Preparation and Wave-absorbing Performance of Retinyl Schiff Base Salts Coordinated with Rare Earth La³⁺ and Ce³⁺ Ions

• Main Authors: LIU Huteng, ZHOU Kesheng, DENG Lianwen, LIU Sheng, HE Longhui, YAO Lingling
• Format: Article
• Language: zho
• Published: Journal of Aeronautical Materials 2018-04-01
• Series: Journal of Aeronautical Materials
• Subjects: retinyl Schiff base; rare earth ion; dielectric loss; absorption performance; wave absorbing principle
• Online Access: http://html.rhhz.net/CHXB/html/2018-2-104.htm
• ISSN: 1005-5053; 1005-5053

With vitamin A acetate as raw material, ethylenediamine retinyl Schiff base salts coordinated with rare earth ion La³⁺, Ce³⁺ were synthesized, and the structure of the products was characterized by FT-IR and Raman spectra. The electromagnetic parameters in the frequency range of 2-18 GHz were measured by microwave vector network analyzer, its reflectivity was calculated, and the main factors and mechanism that affect the wave-absorbing performance of rare retinyl Schiff base salts were discussed. The results show that the coordination bond is formed by the rare earth ions and Schiff base. The reflectivity of Schiff base coordinated with La³⁺ ion is –16 dB at 12.9 GHz (bandwidth with reflectivity better than –10 dB is 3.1 GHz), the reflectivity of Schiff base coordinated with Ce³⁺ ion is –18.8 dB at 12.7 GHz (bandwidth with reflectivity better than –10 dB is 3.4 GHz). Microwave absorption performances of the both are superior to the wave-absorbing performance of Schiff base coordinated with non-rare earth ions.