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Original Articles

New disc-shaped mesogens based on pentakis(phenylethynyl)benzene derivatives

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Pages 247-253 | Received 18 Aug 1992, Accepted 14 Sep 1992, Published online: 24 Sep 2006

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Ashraf M. Ashmawy, El-Sayed M. Elnaggar, Manal G. Mohamed & Mohamed C. Hamam. (2022) Preparation and evaluation of new liquid crystal compounds as flow improvers for waxy crude oil. Journal of Dispersion Science and Technology 43:2, pages 206-220.
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Ashraf M. Ashmawy, Bo Yao, Manal G. Mohamed, El- Sayed M. Elnaggar, Salah M. El-Bahy & Mohamed F. Hamam. (2021) Allyl ester-based liquid crystal flow improvers for waxy crude oils. Journal of Dispersion Science and Technology 42:14, pages 2199-2209.
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Jens Buchs, André Geßner, Benjamin Heyne, Dietmar Janietz & Hans Sawade. (2019) Fluorescent liquid crystals with rod-shaped π-conjugated hydrocarbon core. Liquid Crystals 46:2, pages 281-298.
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Shilpa Setia, Sumyra Sidiq, Joydip De, Ipsita Pani & Santanu Kumar Pal. (2016) Applications of liquid crystals in biosensing and organic light-emitting devices: future aspects. Liquid Crystals 43:13-15, pages 2009-2050.
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Seiichi Furumi, Dietmar Janietz, Masatoshi Kidowaki, Masaru Nakagawa, Shinya Morino, Joachim Stumpe & Kunihiro Ichimura. (2001) Surface-Assisted Orientational Control of Discotic Liquid Crystals by Light. Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 368:1, pages 517-524.
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Daisuke Suzuki & Naoyuki Koide. (2001) Synthesis and Characterization of Biphenylethynylbenzene Type Discotic Liquid Crystal. Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 364:1, pages 635-645.
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S. MAHLSTEDT, D. JANIETZ, C. SCHMIDT, A. STRACKE & J. H. WENDORFF. (1999) Novel donor-acceptor triple mesogens incorporating disc-like and rod-like molecular sub-units. Liquid Crystals 26:9, pages 1359-1369.
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R. Macdonald, P. Meindl & S. Busch. (1999) Highly Sensitive Photoelectrical Reorientation of Nematic Liquid Crystals. Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 331:1, pages 483-490.
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R. Macdonald, P. Meindl, G. Chilaya & D. Sikharulidze. (1998) Reorientation of a Nematic Liquid Crystal of Discotic Molecules by Photoinduced Space Charge Fields. Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 320:1, pages 115-126.
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D. GOLDMANN, S. MAHLSTEDT & D. JANIETZ. (1998) Mesomorphic donor-acceptor twin molecules with covalently linked sheet-like pentaalkyne and nitrofluorenone sub-units. Liquid Crystals 24:6, pages 881-890.
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D. Janietz, R. Festag, C. Schmidt & J.H. Wendorff. (1996) Oligomeric 1,3,5-triazines containing disc-shaped penta-alkyne and triphenylene side groups. Liquid Crystals 20:4, pages 459-467.
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N. Usol'tseva, K. Praefcke, D. Singer & B. Gündogan. (1994) Lyotropic phase behaviour of disc-shaped tetra-palladium organyls in apolar organic solvents [1]. Liquid Crystals 16:4, pages 601-616.
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K. Praefcke, D. Singer & A. Eckert. (1994) Induction of nematic cholesteric (N∗) phases by charge transfer complexation of disc-shaped multiynes [1]. Liquid Crystals 16:1, pages 53-65.
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Monika Gupta, Indu Bala & Santanu Kumar Pal. (2014) A room temperature discotic mesogenic dyad based-on triphenylene and pentaalkynylbenzene. Tetrahedron Letters 55:42, pages 5836-5840.
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Andrew N. Cammidge & Hemant Gopee. 2014. Handbook of Liquid Crystals. Handbook of Liquid Crystals 1 42 .
Anindita DasSuhrit Ghosh. (2014) Supramolecular Assemblies by Charge‐Transfer Interactions between Donor and Acceptor Chromophores. Angewandte Chemie International Edition 53:8, pages 2038-2054.
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Anindita DasSuhrit Ghosh. (2014) Supramolekulare Anordnungen mit Charge‐Transfer‐Wechselwirkungen zwischen Donor‐ und Akzeptor‐Chromophoren. Angewandte Chemie 126:8, pages 2068-2084.
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Hari Krishna Bisoyi & Sandeep Kumar. (2010) Discotic nematic liquid crystals: science and technology. Chem. Soc. Rev. 39:1, pages 264-285.
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Satyam Kumar Gupta, V. A. Raghunathan, V. Lakshminarayanan & Sandeep Kumar. (2009) Novel Benzene-Bridged Triphenylene-Based Discotic Dyads. The Journal of Physical Chemistry B 113:39, pages 12887-12895.
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S.‐C. Chien, H.‐H. Chen, H.‐C. Chen, Y.‐L. Yang, H.‐F. Hsu, T.‐L. Shih & J.‐J. Lee. (2007) Stable, Low‐Temperature Discotic Nematic Superstructures by Incorporating a Laterally Substituted Sidearm in Hexakis(phenylethynyl)benzene Discogens. Advanced Functional Materials 17:12, pages 1896-1902.
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Annett Grafe, Dietmar Janietz, Thomas Frese & Joachim H. Wendorff. (2005) Star-Shaped Discotic Oligomesogens Based on Radial Pentakisphenylethynylbenzene Moieties. Chemistry of Materials 17:20, pages 4979-4984.
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Marcel W. C. P. Franse, Klaas te Nijenhuis, Jan Groenewold & Stephen J. Picken. (2004) Cross-Linking Behavior of Diskotic Side-Chain Polymers in Solution. Macromolecules 37:20, pages 7839-7845.
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Duncan W. Bruce. (2004) Towards the biaxial nematic phase through molecular design. The Chemical Record 4:1, pages 10-22.
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Jonathan J. Hunt, Richard W. Date, Bakir A. Timimi, Geoffrey R. Luckhurst & Duncan W. Bruce. (2001) Toward the Biaxial Nematic Phase of Low Molar Mass Thermotropic Mesogens:  Substantial Molecular Biaxiality in Covalently Linked Rod−Disk Dimers. Journal of the American Chemical Society 123:41, pages 10115-10116.
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Seiichi Furumi, Dietmar Janietz, Masatoshi Kidowaki, Masaru Nakagawa, Shin'ya Morino, Joachim Stumpe & Kunihiro Ichimura. (2001) Polarized Photoluminescence from Photopatterned Discotic Liquid Crystal Films. Chemistry of Materials 13:5, pages 1434-1437.
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Dietmar Janietz. 2001. Handbook of Surfaces and Interfaces of Materials. Handbook of Surfaces and Interfaces of Materials 423 446 .
Paul H. J. Kouwer, Wolter F. Jager, Wim J. Mijs & Stephen J. Picken. (2000) Synthesis and Characterization of a Novel Liquid Crystalline Polymer Showing a Nematic Columnar to Nematic Discotic Phase Transition. Macromolecules 33:12, pages 4336-4342.
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R. MACDONALD, P. MEINDL & S. BUSCH. (2012) THE PHOTOELECTRICAL REORIENTATION EFFECT IN NEMATIC LIQUID CRYSTALS. Journal of Nonlinear Optical Physics & Materials 08:03, pages 379-388.
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Dietmar Janietz, Stefan Katholy & Ludwig Brehmer. (1998) Monolayer properties of amphiphilic tetrakis(phenylethynyl)benzene compounds. Thin Solid Films 327-329, pages 74-77.
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R. Macdonald, P. Meindl, G. Chilaya & D. Sikharulidze. (1998) Photo-excitation of space charge fields and reorientation of a nematic liquid crystal of discotic molecules. Optics Communications 150:1-6, pages 195-200.
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D. Demus, J. Goodby, G. W. Gray, H.‐W. Spiess & V. VillKlaus Praefcke & Dirk Singer. 1998. Handbook of Liquid Crystals. Handbook of Liquid Crystals 945 967 .
Klaus Praefcke & Dirk Singer. 1998. Handbook of Liquid Crystals Set. Handbook of Liquid Crystals Set 945 967 .
R. Macdonald & P. Meindl. (1998) A new photoelectric reorientation effect for the realization of highly sensitive photorefraction in liquid crystals. A new photoelectric reorientation effect for the realization of highly sensitive photorefraction in liquid crystals.
Dietmar Janietz, Stefan Katholy, Birgit Dietzel & Ludwig Brehmer. (1997) Monolayer Behavior of 2-Fold Hydroxy-Terminated Sheetlike Tetrakis(phenylethynyl)benzene Derivatives. Langmuir 13:26, pages 7217-7222.
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Dietmar Janietz, Ramesh C. Ahuja & Dietmar Möbius. (1997) Langmuir Monolayers of Sheet-Shaped Multialkyne Amphiphiles. Langmuir 13:2, pages 305-309.
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Sylvie Marguet, Arnaud Germain & Philippe Millie. (1996) Electronic states of multichromophoric phenylethynylbenzene derivatives: exciton theory and CS-INDO-CIPSI calculations. Chemical Physics 208:3, pages 351-373.
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Christopher J. Booth, Daniel Krüerke & Gerd Heppke. (1996) Highly twisting enantiomeric radial multiyne dopants for discotic liquid-crystalline systems. J. Mater. Chem. 6:6, pages 927-934.
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Dietmar Janietz. (1996) Covalently linked donor–acceptor mesogens based on disc-shaped penta-alkynes. Chem. Commun.:6, pages 713-714.
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Klaus Praefcke & John D. Holbrey. (1996) Inclusions between large flat organic molecules; the induction of columns and mesophases. Journal of Inclusion Phenomena and Molecular Recognition in Chemistry 24:1-2, pages 19-41.
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A. Jutila, Dietmar Janietz, Jürgen Reiche & Helge Lemmetyinen. (1995) Photophysical investigation of Langmuir-Blodgett films of amphiphilic discotic penta-alkynes. Thin Solid Films 268:1-2, pages 121-129.
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Radoslav Ionov & Angelina Angelova. (1995) Comment on “Molecular organization of amphiphilic disc-shaped penta-alkynes in LB mono- and multilayers”, D. Janietz, D. Hofmann and J. Reiche, Thin Solid Films, 244 (1994) 794. Thin Solid Films 266:2, pages 99-101.
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D. Janietz, D. Hofmann & J. Reiche. (1995) Reply to comment on “molecular organization of amphiphilic disc-shaped penta-alkynes in LB mono- and multilayers”. Thin Solid Films 266:2, pages 102-105.
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Radoslav Ionov & Angelina Angelova. (1995) Evidence for a discotic smectic-nematic phase induced in Langmuir-Blodgett films. Physical Review E 52:1, pages R21-R24.
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J. Reiche, D. Janietz, T. Baberka, D. Hofmann & L. Brehmer. (1995) Comprehensive structure investigation of Langmuir Blodgett films of disc-shaped molecules. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 97:1-4, pages 416-419.
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Michael Langner, Klaus Praefcke, Daniel Krüerke & Gerd Heppke. (1995) Chiral radial pentaynes exhibiting cholesteric discotic phases. J. Mater. Chem. 5:4, pages 693-699.
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Klaus Praefcke, Belkiz Bilgin, Joachim Pickardt & Marina Borowski. (2006) Liquid‐crystalline Compounds, 86. The First Disc‐Shaped Dinuclear Platinum Mesogen. Chemische Berichte 127:8, pages 1543-1545.
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D. Janietz, D. Hofmann & J. Reiche. (1994) Molecular organization of amphiphilic disc-shaped penta-alkynes in LB-mono- and multilayers. Thin Solid Films 244:1-2, pages 794-798.
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A. Angelova, J. Reiche, R. Ionov, D. Janietz & L. Brehmer. (1994) Control of the structure of Langmuir-Blodgett films of a discotic liquid crystalline compound via the subphase composition and the adjacent molecular environment. Thin Solid Films 242:1-2, pages 289-294.
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K. Praefcke, D. Singer, B. Gündogan, K. Gutbier & M. Langner. (2010) Columnare und nematische Phasen neuer makrodiscotischer Materialien [1]. Berichte der Bunsengesellschaft für physikalische Chemie 98:1, pages 118-122.
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K. Praefcke, D. Singer, B. Gündogan, K. Gutbier & M. Langner. (2010) Columnare und nematische Phasen neuer makrodiscotischer Materialien [1]. Berichte der Bunsengesellschaft für physikalische Chemie 97:10, pages 1358-1361.
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