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Han H, Choi JH, Ahn J, Lee H, Choi C, Jung W, Yeom J, Hwang DK, Sung BJ, Lim JA. Chiral Diketopyrrolopyrrole-Based Conjugated Polymers with Intramolecular Rotation-Isomeric Conformation Asymmetry for Near-Infrared Circularly Polarized Light-Sensing Organic Phototransistors. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 38032109 DOI: 10.1021/acsami.3c13976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
Recent advances in chiral nanomaterials interacting with circularly polarized (CP) light open new expectations for optoelectronics in various research fields such as quantum- and biology-related technology. To fully utilize the great potential of chiral optoelectronic devices, the development of chiral optoelectronic devices that function in the near-infrared (NIR) region is required. Herein, we demonstrate a NIR-absorbing, chiroptical, low-band-gap polymer semiconductor for high-performance NIR CP light phototransistors. A newly synthesized diketopyrrolopyrrole-based donor-acceptor-type chiral π-conjugated polymer with an asymmetric alkyl side chain exhibits strong chiroptical activity in a wavelength range of 700-1000 nm. We found that the attachment of an enantiomerically pure stereogenic alkyl substituent to the π-conjugated chromophore backbone led to strong chiroptical activity through symmetry breaking of the π-conjugation of the backbone in a molecular rotational motion while maintaining the coplanar backbone conformation for efficient charge transport. The NIR CP light-sensing phototransistors based on a chiral π-conjugated polymer photoactive single channel layer exhibit a high photoresponsivity of 26 A W-1 under NIR CP light irradiation at 920 nm, leading to excellent NIR CP light distinguishability. This study will provide a rationale and strategy for designing chiral π-conjugated polymers for high-performance NIR chiral optoelectronics.
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Affiliation(s)
- Hyemi Han
- Center for Optoelectronic Materials and Devices, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Jong Ho Choi
- Department of Chemistry, Sogang University, Seoul 04107, Republic of Korea
| | - Jongtae Ahn
- Center for Optoelectronic Materials and Devices, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Hanna Lee
- Center for Optoelectronic Materials and Devices, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Changsoon Choi
- Center for Optoelectronic Materials and Devices, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Wookjin Jung
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Jihyeon Yeom
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Do Kyung Hwang
- Center for Optoelectronic Materials and Devices, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- Division of Nanoscience and Technology, KIST School, University of Science and Technology (UST), Seoul 02792, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Republic of Korea
| | - Bong June Sung
- Department of Chemistry, Sogang University, Seoul 04107, Republic of Korea
| | - Jung Ah Lim
- Center for Optoelectronic Materials and Devices, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- Division of Nanoscience and Technology, KIST School, University of Science and Technology (UST), Seoul 02792, Republic of Korea
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Xiao C, Wu W, Liang W, Zhou D, Kanagaraj K, Cheng G, Su D, Zhong Z, Chruma JJ, Yang C. Redox‐Triggered Chirality Switching and Guest‐Capture/Release with a Pillar[6]arene‐Based Molecular Universal Joint. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916285] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Chao Xiao
- Key Laboratory of Green Chemistry & Technology of Ministry of EducationCollege of ChemistryState Key Laboratory of Biotherapy, and Healthy Food Evaluation Research CenterSichuan University Chengdu 610064 China
| | - Wanhua Wu
- Key Laboratory of Green Chemistry & Technology of Ministry of EducationCollege of ChemistryState Key Laboratory of Biotherapy, and Healthy Food Evaluation Research CenterSichuan University Chengdu 610064 China
| | - Wenting Liang
- Institute of Environmental SciencesShanxi University China
| | - Dayang Zhou
- Comprehensive Analysis Center, ISIROsaka University Japan
| | - Kuppusamy Kanagaraj
- Key Laboratory of Green Chemistry & Technology of Ministry of EducationCollege of ChemistryState Key Laboratory of Biotherapy, and Healthy Food Evaluation Research CenterSichuan University Chengdu 610064 China
| | - Guo Cheng
- Key Laboratory of Green Chemistry & Technology of Ministry of EducationCollege of ChemistryState Key Laboratory of Biotherapy, and Healthy Food Evaluation Research CenterSichuan University Chengdu 610064 China
| | - Dan Su
- Key Laboratory of Green Chemistry & Technology of Ministry of EducationCollege of ChemistryState Key Laboratory of Biotherapy, and Healthy Food Evaluation Research CenterSichuan University Chengdu 610064 China
| | - Zhihui Zhong
- Key Laboratory of Green Chemistry & Technology of Ministry of EducationCollege of ChemistryState Key Laboratory of Biotherapy, and Healthy Food Evaluation Research CenterSichuan University Chengdu 610064 China
| | - Jason J. Chruma
- Key Laboratory of Green Chemistry & Technology of Ministry of EducationCollege of ChemistryState Key Laboratory of Biotherapy, and Healthy Food Evaluation Research CenterSichuan University Chengdu 610064 China
| | - Cheng Yang
- Key Laboratory of Green Chemistry & Technology of Ministry of EducationCollege of ChemistryState Key Laboratory of Biotherapy, and Healthy Food Evaluation Research CenterSichuan University Chengdu 610064 China
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3
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Xiao C, Wu W, Liang W, Zhou D, Kanagaraj K, Cheng G, Su D, Zhong Z, Chruma JJ, Yang C. Redox-Triggered Chirality Switching and Guest-Capture/Release with a Pillar[6]arene-Based Molecular Universal Joint. Angew Chem Int Ed Engl 2020; 59:8094-8098. [PMID: 31958199 DOI: 10.1002/anie.201916285] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 01/18/2020] [Indexed: 11/05/2022]
Abstract
A chiral electrochemically responsive molecular universal joint (EMUJ) was synthesized by fusing a macrocyclic pillar[6]arene (P[6]) to a ferrocene-based side ring. A single crystal of an enantiopure EMUJ was successfully obtained, which allowed, for the first time, the definitive correlation between the absolute configuration and the circular dichroism spectrum of a P[6] derivative to be determined. The self-inclusion and self-exclusion conformational change of the EMUJ led to a chiroptical inversion of the P[6] moiety, which could be manipulated by both solvents and changes in temperature. The EMUJ also displayed a unique redox-triggered reversible in/out conformational switching, corresponding to an occupation/voidance switching of the P[6] cavity, respectively. This phenomenon is an unprecedented electrochemical manipulation of the capture and release of guest molecules by supramolecular hosts.
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Affiliation(s)
- Chao Xiao
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Biotherapy, and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, 610064, China
| | - Wanhua Wu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Biotherapy, and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, 610064, China
| | - Wenting Liang
- Institute of Environmental Sciences, Shanxi University, China
| | - Dayang Zhou
- Comprehensive Analysis Center, ISIR, Osaka University, Japan
| | - Kuppusamy Kanagaraj
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Biotherapy, and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, 610064, China
| | - Guo Cheng
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Biotherapy, and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, 610064, China
| | - Dan Su
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Biotherapy, and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, 610064, China
| | - Zhihui Zhong
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Biotherapy, and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, 610064, China
| | - Jason J Chruma
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Biotherapy, and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, 610064, China
| | - Cheng Yang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Biotherapy, and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, 610064, China
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Alaasar M, Poppe S, Dong Q, Liu F, Tschierske C. Isothermal Chirality Switching in Liquid-Crystalline Azobenzene Compounds with Non-Polarized Light. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705559] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mohamed Alaasar
- Institute of Chemistry; Martin-Luther University Halle-Wittenberg; Kurt-Mothes Str. 2 06120 Halle/Saale Germany
- Department of Chemistry; Faculty of Science; Cairo University; P.O. 12613 Giza Egypt
| | - Silvio Poppe
- Institute of Chemistry; Martin-Luther University Halle-Wittenberg; Kurt-Mothes Str. 2 06120 Halle/Saale Germany
| | - Qingshu Dong
- State Key Laboratory for Mechanical Behavior of Materials; Xi'an Jiaotong University; Xi'an 710049 P.R. China
| | - Feng Liu
- State Key Laboratory for Mechanical Behavior of Materials; Xi'an Jiaotong University; Xi'an 710049 P.R. China
| | - Carsten Tschierske
- Institute of Chemistry; Martin-Luther University Halle-Wittenberg; Kurt-Mothes Str. 2 06120 Halle/Saale Germany
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Isothermal Chirality Switching in Liquid-Crystalline Azobenzene Compounds with Non-Polarized Light. Angew Chem Int Ed Engl 2017; 56:10801-10805. [DOI: 10.1002/anie.201705559] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 07/10/2017] [Indexed: 12/31/2022]
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Lugger JAM, Sijbesma RP. Easily Accessible Thermotropic Hydrogen-Bonded Columnar Discotic Liquid Crystals from Fatty Acid- Tris-Benzoimidazolyl Benzene Complexes. ChemistryOpen 2016; 5:580-585. [PMID: 28032028 PMCID: PMC5167330 DOI: 10.1002/open.201600078] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Indexed: 11/13/2022] Open
Abstract
We report the formation of easily accessible hydrogen-bonded columnar discotic liquid crystals (LCs) based on tris-benzoimidazolyl benzene (TBIB) and commercially available fatty acids. By increasing the length of the fatty acid, the temperature range of liquid crystallinity was tuned. Introducing double bonds in octadecanoic acid lowered the crystallization temperature and increased the temperature range of the mesophase. Surprisingly, dimerized linoleic acid also forms an LC phase. When using branched aliphatic acids with the branching point close to the acid moiety, the mesophase was lost, whereas phosphonic acid or benzenesulfonic acid derivatives did have a mesophase, showing that the generality of this approach extends beyond carboxylic acids as the hydrogen-bond donor. Furthermore, a polymerizable LC phase was obtained from mixtures of TBIB with a methacrylate-bearing fatty acid, providing an approach for the fabrication of nanoporous polymer films if the methacrylate groups are polymerized. Finally, the higher solubility of methyl-TBIB was used to suppress phase separation in stoichiometric mixtures of the template molecule with fatty acids.
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Affiliation(s)
- Jody A. M. Lugger
- Laboratory of Macromolecular and Organic Chemistryand the Institute for Complex Molecular SystemsEindhoven University of TechnologyP. O. Box 5135600 MBEindhovenThe Netherlands
| | - Rint P. Sijbesma
- Laboratory of Macromolecular and Organic Chemistryand the Institute for Complex Molecular SystemsEindhoven University of TechnologyP. O. Box 5135600 MBEindhovenThe Netherlands
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Wu X, Xu L, Ma W, Liu L, Kuang H, Kotov NA, Xu C. Propeller-Like Nanorod-Upconversion Nanoparticle Assemblies with Intense Chiroptical Activity and Luminescence Enhancement in Aqueous Phase. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:5907-15. [PMID: 27158947 DOI: 10.1002/adma.201601261] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 04/05/2016] [Indexed: 05/23/2023]
Abstract
Propeller-like nanoscale assemblies with exceptionally intense chiroptical activity and strong luminescence are prepared using gold nanorods and upconversion nanoparticles. The circular dichroism intensity of the tetramer reached 80.9 mdeg, with g-factor value of 2.1 × 10(-2) . The enhancement factor of upconversion luminescence is as high as 21.3 in aqueous phase. Attomolar bioanalysis of a cancer biomarker with two model is also achieved, showing potential for early disease diagnosis and environmental monitoring.
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Affiliation(s)
- Xiaoling Wu
- State Key Lab of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- International Joint Research Laboratory for Biointerface and Biodetection and School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
| | - Liguang Xu
- State Key Lab of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- International Joint Research Laboratory for Biointerface and Biodetection and School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
| | - Wei Ma
- State Key Lab of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- International Joint Research Laboratory for Biointerface and Biodetection and School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
| | - Liqiang Liu
- State Key Lab of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- International Joint Research Laboratory for Biointerface and Biodetection and School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
| | - Hua Kuang
- State Key Lab of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- International Joint Research Laboratory for Biointerface and Biodetection and School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
| | - Nicholas A Kotov
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, 48109-2136, USA
| | - Chuanlai Xu
- State Key Lab of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- International Joint Research Laboratory for Biointerface and Biodetection and School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
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Mondal E, Lellouche JP, Naddaka M. Novel Carbazole (Cbz)-Based Carboxylated Functional Monomers: Design, Synthesis, and Characterization. ChemistryOpen 2015; 4:489-96. [PMID: 26478845 PMCID: PMC4603411 DOI: 10.1002/open.201500059] [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: 03/02/2015] [Indexed: 11/09/2022] Open
Abstract
A series of novel functional carbazole (Cbz)-based carboxylated monomers were synthesized and characterized. A Clauson-Kaas procedure, a deprotection step, amide coupling, and hydrolysis were utilized as key chemical reactions towards the multistep synthesis of monomers in good to excellent isolated yields. The design strategy was further extended to complex carbazole-COOH monomers incorporated arylazo groups as photoreactive moieties. In addition, photoreactive hybrid carbazole (Cbz)-pyrrole (Pyr)-based carboxylated monomers, comprising a pyrrole core linking a carbazole and a photoreactive phenylazide or benzophenone moiety through an amide spacer in the molecular structure, were also synthesized. The latter can be utilized for surface modification of polymeric films in their monomeric form or as polymeric microparticles (MPs).
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Affiliation(s)
- Ejabul Mondal
- Laboratory of Nanoscale Materials & System, Department of Chemistry, Nanomaterial Research Center, Institute of Nanotechnology & Advanced Materials, Bar-Ilan University Ramat-Gan, 5290002, Israel
| | - Jean-Paul Lellouche
- Laboratory of Nanoscale Materials & System, Department of Chemistry, Nanomaterial Research Center, Institute of Nanotechnology & Advanced Materials, Bar-Ilan University Ramat-Gan, 5290002, Israel
| | - Maria Naddaka
- Laboratory of Nanoscale Materials & System, Department of Chemistry, Nanomaterial Research Center, Institute of Nanotechnology & Advanced Materials, Bar-Ilan University Ramat-Gan, 5290002, Israel
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Supramolecular Columnar Liquid Crystals Formed by Hydrogen Bonding between a Clicked Star-Shapeds-Triazine and Benzoic Acids. Chemistry 2015; 21:8859-66. [DOI: 10.1002/chem.201500477] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Indexed: 12/19/2022]
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Wu ST, Cai ZW, Ye QY, Weng CH, Huang XH, Hu XL, Huang CC, Zhuang NF. Enantioselective Synthesis of a Chiral Coordination Polymer with Circularly Polarized Visible Laser. Angew Chem Int Ed Engl 2014; 53:12860-4. [DOI: 10.1002/anie.201407026] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 07/31/2014] [Indexed: 11/10/2022]
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Wu ST, Cai ZW, Ye QY, Weng CH, Huang XH, Hu XL, Huang CC, Zhuang NF. Enantioselective Synthesis of a Chiral Coordination Polymer with Circularly Polarized Visible Laser. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Bucoş M, Sierra T, Golemme A, Termine R, Barberá J, Giménez R, Serrano JL, Romero P, Marcos M. Multifunctional Supramolecular Dendrimers with ans-Triazine Ring as the Central Core: Liquid Crystalline, Fluorescence and Photoconductive Properties. Chemistry 2014; 20:10027-37. [DOI: 10.1002/chem.201402646] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Indexed: 01/20/2023]
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13
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Zennaro A, Hincapié CA, Martos A, Sebastián RM, Barberá J, Serrano JL, Sierra T. Polar Groups and Arylsulfonamides: A Good Combination with which to Obtain Supramolecular Columnar Liquid Crystals. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300222] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Hori R, Furukawa D, Yamamoto K, Kutsumizu S. Light-Driven Phase Transition in a Cubic-Phase-Forming Binary System Composed of 4′-n-Docosyloxy-3′-nitrobiphenyl-4-carboxylic Acid and an Azobenzene Derivative. Chemistry 2012; 18:7346-50. [DOI: 10.1002/chem.201200810] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2012] [Indexed: 11/07/2022]
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Yagai S, Goto Y, Karatsu T, Kitamura A, Kikkawa Y. Catenation of Self-Assembled Nanorings. Chemistry 2011; 17:13657-60. [DOI: 10.1002/chem.201102982] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Indexed: 11/11/2022]
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Aparicio F, García F, Fernández G, Matesanz E, Sánchez L. Mirror helices and helicity switch at surfaces based on chiral triangular-shape oligo(phenylene ethynylenes). Chemistry 2011; 17:2769-76. [PMID: 21271616 DOI: 10.1002/chem.201001596] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Revised: 08/23/2010] [Indexed: 11/09/2022]
Abstract
The self-assembly of triangular-shaped oligo(phenylene ethynylenes) (OPEs), peripherally decorated with chiral and linear paraffinic chains, is investigated in bulk, onto surfaces and in solution. Whilst the X-ray diffraction data for the chiral studied systems display a broad reflection centered at 2θ ∼20° (λ=Cu(Kα)), the higher crystallinity of OPE 3, endowed with three linear decyl chains, results in a diffractrogram with a number of well-resolved reflections that can be accurately indexed as a columnar packing arranged in 2D oblique cells. Compounds (S)-1 a and (R)-1 b-endowed with (S)- and (R)-3,7-dimethyloctyloxy chains-transfer their chirality to the supramolecular structures formed upon their self-assembly, and give rise to helical nanostructures of opposite handedness. A helicity switch is noticeable for the case of chiral (S)-2 decorated with (S)-2-methylnonyloxy chains which forms right-handed helices despite it possesses the same stereoconfiguration for their stereogenic carbons as (S)-1 a that self-assembles into left-handed helices. The stability and the mechanism of the supramolecular polymerization in solution have been investigated by UV/Vis experiments in methylcyclohexane. These studies demonstrate that the larger the distance between the stereogenic carbon and the aromatic framework is, the more stable the aggregate is. Additionally, the self-assembly mechanism is conditioned by the peripheral substituents: whereas compounds (S)-1 a and (R)-1 b self-assemble in a cooperative manner with a low degree of cooperativity, the aggregation of (S)-2 and 3 is well described by an isodesmic model. Therefore, the interaction between the chiral coil chains conditions the handedness of the helical pitch, the stability of the supramolecular structure and the supramolecular polymerization mechanism of the studied OPEs.
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Affiliation(s)
- Fátima Aparicio
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Ciudad Universitaria s/n, Madrid, Spain
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Takaishi K, Kawamoto M, Tsubaki K, Furuyama T, Muranaka A, Uchiyama M. Helical Chirality of Azobenzenes Induced by an Intramolecular Chiral Axis and Potential as Chiroptical Switches. Chemistry 2011; 17:1778-82. [DOI: 10.1002/chem.201003087] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Indexed: 11/09/2022]
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Vera F, Barberá J, Romero P, Serrano JL, Ros MB, Sierra T. Orthogonal action of noncovalent interactions for photoresponsive chiral columnar assemblies. Angew Chem Int Ed Engl 2010; 49:4910-4. [PMID: 20540124 DOI: 10.1002/anie.201000580] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Francisco Vera
- Instituto de Ciencia de Materiales de Aragón, Química Orgánica, Facultad de Ciencias, Universidad de Zaragoza-C.S.I.C. 50009 Zaragoza, Spain
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Vera F, Barberá J, Romero P, Serrano J, Ros M, Sierra T. Orthogonal Action of Noncovalent Interactions for Photoresponsive Chiral Columnar Assemblies. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000580] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Haberhauer G, Kallweit C. Ein verbrücktes Azobenzol-Derivat als reversibler lichtinduzierter Chiralitätsschalter. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200906731] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Haberhauer G, Kallweit C. A Bridged Azobenzene Derivative as a Reversible, Light-Induced Chirality Switch. Angew Chem Int Ed Engl 2010; 49:2418-21. [DOI: 10.1002/anie.200906731] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Ryu JH, Tang L, Lee E, Kim HJ, Lee M. Supramolecular Helical Columns from the Self-Assembly of Chiral Rods. Chemistry 2008; 14:871-81. [PMID: 17910017 DOI: 10.1002/chem.200701080] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Chiral-bridged rod molecules (CBRs) that consisted of bis(penta-p-phenylene) conjugated to an opened or closed chiral bridging group as a rigid segment and oligoether dendrons as flexible segments were synthesized and characterized. In the bulk state, both molecules self-assemble into a hexagonal columnar structure, as confirmed by X-ray scatterings and transmission electron microscopy (TEM) observations. Interestingly, these structures display opposite Cotton effects in the chromophore of the aromatic unit in spite of the same chirality (R,R) of the chiral bridging groups. The molecules were observed to self-assemble into cylindrical micellar aggregates in aqueous solution, as confirmed by light scattering and TEM investigations, and exhibit intense signals in the circular dichroism (CD) spectra, which are indicative of one-handed helical conformations. The CD spectra of each molecule showed opposite signals to each other, which were similar to those in the bulk. Notably, when the opened CBR was added to a solution of closed CBRs up to a certain concentration, the CD signal of the closed CBR was amplified. This implies that both molecules co-assemble into a one-handed helical structure because the opened chiral bridge is conformationally flexible, which is inverted to co-assemble with the closed CBR. These results demonstrate that small structural modifications of the chiral moiety can transfer the chiral information to a supramolecular assembly in the opposite way.
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Affiliation(s)
- Ja-Hyoung Ryu
- Center for Supramolecular Nano-Assembly and Department of Chemistry, Yonsei University, Shinchon 134, Seoul 120-749, Republic of Korea
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