Issue 3, 2020

Helicene-derived aggregation-induced emission conjugates with highly tunable circularly polarized luminescence

Abstract

Chiral organic molecules play an important role in generating circularly polarized luminescence (CPL) with high quantum yield and tunable colours. However, their CPL performance is virtually limited by the small dissymmetric factor |glum| value and the aggregation-caused quenching issue in the solid state. Here, we report a series of luminescent molecules with tailored marriage of helicenes and aggregation-induced emission (AIE) luminophores. The resulting adducts are highly fluorescent in the aggregated state with colour varying from blue to green and quantum yield up to 37.0%, depending on the linkage position, conjugation and length. The efficient association of the helical conjugated skeleton of helicene and the AIE moiety also enables a relatively high |glum| value ranging from 0.001 to 0.011. Notably the |glum| value could be further enhanced to ca. 0.015 by the substitution of two AIE luminophores onto a single helicene. This work provides a practical synthetic strategy for advanced molecular CPL materials, and would also favour the fabrication of high-performance circularly polarized organic light-emitting devices.

Graphical abstract: Helicene-derived aggregation-induced emission conjugates with highly tunable circularly polarized luminescence

Supplementary files

Article information

Article type
Research Article
Submitted
23 Okt 2019
Accepted
20 Nov 2019
First published
21 Nov 2019

Mater. Chem. Front., 2020,4, 837-844

Helicene-derived aggregation-induced emission conjugates with highly tunable circularly polarized luminescence

C. Shen, F. Gan, G. Zhang, Y. Ding, J. Wang, R. Wang, J. Crassous and H. Qiu, Mater. Chem. Front., 2020, 4, 837 DOI: 10.1039/C9QM00652D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements