基于层状稀土氢氧化物(LRHs)有机/无机超分子发光材料的组装、调控及白光发射研究

Consindering the drawback of organic luminescent block /film materials are liable to aggregate and have bad light/heat stability, and the thickness, arrangement of film cannot be controlled accurately. This project investigates the fabrication of layered rare-earth hydroxides (LRHs) composites intercalated by organic photoactive guests and build block materials by ion-exchange and swelling /restoration methods. Construction novel organic/inorganic supramolecular luminescent film materials by delamination/reassembly, LBL methods. Selecting organic guests and modifying their groups to obtain target organics. The multicolor luminescent materials can be prepared by controlling the arrangement structures of the interlayer organic guests and the interaction between host and guest, especially obtain white-emission materials by tuning the colors and intensity. Fabricating supramolecular thin film materials through delamination /reassembly method, and tuning luminescence by changing the assemble order and number of layers. Design and construction of pH-responsive luminous film and prepare luminescent film sensors. Research the luminescent influence of the synergetic effect of organic guests and the layer rare earth ions and explore the relationship between structure and luminescence property. This study is an unique idea with strong innovation and belongs to cross-integration of inorganic, organic, supramolecular, and rare-earth chemistry, showing important theoretical significance and application values.

针对有机块状/薄膜发光材料易于聚集、光热稳定性差以及无法精确控制薄膜厚度、排列方式等缺陷，本项目提出以层状稀土氢氧化物(LRHs)为主体，有机光活性分子为客体，利用离子交换、膨润/回复等组装块状材料，剥离/再配列、LBL法构建薄膜，构筑新型有机/无机超分子发光块状与薄膜材料。筛选有机客体并进行基团修饰，引入LRHs层间，通过控制有机客体在层间的排布结构、主客体相互作用等实现发光调控，得到多色发光材料，尤其是调控颜色和强度比例以制备白光发射材料。采用剥离/再配列层层组装得到超分子发光薄膜材料，通过控制发光基元、组装顺序及层数，实现发光调控。设计构筑酸碱响应型发光薄膜，制备发光膜传感器。研究有机客体与层板稀土离子的协同作用对发光性能的影响，探讨结构与性能的关系。本课题研究思路独具特色，具有较强创新性，是无机、有机、超分子、稀土化学等交叉融合基础上的课题，具有重要理论意义和应用价值。

本项目以层状稀土氢氧化物(LRHs)为主体，有机光活性分子为客体，通过超分子组装作用构筑新型有机/无机复合发光材料。探讨结构组装机理，研究实现有机客体在层间可控排列的最优条件，研究其结构与发光性能，获得构效关系；研究不同插层结构（层间定位方式、倾斜角度）等条件对复合体发光性能的影响；通过引入表面活性剂，解决了有机分子的层间聚集导致的荧光淬灭问题；研究了复合体处于固态、剥离、膨润等状态的层间排布及发光机理；通过控制有机客体在层间的排布结构、主客体相互作用、客客体相互作用等实现发光调控，获得多色发光材料；调控发光颜色强度和比例制备白光发射材料。项目研究获得了许多创新性研究成果，为设计和开发新型有机/无机超分子发光材料提供了重要依据。