Evaluating the Impact of Fluorination on the Electro-optical Properties of Cross-Conjugated Benzobisoxazoles
作者:Ramiro Chavez、Lily Diodati、David L. Wheeler、Jessica Shaw、Aimée L. Tomlinson、Malika Jeffries-EL
DOI:10.1021/acs.jpca.8b07778
日期:2019.2.21
Six 2,4,6,8-tetrarylbenzo[1,2-d:4,5-d′]bisoxazoles (BBOs) were synthesized: three bearing phenyl substituents at the 2- and 6-positions and three bearing perfluorophenyl groups at those positions. The influence of perfluoro-aryl group substitution on the physical, optical, and electronic properties of 2,4,6,8-tetrarylbenzo[1,2-d:4,5-d′]bisoxazoles (BBO) was evaluated using both experimental and theoretical
合成了六个2,4,6,8-四苯并[1,2- d:4,5- d ']双恶唑(BBO):三个在2和6位带有苯基取代基,三个在全氟苯基上带有取代基职位。全氟芳基取代对2,4,6,8-四芳基苯并[1,2- d:4,5- d]的物理,光学和电子性质的影响']双恶唑(BBO)使用实验和理论方法进行了评估。紫外-可见光谱证明,密度泛函理论(DFT)模型与实验光学数据非常匹配。循环伏安法(CV)和紫外光电子能谱法(UPS)均用于确定HOMO的位置,结果各不相同。通过CV获得的值比通过UPS获得的值更深,并且与理论计算具有很好的相关性。但是,UPS值与具有独立前沿分子轨道(FMO)的系统的预期结果更加一致。UPS结果也得到静电势图的支持,这表明LUMO和HOMO中的电子密度分别几乎完全沿着2,6-或4,8轴定位。