摘要
以4-乙酰基苯甲酸甲酯和水合肼为原料,通过脱水反应合成了4-(5-甲基-噁二唑基)-苯基-1,3丁二酮,并由IR和1H NMR测试技术得以确证。考察了该化合物的紫外-可见吸收光谱和电化学性质。另外,由紫外-可见吸收光谱的起峰波长λonset确定所对应能级轨道差(Eg)能量值为2.72 eV,而最高占有分子轨道(HOMO)和最低未占分子轨道(LUMO)的能量大小则由循环伏安法和紫外-可见吸收光谱法共同测得。测量结果表明,该化合物具有较高的电子亲和势,明显高于常用的电子传输材料2-(4-联苯基)-5-(对叔丁基苯基-1,3,4-噁二唑(PBD)。因而将其用作电子传输层时,可以大大提高电致发光器件的效率。
4-（5-Methyl-oxadiazole）-phenyl-1,3 butyl diketonate was synthesized via dehydration reaction of 4-acetyl phenylformic ester and hydrazine hydrate, and characterized by IR and ^1H NMR. UV-Vis spectra and electrochemical characteristics of the compound were investigated. In addition, the energy gap（Eg） was evaluated to be 2. 72 eV from the onset absorption wavelength （λonset /nm） of the UV-Vis spectra, and the energy levels of the highest occupied molecular orbital （HOMO） and the lowest unoccupied molecular orbital （LUMO） were calculated by cyclic voltammetry（CV） and UV-Vis spectrometry. The measurement results of the energy levels indicate that the electron affinity of the compound is higher than that of PBD which is the normal electron-transporting material. Thus it could improve the efficiency of the electroluminescent device when it is used as electron transport layer.spectra,electrochemistry, energy levels
出处
《应用化学》
CAS
CSCD
北大核心
2007年第7期742-746,共5页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金资助项目(20475050)
