作者:Md Rahman Lutfor、Mashitah Mohd Yusoff、Gurumurthy Hegde、Muhammad Nor Fazli、Abdul Malek、Nurlin Abu Samah、H. T. Srinivasa
DOI:10.1080/15421406.2013.807204
日期:2013.1
Three banana-shaped monomers containing naphthalene as central units and azobenzene in side arms with terminal alkenes were synthesized and characterized. DSC, polarizing optical microscopy, and X-ray diffraction measurements prove that all compounds exhibit B6 phase. The trans-azobenzene showed high-intensity π–π* transition at about 365 nm and low-intensity n–π* transition at about 450 nm. The strong
合成并表征了三种以萘为中心单元和以偶氮苯为侧臂的具有末端烯烃的香蕉形单体。DSC、偏光显微镜和 X 射线衍射测量证明所有化合物都表现出 B6 相。反式偶氮苯在约 365 nm 处表现出高强度的 π-π* 跃迁,在约 450 nm 处表现出低强度的 n-π* 跃迁。分子溶液中强烈的光异构化行为表明,反式异构化为顺式异构化需要 45 秒,而反向过程需要大约 28 小时和 30 分钟。这种长时间的热背弛豫对于创建光学图像存储很有用。