Synthesis, structure and near-infrared (NIR) luminescence of series of Zn₂Ln (Ln = Nd, Yb or Er) complexes based on the Salen-type Schiff-base ligand with the flexible linker

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• 作者：Wei-Xu Feng^a ; Ya-Ni Hui^a ; Guo-Xiang Shi^a ; Dan Zou^a ; Xing-Qiang Lü ; ^a ; ^b ; ^{lvxq@nwu.edu.cn} ; Ji-Rong Song^a ; Dai-Di Fan^a ; Wai-Kwok Wong^c ; ^{wkwong@hkbu.edu.hk} ; Richard A. Jones^d
• 关键词：Zn2Ln arrayed Schiff-base complexes ; Sensitization and energy transfer ; NIR luminescent properties
• 刊名：Inorganic Chemistry Communications
• 出版年：2012
• 出版时间：June, 2012
• 年：2012
• 卷：20
• 期：Complete
• 页码：33-36
• 全文大小：603 K

文摘

With the Zn-Schiff-base [ZnL(CH₃CN)] from the Salen-type Schiff-base ligand H₂L (H₂L = N,N?bis(3-methoxy-salicylidene)cyclohexane-1,2-diamine) with the flexible linker as the precursor, a series of hetero-trinuclear Zn₂Ln complexes [Zn₂Ln(L)₂(Cl)₃] (Ln = Nd, 1; Ln = Yb, 2; Ln = Er, 3; Ln = Gd, 4) are obtained by the further reaction with LnCl₃¡¤6H₂O, respectively. The results of their photophysical studies show that the strong and characteristic NIR luminescence with emissive lifetimes in the microsecond range, has been sensitized from the excited state (both ¹LC and ³LC) of the ligand due to the effective intramolecular energy transfer.