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首页> 外文期刊>RSC Advances >Structural effect of oxazolone derivatives on the initiating abilities of dye-borate photoredox systems in radical polymerization under visible light
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Structural effect of oxazolone derivatives on the initiating abilities of dye-borate photoredox systems in radical polymerization under visible light

机译：恶唑酮衍生物对可见光下自由基聚合中染料光毒剂系统启动能力的结构作用

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Three photoinitiating systems based on new oxazolone derivatives have been developed and their performance in initiation of radical polymerization of acrylate monomers has been tested by differential scanning calorimetry. The absorption characteristics of the oxazol-5(4 H )-ones is compatible with the emission characteristics of different light sources like diode pulse solid state lasers. Thus, the dyes were used as sensitizers which are photoreduced during a photochemical reaction in the presence of phenyltriethylborate salt. Results showed that the increase in the dimensionality of the molecule extends the range of light absorption and increases the efficiency of the photoinitiation process. The photoreduction of the oxazolone–borate complex was studied using steady-state and nanosecond laser flash photolysis. The dye singlet and triplet were found to be quenched by the electron donor via an electron transfer process. Rate constants for the quenching of the excited states were high and were found to depend on the dye structure.
机译：已经开发了基于新的恶唑酮衍生物的三种光引发系统，并通过差示扫描量热法测试了丙烯酸酯单体的激泌自由基聚合中的性能。恶唑-5（4小时） - 酮的吸收特性与不同光源的排放特性相容，如二极管脉冲固态激光器。因此，用作苯基三甲基硼酸盐存在的光化学反应期间在光化学反应中被光学感知染料。结果表明，分子的维度的增加延伸了光吸收的范围并提高了光引发过程的效率。利用稳态和纳秒激光光学光解，研究了恶唑酮 - 硼酸盐配合物的光电。发现染料态单和三态通过电子供体通过电子转移方法淬灭。用于淬火兴奋状态的速率常数高，发现取决于染料结构。

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