Metal complex liquid crystal polymer and preparation method thereof

A liquid crystal polymer and metal coordination technology, applied in the field of polymer chemistry, can solve the problems of non-volatility, difficulty, low fluorescence efficiency, etc.

Inactive Publication Date: 2013-07-31
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Many metal complex liquid crystals have been prepared, but they have the following disadvantages: (1) they are unstable in organic solutions and tend to dissociate to form low-level complex forms; (2) most rare earth small molecule complexes contain (3) It is generall

Method used

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  • Metal complex liquid crystal polymer and preparation method thereof
  • Metal complex liquid crystal polymer and preparation method thereof
  • Metal complex liquid crystal polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0052] Example 1

[0053] A metal-coordinated liquid crystal polymer with the general structural formula:

[0054]

[0055]

[0056] The preparation method of the compound is:

[0057] 4-(4-Allyloxybenzoyloxy)-biphenoxyylvaleric acid cholesteryl ester (Ch), allyloxybenzoic acid (I) and hydrogen-containing siloxane (PMHS) are dissolved in toluene Among them, according to the molar ratio Ch: I: Hydrogen-containing siloxane (PMHS): Toluene is 50%: 50%: 10:1, the temperature is kept at 50°C for 4 hours, and 8% of the total mass of the reactants is added to the Pt / C catalyst. React for 24h at 80℃. Use infrared spectrometer to monitor the reaction process, when the Si-H bond in PMHS is at 2166cm -1 When the stretching vibration peak at the position disappears completely, the response is deemed complete. The reaction mixture was poured into methanol to precipitate and filtered with suction. The filter cake is washed with hot ethanol to remove unreacted monomers and dried to obtain a liq...

Example Embodiment

[0066] Example 2

[0067] A metal-coordinated liquid crystal polymer with the general structural formula:

[0068]

[0069] R 2 for

[0070] The preparation method of the compound is:

[0071] Menthyl 4-allyloxybenzoate (Ch), allyloxybenzoic acid (I) and hydrogen-containing siloxane (PMHS) are dissolved in xylene, and the molar ratio of Ch: I: contains hydrogen The ratio of siloxane (PMHS): xylene is 99.9%:0.1%:1:6, the temperature is kept at 100°C for 2.5h, the catalyst Pd / C catalyst is added with 0.05% of the total mass of reactants, and the reaction is at 130°C for 72h. The reaction process was monitored with an infrared spectrometer. When the stretching vibration peak of the Si-H bond in PMHS at 2166 cm-1 disappeared completely, the reaction was deemed complete. The reaction mixture was poured into methanol to precipitate and filtered with suction. The filter cake is washed with hot ethanol to remove unreacted monomers and dried to obtain a liquid crystal ionomer product.

[00...

Example Embodiment

[0079] Example 3

[0080] A metal-coordinated liquid crystal polymer with the general structural formula:

[0081]

[0082] R 3 for

[0083] 4-allyloxybenzoic acid cholesteryl ester (Ch), allyloxybenzoic acid (I) and hydrogen-containing siloxane (PMHS) are dissolved in toluene, and the molar ratio Ch: I: hydrogen-containing silicone Alkane (PMHS): toluene ratio of 20%:80%:1:30, constant temperature at 90°C for 1h, adding hexachloroplatinic acid catalyst with 2.2% of the total mass of the reactants, reacting at 15°C for 18h. The reaction process was monitored with an infrared spectrometer. When the stretching vibration peak of the Si-H bond in PMHS at 2166 cm-1 disappeared completely, the reaction was deemed complete. The reaction mixture was poured into methanol to precipitate and filtered with suction. The filter cake is washed with hot ethanol to remove unreacted monomers and dried to obtain a liquid crystal ionomer product.

[0084] In a 100mL single-neck bottle, the metal chlo...

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Abstract

A metal complex liquid crystal polymer and preparation method thereof, belongs to the technical field of polymer chemistry. The structure general formula of the metal complex liquid crystal polymer is (1), wherein R1 is cholesteric liquid crystal monomer; R2 and R3 respectively are -H and -OCnH2n +1 or -CnH2n +1; A1 is the soft segment comprising carbon 1 to 14; A2, A3 and A4 are respectively linkage group with conjugated structure; M is one of Al, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. The product is prepared by taking the liquid crystal polymer containing carboxylic acid group as ligand and the metal ion as central ion, and adding carboxylic acid molecule to synthesize bonded metal liquid crystal polymer. The complex liquid crystal polymer not only maintains good liquid crystal performance, but also has excellent fluorescence property.

Description

technical field [0001] The invention belongs to the technical field of macromolecule chemistry, and in particular relates to a metal complex liquid crystal polymer and a preparation method thereof. Background technique [0002] Liquid crystal polymers not only have the orientation order of low-molecular liquid crystals, but also have the advantages of easy processing of polymers. In the liquid crystal phase, the high degree of orientation of the polymer chain makes it have excellent properties such as high modulus, high strength, and high tensile strength in the orientation direction of the molecular chain, so it has been widely used, not only for liquid crystal display panels and computers. Storage devices, separation of substances, etc., and also show high application value in composite materials. [0003] The introduction of rare earth ions into liquid crystal polymers can not only maintain the high orientation, high mechanical strength and good processability of polymer...

Claims

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Application Information

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IPC IPC(8): C08G77/18C09K19/38C09K11/06
Inventor 张宝砚丛越华顾卫敏吴文卿牟涛
Owner NORTHEASTERN UNIV
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