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Zhou M, Zhang J, Chen Y, Chen Z, Yuan Y, Gong Y, Zhang H. Clustering-Triggered Emission Liquid Crystalline Polymer Bearing Cholesterol: Tunable Circularly Polarized Luminescence and Room-Temperature Phosphorescence. Macromol Rapid Commun 2023; 44:e2300449. [PMID: 37792542 DOI: 10.1002/marc.202300449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 09/28/2023] [Indexed: 10/06/2023]
Abstract
Circularly polarized luminescence (CPL) materials with clustering-triggered emission (CTE) characteristic have gradually attracted attention for their unique photophysical properties. However, the majority of reported clusteroluminogens lack chirality and exhibit heterogeneity, making it challenging to achieve a well-defined helical structure necessary for efficient CPL with high dissymmetry factor (glum ). In this paper, chiral liquid crystals are constructed to obtain CTE-based CPL materials with high glum values. Side chain liquid crystal polymer PM6Chol bearing cholesterol clusteroluminogens are designed and synthesized. PM6Chol-coated film and PM6Chol thermal-treated film are also successfully prepared by different film-forming methods. Both the films inherit the CTE characteristic of cholesterol and show excitation wavelength-dependent luminescent behavior. However, the two polymer films exhibit different liquid crystal phase structures, with PM6Chol-coated film being a chiral bilayer smectic C phase and PM6Chol thermal-treated film being an achiral bilayer smectic A phase. Attributed to helical arrangement of cholesterol, PM6Chol-coated film emits efficient CPL with glum values up to 1.0 × 10-1 . For PM6Chol thermal-treated film, no CPL signal is detected due to the absence of helical structure. However, it shows obvious room-temperature phosphorescence with 2.0 s afterglow and 23.9 ms lifetime.
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Affiliation(s)
- Mengdie Zhou
- Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, Key Laboratory of Advanced Organic Functional Materials of Colleges and Universities of Hunan Province, College of Chemistry, Xiangtan University, Xiangtan, Hunan Province, 411105, China
| | - Jiafan Zhang
- Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, Key Laboratory of Advanced Organic Functional Materials of Colleges and Universities of Hunan Province, College of Chemistry, Xiangtan University, Xiangtan, Hunan Province, 411105, China
| | - Yueyue Chen
- Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, Key Laboratory of Advanced Organic Functional Materials of Colleges and Universities of Hunan Province, College of Chemistry, Xiangtan University, Xiangtan, Hunan Province, 411105, China
| | - Zhong Chen
- Instrumentation and Service Center for Molecular Sciences, Westlake University, 18 Shilongshan Road, Hangzhou, Zhejiang Province, 310024, China
| | - Yongjie Yuan
- Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, Key Laboratory of Advanced Organic Functional Materials of Colleges and Universities of Hunan Province, College of Chemistry, Xiangtan University, Xiangtan, Hunan Province, 411105, China
| | - Yongyang Gong
- Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering,Guilin University of Technology, No.12 Jian'gan Rd., Qixing District, Guilin, 541004, China
| | - Hailiang Zhang
- Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, Key Laboratory of Advanced Organic Functional Materials of Colleges and Universities of Hunan Province, College of Chemistry, Xiangtan University, Xiangtan, Hunan Province, 411105, China
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Zhang R, Ma H, Li X, Wang B, Li C, Liao W, Li Y, Han L. The simultaneous control over the alternating sequence and the inner-core position of the mesogenic segments in side-chain liquid crystal polymers. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Improved strength and water vapor permeability of polyacrylate/SiO2 nanocomposites: Molecular simulations and experimental analysis. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128236] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Orodepo GO, Gowd EB, Ramakrishnan S. Periodically Spaced Side-Chain Liquid Crystalline Polymers. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01888] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Gabriel Ogunsola Orodepo
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - E. Bhoje Gowd
- Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695019, India
| | - S. Ramakrishnan
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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