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Molecular Modulation Based on the Terminal Substituent in Twistacenes for Organic Light‐Emitting Diodes
Author(s) -
Wei Changting,
Wu Jie,
Zhang Dongyu,
Su Wenming,
Xiao Jinchong,
Cui Zheng
Publication year - 2018
Publication title -
asian journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.846
H-Index - 44
eISSN - 2193-5815
pISSN - 2193-5807
DOI - 10.1002/ajoc.201700576
Subject(s) - substituent , stacking , chemistry , oled , intermolecular force , anthracene , fluorescence , electroluminescence , molecule , crystallography , photochemistry , stereochemistry , organic chemistry , layer (electronics) , optics , physics
Three novel end‐capping twistacene derivatives with phenyl (PyDP), naphthyl (PyDN), and anthryl groups (PyDA) have been designed and synthesized. Given the crystallographic analyses, the as‐prepared molecules exhibited a twisted topological structure with the torsion angles of 35.99° for PyDP and 45.85° for PyDA. In addition, there is no π‐stacking interaction in PyDP. However, PyDA displayed π‐stacking interactions between the terminal intermolecular anthracene groups. The electroluminescent performance of OLEDs shows that devices with PyDP and PyDA outperform the PyDN‐based device, which is attributable to their higher fluorescence quantum yields. The maximum EQE value for PyDP reaches 3.10 %, which illustrates that the terminal substituent can affect the performance of OLEDs to a certain extent.