The synthesis of chiral triphenylpyrrole derivatives and their aggregation-induced emission enhancement, aggregation-induced circular dichroism and helical self-assembly

RSC Advances ◽  
2016 ◽  
Vol 6 (28) ◽  
pp. 23420-23427 ◽  
Author(s):  
Kaichang Liang ◽  
Lichao Dong ◽  
Na Jin ◽  
Didi Chen ◽  
Xiao Feng ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Self Assembly ◽  
Induced Circular Dichroism ◽  
Circularly Polarized ◽  
Aggregation Induced Emission ◽  
Self Assembling ◽  
Emission Enhancement ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Circular Dichroïsm

AIEE-active chiral triphenylpyrrole derivatives possess aggregation-induced circular dichroism and circularly polarized luminescence features with self-assembling helical nanofibers.

Aggregation-induced emission enhancement and aggregation-induced circular dichroism of chiral pentaphenylpyrrole derivatives and their helical self-assembly

2017 ◽  
Vol 41 (17) ◽  
pp. 8877-8884 ◽  
Author(s):  
Longlong Zhang ◽  
Kaichang Liang ◽  
Lichao Dong ◽  
Peipei Yang ◽  
Yuanyuan Li ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Self Assembly ◽  
Induced Circular Dichroism ◽  
Circularly Polarized ◽  
Aggregation Induced Emission ◽  
Self Assembling ◽  
Emission Enhancement ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Circular Dichroïsm

AIEE-active chiral pentaphenylpyrrole derivatives possess AICD and circularly polarized luminescence features with self-assembling to regular nanofibers.

l-Valine methyl ester-containing tetraphenylethene: aggregation-induced emission, aggregation-induced circular dichroism, circularly polarized luminescence, and helical self-assembly

2014 ◽  
Vol 1 (5) ◽  
pp. 518-521 ◽  
Author(s):  
Hongkun Li ◽  
Juan Cheng ◽  
Yihua Zhao ◽  
Jacky W. Y. Lam ◽  
Kam Sing Wong ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Methyl Ester ◽  
Self Assembly ◽  
Induced Circular Dichroism ◽  
Circularly Polarized ◽  
Aggregation Induced Emission ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Circular Dichroïsm

Val-TPE shows aggregation-induced emission, aggregation-induced circular dichroism, circularly polarized luminescence and the capacity to self-assemble into helical nanofibers.

scholarly journals Ligand Induced Circular Dichroism and Circularly Polarized Luminescence in CdSe Quantum Dots

ACS Nano ◽  
2013 ◽  
Vol 7 (12) ◽  
pp. 11094-11102 ◽  
Author(s):  
Urice Tohgha ◽  
Kirandeep K. Deol ◽  
Ashlin G. Porter ◽  
Samuel G. Bartko ◽  
Jung Kyu Choi ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Circular Dichroism ◽  
Cdse Quantum Dots ◽  
Induced Circular Dichroism ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Circular Dichroïsm

scholarly journals Chiral Pentaphenylpyrrole Derivatives with Aggregation-Induced Emission Enhancement and Aggregation Induced Circular Dichroism and Their Helical Self-assembly

2021 ◽  
Vol 267 ◽  
pp. 02012
Author(s):  
Yuanyuan Wang ◽  
Longlong Zhang ◽  
Junge Zhi
Keyword(s):  
Circular Dichroism ◽  
Self Assembly ◽  
Nano Particles ◽  
Mixed Solution ◽  
Induced Circular Dichroism ◽  
Aggregation Induced Emission ◽  
Water Fraction ◽  
Chiral Compounds ◽  
Emission Enhancement ◽  
Circular Dichroïsm

A pair of enantiomers (S)-P5PdiAM and (R)-P5PdiAM containing two chiral substituents, and their raceme rac-P5PdiAM were synthesized by introducing (R)-/(S)- or racemic 1-phenylethylamine into 1-biphenyl-2,3,4,5-tetraphenylpyrrole. The target compounds all show weak aggregation-induced emission enhancement (AIEE) characteristics in the DMSO/H2O mixed system, indicating that the introduction of chirality hardly affect the photophysical properties of the compound. In addition, the chiral compounds (S)-P5PdiAM and (R)-P5PdiAM show strong circular dichroism (CD) signals in THF/H2O mixed solution with a water fraction of 70%, that is, they exhibit aggregation-induced circular dichroism characteristics (AICD). Because the aggregates of (S)-P5PdiAM and (R)-P5PdiAM emit weakly, there is no circularly polarized luminescence (CPL) signals upon aggregation. The chiral compounds (S)-P5PdiAM and (R)-P5PdiAM can self-assemble to form helical nanofibers in a THF/H2O mixture with a water fraction of 70%, while the racemic rac-P5PdiAM assembled to form nano-particles, indicating that chiral substituents have a great influence on the self-assembly and the morphologies of the nano-aggregates.

scholarly journals Questions of Mirror Symmetry at the Photoexcited and Ground States of Non-Rigid Luminophores Raised by Circularly Polarized Luminescence and Circular Dichroism Spectroscopy: Part 1. Oligofluorenes, Oligophenylenes, Binaphthyls and Fused Aromatics

Molecules ◽  
2018 ◽  
Vol 23 (10) ◽  
pp. 2606 ◽  
Author(s):  
Michiya Fujiki ◽  
Julian Koe ◽  
Takashi Mori ◽  
Yoshihiro Kimura
Keyword(s):  
Circular Dichroism ◽  
Mirror Symmetry ◽  
Neutral Current ◽  
Visible Region ◽  
Cd Spectroscopy ◽  
Mirror Image ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Circular Dichroïsm

We report experimental tests of whether non-rigid, π-conjugated luminophores in the photoexcited (S1) and ground (S0) states dissolved in achiral liquids are mirror symmetrical by means of circularly polarized luminescence (CPL) and circular dichroism (CD) spectroscopy. Herein, we chose ten oligofluorenes, eleven linear/cyclic oligo-p-arylenes, three binaphthyls and five fused aromatics, substituted with alkyl, alkoxy, phenyl and phenylethynyl groups and also with no substituents. Without exception, all these non-rigid luminophores showed negative-sign CPL signals in the UV-visible region, suggesting temporal generation of energetically non-equivalent non-mirror image structures as far-from equilibrium open-flow systems at the S1 state. For comparison, unsubstituted naphthalene, anthracene, tetracene and pyrene, which are achiral, rigid, planar luminophores, did not obviously show CPL/CD signals. However, camphor, which is a rigid chiral luminophore, showed mirror-image CPL/CD signals. The dissymmetry ratio of CPL (glum) for the oligofluorenes increased discontinuously, ranging from ≈ −(0.2 to 2.0) × 10−3, when the viscosity of the liquids increased. When the fluorene ring number increased, the glum value extrapolated at [η] = 0 reached −0.8 × 10−3 at 420 nm, leading to (–)-CPL signals predicted in the vacuum state. Our comprehensive CPL and CD study should provide a possible answer to the molecular parity violation hypothesis arising due to the weak neutral current mediated by the Z0-boson.

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+.

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.

Sign in / Sign up

Export Citation Format

Share Document