Syntheses, crystal structures and near-infrared luminescent properties of holmium (Ho) and praseodymium (Pr) ternary complexes

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• 作者：Song Dang ; Li-Ning Sun ; Shu-Yan Song ; Hong-Jie Zhang ; Guo-Li Zheng ; Yan-Feng Bi ; Hua-Dong Guo ; Zhi-Yong Guo ; Jing Feng
• 关键词：Ho ; Pr ; dbm ; Ternary complexes ; NIR luminescence
• 刊名：Inorganic Chemistry Communications
• 出版年：2008
• 期刊代码：39_13877003
• 类别：ch
• 出版时间：May 2008
• 卷：11
• 期：5
• 页码：531-534
• 文件大小：128 K

摘要

A series of near-infrared (NIR) luminescent complexes Ho(dbm)₃L and Pr(dbm)₃L [where dbm = dibenzoylmethane; L = 1,10-phenanthroline (phen), 2,2′-bipyridine (bipy), or triphenyl phosphate oxide (TPPO)] were synthesized. Their elemental analyses, crystal structures, fluorescence spectra and luminescent lifetimes were successfully investigated. After ligand-mediated excitation of the complexes, they all show the characteristic NIR luminescence of the corresponding Ln³⁺ ions (Ln = Ho, Pr), which can be attributed to efficient energy transfer from the ligands to the central Ln³⁺ ions, an antenna effect.