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Huang TH, Yang H, Yang G, Zhu SL, Zhang CL. Synthesis, structural characterization and photoluminescent properties of copper(I) coordination polymers with extended C–H⋯π and CN⋯π interactions. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.10.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Symmetric quinoxaline–oxadiazole conjugates: mesogenic behavior via quinoxaline–CH interactions. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.09.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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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: 9] [Impact Index Per Article: 1.1] [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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Lin KT, Lee GH, Lai CK. Mesogenic heterocycles formed by bis-pyrazoles and bis-1,3,4-oxadiazoles. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.04.055] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Heterocyclic 3,5-disubstituted phenylpyrazoles and isoxazoles: synthesis and mesomorphic behavior. Tetrahedron 2013. [DOI: 10.1016/j.tet.2012.11.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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