中文摘要：

偶氮连接基团（—NN—）有着特殊的热化学和光化学行为,在适当波长光的照射下,能发生可逆的顺反异构反应,从而发生吸收波长的变化。在分子设计、光定位、光致变色和热致变色等方面,偶氮连接基团的非线性光化学性质都有着潜在的应用价值。文章以含有偶氮基作为侧翼的弯曲型分子作为研究对象,比较了弯曲型和直线型分子的吸收光谱;并用计算机模拟计算了弯曲型分子的角度,发现分子弯曲角和紫外可见吸收光谱存在着密切的关系。

英文摘要：

The azo（—NN—） linkage has the particular thermochemistry and actinoche-mistry behavior,the azobenzene group can undergo reversible cis-trans isomerization under light irradiation and its nonlinear optical properties possess the potential applications in the aspects of molecular design,photofixation,photochromics,thermochromism,etc.The UV-Vis absorbance of sixteen bent-core or linear monomers containing azobenzene as side arms and substituted para/m-aminobenzoic acid as central units was studied.The angle of the bent-core molecules was simulated.The trans-form of azo compounds showed a strong band in the UV region（330~370 nm） and a weak band at 440~450 nm.It was found that it has a close relationship between the angle of the molecules and the UV-Vis absorption.