双功能镧系化合物:合成、结构、磁性和荧光性质 |
Bi-functional Lanthanide Compounds: Synthesis, Structures, Magnetism and Fluorescence |
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摘要: 利用N-succinopyridine(HL)配体,成功合成了2个同构型镧系化合物[Ln(HL)2(H2O)4]Cl3(Ln=Pr(1),Eu(2))并对其进行了结构表征。1和2均由羧酸配体双桥联金属离子形成1D链结构,再通过氢键进一步相互连接构成了3D超分子结构。变温磁化率测试表明1中Pr(Ⅲ)离子之间存在反铁磁相互作用,而在2中,Eu(Ⅲ)离子之间则表现出弱铁磁相互作用。固态发光测试观察到2可以发出很强的红光,但由于Pr(Ⅲ)离子的能隙较大,未观察到1的特征峰。 |
关键词: 镧系元素 N-琥珀酰吡啶 双功能化合物 磁性 发光 |
基金项目: 国家自然科学基金(No.91545201,21601185),中国科学院前沿科学重点研究计划(No.XDB20010000,QYZDB-SSW-SLH020),中国科学院青年创新促进会(No.2017J01033)和福建省自然科学基金(No.2018J01028)资助项目 |
Abstract: Two isostructural lanthanide (Ln) compounds with N-succinopyridine (HL) ligand, namely[Ln(HL)2(H2O)4]Cl3 (Ln=Pr (1), Eu (2)), have been synthesized and structurally characterized. Both 1 and 2 feature 1D chains with metal ions double-bridged by carboxyl ligands, which are further interconnected through hydrogen bonds to yield a 3D supramolecular architecture. Variable temperature magnetic susceptibility measurements revealed the presence of antiferromagnetic interaction between Pr(Ⅲ) ions for 1 but weak ferromagnetic interactions between Eu(Ⅲ) ions for 2. Solid-state luminescence measurement showed that 2 emitted intense red luminescence, but no characteristic peak of 1 was observed due to the large energy gap of the Pr(Ⅲ) ion. |
Keywords: lanthanide N-succinopyridine bi-functional compound magnetism luminescence |
投稿时间:2019-07-02 修订日期:2019-09-17 |
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韩永芳,蔡丽珍,郭国聪.双功能镧系化合物:合成、结构、磁性和荧光性质[J].无机化学学报,2019,35(11):2117-2124. |
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