Dicyano-Substituted Poly(phenylenevinylene) (DiCN–PPV) and the Effect of Cyano Substitution on Photochemical Stability
作者:Jianyuan Sun、Logan P. Sanow、Sam-Shajing Sun、Cheng Zhang
DOI:10.1021/ma400661f
日期:2013.6.11
decrease in LUMO energy by 0.79 eV, and makes the polymer more stable to intense white light (>20 times as strong as the sunlight) than poly(2,5-didecyloxy-1,4-phenylenevinylene), C10O–PPV, by more than 2 orders of magnitude. The excellent photochemical stability and high fluorescence quantum yield in the solid state make DiCN–PPV a good candidate for outdoor fluorescent applications such as remote
已合成了双癸氧基取代的聚(苯二炔基亚乙烯基)DiCN–PPV。所述二氰基取代的碳酸亚乙烯单元在两个存在的反式与顺式(〜65:35),如通过确定构象1 H NMR分析,并且不能被转换为所有反式由于两种构象的热力学平衡的存在,相比于常规PPV中的亚乙烯基单元。异常高的顺式的含量使得该聚合物高度无定形,非常易溶于有机溶剂,并且在固态时具有很高的荧光性,估计的量子产率高达0.34,是其氯仿溶液的荧光性的四倍。新聚合物的LUMO和HOMO能通过循环伏安法测量。DiCN–PPV中的氰基使LUMO能量降低了0.79 eV,使该聚合物对强白光(> 20倍于太阳光)比聚(2,5-二癸氧基-1,4-)更稳定。亚苯基亚乙烯基),C 10 O–PPV,超过2个数量级。固态具有出色的光化学稳定性和高荧光量子产率,使DiCN–PPV成为室外荧光应用(如远程光学传感)的良好候选者。