中文摘要：

合成了联苯基团修饰的联茚满二羟基烯二酮2a和2b,研究了其光致变色、光致自由基和液晶性质,讨论了结构与性质之间的关系.结果表明,两种目标化合物在固态下均具有光致变色和光致自由基性质,但都不具有液晶性质.当联苯基团与联茚满二羟基烯二酮母体结构单元之间的烷氧基链较短时,光致变色现象更显著.

英文摘要：

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.