scholarly journals Generating Circularly Polarized Light from Clustering‐Triggered Emission Using Solid Phase Molecular Self-Assembly

2021 ◽  
Author(s):  
Peilong Liao ◽  
Shihao Zang ◽  
Tongyue Wu ◽  
Hongjun Jin ◽  
Wenkai Wang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Solid Phase ◽  
Polarized Light ◽  
Supramolecular Polymers ◽  
Mechanical Pressure ◽  
Renewable Materials ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
First Case ◽  
Surface Charge Distribution

Abstract Clustering-triggered emission (CTE) has displayed promising abilities in bioimaging, chemical sensing, and multicolor luminescence. However, it remains absent in the field of circularly polarized emission (CPL) due to the difficulties in well-aligning the nonconventional luminogens. We report the first case of CPL generated with CTE using the solid phase molecular self-assembly(SPMSA) of poly-L-lysine(PLL) and sodium oleate (OL). Under mechanical pressure, the electrostatic complex of PLL/OL form supramolecular film in which the OL ions self-assemble into lamellar mesophases bridged by the PLL chains. Since the OL mesophases are very alike giant 2D rigid supramolecular polymers with well-defined surface charge distribution, the PLL chains are forced to fold regularly as a requirement of optimal electrostatic interaction. Further facilitated by hydrogen bonding, the O and N atoms that form through space conjugation aligned orderly on the 2D surface, leading to CTE-based CPL. The CTE-based CPL is in analogy with conventional emission, which is capable to transfer its energy to a donor via a FRET process, making it possible to develop environmental friendly and economic CPL from sustained and renewable materials.

scholarly journals Generating circularly polarized luminescence from clusterization‐triggered emission using solid phase molecular self-assembly

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Peilong Liao ◽  
Shihao Zang ◽  
Tongyue Wu ◽  
Hongjun Jin ◽  
Wenkai Wang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Electrostatic Interactions ◽  
Solid Phase ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Mechanical Pressure ◽  
Renewable Materials ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

AbstractPurely-organic clusterization‐triggered emission (CTE) has displayed promising abilities in bioimaging, chemical sensing, and multicolor luminescence. However, it remains absent in the field of circularly polarized luminescence (CPL) due to the difficulties in well-aligning the nonconventional luminogens. We report a case of CPL generated with CTE using the solid phase molecular self-assembly (SPMSA) of poly-L-lysine (PLL) and oleate ion (OL), that is, the macroscopic CPL supramolecular film self-assembled by the electrostatic complex of PLL/OL under mechanical pressure. Well-defined interface charge distribution, given by lamellar mesophases of OL ions, forces the PLL chains to fold regularly as a requirement of optimal electrostatic interactions. Further facilitated by hydrogen bonding, the through-space conjugation (TSC) of orderly aligned electron-rich O and N atoms leads to CTE-based CPL, which is capable of transferring energy to an acceptor via a Förster resonance energy transfer (FRET) process, making it possible to develop environmentally friendly and economic CPL from sustainable and renewable materials.

scholarly journals Circularly Polarized Light Detection by Chiral Photonic Cellulose Nanocrystal with ZnO Photoconductive Layer in Ultraviolet Region

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3098
Author(s):  
Boyu Zhang ◽  
Sixiang Zhao ◽  
Yingying Yu ◽  
Ming Li ◽  
Liancheng Zhao ◽  
...  
Keyword(s):  
Self Assembly ◽  
Polarization State ◽  
Polarized Light ◽  
Cellulose Nanocrystal ◽  
Ultraviolet Region ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Left Handed ◽  
Chiral Nematic ◽  
Wide Range

Circularly polarized light (CPL) detection and polarization state recognition are required for a wide range of applications. Conventional polarization detection with optical components causes difficulties for miniaturization and integration. An effective design strategy is proposed for direct CPL detection with chiral material. Here, we realized direct CPL detection based on the combination of chiral photonic cellulose nanocrystal (CNC) and ultraviolet-sensitive ZnO photoconductive material. The CNC layer deposited by evaporation-induced self-assembly established the left-handed chiral nematic structure with a photonic bandgap (PBG) to recognize left-handed CPL (LCPL) and right-handed CPL (RCPL) at specific wavelengths. The PBG of CNC layer has been modulated by the adjustment of chiral nematic pitch to match the semiconductor bandgap of ZnO film in ultraviolet region. The photocurrents under RCPL and LCPL are 2.23 × 10−6 A and 1.77 × 10−6 A respectively and the anisotropy factor Δgpc of 0.23 is acquired for the CPL detection based on the chiral photonic CNC. This design provides a new approach to the detection of CPL polarization state with competitive performance.

scholarly journals Circularly polarized luminescence from organic micro-/nano-structures

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Yongjing Deng ◽  
Mengzhu Wang ◽  
Yanling Zhuang ◽  
Shujuan Liu ◽  
Wei Huang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Polarized Light ◽  
Design Principles ◽  
Active Materials ◽  
High Quantum Efficiency ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Nano Structures ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

AbstractCircularly polarized light exhibits promising applications in future displays and photonic technologies. Circularly polarized luminescence (CPL) from chiral luminophores is an ideal approach to directly generating circularly polarized light, in which the energy loss induced by the circularly polarized filters can be reduced. Among various chiral luminophores, organic micro-/nano-structures have attracted increasing attention owing to the high quantum efficiency and luminescence dissymmetry factor. Herein, the recent progress of CPL from organic micro-/nano-structures is summarized. Firstly, the design principles of CPL-active organic micro-/nano-structures are expounded from the construction of micro-/nano-structure and the introduction of chirality. Based on these design principles, several typical organic micro-/nano-structures with CPL activity are introduced in detail, including self-assembly of small molecules, self-assembly of π-conjugated polymers, and self-assembly on micro-/nanoscale architectures. Subsequently, we discuss the external stimuli that can regulate CPL performance, including solvents, pH value, metal ions, mechanical force, and temperature. We also summarize the applications of CPL-active materials in organic light-emitting diodes, optical information processing, and chemical and biological sensing. Finally, the current challenges and prospects in this emerging field are presented. It is expected that this review will provide a guide for the design of excellent CPL-active materials.

scholarly journals Circularly polarized light modulated supramolecular self-assembly for an azobenzene-based chiral gel

RSC Advances ◽  
2019 ◽  
Vol 9 (18) ◽  
pp. 10360-10363 ◽  
Author(s):  
Kenan Shao ◽  
Ziyu Lv ◽  
Yuting Xiong ◽  
Guodong Li ◽  
Dongdong Wang ◽  
...  
Keyword(s):  
Traditional Knowledge ◽  
Self Assembly ◽  
Polarized Light ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Left Handed

An unconventional supramolecular self-assembly triggered by left-handed circularly polarized light breaks the traditional knowledge of azobenzene photoisomerization.

scholarly journals Homochiral Supramolecular Thin Film from Self-Assembly of Achiral Triarylamine Molecules by Circularly Polarized Light

Molecules ◽  
2020 ◽  
Vol 25 (2) ◽  
pp. 402
Author(s):  
Changjun Park ◽  
Jinhee Lee ◽  
Taehyoung Kim ◽  
Jaechang Lim ◽  
Jeyoung Park ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Self Assembly ◽  
Polarized Light ◽  
Building Blocks ◽  
The Self ◽  
Assembly Process ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Self Assembled

Here, we report the formation of homochiral supramolecular thin film from achiral molecules, by using circularly polarized light (CPL) only as a chiral source, on the condition that irradiation of CPL does not induce a photochemical change of the achiral molecules. Thin films of self-assembled structures consisting of chiral supramolecular fibrils was obtained from the triarylamine derivatives through evaporation of the self-assembled triarylamine solution. The homochiral supramolecular helices with the desired handedness was achieved by irradiation of circularly polarized visible light during the self-assembly process, and the chiral stability of supramolecular self-assembled product was achieved by photopolymerization of the diacetylene moieties at side chains of the building blocks, with irradiation of circularly polarized ultraviolet light. This work provides a novel methodology for the generation of homochiral supramolecular thin film from the corresponding achiral molecules.

Chiral induction, modulation and locking in porphyrin based supramolecular assemblies with circularly polarized light

2019 ◽  
Vol 55 (34) ◽  
pp. 4953-4956 ◽  
Author(s):  
Jingang Hu ◽  
Yifan Xie ◽  
Hongli Zhang ◽  
Chenlu He ◽  
Qijin Zhang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Polarized Light ◽  
Supramolecular Assemblies ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Chiral Induction ◽  
Assembly Strategy ◽  
Porphyrin Derivatives

Herein, we propose a novel circularly polarized light (CPL) triggered asymmetric self-assembly strategy to controllably construct chiral supramolecular assemblies from achiral porphyrin derivatives.

Differential polarization imaging of sickled cells

1988 ◽  
Vol 46 ◽  
pp. 62-63
Author(s):  
Marcos F. Maestre
Keyword(s):  
Optical Properties ◽  
Theoretical Approach ◽  
Polarized Light ◽  
Polarization Microscopy ◽  
Spectroscopic Techniques ◽  
Polarization Imaging ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Microscopic Scale ◽  
Chiral Structures

Recently we have developed a form of polarization microscopy that forms images using optical properties that have previously been limited to macroscopic samples. This has given us a new window into the distribution of structure on a microscopic scale. We have coined the name differential polarization microscopy to identify the images obtained that are due to certain polarization dependent effects. Differential polarization microscopy has its origins in various spectroscopic techniques that have been used to study longer range structures in solution as well as solids. The differential scattering of circularly polarized light has been shown to be dependent on the long range chiral order, both theoretically and experimentally. The same theoretical approach was used to show that images due to differential scattering of circularly polarized light will give images dependent on chiral structures. With large helices (greater than the wavelength of light) the pitch and radius of the helix could be measured directly from these images.

Blue Circularly Polarized Luminescent Amorphous Molecules with Single-handed Propeller Chirality Induced by Circularly Polarized Light Irradiation

2021 ◽  
Author(s):  
Zhaoming Zhang ◽  
Takunori Harada ◽  
Adriana Pietropaolo ◽  
Yuting Wang ◽  
Yue Wang ◽  
...  
Keyword(s):  
Polarized Light ◽  
Light Irradiation ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Trigonal Symmetry ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

Preferred-handed propeller conformation was induced by circularly polarized light irradiation to three amorphous molecules with trigonal symmetry, and the molecules with induced chirality efficiently exhibited blue circularly polarized luminescence. In...

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