59100-35-5Relevant academic research and scientific papers
Interfacial chemistry on carboxylate-functionalized monolayer assemblies
Gershevitz, Olga,Osnis, Alina,Sukenik, Chaim N.
, p. 321 - 336 (2005)
Deposition of trichlorosilanes with ester groups at their remote termini provides a convenient entry to carboxylic acid-bearing siloxane-anchored self-assembled monolayers. The de-esterification of these esters has been optimized to minimize monolayer dam
Structure-properties relationships in liquid crystal thiols
Cseh, Liliana,Mehl, Georg
, p. 879 - 885 (2014/08/18)
Two new series of thiols were studied in order to establish the structure-properties relationships. First series consists of compounds with three or four aromatic rings as rigid part of mesogen and the second contains thiols with a flexible chain attached
Vinyl-terminated liquid-crystalline dendrimers based on dendritic polyols and their siloxane-based elastomers
Lin, Yuteng,Sun, Jianzhong
, p. 71 - 83 (2013/01/16)
A new series of side-chain liquid-crystalline dendrimers (LCDs) by grafting vinyl-terminated phenyl benzoate-based promesogens to a novel polypropyleneimine-derived dendritic polyols are reported. Polarized optical microscopy and X-ray diffraction studies
BENT-CORE LC DECORATED GOLD NANOCLUSTERS
-
, (2011/04/18)
Novel thiol-terminated bent-core liquid crystals (LCs) are used to decorate gold nanoparticles. Thioacetate or xanthate/xanthogenate functional groups are used to effect the attachment of the LCs to the gold nanoparticles. Such bent-core decorated nanoparticles may be dissolved in bent-core liquid crystal host media to provide polarizable systems which respond quickly to applied electric fields and exhibit other interesting and useful optical and electro-optic behaviour.
27- To 39-membered pyridine macrocycles
Luening, Ulrich,Mak, Ellen,Zindler, Melanie,Hartkopf, Britta,Herges, Rainer
experimental part, p. 4932 - 4940 (2010/11/04)
A set of 27- to 39-membered pyridine macrocycles 2 and 3 has been synthesized by Williamson ether synthesis or ringclosing metathesis. The pyridines are 2,6-disubstituted to al-low endo interactions. In addition to the length, also the nature of the aliphatic chain was varied: saturated (2) and unsaturated (3).
Bent-core liquid crystal (LC) decorated gold nanoclusters: Synthesis, self-assembly, and effects in mixtures with bent-core LC hosts
Marx, Vanessa M.,Girgis, Hidy,Heiney, Paul A.,Hegmann, Torsten
supporting information; experimental part, p. 2983 - 2994 (2010/02/27)
We present the first synthesis of a series of thiol-, thioacetate-, and xanthate-terminated bent-core derivatives, as well as the preparation of gold nanoclusters using the thiol-terminated bent-core compounds. The mesomorphic properties of the bent-core compounds have been investigated by polarizing optical microscopy (POM), differential scanning calorimetry (DSC), small angle X-ray scattering (SAXS), and electro-optic tests. From this series, the mono-xanthate derivatives form rectangular or hexagonal columnar phases, and the mono-thiol derivative with shorter alkyl chains forms a metastable, likely smectic, phase. All other bent-core compounds and intermediates exclusively form disordered or multi-layer lamellar crystalline solid modifications. High-resolution transmission electron microscopy (HR-TEM) images of the bent-core functionalized gold nanoclusters prepared from the thiol-terminated derivatives, taken after slow evaporation of the solvent, provide evidence for the formation of self-assembled nanocluster arrays. Upon dispersion of these gold nanoclusters in two structurally related bent-core LC hosts (one forming a SmCPA, and the second with a terminal double bond displaying a Colr phase), a shift in the surface plasmon resonance was observed indicating a LC host-dependent aggregation of the nanoparticles. Finally, we report initial results on the effects of different concentrations of these nanoclusters on the thermal properties as well as the applied voltage/current response of the parent SmCPA host.
Bent-core systems based on [1,3,4]oxadiazole core with shape biaxiality
Apreutesei, Daniela,Mehl, Georg H.
experimental part, p. 527 - 533 (2009/12/24)
The present paper is presenting the Synthesis and characterization of new [1,3,4]oxadiazole derivatives obtained by attaching different mesogenic units to the central core. Liquid crystals properties analysis by POM and DSC techniques is presented and structure-properties correlations are discussed.
Thermal behaviour and mesophase structure of cyclic oligosiloxanes with chiral mesogenic groups
Soltysiak, Joanna T.,Bialecka-Florjanczyk, Ewa,Kowalczyk, Ewa,Przedmojski, Jan
, p. 217/[1259]-230/[1272] (2007/10/03)
Chiral, smectogenic pendant groups have been covalently attached to cyclic oligosiloxanes by hydrosilylation. Differential scanning calorimetry, optical polarising microscopy, and X-ray diffraction measurements reveal liquid crystalline properties for all
Synthesis and characterization of tris-methacrylated 3,4,5- tris[(alkoxy)benzyloxy]benzoate derivatives
Beginn, Uwe,Zipp, Gabriela,Moeller, Martin
, p. 2016 - 2023 (2007/10/03)
The synthesis of liquid crystalline 3,4,5-tris(11-methacryloylundecyl-1- oxybenzyloxy)benzoic acid, 2-methyl-(1,4,7,10,13-pentaoxacyclopentadecane)- 3,4,5-tris[4-(11-methacryloylundecyl-1-oxy)benzyloxy] benzoate and its 1:1 complex with sodium triflate is described. The observed mesophases were identified, by polarized optical microscopy and contact preparation techniques, to be of hexagonal columnar disordered structure. The amphiphiles form lyotropic columnar phases in concentrated methacrylate solvents, while at low solute contents supramolecular organogels emerge.
Ferroelectric Liquid Crystals. Part 3. Achiral Phenyl Benzoates Incorporating a trans-4-Pentylcyclohexyl Moiety
Kelly, Stephen M.,Buchecker, Richard
, p. 461 - 466 (2007/10/02)
About twenty substituted phenyl benzoates incorporating a trans-4- pentylcyclohexyl moiety have been synthesised.The synthesis, liquid-crystal transition temperatures, and enthalpies of fusion are reported.The effect of variations chainlength and central
