Click chemistry-based synthesis of azo polymers for second-order nonlinear optics
作者:Balakrishna Kolli、Sarada P. Mishra、M. P. Joshi、S. Raj Mohan、T. S. Dhami、A. B. Samui
DOI:10.1002/pola.25928
日期:2012.4.15
Four linear polymers containing pendant azo moiety were synthesized through click chemistry for second‐order nonlinear optical study. The polymers were found soluble in most of the polar organic solvents such as tetrahydrofuran (THF), chloroform, and dimethyl formamide (DMF). The polymers showed thermal stability up to 300 °C and glass transition temperatures (Tg) in the range of 120–140 °C. The molecular
通过点击化学合成了四个含有偶氮侧基的线性聚合物,用于二阶非线性光学研究。发现该聚合物可溶于大多数极性有机溶剂,例如四氢呋喃(THF),氯仿和二甲基甲酰胺(DMF)。聚合物在高达300°C的温度下表现出热稳定性,玻璃化转变温度(T g)在120-140°C的范围内。分子量(M w这些聚合物(通过凝胶渗透色谱法测量)的范围为37,900-55,000 g / mol。发现该聚合物通过从THF溶液流延形成光学透明的膜。由紫外可见吸收光谱计算出阶次参数。极化后薄膜的形貌变化通过原子力显微镜表征。通过使用1064 nm Nd:YAG激光器获得二次谐波(SHG)强度的角度依赖性,温度依赖性和时间依赖性。最高95°C时,SHG强度保持不变。在室温下,在最初下降约14%之后的8天内仍保持稳定。©2012 Wiley Periodicals,Inc. J Polym Sci A部分:Polym Chem,2012年