White‐Light Emission and Circularly Polarized Luminescence from a Chiral Copper(I) Coordination Polymer through Symmetry‐Breaking Crystallization

Yu, Muxin; Liu, Caiping; Zhao, Yunfang; Li, Shengchang; Yu, Yunlong; Lv, Jiangquan; Chen, Lian; Jiang, Feilong; Hong, Maochun

doi:10.1002/ange.202201590

Cited by 6 publications

(2 citation statements)

References 78 publications

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“…4d). 23 Combined with the photochromism discussed above, an interesting phenomenon can be observed. Under the intense irradiation of a high power Xe lamp, 1 shows photochromism through an electron transfer process from chlorine atoms to ND molecules.…”

Section: Dalton Transactions Papermentioning

confidence: 90%

Photochromism and single-component white light emission from a metalloviologen complex based on 1,5-naphthyridine

Zhang,

et al. 2024

Dalton Trans.

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Section: Dalton Transactions Papermentioning

confidence: 90%

Photochromism and single-component white light emission from a metalloviologen complex based on 1,5-naphthyridine

Zhang,

et al. 2024

Dalton Trans.

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“…48 Although symmetry breaking can elegantly explain some common physical property changes at different states, its application in unveiling the optical changes of luminescent 6 materials at different state are scarcely deeply explored except chirality. 49,50 Therefore, aggregation-induced symmetry breaking (AISB) may have the potential to account for the variations between single molecular state and aggregate state. To get an insight into AISB, a series of closed-form rhodamine-based AIE luminogens (AIEgens) were introduced into this work.…”

Section: Introductionmentioning

confidence: 99%

Understanding the AIE phenomenon of nonconjugated rhodamine derivatives through a new viewpoint of symmetry breaking

Yang

Wang

Zhang

et al. 2023

Preprint

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Solid-state emissive materials are of great importance due to their wide applications in the field of bioimaging and optoelectronic devices. The concept of aggregation-induced emission (AIE) provides a reliable strategy to afford solid-state emissive luminogens with the guidance of restriction of intramolecular motion (RIM) mechanism. Traditional AIE luminogens (AIEgens) exhibit enhanced emission intensity under increased viscosity or decreased temperature, attributed to the RIM mechanism. However, some luminogens were found without the classic viscosity or temperature effect, but still display AIE feature. In this work, we synthesized a series of cross-shaped and closed-form rhodamine-based unorthodox AIEgens. Their abnormal emission behavior in increased viscosity and cooling experiments suggested that their strong solid-state luminescence (up to 72.7%) was not ascribed to the conventional RIM working mechanism. Through a systematical investigation including single-crystal structural analysis, optical property study and theoretical calculations, we proposed that aggregation-induced symmetry breaking (AISB) may induce intramolecular charge transfer and act as a general principle to dominate the unique aggregate-state emission behavior of the nonconjugated rhodamine derivatives. More importantly, AISB not only provides a feasible approach for the design of unique rhodamine-based AIEgens, but also helps us deeply understand the change of luminescent behavior of materials upon aggregation with a wide perspective.

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Circularly Polarized Laser Emission from Homochiral Superstructures based on Achiral Molecules with Conformal Flexibility

Liu

Ren

et al. 2022

Angewandte Chemie

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Without external chiral intervention, it is a challenge to form homochirality from achiral molecules with conformational flexibility. We here report on a rational strategy that uses multivalent noncovalent interactions to clamp the molecular conformations of achiral D-A molecules. These interactions overcome the otherwise dominant dipole-dipole interactions and thus disfavor their symmetric antiparallel stacking. It in turn facilitates parallel packing, leading to spontaneous symmetry breaking during crystallization and thus the formation of homochiral conglomerates. When this emergent homochirality is coupled with optical gain characteristics of the molecules, the homochiral crystals are explored as excellent circularly polarized microlasers with low lasing threshold (16.4 μJ cm À 2 ) and high dissymmetry factor g lum (0.9). This study therefore provides a facile design strategy for supramolecular chiral materials and active laser ones without the necessity of intrinsic chiral element.

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White‐Light Emission and Circularly Polarized Luminescence from a Chiral Copper(I) Coordination Polymer through Symmetry‐Breaking Crystallization

Abstract: Figure 5. CPL spectra of 1-M and 1-P in a) powder state and b) singlecrystal state upon excitation at 350 nm.

Cited by 6 publications

References 78 publications

Photochromism and single-component white light emission from a metalloviologen complex based on 1,5-naphthyridine

Photochromism and single-component white light emission from a metalloviologen complex based on 1,5-naphthyridine

Understanding the AIE phenomenon of nonconjugated rhodamine derivatives through a new viewpoint of symmetry breaking

Circularly Polarized Laser Emission from Homochiral Superstructures based on Achiral Molecules with Conformal Flexibility

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