8-hydroxyquinoline-terminated hyperbranched polyester rare earth complex and its preparation method and application

Abstract

The invention discloses an 8-hydroxyquinoline terminated hyperbranched polyester rare earth complex as well as a preparation method and an application thereof. The structural formula of the complex is represented in the formula (I). The preparation method comprises steps as follows: (1), hydroxyl-terminated hyperbranched polyester is modified by a modifying agent, and an 8-hydroxyquinoline structure is connected onto the terminal hydroxyl group to obtain 8-hydroxyquinoline terminated hyperbranched polyester; (2), 8-hydroxyquinoline terminated hyperbranched polyester, a second ligand and soluble salt of rare earth are dissolved in an organic solvent for an reaction, and after the reaction is finished, the 8-hydroxyquinoline terminated hyperbranched polyester rare earth complex is obtained through separation in a reaction liquid. The 8-hydroxyquinoline terminated hyperbranched polyester rare earth complex has a function of fluorescence emission in a near-infrared communication window, is suitable as a gain medium of an active optical waveguide amplifier, has the larger fluorescence half-width (FWHM), and is expected to obtain the larger gain bandwidth.

Description

technical field [0001] The invention relates to a complex, in particular to an 8-hydroxyquinoline-terminated hyperbranched polyester rare earth complex and a preparation method and application thereof. Background technique [0002] The optical waveguide amplifier has the ability to provide high gain in a short optical path, and it will play an increasingly important role in the field of optical communication. The gain medium plays a central role in the operation of the optical waveguide amplifier. Erbium (Er 3+ ), Neodymium (Nd 3+ ) and Ytterbium (Yb 3 + ) electronic transitions belong to the f-f transition, and their fluorescence emission is located in the near-infrared region of the optical communication operating wavelength, which has optical gain characteristics and can be used as a gain active material for optical waveguide amplifiers. [0003] 8-Hydroxyquinoline (HQ) has a large conjugated π bond structure and a high light absorption coefficient. Both nitrogen and...

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Problems solved by technology

Zhang Xizhen Prepared Erbium Complex ErYb(DBM) 3 MA, and dissolved it in cyclopentanone, and mixed the solution into SU8-2005 to prepare an active optical waveguide amplifier, but the experiment found that the compatibility of the small molecule erbium complex with SU8-2005 was not good, and the erbium ion The doping concentration is only 0.1wt%. No matter how high the concentration is, precipitation will occur (Zhang Xizhen, Changchun: Jilin University, 2007, 98.)

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