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Artal, Manuela; Toyne, Kenneth J.; Goodby, John W.; Barberá, Joaquín; Photinos, Demetri J.

doi:10.1039/b105351p

Cited by 45 publications

(20 citation statements)

References 21 publications

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“…A related example was reported by Toyne, Goodby, and co‐workers (Scheme ) 287. 288 Only the octasubstituted board‐like mesogen 206 b forms columnar mesophases, while the tetrasubstituted analogue 206 a displays a soft crystal phase (Scheme ).…”

Section: Classes Of Compounds Used For Columnar Liquid Crystalsmentioning

confidence: 69%

Discotic Liquid Crystals: From Tailor‐Made Synthesis to Plastic Electronics

et al. 2007

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Most associate liquid crystals with their everyday use in laptop computers, mobile phones, digital cameras, and other electronic devices. However, in contrast to their rodlike (calamitic) counterparts, first described in 1907 by Vorländer, disklike (discotic, columnar) liquid crystals, which were discovered in 1977 by Chandrasekhar et al., offer further applications as a result of their orientation in the columnar mesophase, making them ideal candidates for molecular wires in various optical and electronic devices such as photocopiers, laser printers, photovoltaic cells, light-emitting diodes, field-effect transistors, and holographic data storage. Beginning with an overview of the various mesophases and characterization methods, this Review will focus on the major classes of columnar mesogens rather than presenting a library of columnar liquid crystals. Emphasis will be given to efficient synthetic procedures, and relevant mesomorphic and physical properties. Finally, some applications and perspectives in materials science and molecular electronics will be discussed.

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Section: Classes Of Compounds Used For Columnar Liquid Crystalsmentioning

confidence: 69%

Discotic Liquid Crystals: From Tailor‐Made Synthesis to Plastic Electronics

et al. 2007

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“…All the intermediates,a nd the target compounds have been fully characterized by NMR spectroscopy (Figures S1-S14 in the Supporting Information) and HRMS (Figures S15-S21 in the Supporting Information), and the resultsa re in good agreement with the chemical structures.N op ositional isomers were observed, otherwise different from the reportedp henomena. [48] Molecularc onformation and aggregation in organic solvents Polycyclic aromatic hydrocarbons usually tend to aggregate in organic solvents as ar esult of strong intermoleculari nteractions, which depend essentially on the size and planarity of the aromatic core. The synthesized fused-thiophened iscotic compounds described here possess these features and therefore were expectedt os trongly aggregate in solution.…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

Board‐like Fused‐Thiophene Liquid Crystals and their Benzene Analogs: Facile Synthesis, Self‐Assembly, p‐Type Semiconductivity, and Photoluminescence

Zhao

Wang

et al. 2019

Chemistry An Asian Journal

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Fused-thiophene discotic liquid crystals were designed and easily synthesized by Suzukic oupling and FeCl 3 oxidized tandemc yclodehydrogenation reactions, including homo-andcross-coupling reactions. The resultingh exagonal and rectangular columnar mesomorphic supramolecular structures formed werec haracterized by polarizing optical microscopy,d ifferential scanning calorimetry,a nd smallangle X-ray scattering. The charge carrier transport proper-ties in the mesophases of two of the synthesized fused-thiophene discogensw ere measured by transient photocurrent time-of-flight (TOF) technique, revealing fast hole transport values in the range of 10 À3 to 10 À2 cm 2 V À1 s À1 ,t hus demonstratingp otentiala pplications in electronic devices.T he luminescent sanidic mesogens, with different extended p-conjugated systems, also emitb lue, green, or red light,w ith absolute photoluminescent quantum yields as high as 18 %.

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“…To a solution of 2 (2 g, 2.99 mmol) and 11a (845 mg, 2.99 mmol) in THF (15 mL) and piperidine (7 mL), PPh 3 (30 mg), CuI (15 mg) and (Ph 3 P) 2 …”

Section: -[(2-docosyloxymentioning

confidence: 99%

“…However, despite researchers trying to make this prediction real, the discovery of a Nb phase in thermotropic liquid crystals has remained elusive [2]. Functional shape persistent macrocycles with defined structures play a special role in supramolecular chemistry [3].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of arylenealkyne conjugated macrocycles containing a long alkylene bridge

Cheng

Hoeger

2008

Front. Chem. China

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The synthesis of the first two arylenealkyne conjugated macrocycles containing a long alkylene bridge via Glaser coupling of template-directed tetraacetylenes was reported. Tetraacetylene intermediates with complex structures were constructed rapidly via quadruple Hagihara coupling of monoprotected bisacetylenes to appropriate tetraiodides and subsequent desilylation. The characterization of such compounds was carried out by NMR, GPC and UV-Vis spectra. Unfortunately, the two compounds were not liquid crystals and had no biaxial nematic mesophase character as expected.

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Untitled

Cited by 45 publications

References 21 publications

Discotic Liquid Crystals: From Tailor‐Made Synthesis to Plastic Electronics

Discotic Liquid Crystals: From Tailor‐Made Synthesis to Plastic Electronics

Board‐like Fused‐Thiophene Liquid Crystals and their Benzene Analogs: Facile Synthesis, Self‐Assembly, p‐Type Semiconductivity, and Photoluminescence

Synthesis of arylenealkyne conjugated macrocycles containing a long alkylene bridge

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