Intermolecular organization of triphenylene-based discotic mesogens by interdigitation of alkyl chains

Allen, Matthew T.; Harris, Kenneth D. M.; Kariuki, Benson M.; Kumari, Niraj; Preece, Jon A.; Lose, D.; Hegmann, Torsten; Tschierske, C.

doi:10.1080/026782900202561

Cited by 27 publications

(14 citation statements)

References 12 publications

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“…The sharp peak indicates a well ordered film. The d spacing ob-tained is similar to the mesophase d spacing 26 corresponding to the intercolumnar separation ͑d100͒, which implies that the molecules are ordered perpendicularly on the surface as shown in the inset to Fig. 2.…”

Section: Resultssupporting

confidence: 55%

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Polysubstituted derivatives of triphenylene as high resolution electron beam resists for nanolithography

Robinson

Palmer

Tada³

et al. 2000

Journal of Vacuum Science &Amp; Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena

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We have explored the application of polysubstituted derivatives of triphenylene as high resolution, high etch durability electron beam resists. Room temperature spin coating was used to produce films of the derivatives on silicon substrates. Exposure to a 20 keV electron beam was found to alter the dissolution rate of these derivatives in various organic solvents. Doses of between ∼3×10−4 and ∼2.5×10−3 C/cm2 substantially increased the solubility of the derivative hexapentyloxytriphenylene in polar solvents (positive tone behavior). Doses greater than ∼2.5×10−3 C/cm2 led to a decrease in solubility in both polar and nonpolar solvents (negative tone behavior). Other derivatives also demonstrated a reduction in their dissolution rate for doses between ∼1.5×10−3 and ∼6.5×10−3 C/cm2. The etch durabilities of the positive and negative tone patterns were found to be, respectively, ∼25% less and ∼70% greater than that of a conventional novolac based negative tone resist. Line and space patterns were defined in one of the resists with a resolution of ∼14 nm and structures with an aspect ratio of ∼50–1 were etched into silicon.

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Section: Resultssupporting

confidence: 55%

“…1͑b͒, were also studied. All of the derivatives bar C5/C0, C5/C1, C5/C2, and C5/C5COOH have previously been shown 26 to be liquid crystalline.…”

Section: Resultsmentioning

confidence: 99%

Polysubstituted derivatives of triphenylene as high resolution electron beam resists for nanolithography

Robinson

Palmer

Tada³

et al. 2000

Journal of Vacuum Science &Amp; Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena

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“…Compounds F1H-F6H6 were synthesized according to methods described in the literature [19][20][21][22]. The phase …”

Section: Compoundsmentioning

confidence: 99%

Alignment behaviour of symmetrical and asymmetrical triphenylenes possessing fluoroalkylated side chains on modified substrates

Terasawa

Monobe

2007

Liquid Crystals

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“…In triphenylene based material design, peripheral sulfur atom promoted molecular self assembly, 11 hydrophilic and hydrophobic effect, 12 fluorophilic effect of perfluoroalkyl chain, [13][14][15] hydrogen bonding, 16 asymmetrical substitution, [17][18][19][20][21][22][23] electronic donor acceptor interaction, 24,25 complimentary polytopic interaction, 26,27 and arene perfluoroarene interaction 28 have been exploited for improving mesophase range, order of mesophase, and alignment behavior of discogens.…”

Section: Introductionmentioning

confidence: 99%

New Triphenylene Based Discotic Liquid Crystals with Mixed Tails: Molecular Symmetry and Wide Columnar Mesophase Range

Zhao

Wang

et al. 2006

Chin. J. Chem.

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A series of new trialkoxytrialkanoyloxytriphenylene TP(OC n H 2n＋1 ) 3 (OCOC m H 2m＋1 ) 3 (5a-5e) (n＝m＋1＝4-8) discotic liquid crystals were prepared and their mesomorphic properties were investigated using differential scanning calorimetry (DSC) and polarizing optical microscopy (POM). The symmetrical and shorter chain triphenylenes display higher melting points and clearing points, more highly ordered and stable columnar mesophase than the asymmetrical and longer chain triphenylenes respectively.

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Intermolecular organization of triphenylene-based discotic mesogens by interdigitation of alkyl chains

Cited by 27 publications

References 12 publications

Polysubstituted derivatives of triphenylene as high resolution electron beam resists for nanolithography

Polysubstituted derivatives of triphenylene as high resolution electron beam resists for nanolithography

Alignment behaviour of symmetrical and asymmetrical triphenylenes possessing fluoroalkylated side chains on modified substrates

New Triphenylene Based Discotic Liquid Crystals with Mixed Tails: Molecular Symmetry and Wide Columnar Mesophase Range

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