Luminescent pillared Ln(III)-Zn-II heterometallic coordination frameworks with two kinds of N-heterocyclic carboxylate ligands

作者：Liu Sui Jun; Jia Ji Min; Cui Yu; Han Song De; Chang Ze^*

来源：Journal of Solid State Chemistry, 2014, 212: 58-63.

DOI：10.1016/j.jssc.2014.01.003

• Ln(III)-Zn-II
• Metal oxides
• N-heterocyclic carboxylate
• Luminescent properties

In our efforts toward rational design and systematic synthesis of 'pillar-layer' structure coordination frameworks, four new Ln(III)-Zn-II heterometallic coordination polymers (CPs) based on two kinds of N-heterocyclic carboxylic ligands with formula {[LnZn(L1)(2)(L-2)(H2O)m] center dot nH(2)O}(infinity) (Ln=La (1), Eu (2), Gd (3) and Dy (4), m=3 (for 1) and 2 (for 2-4), n=8 (for 1) and 7 (for 2-4), H(2)L1= pyridine-2,3-dicarboxylate acid, HL2=isonicotinic acid), have been synthesized under hydrothermal reaction of Ln(2)O(3), ZnO, H(2)L1 and HU. CP 1 has a three-dimensional (3D) structure with a (3,6)-connected sit topology network, while CPs 2-4 are isostructural with 3D single-node pcu alpha-Po topology network. Also, luminescent properties of these CPs have also been investigated. The emission of 1 and 3 should be attributed to the coordination-perturbed ligand-centered luminescence and the emission spectra of 2 and 4 show the characteristic bands of the corresponding Ln(III) ions.

• 出版日期2014-4
• 单位南开大学