OBO-Fused Benzo[fg]tetracene as Acceptor With Potential for Thermally Activated Delayed Fluorescence Emitters

Frontiers in Chemistry
Zhen ZhangStefan Bräse

Abstract

Six luminophores bearing an OBO-fused benzo[fg]tetracene core as an electron acceptor were designed and synthesized. The molecular structures of three molecules (PXZ-OBO, 5PXZ-OBO, 5DMAC-OBO) were determined by single crystal X-ray diffraction studies and revealed significant torsion between the donor moieties and the OBO acceptor with dihedral angles between 75.5 and 86.2°. Photophysical studies demonstrate that blue and deep blue emission can be realized with photoluminescence maxima (λPL) ranging from 415 to 480 nm in mCP films. The emission energy is modulated by simply varying the strength of the donor heterocycle, the number of donors, and their position relative to the acceptor. Although the DMAC derivatives show negligible delayed emission because of their large singlet-triplet excited state energy difference, ΔEST, PXZ-based molecules, especially PXZ-OBO with an experimental ΔEST of 0.25 eV, demonstrate delayed emission in blend mCP films at room temperature, which suggests triplet exciton harvesting occurs in these samples, potentially by thermally activated delayed fluorescence.

References

Dec 14, 2012·Nature·Hiroki UoyamaChihaya Adachi
Apr 9, 2013·Angewandte Chemie·Jia-Sheng LuSuning Wang
Jan 20, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Sae Youn LeeChihaya Adachi
Apr 15, 2016·Journal of the American Chemical Society·Takazumi KatayamaTakuji Hatakeyama
Jun 21, 2016·Chemistry : a European Journal·Misa NumanoTakuji Hatakeyama
Jul 5, 2016·Journal of the American Chemical Society·Xiao-Ye WangKlaus Müllen
Jan 25, 2017·Chemical Society Reviews·Zhiyong YangMatthew P Aldred
Mar 4, 2017·Advanced Materials·Michael Y Wong, Eli Zysman-Colman
Apr 4, 2018·Chemical Communications : Chem Comm·T J PenfoldA P Monkman
Feb 12, 2019·Chemical Communications : Chem Comm·Kyohei Matsuo, Takuma Yasuda
Aug 28, 2020·Frontiers in Chemistry·Francesco RodellaPeter Strohriegl

❮ Previous
Next ❯

Methods Mentioned

BETA
nuclear magnetic resonance
X-ray

Software Mentioned

Gaussian

Related Concepts

Related Feeds

Adhesion Molecules in Health and Disease

Cell adhesion molecules are a subset of cell adhesion proteins located on the cell surface involved in binding with other cells or with the extracellular matrix in the process called cell adhesion. In essence, cell adhesion molecules help cells stick to each other and to their surroundings. Cell adhesion is a crucial component in maintaining tissue structure and function. Discover the latest research on adhesion molecule and their role in health and disease here.