scholarly journals Chiroptical Polymer Functionalized by Chiral Nanofibrillar Network

2021 ◽  
Author(s):  
Hirotaka Ihara ◽  
Makoto Takafuji ◽  
Yutaka Kuwahara
Keyword(s):  
Chemical Synthesis ◽  
Optical Signal ◽  
Organic System ◽  
Circularly Polarized ◽  
Self Assembling ◽  
Optical Film ◽  
Wide Range ◽  
Circularly Polarized Luminescence ◽  
Life Phenomena ◽  
Chirality Induction

Chirality is one of the basic factors that influence a wide range of activities from chemical synthesis to tissue construction in life phenomena. Recently, researchers have attempted to use chirality as an optical signal. In animals, it is used to transmit information to insects and crustaceans, and it has also been confirmed that it promotes growth in plants. This chapter presents a new organic system that produces a chiral optical signal, that is, circularly polarized luminescence (CPL), which has been attracting attention in recent years. In particular, the chapter is focused on the generating CPL through chirality induction with the chiral self-assembling phenomenon and explaining its application as an optical film.

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.

Circularly polarized electroluminescence from achiral fluorophore induced by co-assembly containing chiral polymer

2021 ◽  
Author(s):  
Zhongxing Geng ◽  
Yuxia Zhang ◽  
Yu Zhang ◽  
Yang Li ◽  
Yiwu Quan ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Circularly Polarized ◽  
Organic Light ◽  
Induction Mechanism ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Chirality Induction ◽  
Chiral Polymer

Recently, much attention has been paid to circularly polarized luminescence (CPL) organic light-emitting diodes (CP-OLEDs) from achiral fluorophore through intermolecular chirality induction mechanism. In this paper, we developed a new...

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.

Recent progress in research on stimuli-responsive circularly polarized luminescence based on π-conjugated molecules

2013 ◽  
Vol 85 (10) ◽  
pp. 1967-1978 ◽  
Author(s):  
Hiromitsu Maeda ◽  
Yuya Bando
Keyword(s):  
Recent Progress ◽  
Short Review ◽  
Active Species ◽  
Stimuli Responsive ◽  
Conjugated Molecules ◽  
Circularly Polarized ◽  
Pi Conjugated ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Chirality Induction

This short review article summarizes recent progress in research on various stimuli-responsive circularly polarized luminescence (CPL) properties derived from π-conjugated molecules and related materials. As representative examples, assembled structures of chiral π-conjugated polymers and molecules showed tunable CPL resulting from the enhancement of chirality induction by aggregation. Fascinating CPL-active species, pyrrole-based anion-responsive π-conjugated molecules exhibiting CPL induced by anion binding and ion pairing, are also discussed.

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.

Factors Affecting Molecular Self-Assembly and Its Mechanism

2012 ◽  
Vol 9 (1) ◽  
pp. 43 ◽  
Author(s):  
Hueyling Tan
Keyword(s):  
Self Assembly ◽  
Building Blocks ◽  
Molecular Engineering ◽  
Molecular Structures ◽  
Polymer Science ◽  
New Approach ◽  
Factors Affecting ◽  
Dna Structures ◽  
Self Assembling ◽  
Wide Range

Molecular self-assembly is ubiquitous in nature and has emerged as a new approach to produce new materials in chemistry, engineering, nanotechnology, polymer science and materials. Molecular self-assembly has been attracting increasing interest from the scientific community in recent years due to its importance in understanding biology and a variety of diseases at the molecular level. In the last few years, considerable advances have been made in the use ofpeptides as building blocks to produce biological materials for wide range of applications, including fabricating novel supra-molecular structures and scaffolding for tissue repair. The study ofbiological self-assembly systems represents a significant advancement in molecular engineering and is a rapidly growing scientific and engineering field that crosses the boundaries ofexisting disciplines. Many self-assembling systems are rangefrom bi- andtri-block copolymers to DNA structures as well as simple and complex proteins andpeptides. The ultimate goal is to harness molecular self-assembly such that design andcontrol ofbottom-up processes is achieved thereby enabling exploitation of structures developed at the meso- and macro-scopic scale for the purposes oflife and non-life science applications. Such aspirations can be achievedthrough understanding thefundamental principles behind the selforganisation and self-synthesis processes exhibited by biological systems.

Research progress on organic self-assembling low-dimensional circularly polarized luminescent materials

2020 ◽  
Vol 13 (0) ◽  
pp. 1-11
Author(s):  
WANG Meng-Zhu ◽  
◽  
DENG Yong-Jing ◽  
LIU Shu-Juan ◽  
ZHAO Qiang
Keyword(s):  
Research Progress ◽  
Luminescent Materials ◽  
Circularly Polarized ◽  
Self Assembling ◽  
Low Dimensional

Circularly polarized luminescence spectroscopy

1977 ◽  
Vol 77 (6) ◽  
pp. 773-792 ◽  
Author(s):  
Frederick S. Richardson ◽  
James P. Riehl
Keyword(s):  
Luminescence Spectroscopy ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

scholarly journals Self-assembling ferritin-dendrimer nanoparticles for targeted delivery of nucleic acids to myeloid leukemia cells

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Federica Palombarini ◽  
Silvia Masciarelli ◽  
Alessio Incocciati ◽  
Francesca Liccardo ◽  
Elisa Di Fabio ◽  
...  
Keyword(s):  
Nucleic Acid ◽  
Targeted Delivery ◽  
Myeloid Leukemia ◽  
Electrostatic Interactions ◽  
Archaeoglobus Fulgidus ◽  
Leukemia Cells ◽  
Cellular Delivery ◽  
Self Assembling ◽  
Wide Range ◽  
Hybrid Nanoparticle

Abstract Background In recent years, the use of ferritins as nano-vehicles for drug delivery is taking center stage. Compared to other similar nanocarriers, Archaeoglobus fulgidus ferritin is particularly interesting due to its unique ability to assemble-disassemble under very mild conditions. Recently this ferritin was engineered to get a chimeric protein targeted to human CD71 receptor, typically overexpressed in cancer cells. Results Archaeoglobus fulgidus chimeric ferritin was used to generate a self-assembling hybrid nanoparticle hosting an aminic dendrimer together with a small nucleic acid. The positively charged dendrimer can indeed establish electrostatic interactions with the chimeric ferritin internal surface, allowing the formation of a protein-dendrimer binary system. The 4 large triangular openings on the ferritin shell represent a gate for negatively charged small RNAs, which access the internal cavity attracted by the dense positive charge of the dendrimer. This ternary protein-dendrimer-RNA system is efficiently uptaken by acute myeloid leukemia cells, typically difficult to transfect. As a proof of concept, we used a microRNA whose cellular delivery and induced phenotypic effects can be easily detected. In this article we have demonstrated that this hybrid nanoparticle successfully delivers a pre-miRNA to leukemia cells. Once delivered, the nucleic acid is released into the cytosol and processed to mature miRNA, thus eliciting phenotypic effects and morphological changes similar to the initial stages of granulocyte differentiation. Conclusion The results here presented pave the way for the design of a new family of protein-based transfecting agents that can specifically target a wide range of diseased cells. Graphic abstract

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