Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (8): 1554.

• Articles • Previous Articles     Next Articles

Synthesis, Electrochemistry and Optical Limiting Properties of Spirobifluorene-fulleropyrrolidine Derivatives

LI Cai-Hua, HUO Zhi-Ming, ZENG He-Ping*   

  1. Institute of Functional Molecules, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
  • Received:2009-11-24 Online:2010-08-10 Published:2010-08-10
  • Contact: ZENG He-Ping. E-mail: hpzeng@scut.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20671036)和广东省科技项目(批准号: 2007A010500008)资助.

Abstract: Three novel fullerene(C60/C70) derivatives containing spirobifluorene, named 2-(9,9′-spirobi[fluorene]-2-yl)-1-methylfullero[C70]pyrrolidine(6), 2-(9,9′-spirobi[fluorene]-2-yl)-1-methylfullero[C60]pyrrolidine(7) and 2′-(1-methyl- fullero[C60]pyrrolidin-2-yl)-9,9′-spirobi[fluorene]-2-carbaldehyde(8), respectively, were synthesized and their structures were confirmed by IR, 1H NMR, 13C NMR, MALDI-TOF. Their electrochemical properties were studied by cyclic voltammetry. The results show that reduction peaks of C70 derivative 6 shift to more negative than that of C60 derivative 7 about 0.1, 0.12 and 0.01 V, respectively. Their optical limiting properties were investigated by nanosecond and femtosecond laser system. Comparative study on their optical limiting properties indicated that they showed different optical-limiting mechanisms for nanosecond and femtosecond laser. The optical limiting thresholds of 13.7, 15.3 and 23.3 J/cm2 in nanosecond timescale were determined for compounds 6—8. The results show that they are effective optical limiters for laser protection.

Key words: Optical-limiting, Spirobifluorene, Fulleropyrrolidine

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