1
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Zanatta N, Mittersteiner M, Aquino EC, Budragchaa T, Wessjohann LA, Bonacorso HG, Martins MAP. Synthesis of Methylene-Bridged Trifluoromethyl Azoles Using 5-(1,2,3-Triazol-1-yl)enones. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/s-0040-1719837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractA protocol for synthesizing triazole-containing pyrazolines and pyrazoles selectively using trifluoromethylated 5-(1,2,3-triazol-1-yl)enones as starting materials, is reported. The selectivity of the reaction was controlled by the nature of the hydrazine or derivative used: free hydrazines furnished the 1,5-regiosiomer exclusively in yields up to 98%, whereas protected hydrazines provided the 1,3-regioisomer in yields up to 77%. To demonstrate the synthetic versatility of the triazole-based enone, reactions with other unsymmetrical dinucleophiles (hydroxylamine hydrochloride and S-methyl isothiourea sulfates) allowed the selective preparation of triazole-containing isoxazoline and pyrimidine rings.
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Affiliation(s)
- Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria
| | - Mateus Mittersteiner
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria
- Department of Bioorganic Chemistry, Leibniz-Institute of Plant Biochemistry
| | - Estefania C. Aquino
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria
| | | | | | - Helio G. Bonacorso
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria
| | - Marcos A. P. Martins
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria
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2
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Nguyen ML, Byun J, Cho BK. The Role of the 1,2,3-Triazolyl Heterocycle in the Helical Columnar Assembly and Electric Field Response. J Phys Chem B 2021; 125:9027-9036. [PMID: 34342228 DOI: 10.1021/acs.jpcb.1c05301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Here, we have proven the role of the 1,2,3-triazolyl group in the helical assembly and electric field (E-field) response upon comparing liquid crystal analogs 1 and 2 based on 1,2,3-triazolyl and 1,3,4-oxadiazolyl linkers, respectively. An ordered helical column was only observed in 1, driven by the hydrogen-bonding interactions between the adjacent triazolyl nitrogen and hydrogen atoms. X-ray diffraction and energy simulations indicate that the helical column is a 112 helix and the helical axis does not coincide with the center of the molecular long axis. The key for the formation of the helical column is the tilted conformation of 1 originating from the steric repulsion between the triazolyl C-H and C-H of the aromatic core. Analysis of the dynamics in the simple hexagonal columnar phase revealed that the in-plane rotational motion of the triazolyl linker (1) is allowed, while the oxadiazolyl linker of 2 has limited conformational flexibility. A uniform alignment under an E-field only occurs in 1, demonstrating the requirement for conformational flexibility in the polar linker. This alignment enhances the electric conductance of 1 by approximately two-fold.
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Affiliation(s)
- Manh Linh Nguyen
- Department of Chemistry, Dankook University, 119, Dandae-ro, Chungnam 448-701, Korea
| | - Jaeduk Byun
- Department of Physics, Dankook University, 119, Dandae-ro, Chungnam 448-701, Korea
| | - Byoung-Ki Cho
- Department of Chemistry, Dankook University, 119, Dandae-ro, Chungnam 448-701, Korea
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3
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Feringán B, Cerdá J, Diosdado B, Aragó J, Ortí E, Giménez R, Sierra T. On the Structure and Chiral Aggregation of Liquid Crystalline Star-Shaped Triazines H-Bonded to Benzoic Acids. Chemistry 2020; 26:15313-15322. [PMID: 32608135 DOI: 10.1002/chem.202001271] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 06/12/2020] [Indexed: 11/08/2022]
Abstract
The ability of a star-shaped tris(triazolyl)triazine derivative to hierarchically build supramolecular chiral columnar organizations through the formation of H-bonded complexes with benzoic acids was studied from a theoretical and experimental point of view. The combined study has been done at three different levels including the study of the structure of the triazine core, the association with benzoic acids in stoichiometry 1:3, and the assembly of 1:3 complexes in helical aggregates. Although the star-shaped triazine core crystallizes in a non-C3 conformation, the C3 -symmetric conformation is theoretically predicted to be more stable and gives rise to a favorable C3 supramolecular 1:3 complex upon the interaction with three benzoic acids in their voids. In addition, calculations at different levels (DFT, PM7, and MM3) for the 1:3 host-guest complex predict the formation of large stable columnar helical aggregates stabilized by the compact packing of the interstitial acids by π-π and CH⋅⋅⋅π interactions. The acids restrict the movement of the the star-shaped triazine cores along the stacking axis causing a template effect in the self-assembly of the complex. Theoretical predictions correlate with experimental results, since the interaction with achiral or chiral 3,4,5-(4-alkoxybenzyloxy)benzoic acids gives rise to supramolecular complexes that organize in bulk hexagonal columnar mesophases stable at room temperature with intracolumnar order. The existence of supramolecular chirality in the mesophase was determined for complexes formed by acids derived from (S)-2-octanol. Chiral aggregation was also evidenced for complexes formed in dodecane.
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Affiliation(s)
- Beatriz Feringán
- Departamento de Química Orgánica, Instituto de Nanociencia y Materiales de Aragón (INMA), Universidad de Zaragoza-CSIC, 50009, Zaragoza, Spain
| | - Jesús Cerdá
- Instituto de Ciencia Molecular, Universidad de Valencia, 46980, Paterna, Spain
| | - Beatriz Diosdado
- Departamento de Química Orgánica, Instituto de Nanociencia y Materiales de Aragón (INMA), Universidad de Zaragoza-CSIC, 50009, Zaragoza, Spain
| | - Juan Aragó
- Instituto de Ciencia Molecular, Universidad de Valencia, 46980, Paterna, Spain
| | - Enrique Ortí
- Instituto de Ciencia Molecular, Universidad de Valencia, 46980, Paterna, Spain
| | - Raquel Giménez
- Departamento de Química Orgánica, Instituto de Nanociencia y Materiales de Aragón (INMA), Universidad de Zaragoza-CSIC, 50009, Zaragoza, Spain
| | - Teresa Sierra
- Departamento de Química Orgánica, Instituto de Nanociencia y Materiales de Aragón (INMA), Universidad de Zaragoza-CSIC, 50009, Zaragoza, Spain
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4
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Barroso R, Cabal MP, Jiménez A, Valdés C. Cascade and multicomponent synthesis of structurally diverse 2-(pyrazol-3-yl)pyridines and polysubstituted pyrazoles. Org Biomol Chem 2020; 18:1629-1636. [PMID: 32037410 DOI: 10.1039/c9ob02691f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The cascade reaction between N-tosylhydrazones and 2-alkynylpyridines leads to 2-(pyrazol-3-yl)pyridines, important structural motifs in ligands for transition metals and bioactive molecules. When the reaction is conducted with 2,6-diethynylpyridine, the important 2,6-bis(pyrazolyl)pyridines are obtained, featuring the arrangement of tridentate and also pentadentate ligands. A novel three-component version of the reaction has been designed, which involves the use of α-bromo-N-tosylhydrazones, alkynylpyridines and NH-azoles. The generality of the multicomponent reaction is further illustrated by the preparation of different polysubstituted pyrazoles by employing an array of terminal alkynes. In these multicomponent reactions, complex molecules featuring three different heterocycles are assembled in a single step from commercial materials, enabling the fast generation of molecular diversity.
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Affiliation(s)
- Raquel Barroso
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, c/ Julián Clavería 8, Oviedo 33006, Spain.
| | - María-Paz Cabal
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, c/ Julián Clavería 8, Oviedo 33006, Spain.
| | - Azucena Jiménez
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, c/ Julián Clavería 8, Oviedo 33006, Spain.
| | - Carlos Valdés
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, c/ Julián Clavería 8, Oviedo 33006, Spain.
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5
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Vinayakumara D, Kumar S, Prasad SK, Adhikari AV. Self-assembly of taper- and wedge-shaped maleimide derivatives: Synthesis and structure-property relationship. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.02.054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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6
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Nguyen ML, Byun J, Kim S, Hyun JW, Hur K, Shin TJ, Cho B. Ferroelectrically Switching Helical Columnar Assembly Comprising
Cisoid
Conformers of a 1,2,3‐Triazole‐based Liquid Crystal. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201813195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Manh Linh Nguyen
- Department of ChemistryDankook University 119, Dandae-ro Chungnam 448-701 Korea
| | - Jaeduk Byun
- Department of PhysicsDankook University 119, Dandae-ro Chungnam 448-701 Korea
| | - Suwoong Kim
- Department of ChemistryDankook University 119, Dandae-ro Chungnam 448-701 Korea
| | - June Won Hyun
- Department of PhysicsDankook University 119, Dandae-ro Chungnam 448-701 Korea
| | - Kahyun Hur
- Center for Computational ScienceKorea Institute of Science and Technology Seoul Korea
| | - Tae Joo Shin
- UNIST Central Research Facilities & School of Natural ScienceUNIST Ulsan 689-798 Korea
| | - Byoung‐Ki Cho
- Department of ChemistryDankook University 119, Dandae-ro Chungnam 448-701 Korea
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7
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Nguyen ML, Byun J, Kim S, Hyun JW, Hur K, Shin TJ, Cho BK. Ferroelectrically Switching Helical Columnar Assembly Comprising Cisoid Conformers of a 1,2,3-Triazole-based Liquid Crystal. Angew Chem Int Ed Engl 2019; 58:2749-2753. [PMID: 30589186 DOI: 10.1002/anie.201813195] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Indexed: 11/06/2022]
Abstract
The 1,2,3-triazole molecule, which is a product of click chemistry, possesses a high dipole moment and can be a useful polar motif for ferroelectric columnar liquid crystal (LC) materials-though it has not been used to date. Herein, we report the helical assembly and ferroelectric switching properties of a columnar liquid crystal comprising a naphthalene core and 1,2,3-triazolyl linkages. The molecule assembles into a double-stranded helical columnar LC structure (Colhel ). The X-ray simulations of cisoid and transoid columnar models suggest that the helical assembly comprises cisoid conformers with a non-zero dipole moment. The helical columns in the Colhel phase are aligned homeotropically under an electric field. The ferroelectric switching of the axial polarization can be observed in the temperature range of 105-115 °C in the Colhel phase, wherein the triazolyl hydrogen bonding along the column axis is weakened. The ferroelectric switching event is attributed to the rotation of the polar triazolyl units in response to the electric field.
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Affiliation(s)
- Manh Linh Nguyen
- Department of Chemistry, Dankook University, 119, Dandae-ro, Chungnam, 448-701, Korea
| | - Jaeduk Byun
- Department of Physics, Dankook University, 119, Dandae-ro, Chungnam, 448-701, Korea
| | - Suwoong Kim
- Department of Chemistry, Dankook University, 119, Dandae-ro, Chungnam, 448-701, Korea
| | - June Won Hyun
- Department of Physics, Dankook University, 119, Dandae-ro, Chungnam, 448-701, Korea
| | - Kahyun Hur
- Center for Computational Science, Korea Institute of Science and Technology, Seoul, Korea
| | - Tae Joo Shin
- UNIST Central Research Facilities & School of Natural Science, UNIST, Ulsan, 689-798, Korea
| | - Byoung-Ki Cho
- Department of Chemistry, Dankook University, 119, Dandae-ro, Chungnam, 448-701, Korea
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8
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van Cleuvenbergen S, Kędziora P, Fillaut JL, Verbiest T, Clays K, Akdas-Kilig H, Camerel F. Chiral Side Groups Trigger Second Harmonic Generation Activity in 3D Octupolar Bipyrimidine-Based Organic Liquid Crystals. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Stijn van Cleuvenbergen
- Department of Chemistry; Katholieke Universiteit Leuven; Celestijnenlaan 200D and F 3001 Leuven Belgium
| | - Przemysław Kędziora
- Polish Academy of Sciences; Institute of Molecular Physics; Smoluchowskiego 17 60-179 Poznań Poland
| | - Jean-Luc Fillaut
- Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS-; Université de Rennes 1; Campus de Beaulieu 35042 Rennes France
| | - Thierry Verbiest
- Department of Chemistry; Katholieke Universiteit Leuven; Celestijnenlaan 200D and F 3001 Leuven Belgium
| | - Koen Clays
- Department of Chemistry; Katholieke Universiteit Leuven; Celestijnenlaan 200D and F 3001 Leuven Belgium
| | - Huriye Akdas-Kilig
- Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS-; Université de Rennes 1; Campus de Beaulieu 35042 Rennes France
| | - Franck Camerel
- Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS-; Université de Rennes 1; Campus de Beaulieu 35042 Rennes France
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9
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van Cleuvenbergen S, Kędziora P, Fillaut JL, Verbiest T, Clays K, Akdas-Kilig H, Camerel F. Chiral Side Groups Trigger Second Harmonic Generation Activity in 3D Octupolar Bipyrimidine-Based Organic Liquid Crystals. Angew Chem Int Ed Engl 2017; 56:9546-9550. [PMID: 28675543 DOI: 10.1002/anie.201705138] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Indexed: 11/06/2022]
Abstract
The design of efficient noncentrosymmetric materials remains the ultimate goal in the field of organic second-order nonlinear optics. Unlike inorganic crystals currently used in second-order nonlinear optical applications, organic materials are an attractive alternative owing to their fast electro-optical response and processability, but their alignment into noncentrosymmetric film remains challenging. Here, symmetry breaking by judicious functionalization of 3D organic octupoles allows the emergence of multifunctional liquid crystalline chromophores which can easily be processed into large, flexible, thin, and self-oriented films with second harmonic generation responses competitive to the prototypical inorganic KH2 PO4 crystals. The liquid-crystalline nature of these chiral organic films also permits the modulation of the nonlinear optical properties owing to the sensitivity of the supramolecular organization to temperature, leading to the development of tunable macroscopic materials.
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Affiliation(s)
- Stijn van Cleuvenbergen
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200D and F, 3001, Leuven, Belgium
| | - Przemysław Kędziora
- Polish Academy of Sciences, Institute of Molecular Physics, Smoluchowskiego 17, 60-179, Poznań, Poland
| | - Jean-Luc Fillaut
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-, Université de Rennes 1, Campus de Beaulieu, 35042, Rennes, France
| | - Thierry Verbiest
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200D and F, 3001, Leuven, Belgium
| | - Koen Clays
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200D and F, 3001, Leuven, Belgium
| | - Huriye Akdas-Kilig
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-, Université de Rennes 1, Campus de Beaulieu, 35042, Rennes, France
| | - Franck Camerel
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-, Université de Rennes 1, Campus de Beaulieu, 35042, Rennes, France
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10
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Haydl AM, Hilpert LJ, Breit B. Regioconvergent and Enantioselective Rhodium-Catalyzed Hydroamination of Internal and Terminal Alkynes: A Highly Flexible Access to Chiral Pyrazoles. Chemistry 2016; 22:6547-51. [DOI: 10.1002/chem.201601198] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Alexander M. Haydl
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstrasse 21 79104 Freiburg im Breisgau Germany
| | - Lukas J. Hilpert
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstrasse 21 79104 Freiburg im Breisgau Germany
| | - Bernhard Breit
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstrasse 21 79104 Freiburg im Breisgau Germany
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11
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Blanco H, Iguarbe V, Barberá J, Serrano JL, Elduque A, Giménez R. Supramolecular Columnar Liquid Crystals with Tapered-Shape Simple Pyrazoles Obtained by Efficient Henry/Michael Reactions. Chemistry 2016; 22:4924-30. [PMID: 26890692 DOI: 10.1002/chem.201504779] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Indexed: 11/10/2022]
Abstract
A straightforward synthesis of mesogenic pyrazoles starting from benzaldehydes by a combination of efficient Henry and Michael reactions led to novel supramolecular liquid crystals. The mesogens are fluorescent 3,5-dimethyl-4-(di or trialkoxyphenyl)pyrazoles and, in spite of the tapered shape of these molecules and their structural simplicity (only one phenyl ring), columnar liquid-crystal phases were formed that are stable at room temperature. The self-assembled structure was studied by XRD and the columnar cross section contains two molecules on average with an antiparallel arrangement of pyrazoles interacting through hydrogen bonds. In contrast, the single-crystal structure of a trimethoxy analog did not show hydrogen-bonded pyrazoles but chains of head-to-tail arranged molecules.
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Affiliation(s)
- Hugo Blanco
- Instituto de Ciencia de Materiales de Aragón (ICMA), Dpto de Química Orgánica, Facultad de Ciencias, CSIC-Universidad de Zaragoza, 50009, Zaragoza, Spain
| | - Verónica Iguarbe
- Instituto de Ciencia de Materiales de Aragón (ICMA), Dpto de Química Orgánica, Facultad de Ciencias, CSIC-Universidad de Zaragoza, 50009, Zaragoza, Spain
| | - Joaquín Barberá
- Instituto de Ciencia de Materiales de Aragón (ICMA), Dpto de Química Orgánica, Facultad de Ciencias, CSIC-Universidad de Zaragoza, 50009, Zaragoza, Spain
| | - José Luis Serrano
- Dpto de Química Orgánica, Facultad de Ciencias, Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018, Zaragoza, Spain
| | - Anabel Elduque
- Dpto de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Facultad de Ciencias, CSIC-Universidad de Zaragoza, 50009, Zaragoza, Spain.
| | - Raquel Giménez
- Instituto de Ciencia de Materiales de Aragón (ICMA), Dpto de Química Orgánica, Facultad de Ciencias, CSIC-Universidad de Zaragoza, 50009, Zaragoza, Spain.
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12
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Cienega-Cacerez O, García-Alcántara C, Moreno-Razo JA, Díaz-Herrera E, Sambriski EJ. Induced stabilization of columnar phases in binary mixtures of discotic liquid crystals. SOFT MATTER 2016; 12:1295-1312. [PMID: 26576703 DOI: 10.1039/c5sm01959a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Three discotic liquid-crystalline binary mixtures, characterized by their extent of bidispersity in molecular thickness, were investigated with molecular dynamics simulations. Each equimolar mixture contained A-type (thin) and B-type (thick) discogens. The temperature-dependence of the orientational order parameter reveals that A-type liquid samples produce ordered phases more readily, with the (hexagonal) columnar phase being the most structured variant. Moderately and strongly bidisperse mixtures produce globally-segregated samples for temperatures corresponding to ordered phases; the weakly bidisperse mixture displays microheterogeneities. Ordered phases in the B-type liquid are induced partially by the presence of the A-type fluid. In the moderately bidisperse mixture, order is induced through orientational frustration: a mixed prenematic-like phase precedes global segregation to yield nematic and columnar mesophases upon further cooling. In the strongly bidisperse mixture, order is induced less efficiently through a paranematic-like mechanism: a highly-ordered A-type fluid imparts order to B-type discogens found at the interface of a fully-segregated sample. This ordering effect permeates into the disordered B-type domain until nematic and columnar phases emerge upon further cooling. At sufficiently low temperatures, all samples investigated exhibit the (hexagonal) columnar mesophase.
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Affiliation(s)
- Octavio Cienega-Cacerez
- Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, Avenida San Rafael Atlixco No. 186, Colonia Vicentina, Delegación Iztapalapa, México, D.F. 09340, Mexico
| | - Consuelo García-Alcántara
- Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, Avenida San Rafael Atlixco No. 186, Colonia Vicentina, Delegación Iztapalapa, México, D.F. 09340, Mexico and Unidad Multidisciplinaria de Docencia e Investigación-Juriquilla, Facultad de Ciencias, Universidad Nacional Autónoma de México, Campus Juriquilla, Boulevard Juriquilla 3001, Juriquilla, Querétaro 76230, Mexico
| | - José Antonio Moreno-Razo
- Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, Avenida San Rafael Atlixco No. 186, Colonia Vicentina, Delegación Iztapalapa, México, D.F. 09340, Mexico
| | - Enrique Díaz-Herrera
- Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, Avenida San Rafael Atlixco No. 186, Colonia Vicentina, Delegación Iztapalapa, México, D.F. 09340, Mexico
| | - Edward John Sambriski
- Department of Chemistry, Delaware Valley University, 700 East Butler Avenue, Doylestown, Pennsylvania 18901, USA.
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13
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Synthesis and phase behavior of dendrons derived from 3,4,5-tris(tetradecyloxy)benzoic acid with different functional groups in focal point. J CHEM SCI 2015. [DOI: 10.1007/s12039-015-0945-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Wöhrle T, Wurzbach I, Kirres J, Kostidou A, Kapernaum N, Litterscheidt J, Haenle JC, Staffeld P, Baro A, Giesselmann F, Laschat S. Discotic Liquid Crystals. Chem Rev 2015; 116:1139-241. [PMID: 26483267 DOI: 10.1021/acs.chemrev.5b00190] [Citation(s) in RCA: 422] [Impact Index Per Article: 46.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tobias Wöhrle
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Iris Wurzbach
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Jochen Kirres
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Antonia Kostidou
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Nadia Kapernaum
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Juri Litterscheidt
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Johannes Christian Haenle
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Peter Staffeld
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Angelika Baro
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Frank Giesselmann
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Sabine Laschat
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
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Pérez-Aguilar MC, Valdés C. Synthesis of Chiral Pyrazoles: A 1,3-Dipolar Cycloaddition/[1,5] Sigmatropic Rearrangement with Stereoretentive Migration of a Stereogenic Group. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506881] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Pérez-Aguilar MC, Valdés C. Synthesis of Chiral Pyrazoles: A 1,3-Dipolar Cycloaddition/[1,5] Sigmatropic Rearrangement with Stereoretentive Migration of a Stereogenic Group. Angew Chem Int Ed Engl 2015; 54:13729-33. [DOI: 10.1002/anie.201506881] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Indexed: 11/12/2022]
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Park S, Cho BK. Sequential phase transformation of propeller-like C3-symmetric liquid crystals from a helical to ordered to disordered hexagonal columnar structure. SOFT MATTER 2015; 11:94-101. [PMID: 25370808 DOI: 10.1039/c4sm02004a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this paper, we report thermally induced intercolumnar phase transitions of C3-symmetric liquid crystals (LCs) bearing a triazole-based propeller-like aromatic mesogen. Since the constituting aromatic rings are conjugated through rotatable single bonds, the mesogenic shape is tuneable depending on the degree of conformational motion. Molecule 1 with ninefold octyl peripheries shows a hexagonal columnar liquid crystalline phase transition from ordered mesogenic stacking to disordered mesogenic stacking upon heating. On the other hand, molecule 2 with sixfold octyl peripheries displays a helical hexagonal columnar phase with the P6/mmm space group at ambient temperature as well as the ordered and disordered hexagonal columnar phases at higher temperatures. The intracolumnar helical order can be understood by an interdigitated stacking of the propeller-like mesogens along the columnar axis and the optimized space-filling. Notably, all the intercolumnar phase transformations in this study are revealed as second-order transitions. The thermodynamic nature agrees well with the fact that the conformational motions of the C3-symmetric aromatic mesogen change abruptly with each columnar transition.
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Affiliation(s)
- Soyoung Park
- Department of Chemistry and Institute of Nanosensor and Biotechnology, Dankook University, Gyeonggi-Do 448-701, Korea.
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Beltrán E, Barberá J, Serrano JL, Elduque A, Giménez R. Chiral Cyclic Trinuclear Gold(I) Complexes with a Helical Columnar Phase. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201301487] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Eduardo Beltrán
- Departamento de Química Orgánica, Facultad de Ciencias – Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC – Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain, http://www.icma.unizar‐csic.es
| | - Joaquín Barberá
- Departamento de Química Orgánica, Facultad de Ciencias – Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC – Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain, http://www.icma.unizar‐csic.es
| | - José Luis Serrano
- Departamento de Química Orgánica, Facultad de Ciencias – Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC – Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain, http://www.icma.unizar‐csic.es
- Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, Mariano Esquillor s/n, 50018 Zaragoza, Spain
| | - Anabel Elduque
- Departamento de Química Inórgánica, Facultad de Ciencias – Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC – Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain, http://www.ciencias.unizar.es
| | - Raquel Giménez
- Departamento de Química Orgánica, Facultad de Ciencias – Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC – Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain, http://www.icma.unizar‐csic.es
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Beltrán E, Robles-Hernández B, Sebastián N, Serrano JL, Giménez R, Sierra T. Bent-core luminescent and electroactive bis(triazolyl)triazines with compact columnar mesomorphism. RSC Adv 2014. [DOI: 10.1039/c4ra02926g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Pérez-Gregorio V, Giner I, Carmen López M, Gascón I, Cavero E, Giménez R. Influence of the liquid crystal behaviour on the Langmuir and Langmuir–Blodgett film supramolecular architecture of an ionic liquid crystal. J Colloid Interface Sci 2012; 375:94-101. [DOI: 10.1016/j.jcis.2012.02.049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 02/16/2012] [Accepted: 02/18/2012] [Indexed: 11/15/2022]
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Beltrán E, Serrano JL, Sierra T, Giménez R. Functional star-shaped tris(triazolyl)triazines: columnar liquid crystal, fluorescent, solvatofluorochromic and electrochemical properties. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm15648b] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ryu MH, Choi JW, Kim HJ, Park N, Cho BK. Complementary Hydrogen Bonding Between a Clicked C3-Symmetric Triazole Derivative and Carboxylic Acids for Columnar Liquid-Crystalline Assemblies. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201101013] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Ryu MH, Choi JW, Kim HJ, Park N, Cho BK. Complementary Hydrogen Bonding Between a Clicked C3-Symmetric Triazole Derivative and Carboxylic Acids for Columnar Liquid-Crystalline Assemblies. Angew Chem Int Ed Engl 2011; 50:5737-40. [DOI: 10.1002/anie.201101013] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2011] [Revised: 03/28/2011] [Indexed: 11/09/2022]
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Vieira AA, Gallardo H, Barberá J, Romero P, Serrano JL, Sierra T. Luminescent columnar liquid crystals generated by self-assembly of 1,3,4-oxadiazole derivatives. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm04570e] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Canevet D, Pérez del Pino Á, Amabilino DB, Sallé M. Varied nanostructures from a single multifunctional molecular material. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm02302g] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Wang J, Liu C, Ding D, Zeng L, Cao Q, Zhang H, Zhao H, Li X, Xiang K, He Y, Wang G. Aggregation of an anionic porphyrin with chiral metal complexes and the competitive binding influences of a surfactant and a polyelectrolyte. NEW J CHEM 2011. [DOI: 10.1039/c1nj20193j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Barberá J, Lantero I, Moyano S, Serrano JL, Elduque A, Giménez R. Silver Pyrazolates as Coordination-Polymer Luminescent Metallomesogens. Chemistry 2010; 16:14545-53. [DOI: 10.1002/chem.201001766] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Saad A, Jeannin O, Fourmigué M. Helical organization of chiral binaphthyl tetrathiafulvalene primary amides through hydrogen bonding interactions. CrystEngComm 2010. [DOI: 10.1039/c004320f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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