Untersuchungen zur Bildung von Flüssigkristallen bei Distyrylbenzolen mit Alkoxyketten / Investigations on the Formation of Liquid Crystals by Distyrylbenzenes with Alkoxy Chains

Meier, Herbert; Prass, E.; Zerban, Georg; Kosteyn, F.

doi:10.1515/znb-1988-0715

Cited by 37 publications

(21 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the subsequent step the benzoyl chlorides 6-n were used without further purification. Amidation [20] of 3-m with 6-n in refluxing pyridine yielded 7-m/n (72 ± 81 % yield after recrystallization from isopropanol). was methylated with CH 3 I in anhydrous THF by using a suspension of NaH as base and a catalytic amount of DMSO to yield 8-12/18 in 78 % yield after recrystallization from isopropyl alcohol.…”

Section: Resultsmentioning

confidence: 99%

Coassembly of a Hexagonal Columnar Liquid Crystalline Superlattice from Polymer(s) Coated with a Three-Cylindrical Bundle Supramolecular Dendrimer

et al. 1999

View full text Add to dashboard Cite

Abstract:The synthesis and structural analysis of a polymer containing twindendritic benzamide side-groups (i.e. poly{N-[3,4-bis(n-dodecan-1-yloxy)-5-(1-methacryloyl-n-undecan-1-yloxy)-phenyl]-3,4,5-tris(n-dodecan-1-yloxy)-benzamide}) (19) are described. The disc-like side groups of this polymer self-assemble into supramolecular cylindrical dendrimers through hydrogen bonding acting along the column long axis, creating a novel architecture consisting of a polymer chain(s) coated with a three-cylindrical bundle supramolecular dendrimer. This polymer self-organizes in a thermotropic nematic liquid crystalline (LC) phase. The low molar mass twin dendritic benzamide, 7-12/12, which has a similar structure to that of the polymer side groups, self-assembles into supramolecular cylindrical dendrimers, which self-organize on a twodimensional hexagonal columnar (F h ) LC lattice. Coassembly of the polymer 19 with 7-12/12 produces a novel twodimensional F h LC superlattice. The mechanism responsible for this coassembly provides access to libraries of functional two-dimensionl F h superlattices.

show abstract

Section: Resultsmentioning

confidence: 99%

Coassembly of a Hexagonal Columnar Liquid Crystalline Superlattice from Polymer(s) Coated with a Three-Cylindrical Bundle Supramolecular Dendrimer

et al. 1999

View full text Add to dashboard Cite

show abstract

“…CTV(OH) 3 was prepared in three steps from vanillyl alcohol according to the procedure described by A. Collet and co-workers. [12] Treatment of CTV(OH) 3 with 3,4,5-tridodecyloxybenzoyl chloride [13] (3) in the presence of 4-dimethylaminopyridine (DMAP) and NEt 3 in dry toluene afforded compound 1 in 76 % yield. CTV derivative 2 was prepared under similar conditions by reaction of commercially available CTV(OH) 6 with acid chloride 3.…”

Section: Resultsmentioning

confidence: 99%

“…Toluene was distilled over sodium and benzophenone. Compounds 3,4,5-tridodecyloxybenzoyl chloride (3) [13] and CTV(OH) 3 [12] were prepared as previously reported. All reactions were performed in standard glassware under an inert Ar atmosphere.…”

Section: Methodsmentioning

confidence: 99%

A Liquid Crystalline Supramolecular Complex of C60 with a Cyclotriveratrylene Derivative

Felder¹,

Heinrich²,

Guillon³

et al. 2000

Chem. Eur. J.

100

View full text Add to dashboard Cite

Cyclotriveratrylene (CTV) derivatives substituted with 9 (1) or 18 (2) long alkyl chains have been prepared. Whereas no liquid crystalline behavior has been observed for 1, the CTV derivative 2 has mesomorphic properties. Indeed, at room temperature compound 2 exhibits a nematic phase characterized by cybotactic groups with a local lamello-columnar order. Both CTV derivatives 1 and 2 are able to form supramolecular complexes with C60 in the solid state. In both cases, the 2:1 host-guest species have been obtained as brown compounds. No liquid crystalline behavior was observed for the supramolecular complex [C60 is included in (1)2]. In contrast, observation of the brown product obtained from C60 and the CTV derivative 2 directly after preparation by polarized optical microscopy revealed a fluid birefringent phase at room temperature. When the sample is heated above 70 degrees C, the birefringence of the texture under the microscope disappears and the X-ray diffraction pattern is transformed into a pattern characteristic of a cubic phase. For the first time in thermotropic liquid crystals, the space group of this cubic phase can be assigned as I4(1)32.

show abstract

“…Aldehyde 2d [14] and 1 yielded 83% of 3d (1.99 g from 1.0 g 1) as colorless crystals, m.p. 75°C (CHCl 3 / C 2 H 5 OH).…”

Section: All-(e)-tetrakis(4-{2-[34-bis(dodecyloxy)phenyl]vinyl}phenymentioning

confidence: 99%

Synthesis of Tetrastilbenylmethanes by Wittig−Horner Reactions

2004

Self Cite

View full text Add to dashboard Cite

show abstract

Untersuchungen zur Bildung von Flüssigkristallen bei Distyrylbenzolen mit Alkoxyketten / Investigations on the Formation of Liquid Crystals by Distyrylbenzenes with Alkoxy Chains

Cited by 37 publications

References 5 publications

Coassembly of a Hexagonal Columnar Liquid Crystalline Superlattice from Polymer(s) Coated with a Three-Cylindrical Bundle Supramolecular Dendrimer

Coassembly of a Hexagonal Columnar Liquid Crystalline Superlattice from Polymer(s) Coated with a Three-Cylindrical Bundle Supramolecular Dendrimer

A Liquid Crystalline Supramolecular Complex of C60 with a Cyclotriveratrylene Derivative

Synthesis of Tetrastilbenylmethanes by Wittig−Horner Reactions

Contact Info

Product

Resources

About