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Ruan H, Jiang Q, Qiu Y, Zhang Y, Liao Y, Xie X. Balancing Compatibility and Gelability for High-Performance Cholesteric Liquid Crystalline Physical Gels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:771-779. [PMID: 36595360 DOI: 10.1021/acs.langmuir.2c02626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Liquid crystalline physical gels (LCPGs) have attracted increasing interest because of their mechanical properties and stimulus-response behaviors. However, due to their gelator properties such as thermal stability, gelation capability, and compatibility in liquid crystals, development of LCPGs with high performances still remains a huge challenging task. Herein, four novel gelators ((l)-PH, (d)-PH, (l)-P2H, and (d)-P2H) based on 1,4-benzenedicarboxamide phenylalanine derivatives containing one or two ethylene glycol groups have been designed and synthesized. It is found that the ethylene glycol group plays a significant role in improving the compatibility between the gelator and the liquid crystal. All of the prepared compounds can form stable LCPGs in P0616A. In particular, the storage modulus of LCPG with 9.0 wt % of (l)-PH with one ethylene glycol unit is higher than 106 Pa, which is similar to SmC gels and advantageous over previously reported nematic LCPGs. Furthermore, the prepared gels display a strong Cotton effect with hand-preferred twisted fiber networks and the self-assembled aggregates of (l)-PH can induce P0616A to form a cholesteric fingerprint structure. Thus, these low molecular weight gelators provide a strategy to construct high-performance cholesteric LCPGs for the realization of LC device applications.
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Affiliation(s)
- Huan Ruan
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan430074, China
| | - Qian Jiang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan430074, China
| | - Yuan Qiu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan430074, China
| | - Yuping Zhang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan430074, China
| | - Yonggui Liao
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan430074, China
- National Anti-Counterfeit Engineering Research Center, Huazhong University of Science and Technology, Wuhan430074, China
| | - Xiaolin Xie
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan430074, China
- National Anti-Counterfeit Engineering Research Center, Huazhong University of Science and Technology, Wuhan430074, China
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Shan T, Zheng K, Du Q, He H, Shi Y, Ma M, Chen S, Wang X. Facile regulation of the electro‐optical properties of liquid crystal gels by kinetics‐controlled hierarchy self‐assembly. POLYM INT 2021. [DOI: 10.1002/pi.6302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Tianyu Shan
- College of Materials Science and Engineering Zhejiang University of Technology Hangzhou China
| | - Kai Zheng
- College of Materials Science and Engineering Zhejiang University of Technology Hangzhou China
| | - Qinqing Du
- College of Materials Science and Engineering Zhejiang University of Technology Hangzhou China
| | - Huiwen He
- College of Materials Science and Engineering Zhejiang University of Technology Hangzhou China
| | - Yanqin Shi
- College of Materials Science and Engineering Zhejiang University of Technology Hangzhou China
| | - Meng Ma
- College of Materials Science and Engineering Zhejiang University of Technology Hangzhou China
| | - Si Chen
- College of Materials Science and Engineering Zhejiang University of Technology Hangzhou China
| | - Xu Wang
- College of Materials Science and Engineering Zhejiang University of Technology Hangzhou China
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Sasidharan AK, Mathew J, Achalkumar AS, Mathews M. Synthesis and Liquid Crystalline Properties of Low Molecular Weight Bis-Chalcone Compounds. Curr Org Synth 2021; 19:463-475. [PMID: 34620065 DOI: 10.2174/1570179418666211006144308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 08/03/2021] [Accepted: 08/16/2021] [Indexed: 11/22/2022]
Abstract
AIMS In this paper, we report on the synthesis and liquid crystalline properties of some low molecular weight bis-chalcone compounds derived from acetone, cyclopentanone and cyclohexanone mesogenic cores. BACKGROUND Structurally bis-chalcones belong to a broader family of chalcone compounds. Chalcone is a compound that consists of two aromatic rings linked by an unsaturated α, β-ketone. OBJECTIVE Liquid crystalline chalcones are prepared by aliphatic chain substituents on two aromatic rings. Chalcones are well studied for their mesomorphic properties. Compared to a large number of chalcone based LCs reported, only a few articles have been published on the mesomorphic properties of bis-chalcone compounds. The target compounds of the present study varied not only in their central core but also in number and position of terminal aliphatic chain substitution-a key structural unit in deciding the liquid crystalline properties of a compound. METHOD All target compounds were synthesized in good yield by base catalyzed Claisen-Schmidt condensation reaction. Molecular structures were confirmed by FT-IR, 1H NMR, 13C NMR, and mass spectroscopic methods. Liquid crystalline property of these compounds was evaluated using polarizing optical microscopy and differential scanning calorimetry. RESULTS Although none of the acetone based compounds exhibited mesomorphism, cyclopentanone and cyclohexanone based compounds with octyloxy chain at para position on either side of the dibenzylidine ring stabilized liquid crystalline smectic (SmA and SmC) and nematic (N) phases. The observed structure-liquid crystalline property relationship was explained by structural analysis of molecules using DFT calculations. Considering the inherent photoluminescence nature of the chalcone moiety, a preliminary study was carried out on a selected compound to reveal its fluorescence property. CONCLUSION Our study brings about an important structure-liquid crystalline property relationship in a relatively unexplored class of bis-chalcone liquid crystals.
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Affiliation(s)
- Anju K Sasidharan
- Department of Chemistry, St. Joseph's College (Autonomous), Devagiri, Kozhikode-673008, Affiliated to University of Calicut, Kerala. India
| | - Jomon Mathew
- Department of Chemistry, St. Joseph's College (Autonomous), Devagiri, Kozhikode-673008, Affiliated to University of Calicut, Kerala. India
| | - Ammathnadu S Achalkumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam. India
| | - Manoj Mathews
- Department of Chemistry, St. Joseph's College (Autonomous), Devagiri, Kozhikode-673008, Affiliated to University of Calicut, Kerala. India
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Xu Y, Atrens AD, Stokes JR. Liquid crystal hydroglass formed via phase separation of nanocellulose colloidal rods. SOFT MATTER 2019; 15:1716-1720. [PMID: 30638248 DOI: 10.1039/c8sm02288g] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A new anisotropic soft material - a liquid crystal 'hydroglass' (LCH) - is created from aqueous suspensions of nanocrystalline cellulose (NCC) colloidal rods. Under specific conditions, the NCC suspension separates into a colloid-rich attractive glass matrix phase and a coexisting liquid crystal phase. LCH provides similar viscoelastic properties to polymer and colloidal gels, but permits reversibly-orientating the colloidal rods through shear forces.
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Affiliation(s)
- Yuan Xu
- School of Chemical Engineering, The University of Queensland, Brisbane, 4072, Australia.
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Li Y, Zhao J, Chen L, Yuan Y, Zhang H. Effect of molecular weight of side chain liquid crystalline polymers on properties of liquid crystal physical gels. REACT FUNCT POLYM 2019. [DOI: 10.1016/j.reactfunctpolym.2018.10.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Ruan H, Chen G, Zhao X, Wang Y, Liao Y, Peng H, Feng CL, Xie X, Smalyukh II. Chirality-Enabled Liquid Crystalline Physical Gels with High Modulus but Low Driving Voltage. ACS APPLIED MATERIALS & INTERFACES 2018; 10:43184-43191. [PMID: 30421604 DOI: 10.1021/acsami.8b14488] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Self-supporting liquid crystalline physical gels with facile electro-optic response are highly desirable, but their development is challenging because both the storage modulus and driving voltage increase simultaneously with gelator loading. Herein, we report liquid crystalline physical gels with high modulus but low driving voltage. This behavior is enabled by chirality transfer from the molecular level to three-dimensional fibrous networks during the self-assembly of 1,4-benzenedicarboxamide phenylalanine derivatives. Interestingly, the critical gel concentration is as low as 0.1 wt %. Our findings open doors to understanding and exploiting the role of chirality in organic gels.
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Affiliation(s)
- Huan Ruan
- Key Lab for Material Chemistry of Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology (HUST) , Wuhan 430074 , China
| | - Guannan Chen
- Key Lab for Material Chemistry of Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology (HUST) , Wuhan 430074 , China
| | - Xiaoyu Zhao
- Key Lab for Material Chemistry of Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology (HUST) , Wuhan 430074 , China
| | - Yong Wang
- Key Lab for Material Chemistry of Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology (HUST) , Wuhan 430074 , China
| | - Yonggui Liao
- Key Lab for Material Chemistry of Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology (HUST) , Wuhan 430074 , China
| | - Haiyan Peng
- Key Lab for Material Chemistry of Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology (HUST) , Wuhan 430074 , China
| | - Chuan-Liang Feng
- School of Materials Science and Engineering , Shanghai Jiaotong University , Shanghai 200240 , China
| | - Xiaolin Xie
- Key Lab for Material Chemistry of Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology (HUST) , Wuhan 430074 , China
| | - Ivan I Smalyukh
- Department of Physics and Materials Science and Engineering Program , University of Colorado at Boulder (CUB) , Boulder , Colorado 80309 , United States
- Sino-US Joint Research Center on Liquid Crystal Chemistry and Physics, HUST and CUB , Wuhan 430074 , China
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Electro-optical property and stability of liquid crystal physical gels controlled by copolymerization. REACT FUNCT POLYM 2018. [DOI: 10.1016/j.reactfunctpolym.2018.07.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Zhao J, Yuan Y, Chen L, Li Y, Zhang H. High performance liquid crystalline physical gels prepared by side chain liquid crystalline polymers. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.04.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Zhao D, Ouyang D, Jiang M, Liao Y, Peng H, Xie X. Photomodulated Electro-optical Response in Self-Supporting Liquid Crystalline Physical Gels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:7519-7526. [PMID: 29852741 DOI: 10.1021/acs.langmuir.8b01031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Photoresponsive liquid crystal (LC) physical gels have attracted more and more attention because of the nature of strong response via light stimulus. Although many efforts on the breaking and recovering of physical gels through photoisomerization have been focused, fast electro-optical response and high mechanical properties even upon light irradiations are difficult to achieve at the same time. In this work, two kinds of azobenzene-containing gelators (AG1 and AG2) with different terminal groups were designed and synthesized. Both gelators could induce the nematic LC P0616A self-assemble into anisotropic phase-separated LC physical gels at low contents. Their phase-transition behavior, thermal stability, microstructure, and mechanical strength were systematically studied. Compared with AG2 in P0616A, the P0616A/AG1 gels showed better mechanical property. When the gelator content was above 3 wt %, the P0616A/AG1 gels possessed good self-supporting ability with a storage modulus more than 104 Pa. Thus, the photoresponsive electro-optical properties and structures of P0616A/AG1 gels were focused in detail. It was surprising that the electro-optical response speed of the P0616A/AG1 gels could be promoted upon UV irradiation. In particular, the decay time (τoff) was only about half when compared with the initial state, whereas the gels still exhibited good self-supporting ability; also the network of the LC physical gels had no change at macro- and microstructural levels. These exciting results would open a door for the application of this material in electro-optical devices.
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Panda MR, Koley S, Mishra K, Ghosh S. Probing of Reorganization Dynamics within the Different Phases of Themotropic Liquid Crystals. ChemistrySelect 2018. [DOI: 10.1002/slct.201702944] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Manas Ranjan Panda
- School of Chemical Sciences; National Institute of Science Education and Research, HBNI; Khurda - 752050, Odisha India
| | - Somnath Koley
- School of Chemical Sciences; National Institute of Science Education and Research, HBNI; Khurda - 752050, Odisha India
| | - Krishna Mishra
- School of Chemical Sciences; National Institute of Science Education and Research, HBNI; Khurda - 752050, Odisha India
| | - Subhadip Ghosh
- School of Chemical Sciences; National Institute of Science Education and Research, HBNI; Khurda - 752050, Odisha India
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Choi YJ, Yoon WJ, Kim DY, Park M, Lee Y, Jung D, Kim JS, Yu YT, Lee CR, Jeong KU. Stimuli-responsive liquid crystal physical gels based on the hierarchical superstructures of benzene-1,3,5-tricarboxamide macrogelators. Polym Chem 2017. [DOI: 10.1039/c7py00134g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stimuli-responsive liquid crystal physical gels (LCPGs) were fabricated by using the hierarchical superstructures of benzene-1,3,5-tricarboxamide macrogelators in a host nematic LC medium.
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Affiliation(s)
- Yu-Jin Choi
- BK21 Plus Haptic Polymer Composite Research Team & Department of Polymer-Nano Science and Technology Chonbuk National University
- Jeonju 54896
- Republic of Korea
| | - Won-Jin Yoon
- BK21 Plus Haptic Polymer Composite Research Team & Department of Polymer-Nano Science and Technology Chonbuk National University
- Jeonju 54896
- Republic of Korea
| | - Dae-Yoon Kim
- BK21 Plus Haptic Polymer Composite Research Team & Department of Polymer-Nano Science and Technology Chonbuk National University
- Jeonju 54896
- Republic of Korea
| | - Minwook Park
- BK21 Plus Haptic Polymer Composite Research Team & Department of Polymer-Nano Science and Technology Chonbuk National University
- Jeonju 54896
- Republic of Korea
| | - Yumin Lee
- BK21 Plus Haptic Polymer Composite Research Team & Department of Polymer-Nano Science and Technology Chonbuk National University
- Jeonju 54896
- Republic of Korea
| | - Daseal Jung
- BK21 Plus Haptic Polymer Composite Research Team & Department of Polymer-Nano Science and Technology Chonbuk National University
- Jeonju 54896
- Republic of Korea
| | - Jin-Soo Kim
- Division of Advanced Materials Engineering
- Chonbuk National University
- Jeonju 54896
- Republic of Korea
| | - Yeon-Tae Yu
- Division of Advanced Materials Engineering
- Chonbuk National University
- Jeonju 54896
- Republic of Korea
| | - Cheul-Ro Lee
- Division of Advanced Materials Engineering
- Chonbuk National University
- Jeonju 54896
- Republic of Korea
| | - Kwang-Un Jeong
- BK21 Plus Haptic Polymer Composite Research Team & Department of Polymer-Nano Science and Technology Chonbuk National University
- Jeonju 54896
- Republic of Korea
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