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Hirose T, Kikuchi Y, Nakano T, Ohno T, Kawamura K, Nazri NB, Fujimori A, Kodama K, Yasutake M. Thermoreversible helical fibers from photoreactive triphenylene-derived liquid crystals in liquid paraffin. Heliyon 2023; 9:e22037. [PMID: 38053870 PMCID: PMC10694167 DOI: 10.1016/j.heliyon.2023.e22037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/29/2023] [Accepted: 11/02/2023] [Indexed: 12/07/2023] Open
Abstract
Liquid crystalline triphenylene derivatives, TPC1p-n (n = 6, 12, 14, 16) were prepared using p-alkoxycinnamate as the [2+2] photo-cyclization site. TPC1p-n (n = 12, 14, 16) showed Colr phase and gave crescent-shaped or helical fibers after UV-irradiated in liquid paraffin solutions at 90 and 110 °C in the Colr temperature range. The apparent photoreaction products were shown to be thermally reversible, i.e. they dissolved in liquid paraffin at high temperatures and reappeared on cooling, indicating that they were aggregates of oligomerized TPC1p-n. The reaction mechanism was discussed in terms of the structure of the liquid crystalline phase.
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Affiliation(s)
- Takuji Hirose
- Graduate School of Science and Engineering, Saitama University, 255 Shimo-ohkubo, Sakura, Saitama, 338-8570, Japan
| | - Yuka Kikuchi
- Graduate School of Science and Engineering, Saitama University, 255 Shimo-ohkubo, Sakura, Saitama, 338-8570, Japan
| | - Tomoaki Nakano
- Graduate School of Science and Engineering, Saitama University, 255 Shimo-ohkubo, Sakura, Saitama, 338-8570, Japan
| | - Tsukasa Ohno
- Graduate School of Science and Engineering, Saitama University, 255 Shimo-ohkubo, Sakura, Saitama, 338-8570, Japan
| | - Kengo Kawamura
- Graduate School of Science and Engineering, Saitama University, 255 Shimo-ohkubo, Sakura, Saitama, 338-8570, Japan
| | - Normazliana Binti Nazri
- Department of Applied Chemistry, Saitama University, 255 Shimo-ohkubo, Sakura, Saitama, 338-8570, Japan
| | - Atsuhiro Fujimori
- Graduate School of Science and Engineering, Saitama University, 255 Shimo-ohkubo, Sakura, Saitama, 338-8570, Japan
| | - Koichi Kodama
- Graduate School of Science and Engineering, Saitama University, 255 Shimo-ohkubo, Sakura, Saitama, 338-8570, Japan
| | - Mikio Yasutake
- Graduate School of Science and Engineering, Saitama University, 255 Shimo-ohkubo, Sakura, Saitama, 338-8570, Japan
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2
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Choi YJ, Koo J, Wi Y, Jang J, Oh M, Rim M, Ko H, Yoon WJ, You NH, Jeong KU. Coatable Negative Dispersion Retarder: Kinetically Controlled Self-Assembly Pathway of Butterfly-Shaped Molecular Building Blocks for the Construction of Nanocolumns. ACS APPLIED MATERIALS & INTERFACES 2023; 15:41000-41006. [PMID: 37585907 DOI: 10.1021/acsami.3c09139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Abstract
Disc-shaped building blocks with columnar phases have attracted attention for their potential in optical applications, including a retarder. However, to achieve coatable high-performance optical films, it is essential to understand a subtle interaction balance between building blocks and relevant self-assembled behaviors during material processing. Herein, we studied a self-assembled nanocolumn evaluation of linear butterfly-shaped dendrons (T-A3D) consisting of thiophene-based conjugated core and flexible alkyl dendron. X-ray diffraction provided insight into the unique hexagonal columnar liquid crystal phase of T-A3D, driven by intermolecular hydrogen bonding and coplanarity of the thiophene-based conjugated core. The formation of a self-assembled nanocolumn with high mobility enabled the uniaxial orientation of butterfly-shaped T-A3D on the aligned rod-shaped nematic reactive mesogens, resulting in a transparent and colorless two-layered negative retarder. The self-assembled nanocolumn consisting of butterfly-shaped molecule would break a new ground for developing advanced optical thin films.
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Affiliation(s)
- Yu-Jin Choi
- Department of Polymer-Nano Science and Technology and Department of Nanoconvergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
- Materials Department, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Jahyeon Koo
- Department of Polymer-Nano Science and Technology and Department of Nanoconvergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Youngjae Wi
- Department of Polymer-Nano Science and Technology and Department of Nanoconvergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Junhwa Jang
- Department of Polymer-Nano Science and Technology and Department of Nanoconvergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Mintaek Oh
- Department of Polymer-Nano Science and Technology and Department of Nanoconvergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Minwoo Rim
- Department of Polymer-Nano Science and Technology and Department of Nanoconvergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Hyeyoon Ko
- Department of Polymer-Nano Science and Technology and Department of Nanoconvergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Won-Jin Yoon
- Department of Chemistry and Biochemistry and Department of Mechanical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Nam-Ho You
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Chudong-ro 92, Bongdong-eup, Wanju-gun, Jeonbuk 55324, South Korea
| | - Kwang-Un Jeong
- Department of Polymer-Nano Science and Technology and Department of Nanoconvergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
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3
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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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4
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Koo J, Lim SI, Lee SH, Kim JS, Yu YT, Lee CR, Kim DY, Jeong KU. Polarized Light Emission from Uniaxially Oriented and Polymer-Stabilized AIE Luminogen Thin Films. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02513] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | | | | | | | | | | | - Dae-Yoon Kim
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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5
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Park M, Kang DG, Yoon WJ, Choi YJ, Koo J, Lim SI, Jeong KU. Programmed Hierarchical Hybrid Nanostructures from Fullerene-Dendrons and Pyrene-Dendrons. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1803291. [PMID: 30303613 DOI: 10.1002/smll.201803291] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 09/14/2018] [Indexed: 06/08/2023]
Abstract
The construction of fullerene (C60 ) hierarchical nanostructures with the help of amphiphilic molecules remains a challenging task in nanoscience and nanotechnology. Utilizing the host-guest complex concept, sub-10 nm layered superstructures are constructed from a monofunctionalized C60 dendron (C60 D, guest) and tweezer-like pyrene dendron (PD, host). Since C60 D and PD are asymmetric shape amphiphiles having liquid crystal (LC) dendrons, both C60 D and PD construct head-to-head bilayer superstructures by themselves. From fluorescence titration experiments, it is realized that the host-guest complex shows 1:1 stoichiometric binding with a binding constant (Ksv = 2.45 × 105 m-1 ). Based on the morphological observations and scattering analyses, it is found that buckle-like asymmetric building blocks (C60 D·PD) are self-assembled by the host-guest complex and construct multilayer hybrid nanostructures. The hierarchical hybrid nanostructures consist of the self-assembled C60 D·PD bilayer with a 2D C60 ·P nanoarray sandwiched between LC dendrons. This advanced strategy is expected to be a practicable and rational guideline for the fabrication of programmed hierarchical hybrid nanostructures.
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Affiliation(s)
- Minwook Park
- BK21 Plus Haptic Polymer Composite Research Team and Department of Polymer-Nano Science and Technology Chonbuk National University, Jeonju, 54896, South Korea
| | - Dong-Gue Kang
- BK21 Plus Haptic Polymer Composite Research Team and Department of Polymer-Nano Science and Technology Chonbuk National University, Jeonju, 54896, South Korea
| | - Won-Jin Yoon
- BK21 Plus Haptic Polymer Composite Research Team and Department of Polymer-Nano Science and Technology Chonbuk National University, Jeonju, 54896, South Korea
| | - Yu-Jin Choi
- BK21 Plus Haptic Polymer Composite Research Team and Department of Polymer-Nano Science and Technology Chonbuk National University, Jeonju, 54896, South Korea
| | - Jahyeon Koo
- BK21 Plus Haptic Polymer Composite Research Team and Department of Polymer-Nano Science and Technology Chonbuk National University, Jeonju, 54896, South Korea
| | - Seok-In Lim
- BK21 Plus Haptic Polymer Composite Research Team and Department of Polymer-Nano Science and Technology Chonbuk National University, Jeonju, 54896, South Korea
| | - Kwang-Un Jeong
- BK21 Plus Haptic Polymer Composite Research Team and Department of Polymer-Nano Science and Technology Chonbuk National University, Jeonju, 54896, South Korea
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6
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Kang DG, Ko H, Koo J, Lim SI, Kim JS, Yu YT, Lee CR, Kim N, Jeong KU. Anisotropic Thermal Interface Materials: Directional Heat Transfer in Uniaxially Oriented Liquid Crystal Networks. ACS APPLIED MATERIALS & INTERFACES 2018; 10:35557-35562. [PMID: 30088761 DOI: 10.1021/acsami.8b09982] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
For the development of anisotropic thermal interface materials (TIMs), a rod-shaped reactive monomer PNP-6MA is newly designed and successfully synthesized. PNP-6MA reveals a smectic A (SmA) mesophase between crystalline (K) and isotropic (I) phases. PNP-6MA can be oriented under a magnetic field ( B = 2 T), and its macroscopic orientation can be robustly stabilized by in situ polymerization. Even without macroscopic orientations, the fabricated thermal conducting liquid crystal (TCLC) films show the outstanding thermal conductivity of 1.21 W/m K, which is higher than conventional organic materials. The thermal conductivity of uniaxially and macroscopically oriented TCLC films can be 2.5 W/m K along the long axis of mesogenic core. The newly developed TCLC film can be used as a TIM between a high-power light-emitting diode and a heat sink.
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Affiliation(s)
| | | | | | | | | | | | | | - Namil Kim
- Smart Materials R&D Center , Korea Automotive Technology Institute , Cheonan 31214 , Republic of Korea
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7
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Wang S, Liu X, Wang A, Wang Z, Chen J, Zeng Q, Jiang X, Zhou H, Zhang L. High-Performance All-Solid-State Polymer Electrolyte with Controllable Conductivity Pathway Formed by Self-Assembly of Reactive Discogen and Immobilized via a Facile Photopolymerization for a Lithium-Ion Battery. ACS APPLIED MATERIALS & INTERFACES 2018; 10:25273-25284. [PMID: 29975039 DOI: 10.1021/acsami.8b04672] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
All-solid-state polymer electrolytes (SPEs) have aroused great interests as one of the most promising alternatives for liquid electrolyte in the next-generation high-safety, and flexible lithium-ion batteries. However, some disadvantages of SPEs such as inefficient ion transmission capacity and poor interface stability result in unsatisfactory cyclic performance of the assembled batteries. Especially, the solid cell is hard to be run at room temperature. Herein, a novel and flexible discotic liquid-crystal (DLC)-based cross-linked solid polymer electrolyte (DLCCSPE) with controlled ion-conducting channels is fabricated via a one-pot photopolymerization of oriented reactive discogen, poly(ethylene glycol)diacrylate, and lithium salt. The experimental results indicate that the macroscopic alignment of self-assembled columns in the DLCCSPEs is successfully obtained under annealing and effectively immobilized via the UV photopolymerization. Because of the existence of unique oriented structure in the electrolytes, the prepared DLCCSPE films exhibit higher ionic conductivities and better comprehensive electrochemical properties than the DLCCSPEs without controlled ion-conductive pathways. Especially, the assembled LiFePO4/Li cells with oriented electrolyte show an initial discharge capacity of 164 mA h g-1 at 0.1 C and average specific discharge capacities of 143, 135, and 149 mA h g-1 at the C-rates of 0.5, 1, and 0.2 C, respectively. In addition, the solid cell also shows the first discharge capacity of 124 mA h g-1 (0.2 C) at room temperature. The outstanding cell performance of the oriented DLCCSPE should be originated from the macroscopically oriented and self-assembled DLC, which can form ion-conducting channels. Thus, combining the excellent performance of DLCCSPE and the simple one-pot fabricating process of the DLC-based all-solid-state electrolyte, it is believed that the DLC-based electrolyte can be one of the most promising electrolyte materials for the next-generation high-safety solid lithium-ion batteries.
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Affiliation(s)
- Shi Wang
- School of Chemical Sciences , University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Xu Liu
- School of Chemical Sciences , University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Ailian Wang
- School of Chemical Sciences , University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Zhinan Wang
- School of Chemical Sciences , University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Jie Chen
- School of Chemical Sciences , University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Qinghui Zeng
- School of Chemical Sciences , University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Xiaorui Jiang
- Pulead Technology Industry Co., Ltd. , Beijing 102200 , China
| | - Henghui Zhou
- College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China
| | - Liaoyun Zhang
- School of Chemical Sciences , University of Chinese Academy of Sciences , Beijing 100049 , China
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8
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Lugger JA, Mulder DJ, Bhattacharjee S, Sijbesma RP. Homeotropic Self-Alignment of Discotic Liquid Crystals for Nanoporous Polymer Films. ACS NANO 2018; 12:6714-6724. [PMID: 29975513 PMCID: PMC6060402 DOI: 10.1021/acsnano.8b01822] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Accepted: 07/05/2018] [Indexed: 05/25/2023]
Abstract
Nanostructured polymer films with continuous, membrane-spanning pores from polymerizable hexagonal columnar discotic liquid crystals (LCs) were fabricated. A robust alignment method was developed to obtain homeotropic alignment of columns between glass surfaces by adding a small amount of a tri(ethylene glycol) modified analogue of the mesogen as a dopant that preferentially wets glass. The homeotropic LC alignment was fixated via a photoinitiated free radical copolymerization of a high-temperature tolerant trisallyl mesogen with a divinyl ester. Removal of the hydrogen-bonded template from the aligned columns afforded a nanoporous network with pores of nearly 1 nm in diameter perpendicular to the surface, and without noticeable collapse of the nanopores. The effect of pore orientation was demonstrated by an adsorption experiment in which homeotropic film showed a threefold increase in the initial uptake rate of methylene blue compared to planarly aligned films.
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Affiliation(s)
- Jody A.
M. Lugger
- Institute
for Complex Molecular Systems, Eindhoven
University of Technology, P.O. Box 513, Eindhoven, Netherlands 5600
MB
- Laboratory
of Supramolecular Polymer Chemistry, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven, Netherlands 5600 MB
| | - Dirk J. Mulder
- Laboratory
of Stimuli-Responsive Functional Materials and Devices, Department
of Chemical Engineering and Chemistry, Eindhoven
University of Technology, P.O. Pox 513, Eindhoven, Netherlands 5600
MB
| | - Subham Bhattacharjee
- Institute
for Complex Molecular Systems, Eindhoven
University of Technology, P.O. Box 513, Eindhoven, Netherlands 5600
MB
| | - Rint P. Sijbesma
- Institute
for Complex Molecular Systems, Eindhoven
University of Technology, P.O. Box 513, Eindhoven, Netherlands 5600
MB
- Laboratory
of Supramolecular Polymer Chemistry, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven, Netherlands 5600 MB
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9
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Zou C, Wang J, Wang M, Wu Y, Gu K, Shen Z, Xiong G, Yang H, Jiang L, Ikeda T. Patterning of Discotic Liquid Crystals with Tunable Molecular Orientation for Electronic Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1800557. [PMID: 29667319 DOI: 10.1002/smll.201800557] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 03/07/2018] [Indexed: 06/08/2023]
Abstract
The large-area formation of functional micropatterns with liquid crystals is of great significance for diversified applications in interdisciplinary fields. Meanwhile, the control of molecular alignment in the patterns is fundamental and prerequisite for the adequate exploitation of their photoelectric properties. However, it would be extremely complicated and challenging for discotic liquid crystals (DLCs) to achieve the goal, because they are insensitive to external fields and surface chemistry. Herein, a simple method of patterning and aligning DLCs on flat substrates is disclosed through precise control of the formation and dewetting of the capillary liquid bridges, within which the DLC molecules are confined. Large-area uniform alignment occurs spontaneously due to directional shearing force when the solvent is slowly evaporated and programmable patterns could be directly generated on desired substrates. Moreover, the in-plane column direction of DLCs is tunable by slightly tailoring their chemical structures which changes their self-assembly behaviors in liquid bridges. The patterned DLCs show molecular orientation-dependent charge transport properties and are promising for templating self-assembly of other materials. The study provides a facile method for manipulation of the macroscopic patterns and microscopic molecular orientation which opens up new opportunities for electronic applications of DLCs.
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Affiliation(s)
- Cheng Zou
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China
| | - Jingxia Wang
- Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Meng Wang
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China
| | - Yuchen Wu
- Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Kehua Gu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Zhihao Shen
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Guirong Xiong
- Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Huai Yang
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China
| | - Lei Jiang
- Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Tomiki Ikeda
- Research and Development Initiative, Chuo University, Tokyo, 112-8551, Japan
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10
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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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11
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Kang DG, Park M, Kim DY, Goh M, Kim N, Jeong KU. Heat Transfer Organic Materials: Robust Polymer Films with the Outstanding Thermal Conductivity Fabricated by the Photopolymerization of Uniaxially Oriented Reactive Discogens. ACS APPLIED MATERIALS & INTERFACES 2016; 8:30492-30501. [PMID: 27762538 DOI: 10.1021/acsami.6b10256] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
For the development of advanced heat transfer organic materials (HTOMs) with excellent thermal conductivities, triphenylene-based reactive discogens, 2,3,6,7,10,11-hexakis(but-3-enyloxy)triphenylene (HABET) and 4,4',4″,4‴,4'''',4'''''-(triphenylene-2,3,6,7,10,11-hexaylhexakis(oxy))hexakis(butane-1-thiol) (THBT), were synthesized as discotic liquid crystal (DLC) monomers and cross-linkers, respectively. A temperature-composition phase diagram of HABET-THBT mixtures was first established based on their thermal and microscopic analyses. From the experimental results, it was realized that the thermal conductivity of DLC HTOM was strongly affected by the molecular organizations on a macroscopic length scale. Macroscopic orientation of self-assembled columns in DLC HTOMs was effectively achieved under the rotating magnetic fields and successfully stabilized by the photopolymerization. The DLC HTOM polymer-stabilized at the LC phase exhibited the remarkable thermal conductivity above 1 W/mK. When the DLC HTOM was macroscopically oriented, the thermal conductivity was estimated to be 3 W/mK along the in-plane direction of DLC molecule. The outstanding thermal conductivity of DLC HTOM should be originated not only from the high content of two-dimensional aromatic discogens but also from the macroscopically oriented and self-assembled DLC. The newly developed DLC HTOM with an outstanding thermal conductivity as well as with an excellent mechanical sustainability can be applied as directional heat dissipating materials in electronic and display devices.
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Affiliation(s)
- Dong-Gue Kang
- BK21 Plus Haptic Polymer Composite Research Team & Department of Polymer Nano Science and Technology, Chonbuk National University , Jeonju 561-756, Korea
| | - Minwook Park
- BK21 Plus Haptic Polymer Composite Research Team & Department of Polymer Nano Science and Technology, Chonbuk National University , Jeonju 561-756, Korea
| | - Dae-Yoon Kim
- BK21 Plus Haptic Polymer Composite Research Team & Department of Polymer Nano Science and Technology, Chonbuk National University , Jeonju 561-756, Korea
| | - Munju Goh
- Carbon Composite Materials Research Center, Korea Institute of Science and Technology , Jeonbuk 565-905, Wanju-gun, Korea
| | - Namil Kim
- Smart Materials R&D Center, Korea Automotive Technology Institute , Cheonan 330-912, Korea
| | - Kwang-Un Jeong
- BK21 Plus Haptic Polymer Composite Research Team & Department of Polymer Nano Science and Technology, Chonbuk National University , Jeonju 561-756, Korea
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12
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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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13
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Im P, Kang DG, Kim DY, Choi YJ, Yoon WJ, Lee MH, Lee IH, Lee CR, Jeong KU. Flexible and Patterned Thin Film Polarizer: Photopolymerization of Perylene-based Lyotropic Chromonic Reactive Mesogens. ACS APPLIED MATERIALS & INTERFACES 2016; 8:762-771. [PMID: 26616135 DOI: 10.1021/acsami.5b09995] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A perylene-based reactive mesogen (DAPDI) forming a lyotropic chromonic liquid crystal (LCLC) phase was newly designed and synthesized for the fabrication of macroscopically oriented and patterned thin film polarizer (TFP) on the flexible polymer substrates. The anisotropic optical property and molecular self-assembly of DAPDI were investigated by the combination of microscopic, scattering and spectroscopic techniques. The main driving forces of molecular self-assembly were the face-to-face π-π intermolecular interaction among aromatic cores and the nanophase separation between hydrophilic ionic groups and hydrophobic aromatic cores. Degree of polarization for the macroscopically oriented and photopolymerized DAPDI TFP was estimated to be 99.81% at the λmax = 491 nm. After mechanically shearing the DAPDI LCLC aqueous solution on the flexible polymer substrates, we successfully fabricated the patterned DAPDI TFP by etching the unpolymerized regions selectively blocked by a photomask during the photopolymerization process. Chemical and mechanical stabilities were confirmed by the solvent and pencil hardness tests, and its surface morphology was further investigated by optical microscopy, atomic force microscopy, and three-dimensional surface nanoprofiler. The flexible and patterned DAPDI TFP with robust chemical and mechanical stabilities can be a stepping stone for the advanced flexible optoelectronic devices.
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Affiliation(s)
- Pureun Im
- Polymer Materials Fusion Research Center, Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea
| | - Dong-Gue Kang
- Polymer Materials Fusion Research Center, Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea
| | - Dae-Yoon Kim
- Polymer Materials Fusion Research Center, Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea
| | - Yu-Jin Choi
- Polymer Materials Fusion Research Center, Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea
| | - Won-Jin Yoon
- Polymer Materials Fusion Research Center, Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea
| | - Myong-Hoon Lee
- Polymer Materials Fusion Research Center, Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea
| | - In-Hwan Lee
- Division of Advanced Materials Engineering, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea
| | - Cheul-Ro Lee
- Division of Advanced Materials Engineering, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea
| | - Kwang-Un Jeong
- Polymer Materials Fusion Research Center, Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics, Chonbuk National University , Jeonju, Jeonbuk 561-756, Korea
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14
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Takenami K, Uemura S, Funahashi M. In situ polymerization of liquid-crystalline thin films of electron-transporting perylene tetracarboxylic bisimide bearing cyclotetrasiloxane rings. RSC Adv 2016. [DOI: 10.1039/c5ra23518a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A perylene tetracarboxylic bisimide (PTCBI) derivative bearing four cyclotetrasiloxane rings that forms a columnar phase at room temperature despite the presence of the bulky cyclotetrasiloxane rings and itsin situpolymerization were reported.
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Affiliation(s)
- Kaede Takenami
- Department of Advanced Materials Science
- Faculty of Engineering
- Kagawa University
- Takamatsu
- Japan
| | - Shinobu Uemura
- Department of Advanced Materials Science
- Faculty of Engineering
- Kagawa University
- Takamatsu
- Japan
| | - Masahiro Funahashi
- Department of Advanced Materials Science
- Faculty of Engineering
- Kagawa University
- Takamatsu
- Japan
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15
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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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