Rare earth metal phthalocyanine grafted anthraquinone and its preparation method and application in optical limiting

Abstract

The invention discloses a hyperbranched rare earth metal phthalocyanine grafted anthraquinone compound, wherein the rare earth metal phthalocyanine ring and the active anthraquinone compound ring are in a vertical state, and the axially substituted anthraquinone compound group can be combined with Phthalocyanine rings interact to favorably affect nonlinear optical properties. The invention also discloses the preparation method of the hyperbranched rare earth metal phthalocyanine grafted anthraquinone compound and its application in the field of laser protection, especially in the field of optical limiting.

Description

technical field [0001] The invention belongs to the field of phthalocyanine compounds, and in particular relates to a hyperbranched rare-earth metal phthalocyanine-grafted anthraquinone compound, a preparation method thereof, and an application in the field of laser protection, especially in the field of optical limiting. Background technique [0002] The high energy density and concentrated energy of laser light will cause damage to human eyes and optical sensitive components. Therefore, nonlinear optical materials that can protect laser light are required. As a class of molecules with highly conjugated π electron cloud system, rare earth metal phthalocyanines are easy to modify and modify, and have the characteristics of low linear absorption and stable chemical structure. Rare-earth metal phthalocyanines have high nonlinear absorption coefficients when irradiated by nanosecond laser pulses with a wavelength of 532 nm, suggesting their great potential for optical confineme...

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Problems solved by technology

[0004] At present, there are still two problems in the research on phthalocyanine as a laser protection material: first, phthalocyanine easily forms dimers or even trimers in the medium, which will seriously affect the laser protection effect of phthalocyanine ("Synthesis, X- raystructures and characterization of beryllium phthalocyanine and (2-ethoxyethanol)-aqua-beryllium phthalocyanine”, R.Kubiak et al., Inorganica Chimica Acta, 359 (2006) 1344–1350); in addition, phthalocyanine and metal particles or carbon-based materials ( Such as graphene, carbon nanotubes, etc.) hybrids are prone to sedimentation or uneven dispersion in the medium (“Covalent functionalization of graphene oxide with hyperbranched lanthanumphthalocyanines for improving optical limiting”, Wang Xin et al., Materials Letters, available line 8October 2019: https: / / doi.org / 10.1016 / j.matlet.2019.126781)

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