In:
Angewandte Chemie, Wiley, Vol. 135, No. 4 ( 2023-01-23)
Abstract:
Chiral nanographenes with both high fluorescence quantum yields ( Φ F ) and large dissymmetry factors ( g lum ) are essential to the development of circularly polarized luminescence (CPL) materials. However, most studies have been focused on the improvement of g lum , whereas how to design highly emissive chiral nanographenes is still unclear. In this work, we propose a new design strategy to achieve chiral nanographenes with high Φ F by helical π‐extension of strongly luminescent chromophores while maintaining the frontier molecular orbital (FMO) distribution pattern. Chiral nanographene with perylene as the core and two dibenzo[6]helicene fragments as the wings has been synthesized, which exhibits a record high Φ F of 93 % among the reported chiral nanographenes and excellent CPL brightness ( B CPL ) of 32 M −1 cm −1 .
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.202215367
Language:
English
Publisher:
Wiley
Publication Date:
2023
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