Achieving Enhanced Thermally Activated Delayed Fluorescence Rates and Shortened Exciton Lifetimes by Constructing Intramolecular Hydrogen Bonding Channels

2019 ◽  
Vol 11 (49) ◽  
pp. 45999-46007 ◽  
Author(s):  
Liangying Wang ◽  
Xinyi Cai ◽  
BinBin Li ◽  
Mengke Li ◽  
Zhiheng Wang ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Intramolecular Hydrogen Bonding ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Intramolecular Hydrogen

Effects of intramolecular hydrogen bonding on the conformation and luminescence properties of dibenzoylpyridine-based thermally activated delayed fluorescence materials

2019 ◽  
Vol 7 (42) ◽  
pp. 13104-13110 ◽  
Author(s):  
Jayabalan Pandidurai ◽  
Jayachandran Jayakumar ◽  
Natarajan Senthilkumar ◽  
Chien-Hong Cheng
Keyword(s):  
Hydrogen Bonding ◽  
Crystal Structures ◽  
Linear Chain ◽  
Intramolecular Hydrogen Bonding ◽  
Delayed Fluorescence ◽  
Chain Conformation ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Intramolecular Hydrogen ◽  
First Time

The crystal structures show a U shape for 26DAcBPy and 26DPXZBPy and a linear chain conformation for 25DAcBPy; for the first time, we reveal that the conformations are the result of intramolecular hydrogen bonding of these molecules.

Benzothienopyrimidine as a co-planar type rigid acceptor for high external quantum efficiency in thermally activated delayed fluorescence emitters

2019 ◽  
Vol 7 (25) ◽  
pp. 7643-7653 ◽  
Author(s):  
Chan Seok Oh ◽  
Ha Lim Lee ◽  
Wan Pyo Hong ◽  
Jun Yeob Lee
Keyword(s):  
Hydrogen Bonding ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
High Efficiency ◽  
Delayed Fluorescence ◽  
Planar Structure ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated

Thermally activated delayed fluorescence (TADF) emitters based on a new benzothienopyrimidine acceptor, which is rigid and can form a co-planar structure via hydrogen bonding, were developed as high-efficiency TADF emitters.

Mechanochromic luminescent materials of bimetallic Cu(i) complexes showing thermally activated delayed fluorescence

2020 ◽  
Vol 8 (45) ◽  
pp. 16160-16167
Author(s):  
Xing-Wei Chen ◽  
Li-Hua He ◽  
Peng Ju ◽  
Jing-Lin Chen ◽  
Sui-Jun Liu ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Delayed Fluorescence ◽  
Luminescent Materials ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Luminescence Color

Reversible mechanochromism is related to the breaking and restoring of hydrogen-bonding and luminescence color is tunable via the substituent.

scholarly journals Molecular Configuration Fixation with C–H···F Hydrogen Bonding for Thermally Activated Delayed Fluorescence Acceleration

Chem ◽  
2020 ◽  
Vol 6 (8) ◽  
pp. 1998-2008 ◽  
Author(s):  
Wenbo Yuan ◽  
Hannan Yang ◽  
Chunbo Duan ◽  
Xudong Cao ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Delayed Fluorescence ◽  
Molecular Configuration ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated

Theoretical study of intramolecular hydrogen bonding and molecular geometry of 2-trifluoromethylphenol

10.1002/jcc.2 ◽  
1996 ◽  
Vol 17 (16) ◽  
pp. 1804-1819 ◽  
Author(s):  
Attila Kov�cs ◽  
Istv�n Kolossv�ry ◽  
G�bor I. Csonka ◽  
Istv�n Hargittai
Keyword(s):  
Hydrogen Bonding ◽  
Theoretical Study ◽  
Molecular Geometry ◽  
Intramolecular Hydrogen Bonding ◽  
Intramolecular Hydrogen

Solvent Dependence of Structural Dynamics and Spin-flip Processes in 3,4,5-tri(9H-carbazole-9-yl)benzonitrile (ortho-3CzBN)

2020 ◽  
Author(s):  
Masaki Saigo ◽  
Kiyoshi Miyata ◽  
Hajime Nakanotani ◽  
Chihaya Adachi ◽  
Ken Onda
Keyword(s):  
Dft Calculations ◽  
Excited States ◽  
Structural Changes ◽  
Photophysical Properties ◽  
Delayed Fluorescence ◽  
Time Resolved ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Solvent Dependence ◽  
Acetonitrile Solutions

We have investigated the solvent-dependence of structural changes along with intersystem crossing of a thermally activated delayed fluorescence (TADF) molecule, 3,4,5-tri(9H-carbazole-9-yl)benzonitrile (o-3CzBN), in toluene, tetrahydrofuran, and acetonitrile solutions using time-resolved infrared (TR-IR) spectroscopy and DFT calculations. We found that the geometries of the S1 and T1 states are very similar in all solvents though the photophysical properties mostly depend on the solvent. In addition, the time-dependent DFT calculations based on these geometries suggested that the thermally activated delayed fluorescence process of o-3CzBN is governed more by the higher-lying excited states than by the structural changes in the excited states.<br>

Intramolecular Hydrogen Bonding Facilitates Electrocatalytic Reduction of Nitrite in Aqueous Solutions

2019 ◽  
Vol 58 (14) ◽  
pp. 9443-9451 ◽  
Author(s):  
Song Xu ◽  
Hyuk-Yong Kwon ◽  
Daniel C. Ashley ◽  
Chun-Hsing Chen ◽  
Elena Jakubikova ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Aqueous Solutions ◽  
Intramolecular Hydrogen Bonding ◽  
Electrocatalytic Reduction ◽  
Intramolecular Hydrogen
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