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 generally non-volatile, and it is difficult to form thin films by vacuum vapor deposition technology. These factors limit the wider application of rare earth luminescent materials.
(4) Its liquid crystal interval is narrow, and its liquid crystal performance is poor at room temperature

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
Effect test

Embodiment 1

[0053] A metal-complexed liquid crystal polymer, the general structure of which is:

[0054]

[0055]

[0056] The preparation method of this compound is:

[0057] 4-(4-allyloxybenzoyloxy)-biphenoxyyl cholesteryl valerate (Ch) and allyloxybenzoic acid (I) and hydrogen-containing siloxane (PMHS) dissolved in toluene Among them, according to the molar ratio Ch: I: hydrogen-containing siloxane (PMHS): toluene is 50%: 50%: 10: 1, 50 ℃ constant temperature 4h, add the Pt / C catalyst of 8% of the total mass of reactants, React at 80°C for 24h. Monitor the reaction process with an infrared spectrometer, when the Si-H bond in PMHS is at 2166cm -1 The reaction was considered complete when the stretching vibration peak at the point disappeared completely. The reaction mixture was poured into methanol for precipitation and filtered with suction. The filter cake is washed with hot ethanol to remove unreacted monomers, and dried to obtain liquid crystal ionomer products.

[0058]...

Embodiment 2

[0067] A metal-complexed liquid crystal polymer, the general structure of which is:

[0068]

[0069] R 2 for

[0070] The preparation method of this compound is:

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

[0072] In a 100mL sing...

Embodiment 3

[0080] A metal-complexed liquid crystal polymer, the general structure of which is:

[0081]

[0082] R 3 for

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

[0084] In a 100mL single-necked bottle, the metal chloride salt...

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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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