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Graphene Oxide Covalently Functionalized with Organic Molecules for Broadband Optical Limiting Performance

Author: ZhuJinHui
Tutor: Chen
School: East China University of Science and Technology
Course: Applied Chemistry
Keywords: Optical limiting Graphene Phthalocyanine Covalent modification
CLC: O613.71
Type: Master's thesis
Year: 2011
Downloads: 416
Quote: 0
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Abstract


Optical Limiting a nonlinear optical phenomenon, which means that when the light beam passes through the optical limiting material , the material can reduce the light intensity of the human eye and the sensor to an acceptable level. And C60, phthalocyanine , as the six-membered ring composed of carbon atoms having a two-dimensional structure of the graphene , but also demonstrated the potential for optical limiting properties. However, its biggest disadvantage is the common poor solubility in organic solvents , thus limiting their practical application limiter devices , the design and preparation of a series of papers of soluble small molecules graphene modified derivatives of the material the basic structure and optical limiting properties were studied . The first chapter summarizes the system and its derivatives graphene Preparation and optical limiting potential applications . Chapter synthesized by the amidation reaction of zinc phthalocyanine substituted lateral graphene oxide (GO) hybrid material , according to XPS and FTIR spectra confirmed the zinc phthalocyanine and an amide bond formed between GO . In the same linear extinction coefficient , the zinc phthalocyanine GO covalent modification of the hybrid material with a 1064 nm 532 nm and the extinction coefficient and broadband nonlinear optical limiting performance than GO and zinc phthalocyanine itself . In order to further promote the improvement of the optical limiting properties , in the third chapter , the synthesis of highly soluble gallium phthalocyanine GO axial modification . Effectively prevents axial substituted phthalocyanine aggregation , thus contributing to the improvement of optical limiting performance , GO and gallium phthalocyanine formed between the Ga-O bond can be confirmed through XPS spectra . At the same concentration , hybrid materials in 532 nm and 1064 nm extinction coefficient and nonlinear optical limiting performance than GO, gallium phthalocyanine and C60. Chapter IV describes the N-(4 - anilino ) carbazole covalent modification GO hybrid materials synthesis and optical limiting properties. Hybrid materials at 532 nm and 1064 nm under both GO greater than the extinction coefficient and stronger nonlinear optical limiting performance , attributable to hybrid materials within the GO and N-(4 - anilino ) between carbazole sliding electronic system formation . In order to study the nonlinear optical GO intrinsic optical limiting performance in particular , in the fifth chapter, we prepared through amidation reaction covalent modification GO POSS hybrid materials , hybrid materials in chloroform has a good solubility , compared to the fluorescence intensity enhanced GO .

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CLC: > Mathematical sciences and chemical > Chemistry > Inorganic Chemistry > Non-metallic elements and their compounds > Part Ⅳ family of non-metallic elements (carbon and silicon ) and its compounds > Carbon C
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