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Rim M, Kang DG, Kim W, Jang J, Oh M, Wi Y, Park S, Tran DT, Ha M, Jeong KU. Encryptable Electrochromic Smart Windows: Uniaxially Oriented and Polymerized Hierarchical Nanostructures Constructed by Self-Assembly of Tetrathiafulvalene-Based Reactive Mesogens. ACS NANO 2023. [PMID: 37486215 DOI: 10.1021/acsnano.3c02777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
Tetrathiafulvalene (TTF)-based reactive mesogens (TTF-E and TTF-T) are synthesized, self-assembled, uniaxially oriented, and polymerized for the development of encryptable electrochromic smart windows. Electrochemical and spectroscopic experiments prove that the self-assembled TTF mixture (TTFM, TTF-E:TTF-T = 1:1) can reversibly switch the absorption wavelength of the TTF chromophore according to the redox reactions. Based on the identification of the phase transition and crystallographic structure, uniaxially oriented hierarchical nanostructures are easily constructed on the macroscopic area by simple coating and a self-assembly process. Subsequent polymerization of hierarchical nanostructures of TTFM significantly enhances thermal and mechanical stabilities and makes it possible for them to be fabricated as an electrochromic device. The angularly dependent correlation between the anisotropy of mesogens and the linearly polarized light allow us to demonstrate TTFM as smart windows capable of various optical security applications, including privacy protection and information encryption.
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Affiliation(s)
- Minwoo Rim
- Department of Polymer-Nano Science and Technology, Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Dong-Gue Kang
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Woojin Kim
- Department of Polymer-Nano Science and Technology, Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Junhwa Jang
- Department of Polymer-Nano Science and Technology, Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Mintaek Oh
- Department of Polymer-Nano Science and Technology, Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Youngjae Wi
- Department of Polymer-Nano Science and Technology, Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Sungjune Park
- Department of Polymer-Nano Science and Technology, Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Duy Thanh Tran
- Department of Polymer-Nano Science and Technology, Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Minjeong Ha
- Department of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Kwang-Un Jeong
- Department of Polymer-Nano Science and Technology, Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
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Deberdeev TR, Akhmetshina AI, Karimova LK, Ignat’eva EK, Deberdeev RY, Berlin AA. Heat-Resistant Polymer Materials Based on Liquid Crystal Compounds. POLYMER SCIENCE SERIES C 2020. [DOI: 10.1134/s1811238220020034] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Skutnik RA, Geier IS, Schoen M. A biaxial nematic liquid crystal composed of matchbox-symmetric molecules. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1726520] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Robert A. Skutnik
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Technische Universität Berlin, Berlin, Germany
| | - Immanuel S. Geier
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Technische Universität Berlin, Berlin, Germany
| | - Martin Schoen
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Technische Universität Berlin, Berlin, Germany
- Department of Chemical Engineering, Imperial College London, London, UK
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4
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Kim DY, Jeong KU. Light responsive liquid crystal soft matters: structures, properties, and applications. LIQUID CRYSTALS TODAY 2019. [DOI: 10.1080/1358314x.2019.1653588] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Dae-Yoon Kim
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Kwang-Un Jeong
- Department of Polymer-Nano Science and Technology, Chonbuk National University, Jeonbuk, Korea
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Yu S, Lai Z, Jinnai H, Zeng X, Ageishi M, Lotz B, Cheng SZD, Zheng N, Zhang S, Feng X, Cao Y. Adding Symmetry: Cylindrically Confined Crystallization of Nylon-6. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02672] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Shichen Yu
- Institute for Advanced Study, Shenzhen University, Guangdong 518060, China
| | - Ziwei Lai
- Institute for Advanced Study, Shenzhen University, Guangdong 518060, China
| | - Hiroshi Jinnai
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan
| | - Xingming Zeng
- Institute for Advanced Study, Shenzhen University, Guangdong 518060, China
| | - Masaki Ageishi
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan
| | - Bernard Lotz
- Institut Charles Sadron (CNRS—ULP), 6, rue Boussingault, Strasbourg 67083, France
| | - Stephen Z. D. Cheng
- Advanced Institute for Soft Matter Science and Technology (AISMST), South China University of Technology, Guangdong 510640, China
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Nan Zheng
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangdong 513060, China
| | - Shuailin Zhang
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Xueyan Feng
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Yan Cao
- Institute for Advanced Study, Shenzhen University, Guangdong 518060, China
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Supramolecular conducting microfibers from amphiphilic tetrathiafulvalene-based organogelator. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2018.07.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Photochemical Isomerization and Topochemical Polymerization of the Programmed Asymmetric Amphiphiles. Sci Rep 2016; 6:28659. [PMID: 27339163 PMCID: PMC4919645 DOI: 10.1038/srep28659] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 06/06/2016] [Indexed: 01/13/2023] Open
Abstract
For the advancement in multi-stimuli responsive optical devices, we report the elaborate molecular engineering of the dual photo-functionalized amphiphile (abbreviated as AZ1DA) containing both a photo-isomerizable azobenzene and a photo-polymerizable diacetylene. To achieve the efficient photochemical reactions in thin solid films, the self-assembly of AZ1DA molecules into the ordered phases should be precisely controlled and efficiently utilized. First, the remote-controllable light shutter is successfully demonstrated based on the reversible trans-cis photo-isomerization of azobenzene group in the smectic A mesophase. Second, the self-organized monoclinic crystal phase allows us to validate the photo-polymerization of diacetylene moiety for the photo-patterned thin films and the thermo-responsible color switches. From the demonstrations of optically tunable thin films, it is realized that the construction of strong relationships between chemical structures, molecular packing structures and physical properties of the programmed molecules is the core research for the development of smart and multifunctional soft materials.
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Choi YJ, Kim DY, Park M, Yoon WJ, Lee Y, Hwang JK, Chiang YW, Kuo SW, Hsu CH, Jeong KU. Self-Assembled Hierarchical Superstructures from the Benzene-1,3,5-Tricarboxamide Supramolecules for the Fabrication of Remote-Controllable Actuating and Rewritable Films. ACS APPLIED MATERIALS & INTERFACES 2016; 8:9490-9498. [PMID: 27020653 DOI: 10.1021/acsami.6b03364] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The well-defined hierarchical superstructures constructed by the self-assembly of programmed supramolecules can be organized for the fabrication of remote-controllable actuating and rewritable films. To realize this concept, we newly designed and synthesized a benzene-1,3,5-tricarboxamide (BTA) derivative (abbreviated as BTA-3AZO) containing photoresponsive azobenzene (AZO) mesogens on the periphery of the BTA core. BTA-3AZO was first self-assembled to nanocolumns mainly driven by the intermolecular hydrogen-bonds between BTA cores, and these self-assembled nanocolumns were further self-organized laterally to form the low-ordered hexagonal columnar liquid crystal (LC) phase below the isotropization temperature. Upon cooling, a lamello-columnar crystal phase emerged at room temperature via a highly ordered lamello-columnar LC phase. The three-dimensional (3D) organogel networks consisted of fibrous and lamellar superstructures were fabricated in the BTA-3AZO cyclohexane-methanol solutions. By tuning the wavelength of light, the shape and color of the 3D networked thin films were remote-controlled by the conformational changes of azobenzene moieties in the BTA-3AZO. The demonstrations of remote-controllable 3D actuating and rewritable films with the self-assembled hierarchical BTA-3AZO thin films can be stepping stones for the advanced flexible optoelectronic devices.
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Affiliation(s)
- Yu-Jin Choi
- Polymer Materials Fusion Research Center & Department of Polymer-Nano Science and Technology, Chonbuk National University , Jeonju 561-756, Korea
| | - Dae-Yoon Kim
- Polymer Materials Fusion Research Center & Department of Polymer-Nano Science and Technology, Chonbuk National University , Jeonju 561-756, Korea
| | - Minwook Park
- Polymer Materials Fusion Research Center & Department of Polymer-Nano Science and Technology, Chonbuk National University , Jeonju 561-756, Korea
| | - Won-Jin Yoon
- Polymer Materials Fusion Research Center & Department of Polymer-Nano Science and Technology, Chonbuk National University , Jeonju 561-756, Korea
| | - Yumin Lee
- Polymer Materials Fusion Research Center & Department of Polymer-Nano Science and Technology, Chonbuk National University , Jeonju 561-756, Korea
| | - Joo-Kyoung Hwang
- Polymer Materials Fusion Research Center & Department of Polymer-Nano Science and Technology, Chonbuk National University , Jeonju 561-756, Korea
| | - Yeo-Wan Chiang
- Department of Materials Science and Optoelectronic Engineering, National Sun Yat-Sen University , Kaohsiung 804, Taiwan
| | - Shiao-Wei Kuo
- Department of Materials Science and Optoelectronic Engineering, National Sun Yat-Sen University , Kaohsiung 804, Taiwan
| | - Chih-Hao Hsu
- Department of Polymer Science, The University of Akron , Akron, Ohio 44325-3909, United States
| | - Kwang-Un Jeong
- Polymer Materials Fusion Research Center & Department of Polymer-Nano Science and Technology, Chonbuk National University , Jeonju 561-756, Korea
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Repasky PJ, Agra-Kooijman DM, Kumar S, Hartley CS. Smectic-A and Hexatic-B Liquid Crystal Phases of Sanidic Alkyl-Substituted Dibenzo[fg,op]naphthacenes. J Phys Chem B 2016; 120:2829-37. [DOI: 10.1021/acs.jpcb.5b10990] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Paul J. Repasky
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | | | - Satyendra Kumar
- Department
of Physics, Kent State University, Kent, Ohio 44242, United States
| | - C. Scott Hartley
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
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Kim DY, Kang DG, Shin S, Choi TL, Jeong KU. Hierarchical superstructures of norbornene-based polymers depending on dendronized side-chains. Polym Chem 2016. [DOI: 10.1039/c6py01286h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
For understanding the self-assembly behaviours of norbornene-based main-chain polymers depending on side-chain pendants, a series of polynorbornenes containing the programmed dendrons is newly designed and successfully synthesized via ring opening metathesis polymerization.
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Affiliation(s)
- Dae-Yoon Kim
- BK21 Plus Haptic Polymer Composite Research Team & Department of Polymer-Nano Science and Technology
- Chonbuk National University
- Jeonju
- Korea
| | - Dong-Gue Kang
- BK21 Plus Haptic Polymer Composite Research Team & Department of Polymer-Nano Science and Technology
- Chonbuk National University
- Jeonju
- Korea
| | - Suyong Shin
- Department of Chemistry
- Seoul National University
- Seoul 08826
- Korea
| | - Tae-Lim Choi
- Department of Chemistry
- Seoul National University
- Seoul 08826
- Korea
| | - Kwang-Un Jeong
- BK21 Plus Haptic Polymer Composite Research Team & Department of Polymer-Nano Science and Technology
- Chonbuk National University
- Jeonju
- Korea
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Kim DY, Lee SA, Park M, Choi YJ, Kang SW, Jeong KU. Multi-responsible chameleon molecule with chiral naphthyl and azobenzene moieties. SOFT MATTER 2015; 11:2924-2933. [PMID: 25742914 DOI: 10.1039/c5sm00073d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A photochromic chiral molecule with azobenzene mesogens and a (R)-configuration naphthyl moiety (abbreviated as NCA2M) was specifically designed and synthesized for the demonstration of chameleon-like color changes responding to multitudinous external stimuli, such as temperature, light and electric field. The basic phase transition behaviors of NCA2M were first studied by the combination of differential scanning calorimetry (DSC) and polarized optical microscopy (POM). Based on the structure-sensitive X-ray diffraction results obtained at different temperatures, it was comprehended that the NCA2M molecule exhibited the tilted version of highly ordered smectic crystal phase with 5.45 nm layer thickness. Chiral nematic (N*) liquid crystals (LC) with helical superstructures were formed by doping the NCA2M photochromic chiral molecule in an achiral nematic (N) LC medium. By controlling the helical pitch length of N*-LC with respect to temperature, light and electric field, the wavelength of selectively reflected light from the N* photonic crystal was finely tuned. The light-induced color change of N*-LC film was the most efficient method for covering the whole visible region from blue to green and to red, which allowed us to fabricate remote-controllable photo-responsive devices.
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Affiliation(s)
- Dae-Yoon Kim
- Polymer Materials Fusion Research Center & Department of Polymer-Nano Science and Technology, Chonbuk National University, Jeonju, Jeonbuk 561-756, Korea.
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Kim DY, Park M, Lee SA, Kim S, Hsu CH, Kim N, Kuo SW, Yoon TH, Jeong KU. Hierarchical superstructures from a star-shaped molecule consisting of a cyclic oligosiloxane with cyanobiphenyl moieties. SOFT MATTER 2015; 11:58-68. [PMID: 25407404 DOI: 10.1039/c4sm02239d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Unconventional star-shaped liquid crystals (abbreviated as SiLCs) were successfully synthesized by chemically connecting four cyanobiphenyl anisotropic mesogens to the periphery of a super-hydrophobic and ultra-flexible cyclic tetramethyltetrasiloxane ring with flexible hexyl chains. Based on the combined experimental techniques of differential scanning calorimetry (DSC), cross-polarized optical microscopy (POM), solid-state carbon-13 ((13)C) nuclear magnetic resonance (NMR) spectroscopy and one-dimensional (1D) wide-angle X-ray diffraction (WAXD), it was found that the SiLC molecule exhibited the monotropic phase transition from a LC phase to a crystalline phase. The crystalline phase was only detected during slow heating processes above its glass transition temperature, while a LC phase was formed both during cooling and during heating processes. The hierarchical superstructures were identified from the structure-sensitive 2D WAXD of the macroscopically oriented SiLC film and confirmed by selected area electron diffraction (SAED) of the SiLC single crystals. The molecular packing symmetry in the monoclinic unit cell was further investigated by computer simulations on the real and reciprocal spaces. Macroscopically oriented SiLC hierarchical superstructures on the different length scales may provide the targeted physical properties, which can allow us to apply SiLC molecules in the fields of electro-optical devices and nonlinear optics.
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Affiliation(s)
- Dae-Yoon Kim
- Department of Polymer-Nano Science and Technology & Polymer Materials Fusion Research Center, Chonbuk National University, Jeonju, Jeonbuk 561-756, Korea.
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Kim DY, Lee SA, Choi YJ, Hwang SH, Kuo SW, Nah C, Lee MH, Jeong KU. Thermal- and Photo-Induced Phase-Transition Behaviors of a Tapered Dendritic Liquid Crystal with Photochromic Azobenzene Mesogens and a Bicyclic Chiral Center. Chemistry 2014; 20:5689-95. [DOI: 10.1002/chem.201303924] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 02/10/2014] [Indexed: 11/07/2022]
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