1
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Ikai T, Mishima N, Matsumoto T, Miyoshi S, Oki K, Yashima E. 2,2'-Tethered Binaphthyl-Embedded One-Handed Helical Ladder Polymers: Impact of the Tether Length on Helical Geometry and Chiroptical Property. Angew Chem Int Ed Engl 2024; 63:e202318712. [PMID: 38253965 DOI: 10.1002/anie.202318712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 01/20/2024] [Accepted: 01/22/2024] [Indexed: 01/24/2024]
Abstract
Synthetic breakthroughs diversify the molecules and polymers available to chemists. We now report the first successful synthesis of a series of optically-pure 2,2'-tethered binaphthyl-embedded helical ladder polymers based on quantitative and chemoselective ladderization by the modified alkyne benzannulations using the 4-alkoxy-2,6-dimethylphenylethynyl group as the alkyne source, inaccessible by the conventional approach lacking the 2,6-dimethyl substituents. Due to the defect-free helix formation, the circular dichroism signal increased by more than 6 times the previously reported value. The resulting helical secondary structure can be fine-tuned by controlling the binaphthyl dihedral angle in the repeating unit with variations in the 2,2'-alkylenedioxy tethering groups by one carbon atom at a time. The optimization of the helical ladder structures led to a strong circularly polarized luminescence with a high fluorescence quantum yield (28 %) and luminescence dissymmetry factor (2.6×10-3 ).
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Affiliation(s)
- Tomoyuki Ikai
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST) Kawaguchi, Saitama, 332-0012, Japan
| | - Namiki Mishima
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
| | - Takehiro Matsumoto
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
| | - Sayaka Miyoshi
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
| | - Kosuke Oki
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
| | - Eiji Yashima
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering, Nagoya University Chikusa-ku, Nagoya, 464-8603, Japan
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2
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Bak IG, Chae CG, Lee JS. Synthetic Control of Helical Polyisocyanates by Living Anionic Polymerization toward Peptide Mimicry. Macromolecules 2022. [DOI: 10.1021/acs.macromol.1c02160] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- In Gyu Bak
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Chang-Geun Chae
- Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea
| | - Jae-Suk Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
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3
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Heo CH, Bak IG, Chae CG, Satoh T, Lee JS. Metal-free anionic polymerization of n-hexyl isocyanate catalyzed by phosphazene bases. Polym Chem 2020. [DOI: 10.1039/d0py00948b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Metal-free anionic polymerization of n-hexyl isocyanate (HIC) catalyzed by phosphazene bases in THF at −98 °C under 10−6 Torr was attempted to obtain poly(n-hexyl isocyanate) (PHIC) peptide mimics with a high purity.
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Affiliation(s)
- Chi-Ho Heo
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology (GIST)
- Gwangju 61005
- Republic of Korea
| | - In-Gyu Bak
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology (GIST)
- Gwangju 61005
- Republic of Korea
| | - Chang-Geun Chae
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology (GIST)
- Gwangju 61005
- Republic of Korea
| | - Toshifumi Satoh
- Faculty of Engineering
- Hokkaido University
- Sapporo 060-8628
- Japan
| | - Jae-Suk Lee
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology (GIST)
- Gwangju 61005
- Republic of Korea
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4
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Chae CG, Bak IG, Lansac Y, Samal S, Jang YH, Lee JS. Living Initiator-Transfer Anionic Polymerization of Isocyanates by Sodium Diphenylamide. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01523] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Chang-Geun Chae
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - In-Gyu Bak
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Yves Lansac
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 33 Techno Jungang-daero, Daegu 42988, Republic of Korea
- GREMAN, UMR 7347, CNRS, Université de Tours, 37200 Tours, France
| | - Shashadhar Samal
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Yun Hee Jang
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 33 Techno Jungang-daero, Daegu 42988, Republic of Korea
| | - Jae-Suk Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
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5
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Akagi K. Interdisciplinary Chemistry Based on Integration of Liquid Crystals and Conjugated Polymers: Development and Progress. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20190092] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Kazuo Akagi
- Department of Polymer Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
- Research Organization of Science and Technology, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
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6
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Hasegawa H, Terao K, Sato T, Nagata Y, Suginome M. Lyotropic Liquid Crystallinity of Linear and Star Poly(quinoxaline-2,3-diyl)s: Isotropic-Liquid Crystal Phase Equilibria in Tetrahydrofuran. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hirokazu Hasegawa
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
- Materials Characterization Laboratories, Toray Research Center, Inc., 3-3-7, Sonoyama, Otsu, Shiga 520-8567, Japan
| | - Ken Terao
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Takahiro Sato
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Yuuya Nagata
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Michinori Suginome
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
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7
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Maeda K, Yashima E. Helical Polyacetylenes Induced via Noncovalent Chiral Interactions and Their Applications as Chiral Materials. Top Curr Chem (Cham) 2017; 375:72. [PMID: 28730394 PMCID: PMC5519648 DOI: 10.1007/s41061-017-0161-4] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 07/11/2017] [Indexed: 12/12/2022]
Abstract
Construction of predominantly one-handed helical polyacetylenes with a desired helix sense utilizing noncovalent chiral interactions with nonracemic chiral guest compounds based on a supramolecular approach is described. As with the conventional dynamic helical polymers possessing optically active pendant groups covalently bonded to the polymer chains, this noncovalent helicity induction system can show significant chiral amplification phenomena, in which the chiral information of the nonracemic guests can transfer with high cooperativity through noncovalent bonding interactions to induce an almost single-handed helical conformation in the polymer backbone. An intriguing "memory effect" of the induced macromolecular helicity is observed for some polyacetylenes, which means that the helical conformations induced in dynamic helical polyacetylene can be transformed into metastable static ones by tuning their helix-inversion barriers. Potential applications of helical polyacetylenes with controlled helix sense constructed by the "noncovalent helicity induction and/or memory effect" as chiral materials are also described.
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Affiliation(s)
- Katsuhiro Maeda
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan.
| | - Eiji Yashima
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya, 464-8603, Japan.
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8
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Morrow SM, Bissette AJ, Fletcher SP. Transmission of chirality through space and across length scales. NATURE NANOTECHNOLOGY 2017; 12:410-419. [PMID: 28474691 DOI: 10.1038/nnano.2017.62] [Citation(s) in RCA: 161] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 03/09/2017] [Indexed: 05/26/2023]
Abstract
Chirality is a fundamental property and vital to chemistry, biology, physics and materials science. The ability to use asymmetry to operate molecular-level machines or macroscopically functional devices, or to give novel properties to materials, may address key challenges at the heart of the physical sciences. However, how chirality at one length scale can be translated to asymmetry at a different scale is largely not well understood. In this Review, we discuss systems where chiral information is translated across length scales and through space. A variety of synthetic systems involve the transmission of chiral information between the molecular-, meso- and macroscales. We show how fundamental stereochemical principles may be used to design and understand nanoscale chiral phenomena and highlight important recent advances relevant to nanotechnology. The survey reveals that while the study of stereochemistry on the nanoscale is a rich and dynamic area, our understanding of how to control and harness it and dial-up specific properties is still in its infancy. The long-term goal of controlling nanoscale chirality promises to be an exciting journey, revealing insight into biological mechanisms and providing new technologies based on dynamic physical properties.
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Affiliation(s)
- Sarah M Morrow
- Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, UK
| | - Andrew J Bissette
- Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, UK
| | - Stephen P Fletcher
- Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, UK
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9
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Effect of azo and ester linkages on rod shaped Schiff base liquid crystals and their photophysical investigations. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.06.081] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Liu L, Zang Y, Jia H, Aoki T, Kaneko T, Hadano S, Teraguchi M, Miyata M, Zhang G, Namikoshi T. Helix-Sense-Selective Polymerization of Achiral Phenylacetylenes and Unique Properties of the Resulting Cis-cisoidal Polymers. POLYM REV 2016. [DOI: 10.1080/15583724.2016.1160930] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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11
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Veerabhadraswamy BN, Rao DSS, Yelamaggad CV. Stable Ferroelectric Liquid Crystals Derived from Salicylaldimine-Core. J Phys Chem B 2015; 119:4539-51. [DOI: 10.1021/acs.jpcb.5b00209] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - D. S. Shankar Rao
- Centre for Nano and Soft Matter Sciences, Prof.
U. R. Rao Road, Post Box No. 1329, Jalahalli,
Bangalore 560 013, India
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12
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Veerabhadraswamy BN, Rao DSS, Prasad SK, Yelamaggad CV. Optically active, three-ring calamitic liquid crystals: the occurrence of frustrated, helical and polar fluid mesophases. NEW J CHEM 2015. [DOI: 10.1039/c4nj02011a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Five enantiomeric (R&S) pairs of liquid crystalline Schiff-bases prepared show a ferroelectric SmC* phase, besides N* and BP phases.
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Affiliation(s)
- B. N. Veerabhadraswamy
- Centre for Nano and Soft Matter Sciences (Formerly Centre for Soft Matter Research)
- Bangalore 560 013
- India
| | - D. S. Shankar Rao
- Centre for Nano and Soft Matter Sciences (Formerly Centre for Soft Matter Research)
- Bangalore 560 013
- India
| | - S. Krishna Prasad
- Centre for Nano and Soft Matter Sciences (Formerly Centre for Soft Matter Research)
- Bangalore 560 013
- India
| | - C. V. Yelamaggad
- Centre for Nano and Soft Matter Sciences (Formerly Centre for Soft Matter Research)
- Bangalore 560 013
- India
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13
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Jiang S, Zhao Y, Wang L, Yin L, Zhang Z, Zhu J, Zhang W, Zhu X. Photocontrollable induction of supramolecular chirality in achiral side chain Azo-containing polymers through preferential chiral solvation. Polym Chem 2015. [DOI: 10.1039/c5py00496a] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The preferred supramolecular chirality in aggregates of achiral azobenzene-containing polymers by limonene as a chiral transducer is achieved for the first time.
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Affiliation(s)
- Shunqin Jiang
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Yin Zhao
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Laibing Wang
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Lu Yin
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Zhengbiao Zhang
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Jian Zhu
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Wei Zhang
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Xiulin Zhu
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
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14
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Rahman ML, Yusoff MM, Kumar S. Synthesis and photoswitching properties of liquid crystals derived from myo-inositol. RSC Adv 2014. [DOI: 10.1039/c4ra05568c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new myo-inositol-based liquid crystal can be used for the creation of optical storage devices. The dark area is the UV-irradiated area forming a disordered isotropic phase, whereas the bright area protected from the light by using a mask remains in the ordered phase.
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Affiliation(s)
- Md Lutfor Rahman
- Faculty of Industrial Sciences & Technology
- Universiti Malaysia Pahang
- Kuantan, Malaysia
| | - Mashitah Mohd Yusoff
- Faculty of Industrial Sciences & Technology
- Universiti Malaysia Pahang
- Kuantan, Malaysia
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15
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Yang S, Wang B, Cui D, Kerwood D, Wilkens S, Han J, Luk YY. Stereochemical Control of Nonamphiphilic Lyotropic Liquid Crystals: Chiral Nematic Phase of Assemblies Separated by Six Nanometers of Aqueous Solvents. J Phys Chem B 2013; 117:7133-43. [DOI: 10.1021/jp401382h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Sijie Yang
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United
States
| | - Bing Wang
- Novartis Institutes for BioMedical Research, Inc., Cambridge, Massachusetts
02139, United States
| | - Dawei Cui
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United
States
| | - Deborah Kerwood
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United
States
| | - Stephan Wilkens
- Department
of Biochemistry and
Molecular Biology, Upstate Medical University, State University of New York, Syracuse, New York 13210, United
States
| | - Junjie Han
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United
States
| | - Yan-Yeung Luk
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United
States
- Department of Biomedical
and
Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
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16
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Liu L, Mottate K, Zhang G, Aoki T, Kaneko T, Teraguchi M. Chiral Amplification during Asymmetric-Induced Copolymerization of Phenylacetylenes with Tight Cis
-Cisoidal
Main Chains. Macromol Rapid Commun 2013; 34:1140-4. [DOI: 10.1002/marc.201300318] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Revised: 04/26/2013] [Indexed: 11/09/2022]
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17
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Dynamic scaffold of chiral binaphthol derivatives with the alkynylplatinum(II) terpyridine moiety. Proc Natl Acad Sci U S A 2013; 110:7986-91. [PMID: 23542379 DOI: 10.1073/pnas.1301252110] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Platinum(II)-containing complexes with inherently chiral binaphthol derivatives display a versatile scaffold between random coils and single-turn helical strands, in which the conformational transition is controlled by the Pt···Pt and π-π interactions of alkynylplatinum(II) terpyridine moiety upon solvent and temperature modulation. The bisignate Cotton effect in the circular dichroism spectra is indicative of the cooperative transformation from random coil state to a compact single-turn M- or P-helix. More importantly, as revealed by the appearance of new UV-vis absorption and emission bands during conformational change, the self-assembly of the platinum(II)-containing complex into a helical structure is assisted by the metal···metal and π-π interactions of the alkynylplatinum(II) terpyridine moieties. The folded structure with stabilization via metal···metal and π-π interactions has been supported by density functional theory calculations, which provide insights into the folded geometry of these kind of metallo-foldamers.
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18
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Satoh T, Ihara R, Kawato D, Nishikawa N, Suemasa D, Kondo Y, Fuchise K, Sakai R, Kakuchi T. Precise Synthesis of Clickable Poly(n-hexyl isocyanate). Macromolecules 2012. [DOI: 10.1021/ma300555v] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Toshifumi Satoh
- Division of Biotechnology and
Macromolecular Chemistry, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Ryosuke Ihara
- Division of Biotechnology and
Macromolecular Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Daisuke Kawato
- Biological Chemistry and Engineering
Course, Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Naoki Nishikawa
- Biological Chemistry and Engineering
Course, Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Daichi Suemasa
- Biological Chemistry and Engineering
Course, Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Yohei Kondo
- Biological Chemistry and Engineering
Course, Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Keita Fuchise
- Division of Biotechnology and
Macromolecular Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Ryosuke Sakai
- Department of Material Chemistry, Asahikawa National College of Technology, Asahikawa
071-8142, Japan
| | - Toyoji Kakuchi
- Division of Biotechnology and
Macromolecular Chemistry, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
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19
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Wang G, Zhang M, Zhang T, Guan J, Yang H. Photoresponsive behaviors of smectic liquid crystals tuned by an azobenzene chromophore. RSC Adv 2012. [DOI: 10.1039/c1ra00615k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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20
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Maeda K, Wakasone S, Shimomura K, Ikai T, Kanoh S. Helical polymer brushes with a preferred-handed helix-sense triggered by a terminal optically active group in the pendant. Chem Commun (Camb) 2012; 48:3342-4. [DOI: 10.1039/c2cc00024e] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Matsushita S, Kyotani M, Akagi K. Hierarchically Controlled Helical Graphite Films Prepared from Iodine-Doped Helical Polyacetylene Films Using Morphology-Retaining Carbonization. J Am Chem Soc 2011; 133:17977-92. [DOI: 10.1021/ja2082922] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Satoshi Matsushita
- Department of Polymer Chemistry, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Mutsumasa Kyotani
- Tsukuba Research Center for Interdisciplinary Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
| | - Kazuo Akagi
- Department of Polymer Chemistry, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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22
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Matsushita S, Akagi K. Synthesis of Conjugated Polymers in Chiral Nematic Liquid Crystal Fields. Isr J Chem 2011. [DOI: 10.1002/ijch.201100029] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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23
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Amplification of macromolecular helicity of dynamic helical poly(phenylacetylene)s bearing non-racemic alanine pendants in dilute solution, liquid crystal and two-dimensional crystal. Polym J 2011. [DOI: 10.1038/pj.2011.37] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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24
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Kawamura H, Takeyama Y, Yamamoto M, Kurihara H, Morino K, Yashima E. Chirality responsive helical poly(phenylacetylene) bearing L-proline pendants. Chirality 2011; 23 Suppl 1:E35-42. [DOI: 10.1002/chir.20954] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2010] [Accepted: 01/20/2011] [Indexed: 11/09/2022]
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25
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Ho RM, Chiang YW, Lin SC, Chen CK. Helical architectures from self-assembly of chiral polymers and block copolymers. Prog Polym Sci 2011. [DOI: 10.1016/j.progpolymsci.2010.09.001] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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26
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Thaler T, Guo LN, Mayer P, Knochel P. Highly Diastereoselective C(sp3)C(sp) Cross-Coupling Reactions between 1,3- and 1,4-Substituted Cyclohexylzinc Reagents and Bromoalkynes through Remote Stereocontrol. Angew Chem Int Ed Engl 2011; 50:2174-7. [DOI: 10.1002/anie.201006879] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Indexed: 11/10/2022]
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27
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Thaler T, Guo LN, Mayer P, Knochel P. Hoch diastereoselektive C(sp3)-C(sp)-Kreuzkupplungen zwischen 1,3- und 1,4-substituierten Cyclohexylzinkreagentien und Bromalkinen. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201006879] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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28
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Molla MR, Das A, Ghosh S. Chiral induction by helical neighbour: spectroscopic visualization of macroscopic-interaction among self-sorted donor and acceptor π-stacks. Chem Commun (Camb) 2011; 47:8934-6. [DOI: 10.1039/c1cc11178g] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Ohsawa S, Sakurai SI, Nagai K, Banno M, Maeda K, Kumaki J, Yashima E. Hierarchical Amplification of Macromolecular Helicity of Dynamic Helical Poly(phenylacetylene)s Composed of Chiral and Achiral Phenylacetylenes in Dilute Solution, Liquid Crystal, and Two-Dimensional Crystal. J Am Chem Soc 2010; 133:108-14. [DOI: 10.1021/ja1087453] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sousuke Ohsawa
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), Japan
| | - Shin-ichiro Sakurai
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), Japan
| | - Kanji Nagai
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), Japan
| | - Motonori Banno
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), Japan
| | - Katsuhiro Maeda
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), Japan
| | - Jiro Kumaki
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), Japan
| | - Eiji Yashima
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), Japan
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30
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Mathews M, Zola RS, Hurley S, Yang DK, White TJ, Bunning TJ, Li Q. Light-driven reversible handedness inversion in self-organized helical superstructures. J Am Chem Soc 2010; 132:18361-6. [PMID: 21126075 DOI: 10.1021/ja108437n] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report here a fast-photon-mode reversible handedness inversion of a self-organized helical superstructure (i.e., a cholesteric liquid crystal phase) using photoisomerizable chiral cyclic dopants. The two light-driven cyclic azobenzenophanes with axial chirality show photochemically reversible trans to cis isomerization in solution without undergoing thermal or photoinduced racemization. As chiral inducing agents, they exhibit good solubility, high helical twisting power, and a large change in helical twisting power due to photoisomerization in three commercially available, structurally different achiral liquid crystal hosts. Therefore, we were able to reversibly tune the reflection colors from blue to near-IR by light irradiation from the induced helical superstructure. More interestingly, the different switching states of the two chiral cyclic dopants were found to be able to induce a helical superstructure of opposite handedness. In order to unambiguously determine the helical switching, we employed a new method that allowed us to directly determine the handedness of the long-pitched self-organized cholesteric phase.
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Affiliation(s)
- Manoj Mathews
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, Ohio 44242, USA
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31
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Morimoto M, Tamura K, Nagai K, Yashima E. Chirality sensing of chiral pyrrolidines and piperazines with a liquid crystalline dynamic helical poly(phenylacetylene) bearing ethyl phosphonate pendant groups. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.23900] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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32
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Totsingan F, Jain V, Bracken WC, Faccini A, Tedeschi T, Marchelli R, Corradini R, Kallenbach NR, Green MM. Conformational Heterogeneity in PNA:PNA Duplexes. Macromolecules 2010. [DOI: 10.1021/ma902797f] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Filbert Totsingan
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003
- Herman F. Mark Polymer Research Institute, Polytechnic Institute of New York University, 6 MetroTech Center, Brooklyn, New York 11201
- Dipartimento di Chimica Organica ed Industriale, Università di Parma, Via G.P. Usberti 17/A, 43100 Parma, Italy
| | - Vipul Jain
- Herman F. Mark Polymer Research Institute, Polytechnic Institute of New York University, 6 MetroTech Center, Brooklyn, New York 11201
| | - W. Clay Bracken
- Department of Biochemistry, Weill Medical College of Cornell University, 1300 York Avenue, New York, New York 10021
| | - Andrea Faccini
- Dipartimento di Chimica Organica ed Industriale, Università di Parma, Via G.P. Usberti 17/A, 43100 Parma, Italy
| | - Tullia Tedeschi
- Dipartimento di Chimica Organica ed Industriale, Università di Parma, Via G.P. Usberti 17/A, 43100 Parma, Italy
| | - Rosangela Marchelli
- Dipartimento di Chimica Organica ed Industriale, Università di Parma, Via G.P. Usberti 17/A, 43100 Parma, Italy
| | - Roberto Corradini
- Dipartimento di Chimica Organica ed Industriale, Università di Parma, Via G.P. Usberti 17/A, 43100 Parma, Italy
| | - Neville R. Kallenbach
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003
| | - Mark M. Green
- Herman F. Mark Polymer Research Institute, Polytechnic Institute of New York University, 6 MetroTech Center, Brooklyn, New York 11201
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33
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Yashima E, Maeda K, Iida H, Furusho Y, Nagai K. Helical Polymers: Synthesis, Structures, and Functions. Chem Rev 2009; 109:6102-211. [PMID: 19905011 DOI: 10.1021/cr900162q] [Citation(s) in RCA: 1271] [Impact Index Per Article: 84.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Eiji Yashima
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Katsuhiro Maeda
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Hiroki Iida
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Yoshio Furusho
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Kanji Nagai
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan, and Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
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34
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Cui J, Lu X, Liu A, Wan X, Zhou Q. Long-Range Chirality Transfer in Free Radical Polymerization of Bulky Vinyl Monomers Containing Laterally Attached p-Terphenyl Groups. Macromolecules 2009. [DOI: 10.1021/ma900879f] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jiaxi Cui
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xiaocun Lu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Anhua Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xinhua Wan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Qifeng Zhou
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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35
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Mathews M, Tamaoki N. Reversibly tunable helicity induction and inversion in liquid crystal self-assembly by a planar chiroptic trigger molecule. Chem Commun (Camb) 2009:3609-11. [DOI: 10.1039/b905305k] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Yagi S, Hamakubo K, Ikawa S, Nakazumi H, Mizutani T. Homohelicity-enriched zinc bilinone dimers with chiral aliphatic spacers. Synthesis and application to chiral induction of a nematic liquid crystal. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.08.076] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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37
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Yashima E, Maeda K, Furusho Y. Single- and double-stranded helical polymers: synthesis, structures, and functions. Acc Chem Res 2008; 41:1166-80. [PMID: 18690750 DOI: 10.1021/ar800091w] [Citation(s) in RCA: 388] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Biological macromolecules, such as DNA and proteins, possess a unique and specific ordered structure, such as a right-handed double helix or a single alpha-helix. Those structures direct the sophisticated functions of these molecules in living systems. Inspired by biological helices, chemists have worked to synthesize polymers with controlled helicity, not only to mimic the biological helices but also to realize their functions. Although numerous synthetic polymers that fold into a single-handed helix have been reported, double-stranded helical polymers are almost unavailable except for a few oligomers. In addition, the exact structures of most helical polymers remain obscure. Therefore, the development of a conceptually new method for constructing double-stranded helical polymers and a reliable method for unambiguously determining the helical structures are important and urgent challenges in this area. In this Account, we describe the recent advances in the synthesis, structures, and functions of single- and double-stranded helical polymers from our group and others and provide a brief historical overview of synthetic helical polymers. We found unique macromolecules that fold into a preferred-handed helix through noncovalent bonding interactions with specific chiral guests. During the noncovalent helicity induction process, these guest molecules significantly amplified chirality in a dynamic helical polymer. During the intensive exploration of the helicity induction mechanism, we observed an unusual macromolecular helical memory in dynamic helical polymers. Furthermore, we found that rigid-rod helical poly(phenylacetylene)s and poly(phenyl isocyanide)s showing a cholesteric or smectic liquid crystal self-assemble to form two-dimensional crystals with a controlled helical conformation on solid substrates upon exposure to solvent vapors. We visualized their helical structures including the helical pitch and handedness by atomic force microscopy (AFM). We propose a modular strategy to construct complementary double helices by employing chiral amidinium-carboxylate salt bridges with m-terphenyl backbones. The double-stranded helical structures were characterized by circular dichroism in solution and X-ray diffraction of the crystals or the direct AFM observations. Serendipitously, we found that oligoresorcinols self-assemble into well-defined double helices resulting from interstrand aromatic stacking in water. These oligoresorcinols bound cyclic and linear oligosaccharides in water to form rotaxanes and hetero-double helices, respectively. The examples presented in this Account demonstrate the notable progress in the synthesis and structural determination of helical polymers including single- and double-stranded helices. Not only do we better understand the principle underlying the generation of helical conformations, but we have also used the knowledge of these unique helical structures to develop novel helical polymers with specific functions.
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Affiliation(s)
- Eiji Yashima
- Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), Japan
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Katsuhiro Maeda
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Yoshio Furusho
- Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), Japan
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
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38
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Zhang A, Rodríguez-Ropero F, Zanuy D, Alemán C, Meijer E, Schlüter A. A Rigid, Chiral, Dendronized Polymer with a Thermally Stable, Right-Handed Helical Conformation. Chemistry 2008; 14:6924-34. [DOI: 10.1002/chem.200800325] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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39
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Pijper D, Feringa BL. Control of dynamic helicity at the macro- and supramolecular level. SOFT MATTER 2008; 4:1349-1372. [PMID: 32907099 DOI: 10.1039/b801886c] [Citation(s) in RCA: 210] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this review, various systems developed in recent years which aim to control dynamic helicity at the macro- and supramolecular level are discussed. The strong interactions between the individual molecular components in these controlled helical assemblies, ranging from columnar aggregates to helical polymers and cholesteric liquid crystals, result in stereoinduction from the molecular level to the level of these macro- and supramolecular helical architectures. Therefore these systems are potentially useful for various applications, including responsive materials and chirality sensors and amplifiers.
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Affiliation(s)
- Dirk Pijper
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
| | - Ben L Feringa
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
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40
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Qi H, O'Neil J, Hegmann T. Chirality transfer in nematic liquid crystals doped with (S)-naproxen-functionalized gold nanoclusters: an induced circular dichroism study. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b712616f] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Sakurai SI, Ohsawa S, Nagai K, Okoshi K, Kumaki J, Yashima E. Two-Dimensional Helix-Bundle Formation of a Dynamic Helical Poly(phenylacetylene) with Achiral Pendant Groups on Graphite. Angew Chem Int Ed Engl 2007; 46:7605-8. [PMID: 17763511 DOI: 10.1002/anie.200701546] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shin-ichiro Sakurai
- Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency, Nagoya 463-0003, Japan.
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42
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Sakurai SI, Ohsawa S, Nagai K, Okoshi K, Kumaki J, Yashima E. Two-Dimensional Helix-Bundle Formation of a Dynamic Helical Poly(phenylacetylene) with Achiral Pendant Groups on Graphite. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200701546] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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43
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Hase Y, Mitsutsuji Y, Ishikawa M, Maeda K, Okoshi K, Yashima E. Unexpected Thermally Stable, Cholesteric Liquid-Crystalline Helical Polyisocyanides with Memory of Macromolecular Helicity. Chem Asian J 2007; 2:755-63. [PMID: 17458838 DOI: 10.1002/asia.200700051] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The achiral sodium salt of poly(4-carboxyphenyl isocyanide) (poly-1-Na) folds into a one-handed helix induced by optically active amines in water. The induced helicity remains when the optically active amines are completely removed, and further modification of the side groups to amide residues is possible without loss of memory of macromolecular helicity. Although the helical poly-1-Na loses its chiral memory at high temperature, helical polyisocyanides modified with achiral primary amines, which no longer have any chiral components, keep their memory perfectly even at 100 degrees C in N,N-dimethylformamide in some cases and exhibit cholesteric liquid-crystalline phases, thus providing a robust scaffold with heat resistance to which a variety of functional groups can be introduced.
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Affiliation(s)
- Yoko Hase
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
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44
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Pijper D, Feringa B. Molecular Transmission: Controlling the Twist Sense of a Helical Polymer with a Single Light-Driven Molecular Motor. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200604941] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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45
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Pijper D, Feringa BL. Molecular Transmission: Controlling the Twist Sense of a Helical Polymer with a Single Light-Driven Molecular Motor. Angew Chem Int Ed Engl 2007; 46:3693-6. [PMID: 17410629 DOI: 10.1002/anie.200604941] [Citation(s) in RCA: 152] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Dirk Pijper
- Department of Organic and Molecular Inorganic Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
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46
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Metselaar GA, Wezenberg SJ, Cornelissen JJLM, Nolte RJM, Rowan AE. Lyotropic liquid-crystalline behavior of polyisocyanodipeptides. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/pola.21891] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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47
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Maeda K, Yashima E. Dynamic Helical Structures: Detection and Amplification of Chirality. Top Curr Chem (Cham) 2006. [DOI: 10.1007/128_035] [Citation(s) in RCA: 209] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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48
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Kamberaj H, Low RJ, Neal MP. Correlation between molecular chirality and helical twisting power: a computer simulation study. Mol Phys 2006. [DOI: 10.1080/00268970500350898] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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49
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Kato T, Mizoshita N, Kishimoto K. Funktionelle flüssigkristalline Aggregate: selbstorganisierte weiche Materialien. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200501384] [Citation(s) in RCA: 191] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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50
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Hashidzume A, Shiota J, Ueno Y, Noda T, Takashima Y, Harada A, Kamachi M. Polymer formation utilizing ‘crisscross’ addition (crisscross addition polymerization) of acetaldehyde azine and 1,4-phenylene diisocyanate. POLYMER 2006. [DOI: 10.1016/j.polymer.2005.11.056] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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