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Otmakhova OA, Piryazev AA, Bondarenko GN, Shandryuk GA, Maryasevskaya AV, Merekalov AS, Ivanov DA, Talroze RV. New complexes of liquid crystal discotic triphenylenes: induction of the double gyroid phase. Phys Chem Chem Phys 2021; 23:16827-16836. [PMID: 34323895 DOI: 10.1039/d1cp00660f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electron donor-acceptor liquid crystals have been attracting considerable attention due to possible applications in optoelectronics and photonics. The creation of such charge transfer complexes is a powerful and flexible instrument for modifying the structures and properties compared to those of the initial components. In the present work, such an approach is exemplified on new complexes formed via non-covalent interactions of triphenylene discotics, namely, 2,3,6,7,10,11-hexakis(pentyloxy) triphenylene (H5T) and 2-(acryloyloxypropyloxy)-3,6,7,10,11-pentapentylox-triphenylene (TPh-3A), with an electron acceptor, β-(2,4,7-trinitro-9-fluorenylideneaminooxy) propionic acid (TNF-carb). The structure of thin supported films of H5T, TPh-3A and their blends with TNF-carb was investigated by grazing-incidence wide-angle X-ray scattering using a synchrotron source. At room temperature, the pristine discotics crystallize in orthorhombic unit cells whereas the self-assembly of H5T and TPh-3A with TNF-carb results in a double gyroid and hexagonal phases, respectively. Formation of the double gyroid phase with the lattice parameter of 36.5 Å is driven by phase separation between the aromatic and alkyl regions of the system. It is supposed that the TNF-carb molecules of the complex are positioned in the nodes of the structure while the H5T molecules are located in the struts adjoining the nodes via triple junctions. For the hexagonal crystal of the TPh-3A/TNF-carb complex, the acceptor molecules are likely located in the interstices between the neighboring supramolecular columns of TPh-3A. The molecular structures of the blends were also explored by means of FTIR spectroscopy. A detailed FTIR spectra analysis illustrates fine changes in inter-molecular bonds. For example, the initially dimerized acceptor molecules totally disappear in the complex structures whereas in TPh-3A/TNF-carb additional H-bonds between the carboxylate group in TNF-carb and the ester group of TPh-3A form. The experimental data allows putting forward possible molecular models of the complex structures.
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Affiliation(s)
- O A Otmakhova
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky prospect 29, 119991 Moscow, Russian Federation.
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Odarchenko Y, Defaux M, Rosenthal M, Akhkiamova A, Bovsunovskaya P, Melnikov A, Rodygin A, Rychkov A, Gerasimov K, Anokhin DV, Zhu X, Ivanov DA. One Methylene Group in the Side Chain Can Alter by 90 Degrees the Orientation of a Main-Chain Liquid Crystal on a Unidirectional Substrate. ACS Macro Lett 2018; 7:453-458. [PMID: 35619342 DOI: 10.1021/acsmacrolett.8b00044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The mechanisms of orientation of columnar liquid crystals (LCs) on a PTFE-rubbed surface are explored on a homologous series of symmetrically substituted poly(di-n-alkylsiloxanes) (PDAS). It is shown that by increasing the side-chain length in steps of one CH2 group, the orientation of PDAS switches back and forth from perpendicular to parallel with respect to PTFE chains. These changes are sensitive to the smallest possible variation of the macromolecular structure (i.e., modification of the side chain length by just one CH2 group) reflect the alteration of the alignment mechanism identified as graphoepitaxial or epitaxial for the perpendicular and parallel orientation, respectively. The results show that two orthogonal LC orientations are realizable on the same rubbed substrate, which can open new perspectives in the field of organic and printed electronics such as multidomain LCD technology.
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Affiliation(s)
- Yaroslav Odarchenko
- Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS UMR 7361 Jean Starcky, 15, F-68057 Mulhouse, France
| | - Matthieu Defaux
- Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS UMR 7361 Jean Starcky, 15, F-68057 Mulhouse, France
| | - Martin Rosenthal
- Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS UMR 7361 Jean Starcky, 15, F-68057 Mulhouse, France
| | - Azaliia Akhkiamova
- Lomonosov Moscow State University, Faculty of Fundamental Physical and Chemical Engineering, Leninskie Gory 1/51, 119991, Moscow, Russian Federation.,Moscow Institute of Physics and Technology (State University), Institutskiy per. 9, Dolgoprudny, 141700, Russian Federation
| | - Polina Bovsunovskaya
- Lomonosov Moscow State University, Faculty of Fundamental Physical and Chemical Engineering, Leninskie Gory 1/51, 119991, Moscow, Russian Federation.,Moscow Institute of Physics and Technology (State University), Institutskiy per. 9, Dolgoprudny, 141700, Russian Federation
| | - Alexey Melnikov
- Lomonosov Moscow State University, Faculty of Fundamental Physical and Chemical Engineering, Leninskie Gory 1/51, 119991, Moscow, Russian Federation.,Moscow Institute of Physics and Technology (State University), Institutskiy per. 9, Dolgoprudny, 141700, Russian Federation
| | - Alexander Rodygin
- Lomonosov Moscow State University, Faculty of Fundamental Physical and Chemical Engineering, Leninskie Gory 1/51, 119991, Moscow, Russian Federation.,Moscow Institute of Physics and Technology (State University), Institutskiy per. 9, Dolgoprudny, 141700, Russian Federation
| | - Andrey Rychkov
- Lomonosov Moscow State University, Faculty of Fundamental Physical and Chemical Engineering, Leninskie Gory 1/51, 119991, Moscow, Russian Federation.,Moscow Institute of Physics and Technology (State University), Institutskiy per. 9, Dolgoprudny, 141700, Russian Federation
| | - Kirill Gerasimov
- Lomonosov Moscow State University, Faculty of Fundamental Physical and Chemical Engineering, Leninskie Gory 1/51, 119991, Moscow, Russian Federation.,Moscow Institute of Physics and Technology (State University), Institutskiy per. 9, Dolgoprudny, 141700, Russian Federation
| | - Denis V Anokhin
- Lomonosov Moscow State University, Faculty of Fundamental Physical and Chemical Engineering, Leninskie Gory 1/51, 119991, Moscow, Russian Federation.,Moscow Institute of Physics and Technology (State University), Institutskiy per. 9, Dolgoprudny, 141700, Russian Federation.,Institute of Problems of Chemical Physics, Russian Academy of Sciences, Semenov Av. 1, Chernogolovka, Moscow region, 142432, Russian Federation
| | - Xiaomin Zhu
- DWI - Leibniz-Institute for Interactive Materials e.V. and Institute for Technical and Macromolecular Chemistry of RWTH Aachen University, Forkenbeckstr. 50, D-52056 Aachen, Germany
| | - Dimitri A Ivanov
- Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS UMR 7361 Jean Starcky, 15, F-68057 Mulhouse, France.,Lomonosov Moscow State University, Faculty of Fundamental Physical and Chemical Engineering, Leninskie Gory 1/51, 119991, Moscow, Russian Federation.,Moscow Institute of Physics and Technology (State University), Institutskiy per. 9, Dolgoprudny, 141700, Russian Federation
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Zhang B, Chen J, Zhang H, Baier MC, Mecking S, Reiter R, Mülhaupt R, Reiter G. Annealing-induced periodic patterns in solution grown polymer single crystals. RSC Adv 2015. [DOI: 10.1039/c4ra10563j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Faceted polymer single crystals have been transformed into periodically branched patterns by applying a slow annealing procedure.
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Affiliation(s)
- Bin Zhang
- Institute of Physics
- University of Freiburg
- 79104 Freiburg
- Germany
- Hermann Staudinger Graduate School
| | - Jingbo Chen
- School of Materials Science & Engineering
- Zhengzhou University
- Zhengzhou 450002
- People's Republic of China
| | - Hui Zhang
- Institute of Physics
- University of Freiburg
- 79104 Freiburg
- Germany
| | - Moritz C. Baier
- Chair of Chemical Materials Science
- Department of Chemistry
- University of Konstanz
- 78464 Konstanz
- Germany
| | - Stefan Mecking
- Chair of Chemical Materials Science
- Department of Chemistry
- University of Konstanz
- 78464 Konstanz
- Germany
| | - Renate Reiter
- Institute of Physics
- University of Freiburg
- 79104 Freiburg
- Germany
- Freiburg Materials Research Centre
| | - Rolf Mülhaupt
- Institute of Macromolecular Chemistry
- University of Freiburg
- 79104 Freiburg
- Germany
- Freiburg Materials Research Centre
| | - Günter Reiter
- Institute of Physics
- University of Freiburg
- 79104 Freiburg
- Germany
- Freiburg Materials Research Centre
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Defaux M, Vidal L, Möller M, Gearba RI, DiMasi E, Ivanov DA. Thin Films of a Main-Chain Columnar Liquid Crystal: Studies of Structure, Phase Transitions, and Alignment. Macromolecules 2009. [DOI: 10.1021/ma802666a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Matthieu Defaux
- Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS LRC 7228, Jean Starcky, 15, F-68057 Mulhouse, France; Deutsches Wollforschungsinstitut an der RWTH Aachen e.V., Pauwelsstr. 8, 52074 Aachen, Germany; Center for Functional Nanomaterials, Brookhaven National Laboratory, P.O. Box 5000, Upton, New York 11973; and National Synchrotron Light Source, Brookhaven National Laboratory, P.O. Box 5000, Upton, New York 11973
| | - Loïc Vidal
- Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS LRC 7228, Jean Starcky, 15, F-68057 Mulhouse, France; Deutsches Wollforschungsinstitut an der RWTH Aachen e.V., Pauwelsstr. 8, 52074 Aachen, Germany; Center for Functional Nanomaterials, Brookhaven National Laboratory, P.O. Box 5000, Upton, New York 11973; and National Synchrotron Light Source, Brookhaven National Laboratory, P.O. Box 5000, Upton, New York 11973
| | - Martin Möller
- Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS LRC 7228, Jean Starcky, 15, F-68057 Mulhouse, France; Deutsches Wollforschungsinstitut an der RWTH Aachen e.V., Pauwelsstr. 8, 52074 Aachen, Germany; Center for Functional Nanomaterials, Brookhaven National Laboratory, P.O. Box 5000, Upton, New York 11973; and National Synchrotron Light Source, Brookhaven National Laboratory, P.O. Box 5000, Upton, New York 11973
| | - Raluca I. Gearba
- Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS LRC 7228, Jean Starcky, 15, F-68057 Mulhouse, France; Deutsches Wollforschungsinstitut an der RWTH Aachen e.V., Pauwelsstr. 8, 52074 Aachen, Germany; Center for Functional Nanomaterials, Brookhaven National Laboratory, P.O. Box 5000, Upton, New York 11973; and National Synchrotron Light Source, Brookhaven National Laboratory, P.O. Box 5000, Upton, New York 11973
| | - Elaine DiMasi
- Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS LRC 7228, Jean Starcky, 15, F-68057 Mulhouse, France; Deutsches Wollforschungsinstitut an der RWTH Aachen e.V., Pauwelsstr. 8, 52074 Aachen, Germany; Center for Functional Nanomaterials, Brookhaven National Laboratory, P.O. Box 5000, Upton, New York 11973; and National Synchrotron Light Source, Brookhaven National Laboratory, P.O. Box 5000, Upton, New York 11973
| | - Dimitri A. Ivanov
- Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS LRC 7228, Jean Starcky, 15, F-68057 Mulhouse, France; Deutsches Wollforschungsinstitut an der RWTH Aachen e.V., Pauwelsstr. 8, 52074 Aachen, Germany; Center for Functional Nanomaterials, Brookhaven National Laboratory, P.O. Box 5000, Upton, New York 11973; and National Synchrotron Light Source, Brookhaven National Laboratory, P.O. Box 5000, Upton, New York 11973
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