Nanohybrid for Emission Constructed with Nanozone and Molecules

由于禁带的f-f跃迁，Nd(III)的吸收很弱。我们用吸收强的8-喹啉作为光敏剂，通过分子筛腔内的激发态能量传递给Nd(III)，成功地实现了近红外光致发光。在低振动条件下，用双全氟甲基硫脲与Nd3+进行配位反应。将8-喹啉引入沸石空腔中，实现了对Nd3+的光敏化发射，并成功地将沸石空腔中形成的Ru-三联吡啶配合物作为光敏剂用于沸石空腔中的近红外发射。这种络合物在系间交叉中表现出很高的效率，给出了激发三重态。当Nd(III)同时引入沸石空腔时，该配合物的MLCT三重态的发射被有效地猝灭，表明发生了有效的能量转移。

Absorption of Nd(III) is weak due to forbidden f-f transition. We have employed 8-quinolinol with strong absorption as a photosensitizer and succeeded in photoluminescence in near-infrared region through energy transfer from the excited state to Nd(III) encapsulated in a zeolite cavity. Nd(III) was ligated by bis-perfluoromethylsulfoarride for providing a low-vibration condition. 8-Quinolinol was introduced into the zeolite cavity, resulting in photosensitized emission of Nd(III).Ruthenium tris-bipyridyl complex formed in the zeolite cavity was successfully employed as a photosensitizer for near infared emission of Nd(III) in the Zeolite cavity. This complex shows high efficiency in intersystem crossing, giving excited triplet state. The emission from MLCT triplet state of the complex was effectively quenched when Nd(III) was introduced into the zeolite cavity together, indicating that the efficient energy transfer occurs.