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Wang CI, Maier JC, Jackson NE. Accessing the electronic structure of liquid crystalline semiconductors with bottom-up electronic coarse-graining. Chem Sci 2024; 15:8390-8403. [PMID: 38846409 PMCID: PMC11151863 DOI: 10.1039/d3sc06749a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 05/01/2024] [Indexed: 06/09/2024] Open
Abstract
Understanding the relationship between multiscale morphology and electronic structure is a grand challenge for semiconducting soft materials. Computational studies aimed at characterizing these relationships require the complex integration of quantum-chemical (QC) calculations, all-atom and coarse-grained (CG) molecular dynamics simulations, and back-mapping approaches. However, these methods pose substantial computational challenges that limit their application to the requisite length scales of soft material morphologies. Here, we demonstrate the bottom-up electronic coarse-graining (ECG) of morphology-dependent electronic structure in the liquid-crystal-forming semiconductor, 2-(4-methoxyphenyl)-7-octyl-benzothienobenzothiophene (BTBT). ECG is applied to construct density functional theory (DFT)-accurate valence band Hamiltonians of the isotropic and smectic liquid crystal (LC) phases using only the CG representation of BTBT. By bypassing the atomistic resolution and its prohibitive computational costs, ECG enables the first calculations of the morphology dependence of the electronic structure of charge carriers across LC phases at the ∼20 nm length scale, with robust statistical sampling. Kinetic Monte Carlo (kMC) simulations reveal a strong morphology dependence on zero-field charge mobility among different LC phases as well as the presence of two-molecule charge carriers that act as traps and hinder charge transport. We leverage these results to further evaluate the feasibility of developing mesoscopic, field-based ECG models in future works. The fully CG approach to electronic property predictions in LC semiconductors opens a new computational direction for designing electronic processes in soft materials at their characteristic length scales.
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Affiliation(s)
- Chun-I Wang
- Department of Chemistry, University of Illinois at Urbana-Champaign 505 S Mathews Avenue Urbana Illinois 61801 USA
| | - J Charlie Maier
- Department of Chemistry, University of Illinois at Urbana-Champaign 505 S Mathews Avenue Urbana Illinois 61801 USA
| | - Nicholas E Jackson
- Department of Chemistry, University of Illinois at Urbana-Champaign 505 S Mathews Avenue Urbana Illinois 61801 USA
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2
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Maier JC, Wang CI, Jackson NE. Distilling coarse-grained representations of molecular electronic structure with continuously gated message passing. J Chem Phys 2024; 160:024109. [PMID: 38193551 DOI: 10.1063/5.0179253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Accepted: 12/14/2023] [Indexed: 01/10/2024] Open
Abstract
Bottom-up methods for coarse-grained (CG) molecular modeling are critically needed to establish rigorous links between atomistic reference data and reduced molecular representations. For a target molecule, the ideal reduced CG representation is a function of both the conformational ensemble of the system and the target physical observable(s) to be reproduced at the CG resolution. However, there is an absence of algorithms for selecting CG representations of molecules from which complex properties, including molecular electronic structure, can be accurately modeled. We introduce continuously gated message passing (CGMP), a graph neural network (GNN) method for atomically decomposing molecular electronic structure sampled over conformational ensembles. CGMP integrates 3D-invariant GNNs and a novel gated message passing system to continuously reduce the atomic degrees of freedom accessible for electronic predictions, resulting in a one-shot importance ranking of atoms contributing to a target molecular property. Moreover, CGMP provides the first approach by which to quantify the degeneracy of "good" CG representations conditioned on specific prediction targets, facilitating the development of more transferable CG representations. We further show how CGMP can be used to highlight multiatom correlations, illuminating a path to developing CG electronic Hamiltonians in terms of interpretable collective variables for arbitrarily complex molecules.
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Affiliation(s)
- J Charlie Maier
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Chun-I Wang
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Nicholas E Jackson
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
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Alamro FS, Ahmed HA, El-Atawy MA, Khushaim MS, Bedowr NS, Al-Faze R, Al-Kadhi NS. Physical and Thermal Characterizations of Newly Synthesized Liquid Crystals Based on Benzotrifluoride Moiety. MATERIALS (BASEL, SWITZERLAND) 2023; 16:4304. [PMID: 37374488 DOI: 10.3390/ma16124304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 05/29/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023]
Abstract
The mesomorphic stability and optical activity of new group-based benzotrifluoride liquid crystals, (E)-4-(((4-(trifluoromethyl) phenyl) imino) methyl) phenyl 4-(alkyloxy)benzoate, or In, were investigated. The end of the molecules connected to the benzotrifluoride moiety and the end of the phenylazo benzoate moiety have terminal alkoxy groups which can range in chain length from 6 to 12 carbons. The synthesized compounds' molecular structures were verified using FT-IR, 1H NMR, mass spectroscopy, and elemental analysis. Mesomorphic characteristics were verified using differential scanning calorimetry (DSC) and a polarized optical microscope (POM). All of the homologous series that have been developed display great thermal stability across a broad temperature range. Density functional theory (DFT) determined the examined compounds' geometrical and thermal properties. The findings showed that every compound is entirely planar. Additionally, by using the DFT approach, it was possible to link the experimentally found values of the investigated compounds' investigated compounds' mesophase thermal stability, mesophase temperature ranges, and mesophase type to the predicted quantum chemical parameters.
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Affiliation(s)
- Fowzia S Alamro
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Hoda A Ahmed
- Department of Chemistry, Faculty of Science, Cairo University, Cairo 12613, Egypt
| | - Mohamed A El-Atawy
- Chemistry Department, Faculty of Science, Alexandria University, Ibrahemia, P.O. Box 426, Alexandria 21321, Egypt
- Chemistry Department, Faculty of Science, Taibah University, Yanbu 46423, Saudi Arabia
| | - Muna S Khushaim
- Department of Physics, Faculty of Science, Taibah University, P.O. Box 30002, Al-Madina 41447, Saudi Arabia
- Strategic Research Labs, Taibah University, P.O. Box 30002, Al-Madina 41447, Saudi Arabia
| | - Noha S Bedowr
- Chemistry Department, Faculty of Science, Taibah University, Yanbu 46423, Saudi Arabia
| | - Rawan Al-Faze
- Department of Chemistry, Faculty of Science, Taibah University, Al-Madinah Al-Munawarah 30002, Saudi Arabia
| | - Nada S Al-Kadhi
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
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Zellman CO, Williams VE. Strategies for promoting discotic nematic phases. SOFT MATTER 2023; 19:2705-2709. [PMID: 36987609 DOI: 10.1039/d3sm00212h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
A series of discotic dimers were synthesized in an attempt to obtain nematic discotic liquid crystal phases. Although initial target compounds were nonmesogenic, the incorporation of bulky groups adjacent to the ester bridge, in conjunction with peripheral chains of mixed length, were used to promote the formation of an enantiotropic nematic phase.
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Affiliation(s)
- Carson O Zellman
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada.
| | - Vance E Williams
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada.
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Cigl M, Pociecha D, Jakubowski R, Kapuściński S, Kaszyński P. Paramagnetic Liquid Crystals With Close π-π Packing: The Effect of Blatter Radical Planarization on Behavior of Bent-Core Mesogens. Chemistry 2023; 29:e202203288. [PMID: 36524762 DOI: 10.1002/chem.202203288] [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: 10/20/2022] [Revised: 11/21/2022] [Accepted: 12/11/2022] [Indexed: 12/23/2022]
Abstract
A new, 19 π-delocalized electrons planar Blatter radical building block was developed and used to obtain paramagnetic bent-core liquid crystals. The mesogens were investigated by optical, thermal, powder XRD and DFT methods in the pure form and as binary mixtures. Comparison of their properties with those of the classical Blatter radical analogues revealed that planarization of the central angular element results in a significantly higher stability of the mesophases and increased molecular organization suitable for the formation of ordered banana and columnar mesophases with tighter π-π interactions. These results indicate access to a new, potentially rich class of functional paramagnetic soft materials.
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Affiliation(s)
- Martin Cigl
- Polish Academy of Sciences, Sienkiewicza 112, 90-363, Łódź, Poland.,Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 21, Prague, Czech Republic
| | - Damian Pociecha
- Faculty of Chemistry, University of Warsaw, Zwirki i Wigury 101, 02089, Warsaw, Poland
| | - Rafał Jakubowski
- Polish Academy of Sciences, Sienkiewicza 112, 90-363, Łódź, Poland
| | | | - Piotr Kaszyński
- Polish Academy of Sciences, Sienkiewicza 112, 90-363, Łódź, Poland.,Faculty of Chemistry, University of Łódź, Tamka 12, 91-403, Łódź, Poland.,Department of Chemistry, Middle Tennessee State University, Murfreesboro, TN 37132, USA
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Hida N, Nakajima T, Hara M, Seki T, Nagano S. Induced Smectic E Phase in a Binary Blend of Side-Chain Liquid Crystalline Polymers. Macromol Rapid Commun 2023; 44:e2200761. [PMID: 36367366 DOI: 10.1002/marc.202200761] [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: 09/22/2022] [Revised: 11/02/2022] [Indexed: 11/13/2022]
Abstract
Two liquid crystalline polymers containing an azobenzene or cyanobiphenyl mesogenic side chain that adopt smectic A phases are mechanically mixed at 1:1 mesogen molar ratio at an isotropic phase temperature and then cooled. The resultant binary polymer mixture behaves like a single component as revealed by polarized microscopy observation and differential scanning calorimetry, indicating that the binary mixture forms a fully compatible polymer blend. Moreover, the simple polymer blend unexpectedly leads to a higher-ordered smectic E phase where a herringbone structure is formed with restricted mesogen axis rotation. These results suggest a specific intermolecular interaction between the two mesogens, thereby inducing unusual compatibilized polymer blends and the most ordered liquid crystal (LC) phase.
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Affiliation(s)
- Naoki Hida
- Department of Molecular & Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8603, Japan
| | - Tatsunaga Nakajima
- Department of Chemistry, College of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima, Tokyo, 171-8501, Japan
| | - Mitsuo Hara
- Department of Molecular & Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8603, Japan
| | - Takahiro Seki
- Department of Molecular & Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8603, Japan
| | - Shusaku Nagano
- Department of Chemistry, College of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima, Tokyo, 171-8501, Japan
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Park W, Yun C, Yun S, Lee JJ, Bae S, Ho D, Earmme T, Kim C, Seo S. [1]Benzothieno[3,2-b][1]benzothiophene-based liquid crystalline organic semiconductor for solution-processed organic thin film transistors. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.07.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Lin Y, Li G, Yu P, Ercan E, Chen W. Organic liquid crystals in optoelectronic device applications:
Field‐effect
transistors, nonvolatile memory, and photovoltaics. J CHIN CHEM SOC-TAIP 2022. [DOI: 10.1002/jccs.202200061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Yan‐Cheng Lin
- Department of Chemical Engineering National Taiwan University Taipei Taiwan
- Advanced Research Center of Green Materials Science and Technology National Taiwan University Taipei Taiwan
| | - Guan‐Syuan Li
- Department of Chemical Engineering National Taiwan University Taipei Taiwan
| | - Ping‐Jui Yu
- Department of Chemical Engineering National Taiwan University Taipei Taiwan
| | - Ender Ercan
- Department of Chemical Engineering National Taiwan University Taipei Taiwan
- Advanced Research Center of Green Materials Science and Technology National Taiwan University Taipei Taiwan
| | - Wen‐Chang Chen
- Department of Chemical Engineering National Taiwan University Taipei Taiwan
- Advanced Research Center of Green Materials Science and Technology National Taiwan University Taipei Taiwan
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Sengupta R, Raghavendra, Pooja RG, Gupta SK, Kumar B, Joshi RS. Magnetic Surfaces for Photo-Isomerization of Azobenzene Based Polymer Probed Using Magneto Optical Method. Top Catal 2022. [DOI: 10.1007/s11244-022-01594-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Han MJ, Yun HS, Cho Y, Kim M, Yang C, Tsukruk VV, Yoon DK. Chiral Optoelectronic Functionalities via DNA-Organic Semiconductor Complex. ACS NANO 2021; 15:20353-20363. [PMID: 34874717 DOI: 10.1021/acsnano.1c08641] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We fabricate the bio-organic field-effect transistor (BOFET) with the DNA-perylene diimide (PDI) complex, which shows unusual chiroptical and electrical functionalities. DNA is used as the chirality-inducing scaffold and the charge-injection layer. The shear-oriented film of the DNA-PDI complex shows how the large-area periodic molecular orientation and the charge transport are related, generating drastically different optoelectronic properties at each DNA/PDI concentration. The resultant BOFET reveals chiral structures with a high charge carrier mobility, photoresponsivity, and photosensitivity, reaching 3.97 cm2 V-1 s-1, 1.18 A W-1, and 7.76 × 103, respectively. Interestingly, the BOFET enables the definitive response under the handedness of circularly polarized light with a high dissymmetry factor of approximately +0.14. This work highlights the natural chirality and anisotropy of DNA material and the electron conductivity of organic semiconducting molecules to be mutually used in significant chiro-optoelectronic functions as an added ability to the traditional OFET.
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Affiliation(s)
- Moon Jong Han
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Hee Seong Yun
- Department of Chemistry, KAIST, Daejeon 34141, Republic of Korea
| | - Yongjoon Cho
- Department of Energy Engineering, School of Energy and Chemical Engineering, Perovtronics Research Center, Low Dimensional Carbon Materials Center, UNIST, Ulsan 44919, Republic of Korea
- UNIST Central Research Facilities & School of Natural Science, UNIST, Ulsan 44919, Republic of Korea
| | - Minkyu Kim
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Changduk Yang
- Department of Energy Engineering, School of Energy and Chemical Engineering, Perovtronics Research Center, Low Dimensional Carbon Materials Center, UNIST, Ulsan 44919, Republic of Korea
- UNIST Central Research Facilities & School of Natural Science, UNIST, Ulsan 44919, Republic of Korea
| | - Vladimir V Tsukruk
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Dong Ki Yoon
- Department of Chemistry, KAIST, Daejeon 34141, Republic of Korea
- Graduate School of Nanoscience and Technology and KINC, KAIST, Daejeon 34141, Republic of Korea
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11
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Mesomorphic Behaviour and DFT Insight of Arylidene Schiff Base Liquid Crystals and Their Pyridine Impact Investigation. CRYSTALS 2021. [DOI: 10.3390/cryst11080978] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A new series of Schiff base liquid crystal have been prepared and studied. Schiff bases of p-alkyl aniline derivatives and 4-phenyl pyridine-4′-carbaldehyde were prepared. The terminal alkyl groups substituting aniline are of varied chain length, namely C8, C12 and C14. The structures of the compounds were elucidated by 1H NMR and 13C NMR. The mesomorphic thermal and optical characteristics of the samples were determined via differential thermal analysis (DSC) and polarization optical microscopy (POM). All compounds exhibit enantiotropic dimorphic mesophase behaviour, referred to as smectic X1 (SmX1) and smectic X2 (Sm A). Experimental results obtained for the mesophases were correlated with density functional theory (DFT) theoretical calculations. The results of the new series are further compared to two series of compounds bearing pyridine (two ring Schiff bases) and biphenyl, respectively, in their mesogens. The series of compounds of one pyridine ring are generally not mesomorphic. The results indicate that the alkyl chain length has a strong impact on the mesomorphic characteristics and thermal stabilities of the different mesophases. As a trend, the temperature ranges of both of smectic mesophases of all compounds are higher in new compounds bearing the 4-phenyl pyridine moiety. In addition, the total mesophase range is generally higher in the new compounds when compared to their biphenyl analogues. Finally, theoretical DFT calculations were performed to illustrate the experimental finding of the mesomorphic behaviour in terms of the molecular geometry and aromaticity, π–π stacking and LOL-π.
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Han MJ, Lee DW, Lee EK, Kim JY, Jung JY, Kang H, Ahn H, Shin TJ, Yoon DK, Park JI. Molecular Orientation Control of Liquid Crystal Organic Semiconductor for High-Performance Organic Field-Effect Transistors. ACS APPLIED MATERIALS & INTERFACES 2021; 13:11125-11133. [PMID: 33630587 DOI: 10.1021/acsami.0c22393] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The control of molecular orientation and ordering of liquid crystal (LC) organic semiconductor (OSC) for high-performance and thermally stable organic thin-film transistors is investigated. A liquid crystalline molecule, 2-(4-dodecyl thiophenyl)[1]dibenzothiopheno[6,5-b:6',5'-f]-thieno[3,2-b]thiophene (C12-Th-DBTTT) is synthesized, showing the highly ordered smectic X (SmX) phase, demonstrating molecular reorganization via thermal annealing. The resulting thermally evaporated polycrystalline film and solution-sheared thin film show high charge carrier mobilities of 9.08 and 27.34 cm2 V-1 s-1, respectively. Atomic force microscopy and grazing-incidence X-ray diffraction analyses prove that the random SmA1-like structure (smectic monolayer) is reorganized to the highly ordered SmA2-like structure (smectic bilayer) of C12-Ph-DBTTT at the crystal-SmX transition temperature region. Because of the strong intermolecular interactions between rigid DBTTT cores, the thin film devices of C12-Th-DBTTT show excellent thermal stability up to 300 °C, indicating that LC characterization of conventional OSC materials can obtain high electrical performance as well as superior thermal durability.
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Affiliation(s)
- Moon Jong Han
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Don-Wook Lee
- Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Samsung-ro 130, Yongtong-gu, Suwon-si, Gyeonggi-do 16678, Republic of Korea
| | - Eun Kyung Lee
- Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Samsung-ro 130, Yongtong-gu, Suwon-si, Gyeonggi-do 16678, Republic of Korea
| | - Joo-Young Kim
- Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Samsung-ro 130, Yongtong-gu, Suwon-si, Gyeonggi-do 16678, Republic of Korea
| | - Ji Young Jung
- Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Samsung-ro 130, Yongtong-gu, Suwon-si, Gyeonggi-do 16678, Republic of Korea
| | - Hyunbum Kang
- Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Samsung-ro 130, Yongtong-gu, Suwon-si, Gyeonggi-do 16678, Republic of Korea
| | - Hyungju Ahn
- Pohang Accelerator Laboratory, POSTECH, Pohang 37673, Republic of Korea
| | - Tae Joo Shin
- UNIST Central Research Facilities & School of Natural Science, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Dong Ki Yoon
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Department of Chemistry and KINC, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Jeong-Il Park
- Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Samsung-ro 130, Yongtong-gu, Suwon-si, Gyeonggi-do 16678, Republic of Korea
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Santos AB, Manfredi AM, Salla CA, Farias G, Girotto E, Eccher J, Westphal E, Curcio SF, Cazati T, Malvestiti I, Falcão EH, Bechtold IH, Gallardo H. Highly luminescent liquid crystals by connecting 1,3,4-oxadiazole with thiazolo[5,4-d]thiazole units. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114887] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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