引用本文:
赵国欣, 杜晨霞, 冶保献. 新型含β-二酮取代基的二唑衍生物的合成与电化学性质[J]. 应用化学,
2007, 24(7): 742-746.
Citation: ZHAO Guo-Xin, DU Chen-Xia, YE Bao-Xian. Synthesis and Electrochemical Characteristics of A New Oxadiazol Derivative with β-Diketonate[J]. Chinese Journal of Applied Chemistry, 2007, 24(7): 742-746.
Citation: ZHAO Guo-Xin, DU Chen-Xia, YE Bao-Xian. Synthesis and Electrochemical Characteristics of A New Oxadiazol Derivative with β-Diketonate[J]. Chinese Journal of Applied Chemistry, 2007, 24(7): 742-746.
新型含β-二酮取代基的二唑衍生物的合成与电化学性质
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-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-1,3,4-二唑(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。
English
Synthesis and Electrochemical Characteristics of A New Oxadiazol Derivative with β-Diketonate
Abstract:
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.
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Key words:
- oxadiazole
- / β-diketonate
- / UV-Vis spectra
- / electrochemistry
- / energy levels
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