Metal-organic materials with circularly polarized luminescence

Coordination Chemistry Reviews, Год журнала: 2022, Номер 468, С. 214640 - 214640

Опубликована: Июнь 2, 2022

Язык: Английский

---

Circularly polarized perovskite luminescence with dissymmetry factor up to 1.9 by soft helix bilayer device

Matter, Год журнала: 2022, Номер 5(7), С. 2319 - 2333

Опубликована: Май 31, 2022

Язык: Английский

---

Macroscopic Assembly of Chiral Hydrogen‐bonded Metal‐free Supramolecular Glasses for Enhanced Color‐tunable Ultralong Room Temperature Phosphorescence

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(28)

Опубликована: Май 12, 2023

Glassy materials, with desirable mechanical rigidity, shaping ability, high transparency, are attracting great interest in diverse fields. However, optically bulk molecule-based glasses still rare, mainly due to limited monomeric species and harsh preparation conditions. Herein, we report a facile bottom-up solution fabrication process obtain metal-free supramolecular (SMGs) at the macroscopic scale using L-Histidine hexamethylenetetramine as building blocks. The chiral SMGs possess color-tunable ultralong room temperature phosphorescence (decay lifetime up 141.2 ms) circular polarized luminescence (g factor 8.7×10-3 ). strong hydrogen bonds effectively drive formation of SMGs, provide rigid microenvironment boost triplet exciton generation. By virtue excitation- temperature-dependent applications including multicolored displays, visual UV detection, persistently luminescent thermometer demonstrated.

Язык: Английский

---

Double helical π-aggregate nanoarchitectonics for amplified circularly polarized luminescence

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Март 31, 2022

The canonical double helical π-stacked array of base pairs within DNA interior has inspired the interest in supramolecular architectures with advanced electronic, magnetic and optical functions. Here, we report a selective-recognized chirality-matched co-assembly strategy for fabrication fluorescent π-amino acids into π-aggregates, which show exceptional strong circularly polarized luminescence (CPL). single crystal structure optimal combination co-assemblies shows that double-stranded organization these is cooperatively assisted by both CH-π hydrogen-bond arrays chirality match. well-defined spatial arrangement π-chromophores could effectively suppress non-radiative decay pathways facilitate chiral exciton couplings, leading to superior CPL figure merit (g

Язык: Английский

---

Supramolecular chiral polymeric aggregates: Construction and applications

Aggregate, Год журнала: 2022, Номер 4(1)

Опубликована: Сен. 6, 2022

Abstract Inspired by the mystery of natural homochirality, design and construction artificial chiral systems with special functions including mechanics, chiroptical devices, separation have aroused great interest scientists. Due to its diverse conformations components, polymers become an excellent candidate construct aggregates, which provides opportunity fabricate advanced materials. Herein, in this review, we summarized not only different strategies for regulation supramolecular chirality or achiral polymer systems, mainly post‐assembly polymerization‐induced self‐assembly several transfer induction but also formation mechanisms aggregates amplification from molecular level level. Furthermore, present typical applications polymeric circularly polarized light emission, recognition separation, elastomer. Finally, current challenges future directions are elaborated.

Язык: Английский

---

Frontiers in Circularly Polarized Phosphorescent Materials

Advanced Functional Materials, Год журнала: 2023, Номер 33(20)

Опубликована: Фев. 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.

Язык: Английский

---

Multifunctional Chiral 2D Lead Halide Perovskites with Circularly Polarized Photoluminescence and Piezoelectric Energy Harvesting Properties

ACS Nano, Год журнала: 2022, Номер 16(2), С. 3221 - 3230

Опубликована: Фев. 10, 2022

Introducing the chiral spacers to two-dimensional (2D) lead halide perovskites (LHPs) enables them exhibit circularly polarized photoluminescence (CPPL), which could have applications in chiral-optics and spintronics. Despite that a great deal of effort has been made this field, reported polarization degree CPPL at ambient conditions is still very limited, integration multiple functionalities also remains be explored. Here we report structures, CPPL, piezoelectric energy harvesting properties 2D LHPs, [R-1-(4-bromophenyl)ethylaminium]2PbI4 (R-[BPEA]2PbI4) [S-1-(4-bromophenyl)ethylaminium]2PbI4 (S-[BPEA]2PbI4). Our results show these are direct bandgap semiconductors centered ∼513 nm with maximum up 11.0% room temperature. In addition, unique configurational arrangement found able reduce interlayer π-π interactions consequently result strong electron-phonon coupling. Furthermore, intrinsic chirality both R-[BPEA]2PbI4 S-[BPEA]2PbI4 active, their composite films can applied generate voltages currents ∼0.6 V ∼1.5 μA under periodic impacting strength 2 N, respectively. This work not only reports high but demonstrates behavior for realizing multifunctionalities LHPs.

Язык: Английский

---

Boosting Circularly Polarized Luminescence Performance by a Double π-Helix and Heteroannulation

Journal of the American Chemical Society, Год журнала: 2022, Номер 144(25), С. 11397 - 11404

Опубликована: Июнь 17, 2022

Design challenges in the development of circularly polarized luminescence (CPL) materials are focused on balancing dissymmetry factor (glum) and photoluminescence quantum yield (ΦPL) by regulating electric (μ) magnetic (m) transition dipole moment vectors. Aiming at designing efficient CPL emitters clarifying chiroptical variation mechanism, herein, we present a double π-helix based cyclooctatetraene-embedded perylene diimide dimer that combines chirality with molecular entanglement very high barriers for racemization. Through finely magnitudes μ m, maximal factors |gabs| |glum| can be boosted to 0.035 0.030, respectively, as revealed circular dichroism (CD) spectra. The results indicate 3-fold improvement g values modulated ΦPL from 1a, 4, 5 nitrogen heteroannulation bay region. brightness (BCPL) reaches recorded value up 573.4 M–1 cm–1, among highest chiral small molecules reported so far. This work has provided comprehensive insight into new class activities, further laying fundamentals optoelectronics.

Язык: Английский

---

Polymer‐Based Circularly Polarized Luminescent Materials

Advanced Optical Materials, Год журнала: 2023, Номер 11(6)

Опубликована: Янв. 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

Язык: Английский

---

Amplified Circularly Polarized Electroluminescence Behavior Triggered by Helical Nanofibers from Chiral Co‐assembly Polymers

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(23)

Опубликована: Март 23, 2022

Two chiral binaphthyl polymers (R/S-P1 and R/S-P2) with different dihedral angles of the moiety were chosen as inducers to construct co-assemblies an achiral pyrene-naphthalimide dye (NPy) then acted emitting layer (EML) circularly polarized electroluminescence (CP-EL) devices. The anchored angle R/S-P2 not only exhibited enhanced chirality signal, but also had a strong chirality-inducing effect on NPy in co-assembly (R/S-P2)0.6 -(NPy)0.4 . After annealing at 120 °C, CPL signal (|gem |) ordered helical nano-fibers was amplified 5.6×10-2 , which about 6-fold larger than that (R/S-P1)0.6 gem value due formation through π-π stacking interaction between NPy. This kind EML CP-OLEDs, achieved excellent CP-EL performance (|gEL |=4.8×10-2 ).

Язык: Английский

---