Photofunctional host-guest hybrid materials and thin films of lanthanide complexes covalently linked to functionalized zeolite A
Photofunctional host-guest hybrid materials and thin films of lanthanide complexes covalently linked to functionalized zeolite A
复制标题
光功能主客体杂化材料和与功能化沸石 A 共价连接的稀土配合物薄膜
DOI：
10.1039/c3dt52652f
复制
发表时间：
2014-01-01
影响因子：
4
通讯作者：
Yan, Bing
中科院分区：
文献类型：
--
作者：
Hao, Ji-Na;Yan, Bing
合成了八种A型沸石（ZA）的主-客体组装体及其薄膜。首先将镧系元素配合物（Eu（TTA）（n）或Tb（TAA）（n））嵌入沸石A的笼中，然后将镧系元素配合物（Eu（L）或Tb（L），L = bipy或phen）通过3-（甲基丙烯酰氧）丙基三甲氧基硅烷（gamma-MPS）接枝到官能化沸石A的表面，制备了沸石A的组装体。采用XRD、FT-IR、SEM和荧光光谱等手段对所得有机-无机杂化材料进行了表征。首先，用XRD研究了离子交换程度对A型分子筛作为镧系配合物主体的晶体稳定性的影响。结果表明，在A型分子筛孔道中掺入大量镧系元素络合物后，A型分子筛骨架发生降解和部分坍塌。通过对离子交换程度的严格控制，制备后的A型沸石骨架结构保持了较好的完整性。其次，如SEM图像所示，以这种方式获得的沸石A组装体的薄膜具有均匀致密堆积和晶体在ITO玻璃上的高度覆盖的性质。第三，对所有材料的发光行为进行了详细的研究。其中，四个白色发光材料从一个三组分系统，包括一个蓝色发射沸石A基质，红色发射铕配合物和绿色发射铽配合物得到。
Eight host-guest assemblies of zeolite A (ZA) and their thin films have been synthesized. The assembly of zeolite A was prepared by first embedding lanthanide complexes (Eu(TTA)(n) or Tb(TAA)(n)) into the cages of zeolite A and then grafting lanthanide complexes (Eu(L) or Tb(L), L = bipy or phen) onto the surface of functionalized zeolite A via 3-(methacryloyloxy) propyltrimethoxysilane (gamma-MPS). The obtained organic-inorganic hybrid materials were investigated by means of XRD, FT-IR, SEM and luminescence spectroscopy. Firstly, the dependence of the crystal stability of zeolite A as the host of lanthanide complexes on the level of ion exchange was studied by XRD. The results indicated the degradation and partial collapse of zeolite A framework occurred upon doping with high amounts of lanthanide complexes into its channels. The integrity of zeolite A's framework was well maintained after fabrication through careful control of the ion-exchange extent. Secondly, the thin films of zeolite A assemblies obtained this way have the properties of homogeneous dense packing and a high degree of coverage of the crystals on the ITO glass, as shown in SEM images. Thirdly, the luminescence behavior of all the materials were investigated in detail. Among them, four white light-emitting materials from a three-component system that comprises a blue-emitting zeolite A matrix, a red-emitting europium complex and a green-emitting terbium complex were obtained.