Frontiers in Circularly Polarized Phosphorescent Materials

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(20)

Published: Feb. 20, 2023

Abstract Circularly polarized luminescence (CPL) materials have received increasing attention in recent years. Amongst various CPL materials, circularly phosphorescence (CPP) featuring long life‐time represent a novel research frontier and exhibit promising applications fields. Herein, the state‐of‐the‐art advances of CPP are systematically summarized, as classified into transition metal complexes, organic small molecules, polymers, organic/inorganic hybrid materials. Besides, light‐emitting diodes encryption display also summarized. Furthermore, current challenges future perspectives put forward. It is expected that this review will offer more inspirations for rational design advanced thus further promoting their practical applications.

Language: Английский

---

Polymer‐Based Circularly Polarized Luminescent Materials

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 11(6)

Published: Jan. 19, 2023

Abstract Chiral materials capable of generating circularly polarized luminescence (CPL) have gained rapidly growing research interest by virtue their peculiar photophysical characteristics and far‐reaching applications. Amongst various CPL materials, polymer‐based constituted an important class owing to abundant types, ease manufacture, high thermal stability, as well as, tunable properties. The present work reviews the latest advances in constructing which are classified based on interaction modes between chiral luminescent components, that is, covalent interaction, non‐covalent without interactions. newly emerging categories nonconventional fluorescence‐based room temperature phosphorescence, with thermally activated delayed fluorescence properties also presented. Typical applications emitters organic light‐emitting diodes, information security encryption, optical sensors further discussed. Additionally, current challenges future perspectives this field summarized. This review article is expected stimulate more unprecedented achievements derived from thus promoting practical

Language: Английский

---

Mechanically Responsive Circularly Polarized Luminescence from Cellulose Nanocrystal‐based Shape‐Memory Polymers

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(29)

Published: April 6, 2023

Stimulus-responsive materials that display circularly polarized luminescence (CPL) have attracted great attention for application in chiral sensors and smart displays. However, due to difficulties the regulation of structures, fine control CPL remains a challenge. Here, it is demonstrated cellulose nanocrystal shape-memory polymers (CNC-SMPs) with luminescent components enable mechanically responsive CPL. The nematic organization CNCs material gives rise photonic bandgap. By manipulating bandgap or wavelengths CNC-SMPs, precise emission varied high dissymmetry factors (glum ) achieved. Specifically, can be switched reversibly by treating CNC-SMPs hot-pressing recovery heating. Pressure-responsive tunable glum values ascribed pressure-responsive bandgaps. Moreover, colorimetric CPL-active patterns are created imprinting desired forms into SMP samples. This study demonstrates novel way fabricate systems using biomaterials.

Language: Английский

---

Circularly Polarized Organic Ultralong Room‐Temperature Phosphorescence with A High Dissymmetry Factor in Chiral Helical Superstructures

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(7)

Published: Aug. 26, 2023

Abstract Long‐lived room‐temperature phosphorescence (RTP) of organic materials holds a significant potential for optical information. Circularly polarized ultralong (CP‐OURTP) with extremely high dissymmetry factor ( g lum ) values is even highly demanded and considerably challenging. Here, an effective strategy introduced to realize CP‐OURTP emission decay time 735 ms value up 1.49, which exceeds two orders magnitude larger than previous records, through system composed RTP polymers chiral helical superstructures. The exhibits excellent stability under multiple cycles photoirradiation thermal treatment, further employed information encryption based on multiplexing. results are anticipated lay the foundation development in advanced photonic applications.

Language: Английский

---

Strong and Multicolor‐Tunable Pure Organic Circularly Polarized Room‐Temperature Phosphorescence from Cholesteric Liquid Crystal

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 11(21)

Published: June 25, 2023

Abstract Pure organic circularly polarized room‐temperature phosphorescence (CPRTP) materials show significant promise for applications in advanced anti‐counterfeiting, biological imaging, and so on. However, it remains challenging to prepare CPRTP with a high luminescence dissymmetry factor (g lum ). This article provides simple efficient method pure g from cholesteric liquid crystals by incorporation of achiral phosphorescent chromophore dibenzofuran into chiral cholesterol mesogen via flexible spacer. The findings that the synthetic compound Chol‐C6‐DF can form effectively amplify value through selective reflection. film produce yellow when excited chromophore. value, lifetime, quantum yield produced under excitation 380 nm light are −0.19, 567.7 ms, 3.2%, respectively. Even more interesting is also exhibits RTP clustering‐triggered emission characteristics. lifetime red 420 ‐0.11 1.11 s. Under 410, 430, 470 light, yields 19.0%, 20.2%, 19.1%,

Language: Английский

---

Chiroptical Amplification of Induced Circularly Polarized Luminescence in Nucleotide‐Templated Supramolecular Polymer

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(38)

Published: Aug. 3, 2023

Efficient circularly polarized luminescence (CPL) from purely organic molecules holds great promise for applications in displays, sensing, and bioimaging. However, achieving high dissymmetry values (glum ) chromophores remains a significant challenge. Herein, we present bioinspired approach using adenosine triphosphate (ATP)-triggered supramolecular polymerization of naphthalene diimide-derived monomer (ANSG) to induce CPL with remarkable glum value 1.1×10-2 . The ANSG undergo templated, chiral self-assembly through cooperative growth mechanism the presence ATP, resulting scrolled nanotubes aggregation-induced enhanced emission (AIEE) induced CPL. Furthermore, demonstrate concept chiroptical amplification by efficiently amplifying asymmetry mixture ATP achiral pyrophosphate. This innovative opens numerous opportunities emerging field luminescence.

Language: Английский

---

Aqueous Circularly Polarized Luminescence Induced by Homopolypeptide Self-Assembly

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(50), P. 27282 - 27294

Published: Dec. 8, 2023

Remarkable advances have been achieved in solution self-assembly of polypeptides from the perspective nanostructures, mechanisms, and applications. Despite intrinsic chirality polypeptides, promising generation aqueous circularly polarized luminescence (CPL) based on their has rarely reported due to weak fluorescence most indeterminate mechanism. Here, we propose a facile strategy for achieving CPL simple homopolypeptides modified with terminal group featuring both twisted intramolecular charge transfer aggregation-induced emission properties. A morphology-dependent can be observed under different conditions by altering solvents. nanotoroid-dispersed detectable obtained using tetrahydrofuran as good solvent self-assembly, which is attributed involvement chiral environment formed homopolypeptide chains. However, such packing mode cannot realized nanorods self-assembled dioxane, resulting an inactive phenomenon. Furthermore, signals greatly amplified co-assembly achiral small molecule derived group. This work not only provides pathway construct CPL-active nanomaterials but also reveals potential mechanism production, transfer, amplification polypeptide-based nanostructures.

Language: Английский

---

Chiral Phosphorescent Carbonized Polymer Dots Relayed Light‐Harvesting System for Color‐Tunable Circularly Polarized Room Temperature Phosphorescence

Small, Journal Year: 2023, Volume and Issue: unknown

Published: Nov. 22, 2023

Abstract Carbonized polymer dots (CPDs) with a circularly polarized fluorescence property have received increasing attention in recent years. However, it is still great challenge to construct room‐temperature phosphorescence (CPRTP) CPDs. Herein, simple approach the synthesis of intrinsically CPRTP CPDs for first time by utilizing sodium alginate and l ‐/ d ‐arginine as precursors under relatively mild reaction conditions presented. Notably, exhibit both chirality green RTP solid states. Furthermore, color‐tunable successfully achieved engineering chiral light‐harvesting systems based on resonance energy transfer ( C ‐PRET) where function an initiator light absorbance, commercially available fluorescent dyes different emission colors ranging from yellow red serve terminal acceptors. Through one‐step or sequential ‐PRET, can simultaneously furnish transmission/amplification. Given multicolor long afterglow, lifetime‐tunable, properties, their potential applications multiple information encryption are demonstrated.

Language: Английский

---

Chiral silver cluster-based light-harvesting systems: Enantioselective chirality transfer and amplified circularly polarized luminescence

Chem, Journal Year: 2024, Volume and Issue: 10(6), P. 1766 - 1782

Published: Feb. 21, 2024

Language: Английский

---

Free-standing iridescent films: Crafting circularly polarized luminescence from blue to NIR-II for enhanced anti-counterfeiting performance

Nano Today, Journal Year: 2024, Volume and Issue: 55, P. 102197 - 102197

Published: Feb. 9, 2024

Language: Английский

---