Stimuli-Responsive Circularly Polarized Organic Ultralong Room Temperature Phosphorescence.,Angewandte Chemie International Edition

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Stimuli-Responsive Circularly Polarized Organic Ultralong Room Temperature Phosphorescence.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-01-04 , DOI: 10.1002/anie.201915164
Hui Li ₁ , Huanhuan Li ₁ , Wu Wang ₁ , Ye Tao ₁ , Shuang Wang ₁ , Qingqing Yang ₁ , Yunbo Jiang ₁ , Chao Zheng ₁ , Wei Huang _{1,

2} , Runfeng Chen ₁

Affiliation

Purely organic materials showing room temperature phosphorescence (RTP) and ultralong RTP (OURTP) have recently attracted much attention. However, it is challenging to integrate circularly polarized luminescence (CPL) into RTP/OURTP. Here, we show a strategy to realize CPL-active OURTP (CP-OURTP) by binding an achiral phosphor group directly to the chiral center of an ester chain. Engineering of this flexible chiral chain enables efficient chirality transfer to carbazole aggregates, resulting in strong CP-OURTP with a lifetime of over 0.6 s and dissymmetry factor of 2.3×10-3 after the conformation regulation upon photo-activation. The realized CP-OURTP is thus stable at room temperature but can be deactivated quickly at 50 °C to CP-RTP with high CPL stability during the photo-activation/thermal-deactivation cycles. Based on this extraordinary photo/thermal-responsive and highly reversible CP-OURTP/RTP, a CPL-featured lifetime-encrypted combinational logic device has been successfully established.

中文翻译：

刺激响应的圆偏振有机超长室温磷光。

具有室温磷光（RTP）和超长RTP（OURTP）的纯有机材料近来备受关注。但是，将圆偏振发光（CPL）集成到RTP / OURTP中具有挑战性。在这里，我们展示了一种通过将非手性荧光基团直接与酯链的手性中心结合来实现CPL活性OURTP（CP-OURTP）的策略。通过对这种灵活的手性链进行工程设计，可以有效地将手性转移至咔唑聚集体，从而产生强CP-OURTP，其光活化构象调节后的寿命超过0.6 s，不对称系数为2.3×10-3。因此，实现的CP-OURTP在室温下稳定，但在光激活/热失活循环中，具有高CPL稳定性的CP-RTP可以在50°C时迅速失活。

更新日期：2020-01-31

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