用两种方法分别将四足配体铽配合物[TbL(NO3)]2+和[TbL]3+插层组装到了蒙脱土(MT)层板间,制备出超分子复合发光材料[TbL(NO3)]2+-MT和[TbL]3+-MT.方法一:通过离子交换反应让配离子[TbL(NO3)]2+取代钠基蒙脱土(Na-MT)中的Na+离子,插层组装到蒙脱土层板间.方法二:用配体L与铽基蒙脱土(Tb-MT)反应,使配体插入蒙脱土层板间与Tb3+离子配位.用元素分析、XRD,FT-IR,UV-vis和热分析对材料进行了表征,并对其荧光性质进行了研究.结果表明,复合材料保持了蒙脱土良好的层柱结构特征,其层间距d001值与插层配离子的直径吻合较好,配离子以单层形式分布于蒙脱土层板间,复合材料中配合物的热稳定性有明显提高.在紫外光激发下,复合材料发出较强的Tb3+特征荧光,其发射光谱与相应配合物的发射光谱很相似;复合材料中配合物的相对荧光强度较相应纯配合物有明显提高,荧光寿命较长;配合物的激发波长向可见光区发生位移,说明插层组装实现了对配合物激发波长的调制作用.
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