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本工作合成了一组带不同取代基的氧鎓盐化合物,并对它们的荧光寿命、荧光量子产率以及用丁基乙烯基醚(BVE)进行猝灭的荧光猝灭常数进行了测定,发现带拉电子基的氧鎓盐化合物和BVE间存在着较强的相互作用,相反,推电子基的引入则减弱了这种影响,表明反应具有电子转移性质.由于在BVE的聚合过程中,被猝灭的氧鎓盐荧光会因BVE聚合、双键减少而使氧鎓盐荧光逐步恢复.因此利用这一现象作为荧光探针,考察了氧鎓盐光引发BVE的阳离子聚合过程.文中还对氧鎓盐光引发BVE聚合的机理进行了初步讨论.
In this work, a series of oxonium salt compounds with different substituents were synthesized and their fluorescence lifetime, fluorescence quantum yield and fluorescence quenching constants quenched with butyl vinyl ether (BVE) were measured and found that On the contrary, the introduction of electron-donating group weakened this effect, indicating that the reaction has the electron-transfer properties.Because of the polymerization of BVE was The quenching of the onium salt fluorescence will be due to the BVE polymerization, double bond reduction and the oxonium salt fluorescence gradually restored.Therefore, the use of this phenomenon as a fluorescent probe, investigated the oxonium salt photoinitiator BVE cationic polymerization process. The mechanism of photoinitiated BVE polymerization by oxonium salts was discussed.