【作者】 李亚丽；

【导师】 王弋戈；

【作者基本信息】 河北工业大学 ， 物理化学， 2017， 硕士

【摘要】 稀土配合物由于其独特的发光特性,如大斯托克斯位移,尖锐的发射曲线,长寿命激发态,在光、电、照明、传感等领域展现出潜在的应用价值。但是,稀土配合物自身具有较差的光热稳定性,极大地限制了它们在实际中的应用。众所周知,无机层状化合物,其稳定性较好,夹层的形状和空间大小可以调节,同时客体分子插层并与之进行结合后能将其功能化。本论文主要讨论稀土有机配合物组装到无机层状基质中构筑的稀土有机-无机层状杂化发光材料,这种材料既保持了稀土配合物优异的发光性能,又具有良好的光热稳定性,并且在金属离子和小分子传感方面有应用价值。具体研究内容如下:1、设计合成了两种带负电荷的Eu（DPA）₃]^3-、Tb（DPA）₃]^3-和带正电荷的层状双氢氧化合物（LDHs）,它们通过静电作用在石英表面层层交替沉积制备出均一的、透明的（LCs/LDH）_n UTFs。紫外-可见吸收光谱和荧光光谱显示出这两种超薄膜的厚度和荧光强度,随着沉积循环次数的增加其有规律的增长。AFM和SEM表明超薄膜具有周期性的分层结构以及均匀的表面形态。（LCs/LDH）_n UTFs作为高选择的、灵敏的荧光传感器用于检测水溶液中的Fe³⁺。2、利用磷酸锆层板表面呈强电负性的特点,设计合成两种带正电的三元稀土铕配合物,将这两种稀土铕配合物在没有任何极性有机物的协助下直接插入到α-ZrP的层间。通过FTIR,XRD,TEM,SEM,TGA和荧光光谱等方法对所得的插层化合物进行表征,结果表明插层发光材料表现出更好的热稳定性和光稳定性。此外,插层材料被设计为用于检测乙二胺蒸汽的高选择性和高灵敏度的荧光传感器。更多还原

【Abstract】 Lanthanide complexes display potential applications in many fields such as photoelectric,lighting,sensing,due to the integrity of unique optical properties such as sharp and characteristic emissions,and long excited state lifetimes.Yet,lanthanide complexes possess poor photo and thermal stability,which limit their practical application on many aspects.It is well known that inorganic layered materials,have good light stability and thermal stability,and the shape and size of the interlayer can be adjusted,while functionalization can be performed when the guest molecules are intercalated.In this work,we mainly discuss synthesis of organic-inorganic hybrid luminescent materials by electrostatic interaction of lanthanide complexes intercalation into inorganic layered materials.These materials not only can integrate effectively the excellent luminescence properties of lanthanide complexes but also can exert good light and thermal stability of inorganic matrix and can be applied in metal ions and small molecule sensing.1、Highly transparent ultrathin films（UTFs）based on alternative layer-by-layer assembly of Eu-and Tb-based lanthanide complexes（LCs）and Mg-Al-layered double hydroxide（LDH）nanosheets are designed herein.UV-visible absorption and fluorescence spectroscopy showed an orderly growth of the two types of ultrathin films upon increasing the number of deposition cycles.AFM and SEM measurements indicate that the films feature periodic layered structures as well as uniform surface morphology.Luminescent investigations reveal that（LCs/LDH）n UTFs can detect Fe³⁺with relative selectivity and high sensitivity.2、We design the direct ion exchange of luminescent LCs into the gallery spaces ofα-ZrP without any pretreatment with polar organic molecules.The obtained intercalation compounds were characterized FTIR spectroscopy,XRD,TEM,SEM,TGA,Photoluminescence spectroscopy.Luminescent intercalation composites exhibit expanded layer distance and higher thermal-and photostability.Moreover,we report a simple,effective and robust luminescent sensor for detecting organic amines based on the above materials.Luminescent investigations reveal that ZrPA can detect ethylenediamine（En）vapors with relative selectivity and high sensitivity.更多还原