光素在可见光下对光雷多克斯启动性能的替代作用
Won Oh Choi1, Young Jae Jung1, Minyoung Kim1
1Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41566, South Korea.
ACS omega
|November 6, 2023
概括
光素的替代物显著影响可见光光氧催化. 电子捐赠和提取组通过影响光诱导电子转移 (PET) 速率来改变催化效率.
科学领域:
- 有机化学 有机化学
- 摄影化学的使用.
- 催化剂是一种催化剂.
背景情况:
- 光素是一种广泛使用的染料,具有作为可见光光电还原催化剂的潜力.
- 了解替代剂效应对于优化催化剂性能至关重要.
研究的目的:
- 研究光素核心上的不同替代剂如何影响其光氧催化活性.
- 在可见光催化中建立光素衍生物的结构性能关系.
主要方法:
- 六种含有不同替代剂的光素衍生物的合成和表征 (氨基,胺基,异硫酸,氨基甲基,,).
- 合成衍生物的光物理和电化学分析.
- 在有氧条件下与三甲胺 (TEOA) 进行聚乙烯基醇 (PEGDA) 二烯酸盐 (PEGDA) 和N-vinylpyrrolidone (VP) 的可见光介导光聚合的催化性能评估.
主要成果:
- 氨基和替代剂导致最低的催化性能,归因于分子内光诱导电子转移 (PET).
- 其他替代剂 (中度/弱消活剂和激活剂) 与未被替代的光素相比表现较差.
- 降低的催化活性与分子间PET (ΔG_PET) 的更负的自由能量变化相关.
结论:
- 替代剂的电子性质极大地影响光素的光氧化催化效率.
- 强大的电子推拉效应可以阻碍通过分子内PET的催化,而中度效应可以降低分子间PET速率.
- 这些发现为设计基于光素的改进可见光光电还原催化剂提供了宝贵的见解.
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