Star-shaped polymer PFStODO by atom transfer radical polymerization: Its synthesis, characterization, and fluorescence property
作者:Pei-Yang Gu、Cai-Jian Lu、Qing-Feng Xu、Gao-Jie Ye、Wei-Qiang Chen、Xuan-Ming Duan、Li-Hua Wang、Jian-Mei Lu
DOI:10.1002/pola.25055
日期:2012.2.1
transfer radical polymerization initiated by a tetrafunctional initiator, pentaerythritol tetrakis(2‐bromoisobutyrate) (4Bri‐Bu), was studied in detail and characterized by 1H NMR, GPC, and TG‐DSC. The solution, film luminescence of monomer, and its polymer were studied in detail. Compared with that of monomer, both luminescence emission intensity and quantum yield of star‐shaped polymer PFStODO in DMF
合成了一种新型的带有吡唑啉发色团的单体3-(4-氟苯基)-1-苯基-5-(4-(4-乙烯基苄氧基)苯基-4,5-二氢-1H-吡唑(FStODO),对由四官能引发剂季戊四醇四(2-溴异丁酸酯)(4Bri-Bu)引发的原子转移自由基聚合进行了详细研究,其特征为11 H NMR,GPC和TG-DSC。详细研究了溶液,单体及其聚合物的薄膜发光。与单体相比,DMF溶液中星形聚合物PFStODO的发光强度和量子产率均降低。但是,用飞秒激光在DMF溶液中测量的双光子吸收(TPA)光谱显示出完全不同的结果,即聚合物的最大TPA横截面值达到203 GM,比单体本身的更好(13 GM) 。更有趣的是,聚合物膜表现出令人惊奇的白色发射,其范围为受激准分子形成的400至700 nm。我们将这种受激准分子的形成归因于薄膜中有序的生色团聚集体,这已通过X射线衍射进一步证实。©2011 Wiley Periodicals,Inc