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Hyperbranched Rare Earth Phthalocyanine Modified Graphene Oxide and Its Preparation and Application in Laser Protection

A graphene and graphene surface technology, applied in chemical instruments and methods, optics, carbon compounds, etc., can solve the problems of reducing machinability, film quality, dispersion stability, etc.

Active Publication Date: 2020-07-24
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, some nanocomposites based on GO and phthalocyanine have been reported with excellent photoelectric properties, but the dispersion of such nanocomposites in organic solvents does not have sufficient stability due to the π-π stacking of phthalocyanine rings, Nanocomposites tend to aggregate, reducing their processability and film quality

Method used

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  • Hyperbranched Rare Earth Phthalocyanine Modified Graphene Oxide and Its Preparation and Application in Laser Protection
  • Hyperbranched Rare Earth Phthalocyanine Modified Graphene Oxide and Its Preparation and Application in Laser Protection
  • Hyperbranched Rare Earth Phthalocyanine Modified Graphene Oxide and Its Preparation and Application in Laser Protection

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Embodiment 1

[0071]

[0072] Step 1, take 0.2g monomer (the compound shown in the above formula 2), 1.5mL DBU (1,8-diazabicycloundec-7-ene) and 0.35g lanthanum chloride mixed in 30mLDMF and 7mLDMAC , heated to reflux under nitrogen for 8 hours. The solution was cooled to room temperature, then filtered. The resulting purple crystalline precipitate was washed quickly with acetic anhydride, cold acetone and then air dried. A total of 0.26 g of crude product were obtained in this way. The solid was then extracted with several 100 mL portions of chloroform. The volume of the green remaining solution was reduced on a rotary evaporator, which after concentration and addition of hexane gave 0.022 g of a green powder of hyperbranched lanthanum phthalocyanine, noted as HBLaPc. Yield 8.2%.

[0073] Step 2: Take 20 mg of graphene oxide GO, ultrasonically disperse it in 60 mL of DMF, and keep ultrasonic at below 20 °C for 2 h. Add 20 mg of HBLaPc prepared above and 0.18 g of silver trifluorome...

Embodiment 2

[0078]

[0079]In step 1, 0.7 g of monomer (the compound represented by the above formula 2) and 0.25 g of metallic lithium were mixed in 60 mL of DMF, and heated to reflux under nitrogen for 5 hours. Cool the solution to room temperature, add 10 mL of hydrochloric acid, stir for 30 min, add 100 mL of anhydrous methanol, filter the solid with a Buchner funnel, wash the obtained solid with anhydrous methanol and 0.1 mol / L sodium hydroxide solution until neutral, Dry under vacuum at 80°C. 0.5 g of metal-free hyperbranched phthalocyanine are obtained. Take 0.1g of the above metal-free hyperbranched phthalocyanine, stir in 30mL NMP, after completely dissolving, add 0.1 lutetium acetate, heat and boil under nitrogen for 2 hours, add absolute ethanol to precipitate after cooling, wash with water and absolute ethanol several times , dried under vacuum at 60°C to obtain dark green hyperbranched lutetium phthalocyanine, which is denoted as HBLuPc.

[0080] Step 2, take 30mg graphe...

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Abstract

The invention provides hyperbranched rare-earth phthalocyanine modified graphite oxide, and preparation and application of graphite oxide in laser protection. An axial covalent connection of hyperbranched rare-earth metal phthalocyanine can provide a method of preparing an array with adjustable electrochemical and photoresponsive properties by changing a pi-rail interaction, and an axial substituent in the hyperbranched rare-earth metal phthalocyanine can advantageously influence NLO (nonlinear optics) absorption. Due to a trivalence property of a central atom of the phthalocyanine, for example, lanthanide phthalocyanine is prone to axial covalent bonding onto an active group on the surface of graphite oxide. Grafting of the hyperbranched rare-earth metal phthalocyanine on the surface ofGO (graphite oxide) significantly improve dispersion capacity and dispersion stability of a graphite oxide based material in an organic solvent. For example, at the same concentration of 0.1mg mL<-1>,hyperbranched rare-earth metal phthalocyanine modified graphite oxide shows better optical limiting performance at 532nm and 1064nm, which shows that the hyperbranched rare-earth metal phthalocyanineas a modifier of GO has the advantages.

Description

technical field [0001] The invention belongs to the technical field of graphene oxide and its preparation, in particular to a hyperbranched rare earth metal phthalocyanine-modified graphene oxide and its preparation method and application. Background technique [0002] Lasers cause damage to human eyes and optical sensitive components, and a broadband nonlinear optical material that can protect lasers is needed. Graphene (rGO) and graphene oxide (GO) possess nonlinear optical (NLO) properties, such as nonlinear scattering (NLS), two-photon absorption (TPA) and saturable absorption (SA), and are potential candidates in the fields of photonics and optoelectronics. Material. Graphene dispersions exhibit a remarkable NLO response, and their high NLO absorption coefficients when illuminated by nanosecond laser pulses at 532 nm and 1064 nm suggest great potential for broadband optical confinement applications. However, both graphene and graphene oxide exhibit poor dispersibility...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/198C01B32/194G02F1/355
CPCC01B32/194C01B32/198G02F1/355
Inventor 张云鹤王欣李博龙姜振华
Owner JILIN UNIV
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