Tuning the circularly polarized luminescence of polymer-stabilized cholesteric liquid crystal films using chiral dopants

Lü, Xiaohui; Zhou, Ziqing; Ni, Baining; Li, Hongkun; Li, Yang; Li, baozong; Liu, Wei; Wang, Yong; Yang, Yonggang

doi:10.1039/d2tc00326k

Cited by 17 publications

(7 citation statements)

References 81 publications

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“…15 We have prepared a series of PSCLC films by adding tetraphenylethylene (TPE)-based fluorescent molecules into CLCs, and in situ photopolymerisation subsequently. 16 High g lum values (| g lum | of up to 0.61) of the CPL-active materials were induced by the long-range ordered supramolecular helical structures of PSCLCs. Moreover, the CPL-active organic–inorganic hybrid silica films embedded with a TPE derivative were prepared.…”

Section: Introductionmentioning

confidence: 99%

Reflection-influenced circularly polarised luminescence in dye-embedded polymer-stabilised cholesteric liquid crystal films

Lian

Liu

et al. 2023

J. Mater. Chem. C

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Section: Introductionmentioning

confidence: 99%

Reflection-influenced circularly polarised luminescence in dye-embedded polymer-stabilised cholesteric liquid crystal films

Lian

Liu

et al. 2023

J. Mater. Chem. C

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“…Since the reflectance of these films was low in the range of the emission band, the emitted CPL could be attributed to the contribution of the chiral induction of CLCN structures. 50,51 When the concentration of R5011 was 1.8 wt %, the emission band partially overlapped with the reflection band, and a g lum value of −0.60 was achieved (Figure 3c). As the reflection band shifted far away from the main emission band, small |g lum | values were obtained.…”

Section: Free-standing Clcn Filmsmentioning

confidence: 99%

“…We previously successfully synthesized several fluorescent dyes and embedded them into CLC mixtures. − After polymerization, emissive CLC polymer networks (CLCNs) with vivid structural colors were obtained. Very recently, composite films were built by stacking a fluorescent layer and a CLCN layer. , It was demonstrated that CLCN films with high reflectance could serve as chiral optical filters, and the composite film emitted CPL with a large | g lum | value up to 1.63 .…”

Section: Introductionmentioning

confidence: 99%

Circularly Polarized Luminescence of Cholesteric Liquid Crystal Polymer Networks with a Europium(III) Complex as an Emitter

Xu,

Shi,

Zhao

et al. 2024

ACS Appl. Mater. Interfaces

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A coordination complex, Eu(C 12 C 12 dbm) 3 (phen), with strong emission and a high quantum yield (QY ∼ 51.9%) was synthesized. The Eu III complex, as a fluorescent emitter, was embedded in cholesteric liquid crystal polymer networks (CLCNs). A series of free-standing Eu III -CLCN films were obtained, generating a typical sharp emission band corresponding to the Eu III complex. Tunable handedness of circularly polarized luminescence (CPL) with high |g lum | values (up to 0.63) was observed. A series of CPL-active CLCN-coated PET films were also prepared (|g lum | values up to 0.63), which can be used for largearea preparations. Moreover, by stacking an emitter-embedded PMMA layer and a CLCN layer, a composite system was built, and a large |g lum | value (∼1.42) was achieved. Fluorescence patterns were prepared, and distinct images of CLCN films were recognized under both daylight and UV light. This work not only demonstrated that coordination compounds could be incorporated with CLCN films to prepare CPL-active materials with high |g lum | values but also provided a new perspective for emissive CLCN materials used for anticounterfeiting and encryption.

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“…In another study, Lu et al prepared a kind of AIE and mechanofluochromism-active triad dye, which was applied for latent fingerprint visualization. [219] The polymer-stabilized cholesteric liquid crystals films were obtained by adding the dyes to cholesteric liquid crystal matrix for photopolymerization. The resulting films exhibited tunable CPL with g lum values of up to 0.61.…”

Section: Chiral Component and Luminescent Component: Non-covalent Int...mentioning

confidence: 99%

Polymer‐Based Circularly Polarized Luminescent Materials

Zhong

Zhao

Deng

2023

Advanced Optical Materials

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

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Tuning the circularly polarized luminescence of polymer-stabilized cholesteric liquid crystal films using chiral dopants

Cited by 17 publications

References 81 publications

Reflection-influenced circularly polarised luminescence in dye-embedded polymer-stabilised cholesteric liquid crystal films

Reflection-influenced circularly polarised luminescence in dye-embedded polymer-stabilised cholesteric liquid crystal films

Circularly Polarized Luminescence of Cholesteric Liquid Crystal Polymer Networks with a Europium(III) Complex as an Emitter

Polymer‐Based Circularly Polarized Luminescent Materials

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