scholarly journals Generation of Circularly Polarized Luminescence by Symmetry Breaking

Symmetry ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 1786
Author(s):  
Yoshitane Imai
Keyword(s):  
Materials Science ◽  
Chiral Molecules ◽  
Enantiomerically Pure ◽  
Circularly Polarized ◽  
System A ◽  
Organic Luminophores ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Significant Attention ◽  
Photoexcited State

Circularly polarized luminescence (CPL) has attracted significant attention in the fields of chiral photonic science and optoelectronic materials science. In a CPL-emitting system, a chiral luminophore derived from chiral molecules is usually essential. In this review, three non-classical CPL (NC-CPL) systems that do not use enantiomerically pure molecules are reported: (i) supramolecular organic luminophores composed of achiral organic molecules that can emit CPL without the use of any chiral auxiliaries, (ii) achiral or racemic luminophores that can emit magnetic CPL (MCPL) by applying an external magnetic field of 1.6 T, and (iii) circular dichroism-silent organic luminophores that can emit CPL in the photoexcited state as a cryptochiral CPL system.

scholarly journals Synthesis of enantiomerically pure helicene like bis-oxazines from atropisomeric 7,7′-dihydroxy BINOL: preliminary measurements of the circularly polarized luminescence

2014 ◽  
Vol 55 (10) ◽  
pp. 1760-1764 ◽  
Author(s):  
M. Shyam Sundar ◽  
Harish R. Talele ◽  
Hemant M. Mande ◽  
Ashutosh V. Bedekar ◽  
Roberto C. Tovar ◽  
...  
Keyword(s):  
Enantiomerically Pure ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

Novel chiral aggregation induced emission molecules: self-assembly, circularly polarized luminescence and copper(ii) ion detection

2018 ◽  
Vol 2 (10) ◽  
pp. 1884-1892 ◽  
Author(s):  
Guangxi Huang ◽  
Rongsen Wen ◽  
Zhiming Wang ◽  
Bing Shi Li ◽  
Ben Zhong Tang
Keyword(s):  
Self Assembly ◽  
Fluorescent Chemosensor ◽  
Chiral Molecules ◽  
Ion Detection ◽  
Circularly Polarized ◽  
Aggregation Induced Emission ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

Two novel chiral molecules 1 and 2 were designed and synthesized. 1 displayed evident CPL activity, whereas 2 served as a highly selective and sensitive “turn-off” fluorescent chemosensor for Cu2+.

Functionalization of Bipyrenol: Potential Precursors for Advanced Chiral Molecules

Synthesis ◽  
2020 ◽  
Vol 52 (22) ◽  
pp. 3452-3460
Author(s):  
Ken-ichi Sugiura ◽  
Umme Aiman Liza
Keyword(s):  
Functional Group ◽  
Chiral Molecules ◽  
High Quantum Yield ◽  
Ambient Conditions ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Properties Of Materials ◽  
Chiral Materials ◽  
Widespread Interest

Considering the widespread interest in the chiroptical properties of materials, especially circularly polarized luminescence (CPL), the functionalization of bipyrenol (BPy) was carried out aiming at future advanced chiral materials (ACMs) in which BPy shows a high quantum yield and clear CPL spectra. To create ACMs using BPy units that contain nucleophilic substituents, amine and thiol were selected as the functional group and attached to BPy by means of alkyl linkages. The obtained thiol and amine derivatives are stable under ambient conditions. To demonstrate the potential of these molecules, photoinduced electron-transfer systems were synthesized.

Molecular Design to Enhance Binaphthyl-Based Chiroptics Using Organoboron Chemistry in Isomeric Chiral Scaffolds

2022 ◽  
Author(s):  
Kai Zhang ◽  
Jingyi Zhao ◽  
Niu Zhang ◽  
Jin-Fa Chen ◽  
Nan Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Universal Design ◽  
Materials Science ◽  
Molecular Design ◽  
Design Strategy ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

Access to high-performance circularly polarized luminescence is highly desired in materials science but it hitherto remains a considerable challenge. We herein present a conceptually universal design strategy to improve the...

Oligoamylose-entwined porphyrin: excited-state induced-fit for chirality induction

2016 ◽  
Vol 52 (12) ◽  
pp. 2481-2484 ◽  
Author(s):  
Mitsuhiko Morisue ◽  
Takashi Yumura ◽  
Risa Sawada ◽  
Masanobu Naito ◽  
Yasuhisa Kuroda ◽  
...  
Keyword(s):  
Excited State ◽  
Ground State ◽  
Induced Fit ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Circular Dichroïsm ◽  
Chirality Induction ◽  
Porphyrin Moiety ◽  
Photoexcited State

An oligoamylose-strapped porphyrin displayed circularly polarized luminescence (CPL) in the S1 state despite being silent in circular dichroism (CD) in the ground state, suggesting chirality induction in the photoexcited porphyrin moiety from the oligoamylose-strap in the photoexcited state.

scholarly journals Development of Circularly Polarized Luminescence (CPL) Peptides Containing Pyrenylalanines and 2-Aminoisobutyric Acid

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1550
Author(s):  
Yuki Mimura ◽  
Yuki Motomura ◽  
Mizuki Kitamatsu ◽  
Yoshitane Imai
Keyword(s):  
Near Infrared ◽  
Infrared Region ◽  
Aggregate Formation ◽  
Peptide Backbone ◽  
Circularly Polarized ◽  
Aminoisobutyric Acid ◽  
Near Ultraviolet ◽  
Organic Luminophores ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

Chiral organic and organometallic luminophores that possess circularly polarized luminescence (CPL) properties in the near-ultraviolet to near-infrared region have several useful applications. However, the CPL properties are subject to inherent factors of the compounds; to date, studies on the CPL properties influenced by amino acids and peptides are scarce. Consequently, we developed peptide-pyrene organic luminophores exhibiting various CPL properties. It is conceivable that the peptide-pyrene organic luminophores can be obtained as aggregates when dissolved in a solution. It is also possible that the formation of aggregates makes it difficult to accurately examine the CPL of the peptide in the solution. This study showed that the introduction of sterically hindered 2-aminoisobutyric acid (Aib) units into the peptide backbone inhibits aggregate formation. The resulting luminophores exhibit CPL properties owing to the presence of pyrene units. The results of this study can form a basis for the design of future materials that use peptide-pyrene organic luminophores.

scholarly journals Boosting the circularly polarized luminescence of small organic molecules via multi-dimensional morphology control

2019 ◽  
Vol 10 (28) ◽  
pp. 6821-6827 ◽  
Author(s):  
Kai Ma ◽  
Wenjie Chen ◽  
Tifeng Jiao ◽  
Xue Jin ◽  
Yutao Sang ◽  
...  
Keyword(s):  
Organic Molecules ◽  
Morphology Control ◽  
Chiral Molecules ◽  
Small Organic Molecules ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

By regulating the composition of solvents, the assembled nanostructures of chiral molecules transformed from 0D nanospheres to 3D nanoflakes, which showed significantly amplified circularly polarized luminescence.

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