[Eu(Bipy)_2]Cl_3和[Tb(Bipy)_2]Cl_3在有机功能化剥层水滑石表面上的组装及光致发光性质

Assembly of Rare-earth Complex [Eu(Bipy)_2]Cl_3 and [Tb(Bipy)_2]Cl_3 on Surface Modified Exfoliated LDHs and Photoluminescent Properties of the Assemblies

以乙酰基丙氨基三乙氧基硅烷对剥层镁铝水滑石进行了表面硅烷化修饰,得到了表面硅烷化修饰的剥层水滑石复合材料.然后在该复合材料表面进行了[Eu(Bipy)2]3+和[Tb(Bipy)2]3+分子组装,得到了剥层水滑石复合稀土发光体.组装体的紫外激发发射光谱表明,稀土配合物被组装到经硅烷化试剂修饰的剥层水滑石表面后,其电偶极跃迁较原配合物有很大提高,热稳定性也有提高.从主客体材料相互作用角度对稀土配合物电偶极跃迁的提高进行了解释.

[Eu（Bipy）2]Cl3 and [Tb（Bipy）2]Cl3 are assembled on surface of exfoliated Mg2Al-NO3-LDH modified with N-[3-（triethoxysily）propyl]-acetamide by covalent bonding and photophysical properties of the assembly were studied.Emission spectra show that the fluorescence intensities of the rare earth complexes are increased on the surface of exfoliated Mg2Al-NO3-LDH greatly.The fluorescence intensities of EM-Mg2Al-NO3-LDH/[Eu（Bipy）2]3＋ and EM-Mg2Al-NO3-LDH/[Tb（Bipy）2]^3＋ are 43.5 and 53.7 times of the pure compelex.XPS and UV-Vis studies show that the increase is illuminated from the interactions between the host and guests,and the affections from host＇s structure to the luminance of guests were studied carefully.