31189-03-4Relevant academic research and scientific papers
Competition and promotion between two different liquid-crystalline building blocks: Mesogen-jacketed liquid-crystalline polymers and triphenylene discotic liquid crystals
Zhu, Yu-Feng,Guan, Xiao-Lin,Shen, Zhihao,Fan, Xing-He,Zhou, Qi-Feng
, p. 3346 - 3355 (2012)
Mesogen-jacketed liquid-crystalline polymers (MJLCPs) containing two triphenylene (Tp) units in the side chains, denoted as PPnV (n = 3 or 6, which is the number of the methylene units between the terephthalate core and Tp moieties in the side chains), were synthesized through conventional free radical polymerization, and the phase behaviors of these new combined main-chain/side-chain liquid-crystalline (LC) polymers were investigated. The chemical structures of the monomers were confirmed by elemental analysis, high-resolution mass spectrometry, and 1H/13C NMR. The molecular characterizations of the polymers were performed with 1H NMR, gel permeation chromatography, and thermogravimetric analysis. LC behaviors of the polymers were investigated by differential scanning calorimetry (DSC), polarized light microscopy, and wide-angle X-ray diffraction (WAXD). Both polymers exhibit excellent thermal stabilities. DSC and WAXD results indicate that covalently incorporating Tp discotic liquid crystals has a tremendous effect on the LC behaviors of MJLCPs. As expected, the glass-transition temperature decreases as the spacer length increases. Both polymers form rectangular columnar (φR) phases at relatively high temperatures. At low temperatures, however, Tp moieties in the side chains form a discotic nematic (ND) phase in conjunction with the IR phase developed by the rod-like supramolecular mesogen - the MJLCP chain as a whole, owing to the self-organization of the Tp moieties. For PP6V in particular, a higher symmetry hexagonal columnar (φH) phase forms when temperature exceeds 225 °C. Individual ordered structures developed by these two LC building blocks are not only competitive but also promotive to each other.
Indent and bulge-discogens for controlling the columnar mesophase
Ong, Chi Wi,Hwang, Chia-Yi,Liao, Su-Chih,Pan, Cheng-Hao,Chang, Tsu-Hsin
, p. 5149 - 5154 (2009)
Two series of dibenzophenazines with their mesogenic cores substituted by indent or bulge peripheral side chains have been synthesized. A good balance between anisotropy and isotropy has been achieved by the tri-functionalized bulge-discogen having a pair
Synthesis and phase behavior of mesogen-jacketed liquid crystalline polymer with triphenylene discotic liquid crystal mesogen unit in side chains
Ban, Jianfeng,Chen, Sheng,Zhang, Hailiang
, p. 54158 - 54167 (2014)
A novel mesogen-jacketed liquid crystalline polymer (MJLCP) containing two triphenylene (Tp) units in the side chains, named poly[bis(3,6,7,10,11-pentakis(hexyloxy)triphenylen-2-yl)2-vinyl terephthalate] (PBTCS), was designed and successfully synthesized via conventional free radical polymerization. The chemical structure of the monomer was confirmed by 1H/13C NMR and high-resolution mass spectrometry. The molecular characterization of the polymer was performed with 1H NMR, gel permeation chromatography (GPC) and thermogravimetric analysis (TGA). The phase structure and transition of the polymer were investigated by the combination of techniques, including differential scanning calorimetry (DSC), polarizing optical microscope (POM), 1D/2D wide-angle X-ray diffraction (1D and 2D WAXD) and 1D small-angle X-ray scattering (1D SAXS). The results showed that the PBTCS reached a relatively high glass transition temperature and formed a higher symmetry hexagonal columnar (ΦH) phase due to the strong coupling effect between the Tp moieties and the MJLCP main chain. This journal is
Benzophenanthrene benzoyloxy benzene bridged perylene bisimide diester synthetic method
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Paragraph 0019; 0020, (2017/09/01)
The invention provides a benzophenanthrene benzoyloxy benzene bridged perylene bisimide diester synthetic method. A synthesis route is characterized in that 1) p-acetenyl benzoic acid is synthesized; monohydroxy pentahexyloxy benzophenanthrene is generated; a benzophenanthrene derivative containing terminal alkyne is finally prepared; 2) N-(4-iodophenyl)perylene imine dioctyl phthalate diester is generated; and 3) an intermediate obtained by the above two parts, and a benzophenanthrene benzoyloxy benzene bridged perylene bisimide diester binary compound is obtained through a reaction by a Sonogashira cross-coupling reaction. The benzophenanthrene and its derivative are most widely discotic liquid crystal material in the prior art, have good photoelectric property, and can easily form a cylindrical liquid crystalline phase, a perylene imide derivative has strong electronic capacity, has high electronic affinity, has strong absorption capacity at a visible light zone, and is an excellent n-type organic semiconductor material. The discotic liquid crystal binary compound with an electron donor (D)-bridge (B)-acceptor (A) structure is designed and synthesized, and can be used for molecule devices of an organic photovoltaic material, a liquid crystal material, an organic solar energy cell, and an organic light-emitting diode.
Synthetic method of benzophenanthrene alkyne biphenyl alkyne benzene bridging perylene bisimide diester binary compound
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Paragraph 0018; 0019, (2017/08/29)
The invention discloses a synthetic method of a benzophenanthrene alkyne biphenyl alkyne benzene bridging perylene bisimide diester binary compound. The synthetic method comprises a synthetic route as below: (1) synthesizing a benzophenanthrene derivative
Synthesis method of benzophenanthrene benzyloxy-alkyne biphenyl and propyzamide bridged perylene imide dihexyl ester
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Paragraph 0014-0015, (2017/08/29)
The invention aims to provide a synthesis method of benzophenanthrene benzyloxy-alkyne biphenyl and propyzamide bridged perylene imide dihexyl ester. A synthetic route is that in the first part, monohydroxyl pentahexyloxy benzophenanthrene is firstly synt
Synthesizing method of benzophenanthrene benzoyloxy alkynylphenyl alkynylphenyl bridged perylene mono-imide dihexyl ester
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Paragraph 0019; 0020, (2017/09/01)
The invention aims at providing a synthesizing method of benzophenanthrene benzoyloxy alkyne benzyne benzene bridged perylene mono-imide dihexyl ester. A synthesizing path of the synthesizing comprises the first part of synthesizing iodine-containing phenyl ethynyl benzoyloxy penta-hexyloxy benzophenanthrene, the second part of utilizing 3,4,9,10-perylene tetracarboxylic acid anhydride as a raw material and synthesizing alkyne-containing phenyl perylene bisimide diester derivative and the third part of synthesizing intermediates obtained through the first part and the second part into benzophenanthrene oxycarbonyl phenylalkynylphenyl alkynylphenyl bridged perylene mono-imide dihexyl ester binary compound through Sonogashira cross coupling reaction. Benzophenanthrene and derivative of the benzophenanthrene are disc-shaped liquid crystal materials which are most extensively utilized currently, and perylene bisimide derivative is an excellent n type organic semiconductor material. The synthesizing method disclosed by the invention designs and synthesizes disc-shaped liquid crystal binary compound containing an electron donor-bridge-receptor structure, and the compound can be applied to molecular devices of organic solar cells, organic light emitting diodes and the like.
Synthesis method of triphenylene benzoyloxy alkynyl biphenyl alkynyl benzene bridged perylene monoimine dihexyl ester
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Paragraph 0019; 0020, (2017/12/29)
The invention aims at providing a synthesis method of triphenylene oxycarbonyl phenylacetylenic biphenyl alkyne benzene bridged perylene monoimine dihexyl ester. The synthesis method comprises the synthesis routes: firstly, synthesizing iodine-containing biphenylyl acetenyl benzoyloxy pentaoctoxytriphenylene; secondly, synthesizing an alkyne-containing phenyl perylene imide diester derivative by taking perylene tetracarboxylic anhydride as a raw material; and thirdly, carrying out Sonogashira cross-coupling reaction on an intermediate obtained by the two steps to synthesize a triphenylene oxycarbonyl phenylacetylenic biphenyl alkyne benzene bridged perylene monoimine dihexyl ester binary compound. Triphenylene and a derivative thereof are discoid liquid crystal materials most extensively applied at present, while a perylene imide derivative is a favorable N-type organic semiconductor material. The invention designs and synthesizes a discoid liquid crystal binary compound with an electron donor-bridge-receptor structure, and the compound can be applied to molecular devices such as organic solar cells and organic light-emitting diodes.
Synthetic method for benzophenanthrene benzyne bridging perylene bisimide diester binary compound
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Paragraph 0018; 0019, (2017/08/28)
The invention discloses a synthetic method for a benzophenanthrene benzyne bridging perylene bisimide diester binary compound. The synthetic method includes the synthetic routes of (1) synthesis of a benzophenanthrene derivative containing alkynyl, (2) sy
Synthesis method of benzophenanthrene-alkyne-benzene-alkyne-benzene bridging perylene bisimide diester binary compound
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Paragraph 0018; 0019, (2017/08/28)
The invention discloses a synthesis method of a benzophenanthrene-alkyne-benzene-alkyne-benzene bridging perylene bisimide diester binary compound. The synthetic route is as follows: (1) the synthesis of a benzophenanthrene derivative; (2) the synthesis o
