Preparation and characterization of a novel strong-fluorescent hydrotalcite-like compound (Al-HTLc)  

作　　者：ZHANG WenGong CHEN Hong 

机构地区：[1]Institute of Polymer Science,College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China

出　　处：《Science China Chemistry》2008年第9期834-841,共8页中国科学（化学英文版）

基　　金：the National Natural Science Foundation of China (Grant No. 50272014);the Key Item of Natural Scientific Foundation of Fujian Province (Grant No. 2001F005);the Key Nano Special Item of Fujian Province (Grants No. 2005HZ01-5)

摘　　要：A novel strong-fluorescent hydrotalcite-like compound (Al-HTLc) was synthesized by coprecipitation. In the sample, the content of aluminum(III) in the layers was decreased to a proper value. The Al3+ ions coordinated with 8-hydroxyquinolines (8-HQ) which were dispersed into the anions in the interlayer region. The sample was characterized by XRD, XPS, FT-IR, TG-DSC, UV-Vis, and fluorescence spec- troscopy; its composition and structure were also determined. The results indicate that the sample can emit fluorescence (487 nm) with a strong fluorescence intensity (4.9×105 (a.u.)). The fluorescent lifetime and fluorescence quantum yield of Al-HTLc were measured to be 21.24 ns and 67%, respectively, higher than those of pure 8-hydroxyquinoline aluminum (Alq3). The result of TG-DSC measurement clearly shows the enhanced thermal stability of Al-HTLc compared with that of MgAl-LDH and pure Alq3. Al-HTLc may be used as a novel luminescent functional material.A novel strong-fluorescent hydrotalcite-like compound (Al-HTLc) was synthesized by coprecipitation. In the sample, the content of aluminum(III) in the layers was decreased to a proper value. The Al3+ ions coordinated with 8-hydroxyquinolines (8-HQ) which were dispersed into the anions in the interlayer region. The sample was characterized by XRD, XPS, FT-IR, TG-DSC, UV-Vis, and fluorescence spectroscopy; its composition and structure were also determined. The results indicate that the sample can emit fluorescence (487 nm) with a strong fluorescence intensity (4.9×105 (a.u.)). The fluorescent lifetime and fluorescence quantum yield of Al-HTLc were measured to be 21.24 ns and 67%, respectively, higher than those of pure 8-hydroxyquinoline aluminum (Alq3). The result of TG-DSC measurement clearly shows the enhanced thermal stability of Al-HTLc compared with that of MgAl-LDH and pure Alq3. Al-HTLc may be used as a novel luminescent functional material.

关 键 词：hydrotalcite-like compound 8-HYDROXYQUINOLINE aluminum INTERCALATION assembly SUPRAMOLECULE fluorescence FLUORESCENT LIFETIME 

分 类 号：O611.3[理学—无机化学]