Enhanced Circularly Polarized Luminescence from Reorganized Chiral Emitters on the Skeleton of a Zeolitic Imidazolate Framework

Zhao, Tonghan; Han, Jianlei; Liu, Yan; Liu, Minghua; Duan, Pengfei

doi:10.1002/ange.201900052

Cited by 40 publications

(9 citation statements)

References 69 publications

(26 reference statements)

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“…As shown in Fig. 5a , the enhanced CPL has been realized by reorganizing chiral binaphthyl-derived emitters 44 onto the achiral zeolitic imidazolate framework (ZIF-8) 77 . Although the chirality inversion occurred owing to the change of dihedral angle in the axially chiral ligands, the | g lum | of chiral emitters exhibited significant amplification (from 10 −4 to 10 −3 ) due to the well-ordered arrangement of chiral emitters on the skeleton of ZIF-8.…”

Section: Cpl-active Organic Materials With Micro-/nano-structuresmentioning

confidence: 99%

Circularly polarized luminescence from organic micro-/nano-structures

et al. 2021

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Circularly 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.

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Section: Cpl-active Organic Materials With Micro-/nano-structuresmentioning

confidence: 99%

Circularly polarized luminescence from organic micro-/nano-structures

et al. 2021

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“…Since solid materials are employed extensively in fields ranging from military to everyday life, scalespan molecular self-assembly is highly desirable for the achievement of solid supramolecular materials. However, so far, except for various hydrogel, [7][8][9][10][11] Layer-by-Layer (LBL) films, 12,13 casting-films, 14 or polymeric composite materials, [15][16][17] few molecular self-assembly could lead to other scale-span bulk solid structures. 18,19 In contrast, nature is very good at creating scale-span behaviors.…”

Section: Introductionmentioning

confidence: 99%

Pressing-Induced Caking: A General Strategy to Scale-Span Molecular Self-Assembly

et al. 2020

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General strategies leading to scale-span molecular self-assembly are of crucial importance in creating bulk supramolecular materials. Here, we report that under mechanical pressure, caking of the precipitated molecular self-assemblies led to bulk supramolecular films. Massive fabrication of supramolecular films became possible by employing a simple household noodle machine. The film could be endowed to acquire diversified functions by depositing various functional ingredients via coprecipitation. We expect that our current work opens up a new paradigm leading to large-scale functional solid molecular self-assembled materials.

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“…The calculated g lum value of ≈31.05 × 10 −2 is higher than the recently reported chiral-MOFs. [41][42][43][44] The CPL of MOFs is frequently achieved by including chiral ligands as guests or on the surface of the MOFs. [41,45] To further check the purity of CPL, a quarter-wave plate is used to convert the circular polarization to linear polarization, and a linear polarizer is placed in front of the spectrometer.…”

Section: Resultsmentioning

confidence: 99%

Solution‐Processed and Room‐Temperature Spin Light‐Emitting Diode Based on Quantum Dots/Chiral Metal‐Organic Framework Heterostructure

Mustaqeem

Chou

Kamal

et al. 2023

Adv Funct Materials

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Spin optoelectronics is an indispensable key for the future development of spintronics. In conventional spin light emitting diodes (LEDs), spin‐polarized carrier pairs are injected electrically into the light emitting layer and create circularly polarized light (CPL). Generally, spin‐polarized carriers are accomplished using ferromagnetic contacts or applying an external magnetic field, which will produce several drawbacks, including low temperature operation, low spin‐polarized carriers injection efficiency, etc. To circumvent the existing shortcomings, here, an alternative approach is proposed and achieves spin‐polarized LEDs at room temperature based on quantum dots (QDs)/chiral metal‐organic framework heterojunction without using ferromagnetic contacts or magnetic fields. The spin‐polarized injected layer composed of self‐assembled monolayer (SAM)/Chiral‐MOF ([Sr(9,10‐adc)(DMAc)2]n)) film, which produces spin‐polarized holes with spin orientation, determining the polarization and strength of circularly polarized electroluminescence (CP‐EL). The spin‐QLED emits CP‐EL at a rate of 12.24% efficiency, which provides an excellent alternative to generate new functionality for conventional QLEDs. The approach is anticipated to be very useful, enabling to offer a general methodology for generating not yet realized spin optoelectronic devices.

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Enhanced Circularly Polarized Luminescence from Reorganized Chiral Emitters on the Skeleton of a Zeolitic Imidazolate Framework

Abstract: Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

Cited by 40 publications

References 69 publications

Circularly polarized luminescence from organic micro-/nano-structures

Circularly polarized luminescence from organic micro-/nano-structures

Pressing-Induced Caking: A General Strategy to Scale-Span Molecular Self-Assembly

Solution‐Processed and Room‐Temperature Spin Light‐Emitting Diode Based on Quantum Dots/Chiral Metal‐Organic Framework Heterostructure

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