Helical columnar phase of mesogen-jacketed liquid crystal polymers for efficient circularly polarized luminescence

Liu, Zui; Deng, Fengyu; Fan, Chunyan; Yuan, Yongjie; Zhang, Hailiang

doi:10.1039/d4tc00498a

Cited by 3 publications

(2 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Combined with the phase structures and chiral photophysical properties of polymer samples, we can confirm that all copolymers formed a chiral helical columnar phase. The activation mechanism of circularly polarized luminescence properties in the copolymers DFM( x )-Chol( y ) is consistent with our previous report . An excessive or low content of chiral components is detrimental to the formation of the chiral helical columnar phase: A low content of chiral components cannot provide sufficient induction to enable the “sergeants” (chiral cholesterol side chains) to command large numbers of “soldiers” (achiral dibenzofuran chromophore side chains) to form a chiral structure.…”

Section: Resultssupporting

confidence: 90%

“…The activation mechanism of circularly polarized luminescence properties in the copolymers DFM(x)-Chol(y) is consistent with our previous report. 54 An excessive or low content of chiral components is detrimental to the formation of the chiral helical columnar phase: A low content of chiral components cannot provide sufficient induction to enable the "sergeants" (chiral cholesterol side chains) to command large numbers of "soldiers" (achiral dibenzofuran chromophore side chains) to form a chiral structure. In contrast, when there is an excessive content of chiral components, too many "sergeants" in the copolymer will disrupt the chiral helical structure due to their competitive relationship with each other.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and Properties of Mesogen-Jacketed Liquid Crystal Copolymers with Long-Lived Circularly Polarized Room-Temperature Phosphorescence

Liu,

Deng,

Huang

et al. 2024

ACS Appl. Polym. Mater.

Self Cite

View full text Add to dashboard Cite

Circularly polarized phosphorescence (CPP) materials, integrating the advantages of phosphorescence with circularly polarized luminescence, show wide applications in many fields. However, designing and preparing pure organic CPP materials remain challenging, as ensuring the stability of triplet excitons at room temperature while achieving chiral transfer from chiral structures to achiral chromophores is difficult. Herein, we propose a strategy to harness the structural features of mesogen-jacketed liquid crystal polymers (MJLCPs) for CPP material construction. A chiral monomer MJ0Chol and a phosphorescent monomer MJ0DFM are polymerized to prepare the homopolymers PMJ0Chol and PMJ0DFM and copolymers DFM(x)-Chol(y). The phosphorescence lifetime is effectively enhanced by the "jacketing" effect of MJLCPs, and the circularly polarized luminescence is activated through the construction of a chiral helical columnar phase. With the content of the MJ0DFM component increasing, the lifetime of copolymers gradually improves. Meanwhile, the |g lum | values of the samples exhibit an initial increase followed by a decrease with an increasing cholesterol content. DFM(0.6)-Chol(0.4) shows the highest g lum values for both fluorescence and phosphorescence, reaching −4.4 × 10 −3 and −7.1 × 10 −3 , respectively. Meanwhile, the phosphorescence lifetime can be achieved at 252 ms.

show abstract

Section: Resultssupporting

confidence: 90%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Synthesis and Properties of Mesogen-Jacketed Liquid Crystal Copolymers with Long-Lived Circularly Polarized Room-Temperature Phosphorescence

Liu,

Deng,

Huang

et al. 2024

ACS Appl. Polym. Mater.

Self Cite

View full text Add to dashboard Cite

show abstract

Tunable Helix Inversion and Circularly Polarized Luminescence in Cholesteric Liquid Crystal Copolymers with Room-Temperature Phosphorescence

Huang,

Wu,

Luo

et al. 2024

Macromolecules

View full text Add to dashboard Cite

Circularly polarized luminescence (CPL) polymer materials have received widespread attention due to their high stability and excellent processability. However, most of reported intrinsic CPL polymer materials show low luminescence dissymmetry factor (g lum ) values and are difficult to effectively regulate luminescent properties. This article proposes a simple strategy to synthesize luminescent cholesteric liquid crystal (N*-LC) copolymers Bi(x)-Mt(y)-Py(0.01) with large g lum values and tunable performance by copolymerizing nematic liquid crystal monomer MA4BiCN, chiral monomer MC0Mt, and luminescent monomer MC6Py. Regulation and inversion of chiral helix structure and CPL performance of copolymers are achieved by altering the relative content of chiral and liquid crystal components. Meanwhile, g lum values are further amplified and reversed through selective reflection. With an increase of chiral component, helix structures of Bi(x)-Mt(y)-Py(0.01) change from left-handed to right-handed, accompanied by reversal of CPL signal. For Bi(0.79)-Mt(0.20)-Py(0.01), solid-state fluorescence quantum yield can achieve 41.5%, and a negative CPL signal (g lum = −0.40) is detected in 10 μm film. When film thickness increases to 150 μm, the CPL signal is reversed to positive, attributed to enhanced selective reflection, and g lum is amplified to 0.66. Additionally, a red room-temperature phosphorescence with a 278.2 ms long lifetime is observed.

show abstract

A fluorinated chiral liquid with thermal robustness for inducing circularly polarized luminescence

Xiao,

Wang,

Zhang

et al. 2025

Chem. Commun.

View full text Add to dashboard Cite

show abstract

Helical columnar phase of mesogen-jacketed liquid crystal polymers for efficient circularly polarized luminescence

Abstract: Chiral luminescent liquid crystals show unique application values in preparation of circularly polarized luminescent (CPL) materials with large luminescence dissymmetry factor (glum) and have received widespread attention in recent years....

Cited by 3 publications

References 44 publications

Synthesis and Properties of Mesogen-Jacketed Liquid Crystal Copolymers with Long-Lived Circularly Polarized Room-Temperature Phosphorescence

Synthesis and Properties of Mesogen-Jacketed Liquid Crystal Copolymers with Long-Lived Circularly Polarized Room-Temperature Phosphorescence

Tunable Helix Inversion and Circularly Polarized Luminescence in Cholesteric Liquid Crystal Copolymers with Room-Temperature Phosphorescence

A fluorinated chiral liquid with thermal robustness for inducing circularly polarized luminescence

Contact Info

Product

Resources

About