Generating circularly polarized luminescence from clusterization‐triggered emission using solid phase molecular self-assembly

Peilong Liao, Shihao Zang, Tongyue Wu, Hongjun Jin, Wenkai Wang, Jianbin Huang, Ben Zhong Tang () and Yun Yan ()
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Peilong Liao: Peking University
Shihao Zang: Peking University
Tongyue Wu: Peking University
Hongjun Jin: Peking University
Wenkai Wang: Peking University
Jianbin Huang: Peking University
Ben Zhong Tang: The Chinese University of Hong Kong
Yun Yan: Peking University

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract Purely-organic clusterization‐triggered emission (CTE) has displayed promising abilities in bioimaging, chemical sensing, and multicolor luminescence. However, it remains absent in the field of circularly polarized luminescence (CPL) due to the difficulties in well-aligning the nonconventional luminogens. We report a case of CPL generated with CTE using the solid phase molecular self-assembly (SPMSA) of poly-L-lysine (PLL) and oleate ion (OL), that is, the macroscopic CPL supramolecular film self-assembled by the electrostatic complex of PLL/OL under mechanical pressure. Well-defined interface charge distribution, given by lamellar mesophases of OL ions, forces the PLL chains to fold regularly as a requirement of optimal electrostatic interactions. Further facilitated by hydrogen bonding, the through-space conjugation (TSC) of orderly aligned electron-rich O and N atoms leads to CTE-based CPL, which is capable of transferring energy to an acceptor via a Förster resonance energy transfer (FRET) process, making it possible to develop environmentally friendly and economic CPL from sustainable and renewable materials.

Date: 2021
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DOI: 10.1038/s41467-021-25789-9

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