Thermally activated delayed fluorescence with circularly polarized luminescence characteristics

2015 ◽  
Vol 51 (68) ◽  
pp. 13268-13271 ◽  
Author(s):  
Takuro Imagawa ◽  
Shuzo Hirata ◽  
Kenro Totani ◽  
Toshiyuki Watanabe ◽  
Martin Vacha
Keyword(s):  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Circularly Polarized ◽  
Metal Free ◽  
Thermally Activated ◽  
Sign Inversion ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Large Conformational Change ◽  
Luminescence Characteristics

A metal-free aromatic compound exhibiting thermally activated delayed fluorescence as well as circularly polarized luminescence (CPL) with dissymmetry factors of 10−3 is reported. This compound shows a sign inversion between its circular dichroism signal and CPL, which is caused by a large conformational change upon photoexcitation.

Theoretical study on the light-emitting mechanism of circularly polarized luminescence molecules with both thermally activated delayed fluorescence and aggregation-induced emission

2019 ◽  
Vol 21 (14) ◽  
pp. 7288-7297 ◽  
Author(s):  
Xiu Yin ◽  
Jian-Zhong Fan ◽  
Jie Liu ◽  
Lei Cai ◽  
Hao Sun ◽  
...  
Keyword(s):  
Theoretical Study ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Circularly Polarized ◽  
Aggregation Induced Emission ◽  
Thermally Activated ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

The light-emitting mechanism of circularly polarized luminescence molecules with both TADF and AIE.

scholarly journals Controlling the Thermally Activated Delayed Fluorescence of Axially Chiral Organic Emitters and Their Racemate for Information Encryption

2021 ◽  
Author(s):  
Bingjia Xu ◽  
Zicun Song ◽  
Minmin Zhang ◽  
Qingqing Zhang ◽  
Long Jiang ◽  
...  
Keyword(s):  
Delayed Fluorescence ◽  
One Pot ◽  
Thermally Activated Delayed Fluorescence ◽  
Circularly Polarized ◽  
Thermally Activated ◽  
Axially Chiral ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

A pair of axially chiral organic enantiomers were facilely prepared through a one-pot sequential synthesis. They exhibit circularly polarized luminescence activities and have thermally activated delayed fluorescence (TADF) and aggregation-induced...

scholarly journals Turn on of sky-blue thermally activated delayed fluorescence and circularly polarized luminescence (CPL) via increased torsion by a bulky carbazolophane donor

2019 ◽  
Vol 10 (27) ◽  
pp. 6689-6696 ◽  
Author(s):  
Nidhi Sharma ◽  
Eduard Spuling ◽  
Cornelia M. Mattern ◽  
Wenbo Li ◽  
Olaf Fuhr ◽  
...  
Keyword(s):  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Circularly Polarized ◽  
Thermally Activated ◽  
Turn On ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

The carbazolophane (Czp) donor unit is introduced to the design pool of donors in TADF emitters.

scholarly journals Axial and helical thermally activated delayed fluorescence bicarbazole emitters: Opposite modulation of circularly polarized luminescence through intramolecular charge-transfer dynamics

2021 ◽  
Author(s):  
Patthira Sumsalee ◽  
Laura Abella ◽  
Thierry Roisnel ◽  
Sabrina Lebrequier ◽  
Gregory Pieters ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Circularly Polarized ◽  
Thermally Activated ◽  
High Interest ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Charge Transfer Dynamics

The rationalization of the molecular parameters that influences the intensity and sign of circularly polarized luminescence (CPL) for chiral emitters is a challenging task and remains of high interest for...

scholarly journals Ultrastable atomically precise chiral silver clusters with more than 95% quantum efficiency

2020 ◽  
Vol 6 (6) ◽  
pp. eaay0107 ◽  
Author(s):  
Zhen Han ◽  
Xi-Yan Dong ◽  
Peng Luo ◽  
Si Li ◽  
Zhao-Yang Wang ◽  
...  
Keyword(s):  
Structural Integrity ◽  
Silver Cluster ◽  
Delayed Fluorescence ◽  
Silver Clusters ◽  
Ambient Conditions ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
One Step

Monolayer-protected atomically precise silver clusters display low photoluminescence (PL) quantum yield (QY) and susceptibility under ambient conditions, and their chiroptical activities also remain underdeveloped. Here, we report enantiomers of an octahedral Ag6 cluster prepared via one-step synthesis using designed chiral ligands at ambient temperature. These clusters exhibit a highest PLQY (300 K) >95.0% and retain their structural integrity and emission up to 150°C in air. Atomically precise structural determination combined with photophysical and computational analysis revealed that thermally activated delayed fluorescence, observed in silver cluster systems, is responsible for the high PLQY, which combines chirality in excited states to generate strong circularly polarized luminescence. These unprecedented findings open up horizons of investigation of monolayer-protected silver clusters for future luminescence applications.

Sign inversion of circularly polarized luminescence by geometry manipulation of four naphthalene units introduced into a tartaric acid scaffold

2014 ◽  
Vol 50 (85) ◽  
pp. 12836-12839 ◽  
Author(s):  
Tomoyuki Amako ◽  
Kazuki Nakabayashi ◽  
Tadashi Mori ◽  
Yoshihisa Inoue ◽  
Michiya Fujiki ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Tartaric Acid ◽  
Circularly Polarized ◽  
Sign Inversion ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Circular Dichroïsm

Tethering four 1- vs. 2-naphthyls to the same chiral scaffold derived from tartaric acid led to oppositely signed circularly polarized luminescence and circular dichroism.

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