Interfacing High‐Energy Charge‐Transfer States to a Near‐IR Sensitizer for Efficient Electron Transfer upon Near‐IR Irradiation
作者:Dilip Pinjari、Ajyal Z. Alsaleh、Yuvraj Patil、Rajneesh Misra、Francis D'Souza
DOI:10.1002/anie.202013036
日期:2020.12.21
Push–pull systems comprising of triphenylamine–tetracyanobutadiene (TPA‐TCBD), a high‐energy charge‐transfer species, are linked to a near‐IR sensitizer, azaBODIPY, for promoting excited‐state CS. These systems revealed panchromatic absorption owing to intramolecular CT and near‐IR absorbing azaBODIPY. Using electrochemical and computational studies, energy levels were established to visualize excited
由三苯胺-四氰基丁二烯(TPA-TCBD)(一种高能电荷转移物质)组成的推挽系统与近红外敏化剂azaBODIPY相连,以促进激发态CS。这些系统由于分子内CT和近红外吸收azaBODIPY而显示出全色吸收。使用电化学和计算研究,建立能级以可视化激发态事件。进行Fs‐TA研究以监测兴奋态CT事件。通过目标分析,确定了溶剂极性,连接的CT实体数和激发波长依赖性对控制CS状态寿命的影响。3中的两个TPA-TCBD实体之间的电子交换似乎可以延长CS状态的寿命。我们已经成功演示了在高能CT和低能近红外激发方面的高效CS,这表明这些推挽系统对于在宽光学窗口中运行的光电应用非常重要。