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A low molecular weight OLED material: 2-(4-((2-hydroxyethyl)(methyl)amino)benzylidene)malononitrile. Synthesis, crystal structure, thin film morphology, spectroscopic characterization and DFT calculations

机译:低分子量OLED材料:2-(4-(((2-羟乙基)(甲基)氨基)苄基)亚硝基腈。 合成,晶体结构,薄膜形态,光谱性表征和DFT计算

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摘要

2-(4-((2-Hydroxyethyl)(methyl)amino)benzylidene)malononitrile (HEMABM) was synthesized from 4-[hydroxymethyl(methyl)amino]benzaldehyde and propanedinitrile to obtain a low molecular weight fluorescent material with an efficient solid-state emission and electroluminescence properties comparable to the well-known poly(2-methoxy-5(2 '-ethyl)hexoxyphenylenevinylene) (MEH-PPV). The HEMABM was used to prepare an organic light-emitting diode by a solution process. Despite the title compound being a small molecule, it showed optical properties and notable capacity to form a film with smooth morphology (10.81 nm) closer to that of polymer MEH-PPV (10.63 nm). The preparation of the device was by spin coating, the electrical properties such as threshold voltage were about 1.0 V for both HEMABM and MEH-PPV, and the luminance 1300 cd m(-2) for HEMABM and 2600 cd m(-2) for MEH-PPV. This low molecular weight compound was characterized by SCXRD, IR, NMR, and EI. Besides a quantitative analysis of the intermolecular interactions by PIXEL, density functional theory (DFT) calculations are reported.
机译:2-((((2-羟基乙基)(甲基)氨基)苄基)用4-λ氨基]苯甲醛和丙磺腈合成丙二腈(HEMABM),得到低分子量荧光材料,具有有效的固体 - 与众所周知的聚(2-甲氧基-5(2'-乙基)己氧基苯乙烯)(MeH-PPV)相当的状态发射和电致发光性能。通过溶液方法用于制备有机发光二极管的HemaBm。尽管化合物是小分子,但它显示出光学性质和显着的能力,形成具有更接近聚合物MeH-PPV(10.63nm)的光滑形态(10.81nm)的膜。该装置的制备是通过旋涂,诸如阈值电压的电性能为HemaBM和MeH-PPV的约1.0V,HemaBM的亮度1300cdm(-2)和2600cd m(-2) Meh-PPV。该低分子量化合物的特征在于SCXRD,IR,NMR和EI。除了通过像素的分子间相互作用的定量分析之外,报告了密度泛函理论(DFT)计算。

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    《RSC Advances》 |2019年第49期|共14页
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  • 正文语种 eng
  • 中图分类 化学;
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