Construction of NIR luminescent nanoscale lanthanide complexes with new flexible Schiff base ligands
来源期刊：JOURNAL OF RARE EARTHS2020年第2期
论文作者：Bichen Yuan Junbin Tao Fei Wang Chaoqun Zhu Min Li Xiaoping Yang
文章页码：143 - 147
摘 要：Four mono-and bi-nuclear lanthanide complexes [LnL1（No3）（H2O）DMF]（Ln=Nd（1） and Yb（2）） and[Ln2（L2）2（OAc）2]（Ln=Nd（3） and Yb（4）） were synthesized by using two new Schiff base ligands with long（CH2）2 NH（CH2）2 backbone.The lengths of the Schiff base ligands are about 1.8 nm.The bi-nuclear lanthanide complexes 3 and 4 have nanoscale structures with sizes of approximately 0.7 nm×1.1 nm×1.6 nm.For 3,the molar ratio of Nd:Br:O obtained by the energy dispersive X-ray spectroscopy analysis is in agreement with the crystal structure.The chromogenic Schiff base ligands in1-4 can efficiently transfer energy to lanthanide ions,thus,these complexes exhibit the typical NIR luminescence of lanthanide ions.Interestingly,3 and 4 have higher NIR emission quantum yields(Φem)than 1 and 2,respectively.
Bichen Yuan，Junbin Tao，Fei Wang，Chaoqun Zhu，Min Li，Xiaoping Yang
Zhejiang Key Laboratory of Carbon Materials,College of Chemistry and Materials Engineering,Wenzhou University
摘 要：Four mono-and bi-nuclear lanthanide complexes [LnL1（No3）（H2O）DMF]（Ln=Nd（1） and Yb（2）） and[Ln2（L2）2（OAc）2]（Ln=Nd（3） and Yb（4）） were synthesized by using two new Schiff base ligands with long（CH2）2 NH（CH2）2 backbone.The lengths of the Schiff base ligands are about 1.8 nm.The bi-nuclear lanthanide complexes 3 and 4 have nanoscale structures with sizes of approximately 0.7 nm×1.1 nm×1.6 nm.For 3,the molar ratio of Nd:Br:O obtained by the energy dispersive X-ray spectroscopy analysis is in agreement with the crystal structure.The chromogenic Schiff base ligands in1-4 can efficiently transfer energy to lanthanide ions,thus,these complexes exhibit the typical NIR luminescence of lanthanide ions.Interestingly,3 and 4 have higher NIR emission quantum yields(Φem)than 1 and 2,respectively.
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