1,3-二吡啶基苯Pt(II)芳炔配合物的合成与发光性质研究毕业论文
2022-04-13 20:01:08
论文总字数:31130字
摘 要
1,3-二吡啶基苯配体及其铂配合物具有良好的发光性能,其结构易被修饰,因此可用来制备有机发光二极管、化学传感器等。
本文对炔配体单元进行修饰,以芴为桥联,通过Ullmann/Suzuki偶联反应对分子结构进行修饰,分别引进供电子的叔丁基咔唑和吸电子的萘酰亚胺基团,得到相应的炔配体。然后与相应的铂氯配合物反应,得到两个新型1,3-二(2-吡啶基)苯铂芳基炔配合物,产率中等,并通过核磁氢谱表征。
通过其紫外-可见吸收光谱、荧光发射光谱表征其光物理性质,两个配合物在紫外区小于370nm处有强的吸收峰,这些吸收峰来自于配体结构上的 1π-π*跃迁,而在 370-600 nm 范围内呈现一种宽而低的吸收峰,这些峰来自于金属-配体电荷转移( MLCT) 的吸收。荧光发射光谱显示了两个配合物发光区域在黄光到红光区域, 认为其发射态主要来源于3MLCT/3ILCT。由于与芴相连的两个集团为供吸电子能力不同,因此,出现的发射峰也不同。
最后,本文的研究结果在光限幅等领域有着潜在的应用,同时为同类化合物在有机光电材料中的其他应用提供了参考依据。
关键词: 铂配合物 炔配体 发光性质
Synthesis and photophysical properties of pyridine-1,3-phenyl Pt (II) complexes with different acetylide ligands
Abstract
Pyridine-1,3-benzene ligands and their platinum complexes with good luminescence properties and its structure easily modified. Therefore they can be used to prepare an organic light-emitting diodes, chemical sensors, and so on .
In aspects of acetylene ligands, fluorene group as bridge can be easily modified. The introductions of electron donor of tert-butyl-carbazole and electron withdrawing of naphthalimide by Ullmann / Suzuki coupling reaction give the corresponding alkynyl ligands. Two novel platinum complexes are obtained by reaction of platinum chlorine complexes and corresponding acetylene ligands. The yield of final complexes is moderate and the structure was confirmed characterized by 1H NMR spectroscopy.
Photophysical properties of two platinum complexes were recorded by UV - visible absorption and fluorescence emission spectra. As shown in figures, strong absorption peak of two complexes less than 370 nm is assigned as 1π-π * transition of the ligand and metal - ligand charge transfer (the MLCT) absorption was located at range of 370 to 600 nm. Fluorescence emission spectra show the emission of two complexes belongs to yellow to red region, which was main from its state 3MLCT / 3ILCT emission. Since acetylide ligands including the fluorene connected to two groups with different electron donor and accepter , it appears different emission peak.
Finally, the complexes in this study may have potential applications in many areas such as optical limiting, while providing a reference for other similar compounds used in the organic photoelectric materials.
Keywords: platinum complexes; acetylene ligand; photophysical properties
目录
摘要 I
Abstract II
第一章 文献综述 1
1.1 引言 1
1.2 金属有机铂配合物 1
1.2.1 环金属铂配合物 2
1.2.2 三齿钳形配体的铂配合物 3
1.2.3 含氮芳环配体的铂配合物 3
1.2.4 铂芳基炔配合物 4
1.3 本论文研究内容和意义 5
第二章 1,3-二吡啶基苯Pt(II)芳炔配合物炔配体的合成与结构表征 7
2.1 前言 7
2.2 实验部分 8
2.2.1 实验试剂 8
2.2.2实验仪器 9
2.2.3 合成步骤 9
2.3 结果与讨论 15
第三章 1,3-二吡啶基苯Pt(II)芳炔配合物的合成与结构表征 16
3.1 前言 16
3.2 实验部分 17
3.2.1 实验试剂 17
3.2.2 实验仪器 17
3.3.3 合成步骤 18
3.3 结果与讨论 20
第四章 1,3-二吡啶基苯Pt(II)芳炔配合物的光物理性质研究 21
4.1 前言 21
4.2 实验部分 21
4.2.1 主要试剂 21
4.2.2 主要仪器 21
4.2.3 溶液配制 22
4.2.4 紫外-可见吸收光谱测试 22
4.2.5 荧光发射光谱的测试 22
4.3 结果与讨论 23
4.3.1 紫外-可见吸收光谱 23
4.3.2 荧光发射光谱 24
第五章 结论与展望 26
5.1.结论 26
5.2、展望 26
参考文献 28
附录 34
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