Preparation and property manipulation of high efficiency circularly polarized luminescent liquid crystal polypeptides

Abstract

A series of novel high efficiency CPL-active side-chain chiral liquid crystal polypeptides were obtained.

Frontiers in circularly polarized luminescence: molecular design, self-assembly, nanomaterials, and applications

“…Inspired by the circularly polarized reflection in nature and living organisms involving the formation of self-organizing chiral nematic photonic structures [147][148][149], CPL-active polymers were prepared by taking chiral LCs and crystalline polymers as CPL filters [150][151][152][153][154][155]. In these systems, interand intra-molecular interactions between chiral and fluorescent substances are no longer indispensable, and the obtained materials generally possess high g lum values.…”

Acid Stimuli Responsive CPL from Supramolecular Assembly of AIE Molecule

“…Materials with circularly polarized luminescence (CPL), which shows a certain different intensity between left and right circular polarization when excited by light, − have attracted more and more attention because of their applications in chiral optoelectronics, − 3D optical displays, , information security encryption, , and so on. Organic CPL materials are endowed with unlimited potential in the future due to their inherent advantages of wide variety, readily accessibility, tunable emission, and high quantum efficiency . Generally, organic CPL materials can be obtained through (1) linking the luminescent components to chiral organic small molecules or polymers by covalent bonds, − (2) linking the chiral side chains to the conjugated luminescent polymers by covalent bonds, and (3) combining the chiral molecules and luminescent molecules by noncovalent bonds interactions, like hydrogen bonds, electrostatic interaction, π–π stacking, ligand coordination, and so on, which is known as supermolecular assembly. ,,− …”

“…Organic CPL materials prepared through supermolecular assembly have attracted a lot of interest because of their solution processability and easy functionalization. , In general, a supermolecular assembly with CPL property has two parts: one provides chirality, and the other provides luminescence . There are three typical approaches to generate CPL for supramolecular assemblies: (1) the achiral fluorescent molecule self-assembles under certain conditions, (2) the chirality can be transferred from the chiral molecule to the nonchiral fluorescent molecule through the assembly, and (3) the chiral fluorescent molecule assembles asymmetrically .…”

“…Organic CPL materials are endowed with unlimited potential in the future due to their inherent advantages of wide variety, readily accessibility, tunable emission, and high quantum efficiency. 10 Generally, organic CPL materials can be obtained through (1) linking the luminescent components to chiral organic small molecules or polymers by covalent bonds, 11−18 (2) linking the chiral side chains to the conjugated luminescent polymers by covalent bonds, 14 and (3) combining the chiral molecules and luminescent molecules by noncovalent bonds interactions, like hydrogen bonds, electrostatic interaction, π−π stacking, ligand coordination, and so on, which is known as supermolecular assembly. 15,16,19−24 Organic CPL materials prepared through supermolecular assembly have attracted a lot of interest because of their solution processability and easy functionalization.…”

K+, Sr2+-Triggered Phase Transitions from Chiral Thermotropic Liquid Crystalline to G-Quadruplex CTLC with Circularly Polarized Luminescence

“…Nondoped CPL LCs, incorporating aggregation-induced emission (AIE) luminogens into chiral cholesterol through covalent bonds, a series of elaborated mesogens have been designed and synthesized. During cooling from isotropic temperature ( T i ) to the room temperature, they exhibit bright CPL and large QY via LC self-organization. − Point-chiral platinum­(II) complexes, side-chain chiral polymers or polyacetylene derivatives bearing 4-nonyloxy phenyl groups display thermotropic behavior and emit strong circularly polarized light in LCs. − The helical organizations impart effective chirality amplification to nondoped chiral LC materials, thereby inducing the high CPL performance with large g lum values. , Nevertheless, the tedious synthetic process hinders seriously the exploitation of nondoped CPL LCs.…”