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Ion-Pair Complexes of Pyrylium and Tetraarylborate as New Host–Guest Dyes: Photoinduced Electron Transfer Promoting Radical Polymerization
The Journal of Physical Chemistry A ( IF 2.7 ) Pub Date : 2019-08-06 00:00:00 , DOI: 10.1021/acs.jpca.9b03581
Willy G. Santos 1, 2 , Darya S. Budkina 3 , Silvia H. Santagneli 1 , Alexander N. Tarnovsky 3 , Julio Zukerman-Schpector 2 , Sidney J. L. Ribeiro 1
Affiliation  

Ultrafast transient absorption spectroscopy, NOESY-NMR, and EPR spectroscopy shed light on how π–π stacking interactions combined with electrostatic interactions can be used to form stable ion-pair complexes between pyrylium and tetraarylborate ions in which the interaction of the π-delocalized clouds promotes the observation of new radiative processes and also electron transfer processes excitation using visible light. The results exhibit a striking combination of properties, chemical stability and photophysical and photochemical events, that make these ion-pair complexes as a step toward the realization of chromophore/luminescent materials and also their use as a new monophotoinitiator system in radical polymerization reactions.

中文翻译:

y和四芳基硼酸盐的离子对络合物作为新型宿主染料:光诱导电子转移促进自由基聚合

超快速瞬态吸收光谱,NOESY-NMR和EPR光谱揭示了π-π堆积相互作用与静电相互作用的结合如何可用于在吡啶鎓和四芳基硼酸根离子之间形成稳定的离子对络合物,其中π离域云的相互作用促进观察新的辐射过程以及使用可见光激发电子转移过程。结果显示出性能,化学稳定性以及光物理和光化学事件的惊人结合,​​这些离子对络合物成为实现生色团/发光材料的一步,也将它们用作自由基聚合反应中的新型单光引发剂体系。
更新日期:2019-08-06
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