Synthesis and photoluminescence of linear and hyperbranched polyethers containing phenylquinoxaline units and flexible aliphatic spacers

Ultrahigh‐molecular‐weight linear polyethers were prepared through a reaction between the phenylquinoxaline monomers 2,3‐bis(4‐hydroxyphenyl)‐6‐fluoroquinoxaline and 2,3‐bis(4‐hydroxyphenyl)‐6‐(α,α,α‐trifluoromethyl)quinoxaline and 1,12‐dibromododecane. A new hyperbranched polyether containing a phenylquinoxaline moiety was also prepared from a new self‐polymerizable AB₂ monomer, 2,3‐bis(6‐bromohexyloxyphenyl)‐6‐(4‐hydroxyphenyloxy)quinoxaline. All the polyethers were amorphous and soluble in polar aprotic solvents. Their solution‐cast thin films were light yellow, ductile, and optically transparent. The polymers were thermally stable up to 350 °C and had glass‐transition temperatures in the range of 25–83 °C, which depended on the architecture and monomer structure. The monomers and polymers displayed fluorescence maxima in the blue‐light region in the range of 431–449 nm with relatively narrow peak widths; this indicated that they had pure and intense fluorescence. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 3587–3603, 2004     

非醚PPQ的三阶非线性光学性质及其时间响应

研究了一种易加工、光吸收小、热稳定性好的材料──非醚聚苯基喹啉（Ｐｏｌｙｐｈｅｎｙｌｑｕｉｎｏｘａｌｉｎｅｓ，缩写ＰＰＱ）的三阶非线性光学性质，用皮秒时间分辨简并四波混频方法测得材料的三阶非线性系数χ（３）～３×１０－１０ｅｓｕ及其时间响应快于３５ｐｓ（受所用激光脉冲宽度的限制）。