One-step synthesis of a thienylenepyridazinylenethienylene-based coil-rod-coil copolymer with enhanced emission and improved fluorescence stability
作者:Wei Wu、Haibo Xu、Dezhi Shen、Tian Qiu、Li-Juan Fan
DOI:10.1002/pola.26535
日期:2013.4.1
other characterizations. PEG‐OEPETPT‐PEG has a 12 nm blue‐shift in the emission maximum compared with that of PEPETPT, and a higher quantum yield of fluorescence in THF. PEG‐OEPETPTE‐PEG tolerates up to 20% water content in H2O/THF mixed solvent without significantly changing the emission wavelength and intensity, while the fluorescence of PEPETPT is dramatically quenched by a very small quantity of water
通过一步法通过Sonogashira偶联合成了一种新的线圈-棒-线圈共聚物。PEG-OEPETPT-PEG构成的聚(乙二醇)的共聚物(PEG)作为线圈块,并且低聚[ p - (ethynylenephenyleneethynylene) - ALT - (thienylenepyridazinylenethienylene)](OEPETPT)作为杆段。还合成了具有相同共轭结构单元的共轭聚合物PEPETPT进行比较。两种聚合物的结构均通过NMR结合其他特征进行确认。与PEPETPT相比,PEG-OEPETPT-PEG的最大发射蓝移为12 nm,并且THF中的荧光量子产率更高。PEG-OEPETPTE-PEG耐受H 2中高达20%的水分O / THF混合溶剂,而不会显着改变发射波长和强度,而PEPETPT的荧光被少量的水显着淬灭。关于这两种聚合物的进一步光物理研究表明,将PEG盘管引入共轭嵌