of the triple exciplex formation for a flexible polymer chain in a dilute solution has been proposed. The fluorescence decays of the monomer, the exciplex and the triple exciplex obey a double exponential rule in the pbotophysical processes of the triple exciplex formation. The association rate constant of the exciplex formation is k<sub>3</sub>=6.0×10<sup>9</sup>s<sup>-1</sup>（mol/L）<sup>-1</sup>; the association rate constant of the triple exciplex formation is k<sub>6</sub>=5.2×10<sup>7</sup>s<sup>-1</sup>. A mechanism for the triple exciplex formation from the exciplex to the triple exciplex has been proved through the noncrystal films corresponding to the same concentrations of the solution systems and the fluorescence lifetimes of the intramolecular excimer.展开更多
An intramolecular excimer of poly（2- vinyl） naphthalene was formed by non-adjacentchromophores interaction, then a triple exciplex was formed by interaction with the acceptormolecule further in dilute solution. The ...An intramolecular excimer of poly（2- vinyl） naphthalene was formed by non-adjacentchromophores interaction, then a triple exciplex was formed by interaction with the acceptormolecule further in dilute solution. The lifetime of the intramolecular excimer of poly（2-vinyl） naphthalene, τ<sub>2</sub> = 18.83 ns and the rate constant for the triple exciplex formation,k<sub>7</sub> = 4. 18× 10<sup>9</sup> （mol/L）<sup>-1</sup>s<sup>-1</sup>, under diffusion-control were measured. An excimer or anexciplex could be an intermediate of the triple exciplex formation. A theoretical model ofthe triple exciplex formation is proposed.展开更多
Since 1982 our investigations on the applications of laser and spectroscopy technique to geochemical exploration of petroleum (GEP) have shown that the spectral analysis method can be effectively applied to detect oil...Since 1982 our investigations on the applications of laser and spectroscopy technique to geochemical exploration of petroleum (GEP) have shown that the spectral analysis method can be effectively applied to detect oil and natural gas, and along with that many spectral analysis methods have been established. Based on this, we have developed a spectral analysis system to polularize the methods’ application in GEP.展开更多
基金Project supported by the National Natural Science Foundation of China.
文摘Triple exciplex formed between polyacenaphthalene and terephthalic dimethylester （TDE） has been studied by means of the steady-state and time-resolved fluorescence spectra. The theoretical model of the triple exciplex formation for a flexible polymer chain in a dilute solution has been proposed. The fluorescence decays of the monomer, the exciplex and the triple exciplex obey a double exponential rule in the pbotophysical processes of the triple exciplex formation. The association rate constant of the exciplex formation is k<sub>3</sub>=6.0×10<sup>9</sup>s<sup>-1</sup>（mol/L）<sup>-1</sup>; the association rate constant of the triple exciplex formation is k<sub>6</sub>=5.2×10<sup>7</sup>s<sup>-1</sup>. A mechanism for the triple exciplex formation from the exciplex to the triple exciplex has been proved through the noncrystal films corresponding to the same concentrations of the solution systems and the fluorescence lifetimes of the intramolecular excimer.
文摘An intramolecular excimer of poly（2- vinyl） naphthalene was formed by non-adjacentchromophores interaction, then a triple exciplex was formed by interaction with the acceptormolecule further in dilute solution. The lifetime of the intramolecular excimer of poly（2-vinyl） naphthalene, τ<sub>2</sub> = 18.83 ns and the rate constant for the triple exciplex formation,k<sub>7</sub> = 4. 18× 10<sup>9</sup> （mol/L）<sup>-1</sup>s<sup>-1</sup>, under diffusion-control were measured. An excimer or anexciplex could be an intermediate of the triple exciplex formation. A theoretical model ofthe triple exciplex formation is proposed.
文摘Since 1982 our investigations on the applications of laser and spectroscopy technique to geochemical exploration of petroleum (GEP) have shown that the spectral analysis method can be effectively applied to detect oil and natural gas, and along with that many spectral analysis methods have been established. Based on this, we have developed a spectral analysis system to polularize the methods’ application in GEP.
