scholarly journals Modulation of circularly polarized luminescence through excited-state symmetry breaking and interbranched exciton coupling in helical push–pull organic systems

2020 ◽  
Vol 11 (2) ◽  
pp. 567-576 ◽  
Author(s):  
Kais Dhbaibi ◽  
Ludovic Favereau ◽  
Monika Srebro-Hooper ◽  
Cassandre Quinton ◽  
Nicolas Vanthuyne ◽  
...  
Keyword(s):  
Excited State ◽  
Symmetry Breaking ◽  
Luminescence Intensity ◽  
Solvent Polarity ◽  
Circularly Polarized ◽  
Polarity Effect ◽  
Exciton Coupling ◽  
Organic Systems ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

Solvent polarity effect on circularly polarized luminescence intensity was assessed in helical push–pull organic systems through excited-state symmetry breaking and interbranched exciton coupling.

Synthetic Control of the Excited-State Dynamics and Circularly Polarized Luminescence of Fluorescent “Push-Pull” Tetrathia[9]helicenes

2016 ◽  
Vol 22 (12) ◽  
pp. 4263-4273 ◽  
Author(s):  
Yuki Yamamoto ◽  
Hayato Sakai ◽  
Junpei Yuasa ◽  
Yasuyuki Araki ◽  
Takehiko Wada ◽  
...  
Keyword(s):  
Excited State ◽  
Synthetic Control ◽  
Circularly Polarized ◽  
Excited State Dynamics ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

Circularly Polarized Luminescence of Chiral Pt(pppb)Cl (pppbH=1-pyridyl-3-(4,5-pinenopyridyl)benzene) Aggregate in the Excited State

2015 ◽  
Vol 11 (2) ◽  
pp. 265-273 ◽  
Author(s):  
Saori Tanaka ◽  
Kyohei Sato ◽  
Kyoko Ichida ◽  
Taichi Abe ◽  
Taro Tsubomura ◽  
...  
Keyword(s):  
Excited State ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

Excited-state chiral discrimination observed by time-resolved circularly polarized luminescence measurements

1989 ◽  
Vol 111 (8) ◽  
pp. 3082-3083 ◽  
Author(s):  
David H. Metcalf ◽  
Seth W. Snyder ◽  
Shuguang Wu ◽  
Gary L. Hilmes ◽  
James P. Riehl ◽  
...  
Keyword(s):  
Excited State ◽  
Chiral Discrimination ◽  
Time Resolved ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

Circularly Polarized Luminescence Liquids Based on Siloxybinaphthyls: Best Binaphthyl Dihedral Angle in the Excited State

2021 ◽  
Vol 133 (18) ◽  
pp. 10056-10060
Author(s):  
Kazuto Takaishi ◽  
Tomoki Matsumoto ◽  
Miyu Kawataka ◽  
Tadashi Ema
Keyword(s):  
Excited State ◽  
Dihedral Angle ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

scholarly journals Aggregation-Induced Symmetry Breaking from Achiral Systems

2020 ◽  
Author(s):  
Haoke Zhang ◽  
Ryan Tsz Kin Kwok ◽  
Jacky W. Y. Lam ◽  
Ben Zhong Tang
Keyword(s):  
Symmetry Breaking ◽  
Chiral Molecule ◽  
Aggregate State ◽  
Interesting Phenomenon ◽  
Circularly Polarized ◽  
Water Fraction ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
The Origin Of Life ◽  
The Difference

Debates on the source of chirality have lasted for several centuries due to its significance for the exploration of the origin of life. It is still a thorny scientific problem that how the first chiral molecule is generated without any chiral factors. In this work, an interesting phenomenon, aggregation-induced symmetry breaking (AISB), is observed in achiral diphenylethylene and <i>p</i>-terphenyl derivatives. For compound (<i>E</i>)-1,2-Bis(2,4,5-trimethylphenyl)ethene (2,4,5-TMe-DPE), there is no chiroptical signal both in its solution and crystal state. However, unexpected chiroptical signals, circular dichroism (CD) and circularly polarized luminescence (CPL), are observed in their aggregate state and the emission dissymmetry factor is as high as 0.015 at 70% water fraction. Meantime, time-dependent CD and CPL effect are also investigated which suggests that AISB involves both dynamic and kinetic processes. Calculation is further carried out to prove the existence of two enantiomers in diphenylethylene and <i>p</i>-terphenyl derivatives. Finally, we propose that the symmetry breaking in aggregate state might be caused by the difference of resolution rate to two enantiomers.

scholarly journals Solvent polarity driven helicity inversion and circularly polarized luminescence in chiral aggregation induced emission fluorophores

2020 ◽  
Vol 11 (36) ◽  
pp. 9989-9993
Author(s):  
Qiang Ye ◽  
Feng Zheng ◽  
Enqi Zhang ◽  
Hari Krishna Bisoyi ◽  
Shuyuan Zheng ◽  
...  
Keyword(s):  
Solvent Polarity ◽  
Circularly Polarized ◽  
Aggregation Induced Emission ◽  
Molecular Chirality ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Left And Right

The formation of both left- and right-handed helical superstructures with circularly polarized luminescence has been achieved in a chiral tetraphenylethylene derivative just by varying the solution polarity without any change in molecular chirality.

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