Istanbul Technical University, Istanbul, 34469, Turkey.
Canakkale Onsekiz Mart University, Canakkale, 17100, Turkey.
Chem Commun (Camb). 2019 Sep 24;55(77):11531-11534. doi: 10.1039/c9cc04968a.
We report a new method for the photoinduced synthesis of poly(N-ethylcarbazole) (PEC). Inspired by the photochemical decomposition and electron transfer reactions of N-phenacylethyl carbazolium hexafluorophosphate (ECPhAc) salt, we used ECPhAc as the single molecule possessing both initiator and monomer structures to form PEC with relatively higher yield and higher molecular weight compared to that obtained from the bare monomer. This step-growth approach, eliminating the use of additional oxidizing agent, involves successive photoexcitation, cleavage, electron transfer, proton release, and coupling steps. The structural characteristics, electrochemical properties, and surface morphologies of the obtained PEC before and after the dedoping process were investigated by UV-vis, FT-IR, fluorescence, NMR, MALDI-TOF, SEC, AFM, cyclic voltammetry (CV), and differential pulse voltammetry (DPV). Doped PEC exhibited white light emission covering all visible regions offering a potential application in white light OLEDs.
我们报告了一种新的聚 N-乙基咔唑（PEC）光诱导合成方法。受 N-苯乙酮乙基咔唑翁六氟磷酸盐（ECPhAc）盐的光化学分解和电子转移反应的启发，我们使用 ECPhAc 作为同时具有引发剂和单体结构的单个分子，与仅使用单体相比，形成的 PEC 具有更高的产率和更高的分子量。这种逐步增长的方法消除了对额外氧化剂的使用，涉及连续的光激发、裂解、电子转移、质子释放和偶联步骤。通过紫外可见分光光度计、傅里叶变换红外光谱仪、荧光光谱仪、核磁共振光谱仪、基质辅助激光解吸电离飞行时间质谱仪、凝胶渗透色谱仪、原子力显微镜、循环伏安法和差分脉冲伏安法研究了掺杂前后获得的 PEC 的结构特征、电化学性质和表面形貌。掺杂的 PEC 表现出覆盖所有可见区域的白光发射，为白光 OLED 的潜在应用提供了可能性。
