Details

Autor(en) / Beteiligte

• Li, Hui
• Li, Huanhuan
• Wang, Wu
• Tao, Ye
• Wang, Shuang
• Yang, Qingqing
• Jiang, Yunbo
• Zheng, Chao
• Huang, Wei
• Chen, Runfeng

Titel

Stimuli‐Responsive Circularly Polarized Organic Ultralong Room Temperature Phosphorescence

Ist Teil von

• Angewandte Chemie International Edition, 2020-03, Vol.59 (12), p.4756-4762

Auflage

International ed. in English

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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. Circularly polarized organic ultralong room temperature phosphorescence (CP‐OURTP) of small molecules is realized by direct bonding of achiral carbazole to a chiral ester chain for efficient chirality transfer and molecular packing arrangement upon photo‐activation. The photo‐activated CP‐OURTP can be facilely deactivated by thermal treatment for stimuli‐responsive reversible CP‐OURTP with high photo/thermal stabilities.