Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (7): 1360.

• Articles • Previous Articles     Next Articles

Synthesis and Photochromic Properties of Biindenyldione Derivatives with Biphenyl Units

HAN Jie*, WANG Juan-Yu, PANG Mei-Li, MENG Ji-Ben   

  1. College of Chemistry, Nankai University, Tianjin 300071, China
  • Received:2009-10-23 Online:2010-07-10 Published:2010-07-10
  • Contact: HAN Jie. E-mail: hanjie@nankai.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20772064)资助.

Abstract:

Two new biindenylidenedione derivatives with side biphenyl units were synthesized and characterized by 1H NMR, 13C NMR, MS and elemental analysis. The photochromic and photo-generated radical properties were investigated by means of solid UV-Vis spectroscopy and electron spin resonance(ESR), respectively, and the liquid crystalline property was examined by means of polarized optical microscopy(POM) and differential scanning calorimetry(DSC). The results show that the title compounds simultaneously exhibit photochromism and photo-generated radical properties in solid state, but display no liquid crystalline property perhaps due to the non-planar structure of the title compounds. The relationship between the structure and properties reveal that the shorter alkoxy chain between the biindenylidenedione and biphenyl moieties is helpful for these compounds to display photochromism.

Key words: Biindenylidenedione; Biphenyl; Photochromism

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