Lanthanide Metalloligand Strategy toward d鈥揻 Heterometallic Metal鈥揙rganic Frameworks: Magnetism and Symmetric-Dependent Luminescent Properties
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- 作者：Xiao-feng Huang ; Jing-xin Ma ; Wei-sheng Liu
- 刊名：Inorganic Chemistry
- 出版年：2014
- 出版时间：June 16, 2014
- 年：2014
- 卷：53
- 期：12
- 页码：5922-5930
- 全文大小：564K
- 年卷期：v.53,no.12(June 16, 2014)
- ISSN：1520-510X
文摘
On the basis of lanthanide metalloligands, [Ln(ODA)3]3鈥?/sup> (H2ODA = oxydiacetic acid), three series of d鈥揻 heterometallic metal鈥搊rganic frameworks, {[Co(H2O)6]路[Ln2(ODA)6Co2]路6H2O}n [1; Ln = Gd (1a), Dy (1b), and Er (1c)], {[Ln2(ODA)6Cd3(H2O)6]路mH2O}n [2; Ln = Pr (2a), Nd (2b), Sm (2c), Eu (2d), and Dy (2e), m = 9, 6, or 3], and {[Cd(H2O)6]路[Ln2(ODA)6Cd2]路mH2O}n [3; Ln = Dy (3a), Ho (3b), Er (3c), Tm (3d), and Lu (3e), m = 6 or 12], were designed and synthesized by a solvent volatilization and hydrothermal method. Magnetic investigation of 1 reveals the ferromagnetic interactions between the metal ions. In 2, LnIII ions occupied the inversion centers, which are confirmed by the fact that the emission intensity ratio of 5D0 鈫?7F1 to 5D0 鈫?7F2 of the EuIII ion is much more than 3 in 2d. It is worth noting that, in 2d, the intensity ratio I(5D0鈫?sup>7F1)/I(5D0鈫?sup>7F2) could decrease significantly upon the introduction of different hydrophilic guest molecules, which implies that the luminescent properties of 2d have a strong dependence on the geometry of the first coordination sphere of the EuIII ion.