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Liu T, Miao L, Yao F, Zhang W, Zhao W, Yang D, Feng Q, Hu D. Structure, Properties, Preparation, and Application of Layered Titanates. Inorg Chem 2024; 63:1-26. [PMID: 38109856 DOI: 10.1021/acs.inorgchem.3c03075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
As a typical cation-exchangeable layered compound, layered titanate has a unique open layered structure. Its excellent physical and chemical properties allow its wide use in the energy, environmental protection, electronics, biology, and other fields. This paper reviews the recent progress in the research on the structure, synthesis, properties, and application of layered titanates. Various reactivities, as well as the advantages and disadvantages, of different synthetic methods are discussed. The reaction mechanism and influencing factors of the ion exchange reaction, intercalation reaction, and exfoliation reaction are analyzed. The latest research progress on layered titanates and their modified products in the fields of photocatalysis, adsorption, electrochemistry, and other applications is summarized. Finally, the future development of layered titanate and its exfoliated product two-dimensional nanosheets is proposed.
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Affiliation(s)
- Tian Liu
- Faculty of Chemistry and Chemical Engineering, Engineering Research Center of Advanced Ferroelectric Functional Materials, Key Laboratory of Functional Materials of Baoji, Baoji University of Arts and Sciences, 1 Hi-Tech Avenue, Baoji, Shaanxi 721013, China
| | - Lei Miao
- Lab of Environmental Inorganic Materials Chemistry, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-Ku, Sendai 980-8577, Japan
| | - Fangyi Yao
- Department of Advanced Materials Science, Faculty of Engineering and Design, Kagawa University, 2217-20 Hayashi-cho, Takamatsu 761-0396, Japan
| | - Wenxiong Zhang
- Institute for Solid State Physics (ISSP), The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 227-8581, Japan
| | - Weixing Zhao
- Faculty of Chemistry and Chemical Engineering, Engineering Research Center of Advanced Ferroelectric Functional Materials, Key Laboratory of Functional Materials of Baoji, Baoji University of Arts and Sciences, 1 Hi-Tech Avenue, Baoji, Shaanxi 721013, China
| | - Desuo Yang
- Faculty of Chemistry and Chemical Engineering, Engineering Research Center of Advanced Ferroelectric Functional Materials, Key Laboratory of Functional Materials of Baoji, Baoji University of Arts and Sciences, 1 Hi-Tech Avenue, Baoji, Shaanxi 721013, China
| | - Qi Feng
- Department of Advanced Materials Science, Faculty of Engineering and Design, Kagawa University, 2217-20 Hayashi-cho, Takamatsu 761-0396, Japan
| | - Dengwei Hu
- Faculty of Chemistry and Chemical Engineering, Engineering Research Center of Advanced Ferroelectric Functional Materials, Key Laboratory of Functional Materials of Baoji, Baoji University of Arts and Sciences, 1 Hi-Tech Avenue, Baoji, Shaanxi 721013, China
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Wei W, Xiong H. Liquid-Crystalline Polymers: Molecular Engineering, Hierarchical Structures, and Applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:11514-11520. [PMID: 36103648 DOI: 10.1021/acs.langmuir.2c01768] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Liquid-crystalline polymers (LCPs) are a unique class of soft materials that combine liquid crystal and polymer characteristics. This perspective highlights recent advances of LCPs on the aspects of molecular engineering, hierarchical structures, and emerging applications. The strategy of sequence control in polymer synthesis has been introduced to tailor the primary structures of LCPs as well as their phases and orders. By incorporating mesogenic motifs rich in shape, order, and interaction into LCPs, novel bulk and interfacial structures on hierarchical scales are anticipated. The intrinsic features and fascinating properties of LCPs enable them to find potential applications in emerging areas including integrated circuits, lasing, environment, and energy, implying compelling opportunities for LCPs in fundamental science and transformative technologies.
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Wei W, Farooq MA, Xiong H. Cholesteric Liquid Crystalline Polyether with Broad Tunable Circularly Polarized Luminescence. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:11922-11930. [PMID: 34601879 DOI: 10.1021/acs.langmuir.1c02144] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Strong circularly polarized luminescence (CPL) with high purity and broad tunability was achieved in a new type of polyether-based cholesteric liquid crystalline (CLC) copolymers comprising chiral cholesteryl, nematic mesogens, and cross-linkable moieties. The phase boundary diagram of the copolymers was constructed, wherein the CLC phase in a wide composition and temperature window down to room temperature was achieved. Furthermore, reflection colors across the infrared and visible light regions can be continuously tuned by altering composition or temperature, which can be further fixed in the flexible CLC elastomer by photo-cross-linking. Introducing achiral dyes in the CLC thin films can generate strong CPL with distinct handedness and high dissymmetry factors (glum). Particularly, the left-handed full-color CPL is obtained by selective circularly polarized scattering in the spectral region outside the band gap of the CLC thin film, and the right-handed CPL with glum up to -1.05 is achieved within the band gap of the CLC thin film following the selective circularly polarized reflection mechanism. This type of CPL active material is expected to have potential applications in liquid crystal display and photonics.
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Affiliation(s)
- Wei Wei
- Department of Polymer Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Muhammad Amjad Farooq
- Department of Polymer Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Huiming Xiong
- Department of Polymer Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
- Center for Soft Matter and Interdisciplinary Sciences, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
- Sichuan Research Institute, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
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Lee C, Osuji CO. 100th Anniversary of Macromolecular Science Viewpoint: Opportunities for Liquid Crystal Polymers in Nanopatterning and Beyond. ACS Macro Lett 2021; 10:945-957. [PMID: 35549196 DOI: 10.1021/acsmacrolett.1c00350] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Liquid-crystal polymers (LCPs) integrate at a molecular level the characteristics of two important material classes, i.e., liquid crystals (LCs) and polymers. As a result, they exhibit a wide variety of intriguing physical phenomena and have useful properties in various settings. In the nearly 50 years since the discovery of the first melt-processable LCPs, there has been a remarkable expansion in the field encompassing the development of new chain architectures, the incorporation of new classes of mesogens, and the exploration of new properties and applications. As engineering materials, LCPs are historically best known in the context of high strength fibers. In a more contemporary study, the pairing of LC mesophase assembly with block copolymer (BCP) self-assembly in LC BCPs has resulted in a fascinating interplay of ordering phenomena and rich phase behavior, while lightly cross-linked networks, LC elastomers, are extensively investigated as shape memory materials based on their thermomechanical actuation. As this Viewpoint describes, these and other examples are active areas of research in which new, compelling opportunities for LCPs are emerging. We highlight a few selected areas that we view as being potentially significant in the near future, with a particular emphasis on nanopatterning. Here, the ability to readily access small feature sizes, the fluidity of the LC mesophase, and LC-based handles for achieving orientation control present a compelling combination. Opportunities for LCPs are also presented under the broad rubric of "beyond nanopatterning", and we discuss relevant challenges and potential new directions in the field.
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Affiliation(s)
- Changyeon Lee
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Chinedum O. Osuji
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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Lee C, Ndaya D, Bosire R, Gabinet UR, Sun J, Gopalan P, Kasi RM, Osuji CO. Effects of Labile Mesogens on the Morphology of Liquid Crystalline Block Copolymers in Thin Films. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Changyeon Lee
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Dennis Ndaya
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
- Polymer Program, Institute of Material Science, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Reuben Bosire
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
- Polymer Program, Institute of Material Science, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Uri R. Gabinet
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Jian Sun
- Department of Materials Science and Engineering, University of Wisconsin, Madison Wisconsin 53706, United States
| | - Padma Gopalan
- Department of Materials Science and Engineering, University of Wisconsin, Madison Wisconsin 53706, United States
| | - Rajeswari M. Kasi
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
- Polymer Program, Institute of Material Science, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Chinedum O. Osuji
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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Matsunaga K, Kukai W, Ishizaki M, Kurihara M, Yamamoto S, Mitsuishi M, Yabu H, Nagano S, Matsui J. Formation of Perpendicularly Aligned Sub-10 nm Nanocylinders in Poly( N-dodecylacrylamide- b-ethylene glycol) Block Copolymer Films by Hierarchical Phase Separation. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00838] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
| | | | | | | | | | | | | | - Shusaku Nagano
- Nagoya University Venture Business Laboratory, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
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Dong L, Chandra A, Wylie K, Nakatani R, Nabae Y, Hayakawa T. The Role of Liquid Crystalline Side Chains for Long-range Ordering in the Block Copolymer Thin Films. J PHOTOPOLYM SCI TEC 2020. [DOI: 10.2494/photopolymer.33.529] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lei Dong
- Department of Materials Science and Engineering, Tokyo Institute of Technology
| | - Alvin Chandra
- Department of Materials Science and Engineering, Tokyo Institute of Technology
| | - Kevin Wylie
- Department of Materials Science and Engineering, Tokyo Institute of Technology
| | - Ryuichi Nakatani
- Department of Materials Science and Engineering, Tokyo Institute of Technology
| | - Yuta Nabae
- Department of Materials Science and Engineering, Tokyo Institute of Technology
| | - Teruaki Hayakawa
- Department of Materials Science and Engineering, Tokyo Institute of Technology
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Tao K, Yang J, Zhao J. The experimental evidence of multi-step δ-relaxation mode in liquid crystalline side chain polymers by time-resolved fluorescence emission spectroscopy. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Design and phase transition behavior of siloxane-based monomeric and dimeric liquid crystals bearing cholesteryl mesogenic groups. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.02.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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