Synthesis and characterization of new H-shaped triphenylene discotic room-temperature liquid crystal tetramers by a copper-free click reaction

2018 ◽  
Vol 42 (1) ◽  
pp. 272-280 ◽  
Author(s):  
Kan Zhang ◽  
Yuefeng Bai ◽  
Chun Feng ◽  
Guanghui Ning ◽  
Hailiang Ni ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Room Temperature ◽  
Click Reaction ◽  
Cycloaddition Reaction ◽  
Synthesis And Characterization ◽  
Discotic Liquid Crystal ◽  
Temperature Liquid

A series of new H-shaped triphenylene discotic liquid crystal tetramers has been designed and synthesized using a copper-free [3+2] cycloaddition reaction.

Synthesis and Properties of Functionalized Sulfur-Containing Hexa-Peri-Hexabenzocoronene

2015 ◽  
Vol 1088 ◽  
pp. 290-294
Author(s):  
Ying Wang ◽  
Wen Guang Wang ◽  
Rui Cheng ◽  
Jia Ling Pu
Keyword(s):  
Thermal Properties ◽  
Liquid Crystal ◽  
Absorption Spectra ◽  
Synthesis And Characterization ◽  
Discotic Liquid Crystal ◽  
Matrix Surface ◽  
Sulfur Containing ◽  
Columnar Spacing

Synthesis and characterization of a novel hexabenzocoronene (HBC) derivative attached with four alkyl swallow-tailed chains and two sulfur-containing chains are described. The designed peripheral decoration with dove tails as solubilizer and sulfur-containing groups as functionalizer is expected to improve the solubility of molecules, change the columnar spacing stacks and make for its orientation on matrix surface. Its UV−vis absorption spectra appeared in 350-400 nm region as same as typical that of this kind of compounds. The thermal properties as discotic liquid crystal and its orientation on matrix are being studied.

Synthesis and Mesomorphism of Rigid Bridge Triphenylene Discotic Liquid Crystal Dimers

2010 ◽  
Vol 428-429 ◽  
pp. 41-45
Author(s):  
Hui Zhou ◽  
Wen Hao Yu ◽  
Bi Qin Wang ◽  
Ping Hu ◽  
Ke Qing Zhao
Keyword(s):  
Liquid Crystal ◽  
Room Temperature ◽  
Alkyl Chain ◽  
Scanning Calorimetry ◽  
Polarized Optical Microscopy ◽  
Discotic Liquid Crystal ◽  
Rigid Spacer ◽  
Temperature Liquid ◽  
Columnar Mesophases ◽  
Homocoupling Reaction

Pd-Cu catalyzed homocoupling reaction has been used for the synthesis of symmetrical triphenylene discotic liquid crystal dimers, [C18H6(OCnH2n+1)5(O2CC6H4C≡C-)]2 (n = 4, 5, 6, 7, 8, 9), which connected two triphenylene discogens via a long rigid spacer. The purity and structure of monomers and dimers have been characterized with 1H NMR, IR and high resolution Mass. Their fine thermal stability has been confirmed by the results of thermogravimetry analysis (TGA). Polarized optical microscopy (POM) and differential scanning calorimetry (DSC) results have shown that the monomers and dimers exhibit columnar mesophases (Col). The dimers display wide mesophase ranges and are room temperature liquid crystals, and their clearing points increased with the lengthening of peripheral alkyl chain.

Synthesis and characterization of a metal chelate-bridged quasi-ladder main chain discotic liquid crystal polymer

2001 ◽  
Vol 28 (3) ◽  
pp. 477-481 ◽  
Author(s):  
Ping Xie ◽  
Zhongrong Shen ◽  
Yubiao Liu ◽  
Bin Kong ◽  
Chunqing Liu ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Main Chain ◽  
Metal Chelate ◽  
Liquid Crystal Polymer ◽  
Synthesis And Characterization ◽  
Discotic Liquid Crystal ◽  
Crystal Polymer

scholarly journals Synthesis and Characterization of New Mesomorphic Azo Compounds and Study their Photoluminesecence Properties

2016 ◽  
Vol 13 (2) ◽  
pp. 333-344
Author(s):  
Baghdad Science Journal
Keyword(s):  
Liquid Crystal ◽  
Optical Microscopy ◽  
Elemental Analysis ◽  
Room Temperature ◽  
Azo Compounds ◽  
Synthesis And Characterization ◽  
Photoluminescence Properties ◽  
Organic Solution ◽  
Polymeric Liquid

The preparation of a new Azo compounds of highly conjugated dimeric and polymeric liquid crystal to achieve the crystalline characteristics Which have structures assigned based on elemental analysis, IR 1HNMR and CHNS-O while mesogenic properties have been set for DSC and hot-stage polarizing optical microscopy. The compounds show enantiotropicnematic phase being displayed. The compounds show photoluminescence properties in the organic solution at room temperature, with the fluorescence band centered around 400 nm.

scholarly journals Synthesis and characterization of a new ZIF-67@MgAl2O4 nanocomposite and its adsorption behaviour

RSC Advances ◽  
2021 ◽  
Vol 11 (22) ◽  
pp. 13245-13255
Author(s):  
Mehdi Davoodi ◽  
Fatemeh Davar ◽  
Mohammad R. Rezayat ◽  
Mohammad T. Jafari ◽  
Mehdi Bazarganipour ◽  
...  
Keyword(s):  
Room Temperature ◽  
Magnesium Aluminate ◽  
Synthesis And Characterization ◽  
Magnesium Aluminate Spinel ◽  
Adsorption Behaviour ◽  
Zeolitic Imidazolate Framework ◽  
Simple Method

New nanocomposite of zeolitic imidazolate framework-67@magnesium aluminate spinel (ZIF-67@MgAl2O4) has been fabricated by a simple method at room temperature with different weight ratios.

Synthesis and characterization of thermoresponsive diblock copolymer bearing amino acid moieties via click reaction

2011 ◽  
Vol 68 (5) ◽  
pp. 1315-1325 ◽  
Author(s):  
Zhilei Liu ◽  
Jianping Zhou ◽  
Hongbo Liang ◽  
Jianping Sun
Keyword(s):  
Amino Acid ◽  
Diblock Copolymer ◽  
Click Reaction ◽  
Synthesis And Characterization

scholarly journals Synthesis and Characterization of Polyphosphazenes Modified with Hydroxyethyl Methacrylate and Lactic Acid

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Evelyn Carolina Martínez Ceballos ◽  
Ricardo Vera Graziano ◽  
Gonzalo Martínez Barrera ◽  
Oscar Olea Mejía
Keyword(s):  
Lactic Acid ◽  
Ring Opening ◽  
Room Temperature ◽  
Block Structure ◽  
Ring Opening Polymerization ◽  
Synthesis And Characterization ◽  
Poly Lactic Acid ◽  
Hydroxyethyl Methacrylate ◽  
H Nmr

Poly(dichlorophosphazene) was prepared by melt ring-opening polymerization of the hexachlorocyclotriphosphazene. Poly[bis(2-hydroxyethyl-methacrylate)-phosphazene] and poly[(2-hydroxyethyl-methacrylate)-graft-poly(lactic-acid)-phosphazene] were obtained by nucleophilic condensation reactions at different concentrations of the substituents. The properties of the synthesized copolymers were assessed by FTIR,1H-NMR and31P-NMR, thermal analysis (DSC-TGA), and electron microscopy (SEM). The copolymers have a block structure and show twoTg's below room temperature. They are stable up to a temperature of 100°C. The type of the substituents attached to the PZ backbone determines the morphology of the polymers.

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