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Amplifying Dissymmetry Factor of Upconverted Circularly Polarized Luminescence through Chirality-Induced Spin Polarization in the Photon Upconversion Process.
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2019-12-23 , DOI: 10.1021/acs.jpclett.9b03408
Tonghan Zhao 1, 2 , Jianlei Han 1 , Xujin Qin 1 , Minghao Zhou 1 , Pengfei Duan 1, 2
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2019-12-23 , DOI: 10.1021/acs.jpclett.9b03408
Tonghan Zhao 1, 2 , Jianlei Han 1 , Xujin Qin 1 , Minghao Zhou 1 , Pengfei Duan 1, 2
Affiliation
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A general phenomenon about upconverted circularly polarized luminescence (UC-CPL) based on triplet-triplet annihilation (TTA) was realized in an ambient environment by coupling three kinds of chiral acceptors with corresponding achiral sensitizers. All of the dissymmetry factors of UC-CPL exhibited significant amplification compared with the prompt CPL of the used chiral acceptors. Chirality-induced spin polarization during the TTA-UC process was in charge of the amplified dissymmetry factor of UC-CPL. Chirality-induced spin-polarized triplet excitons will suppress the TTA efficiency because the spin-polarized electrons go against the electron exchange within triplet excitons. However, the chirality-induced spin-polarized singlet excitons resulting from the TTA process can be promoted, enabling a large dissymmetry factor of UC-CPL.
中文翻译:
在光子上转换过程中通过手性诱导的自旋极化放大上转换的圆偏振发光的不对称因子。
通过将三种手性受体与相应的非手性敏化剂偶联,在环境中实现了基于三重态-三重态an灭(TTA)的上转换圆偏振光(UC-CPL)的一般现象。与使用的手性受体的即时CPL相比,UC-CPL的所有不对称因子均表现出明显的扩增。TTA-UC过程中手性诱导的自旋极化负责UC-CPL的放大不对称因子。手性诱导的自旋极化三重态激子将抑制TTA效率,因为自旋极化电子与三重态激子内的电子交换相反。但是,可以促进由TTA过程产生的手性诱导的自旋极化单重态激子,从而使UC-CPL具有较大的不对称因子。
更新日期:2019-12-23
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
在光子上转换过程中通过手性诱导的自旋极化放大上转换的圆偏振发光的不对称因子。
通过将三种手性受体与相应的非手性敏化剂偶联,在环境中实现了基于三重态-三重态an灭(TTA)的上转换圆偏振光(UC-CPL)的一般现象。与使用的手性受体的即时CPL相比,UC-CPL的所有不对称因子均表现出明显的扩增。TTA-UC过程中手性诱导的自旋极化负责UC-CPL的放大不对称因子。手性诱导的自旋极化三重态激子将抑制TTA效率,因为自旋极化电子与三重态激子内的电子交换相反。但是,可以促进由TTA过程产生的手性诱导的自旋极化单重态激子,从而使UC-CPL具有较大的不对称因子。