| 초록 |
New polymers containing silole and germole have been synthesized and used to detect nitroaromatic compounds, such as picric acid, trinitrotoluene (TNT), dinitrotoluene (DNT), and nitrobenzene. Photoluminescence quenching of copolymers in toluene solutions with nitrobenzene, DNT, TNT, and picric acid were measured and a linear Stern-Volmer relationship was observed. The mechanism of quenching is attributed to electron transfer from the conduction band of copolymers to the LUMO of the analyte. The lifetimes of photoluminescence and quenching rates of individual polymers for the analytes have been measured. PTPS (polytetraphenylsilole) nanoaggregates have been synthesized and used to detected explosives. A linear Stern-Volmer relationship is obtained for each analytes. Particle size of PTPS nanoaggregates obtained from SEM were in the range of 50 ~ 200 nm. Stabilities for PTPS nanoaggregates and have been measured. The quenching efficiency of PTPS nanoaggregates for nitroaromatic compounds is better than that of PTPS polymer. |
